Acanthocephala: A phylum of parasitic worms, closely related to tapeworms and containing two genera: Moniliformis, which sometimes infects man, and Macracanthorhynchus, which infects swine.Helminthiasis, Animal: Infestation of animals with parasitic worms of the helminth class. The infestation may be experimental or veterinary.Dogs: The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)PeruMoniliformis: A genus of roundworms of the phylum Acanthocephala, parasitic in rats, mice, hamsters, dogs and cats. Occasional infection in man produces inflammation and ulceration of the intestinal mucosa.Bonding, Human-Pet: The emotional attachment of individuals to PETS.Dog Diseases: Diseases of the domestic dog (Canis familiaris). This term does not include diseases of wild dogs, WOLVES; FOXES; and other Canidae for which the heading CARNIVORA is used.Rotifera: A class of minute animals of the phylum Aschelminthes.Animals, Domestic: Animals which have become adapted through breeding in captivity to a life intimately associated with humans. They include animals domesticated by humans to live and breed in a tame condition on farms or ranches for economic reasons, including LIVESTOCK (specifically CATTLE; SHEEP; HORSES; etc.), POULTRY; and those raised or kept for pleasure and companionship, e.g., PETS; or specifically DOGS; CATS; etc.Hip Dysplasia, Canine: A hereditary disease of the hip joints in dogs. Signs of the disease may be evident any time after 4 weeks of age.Phylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Trees: Woody, usually tall, perennial higher plants (Angiosperms, Gymnosperms, and some Pterophyta) having usually a main stem and numerous branches.Plant Leaves: Expanded structures, usually green, of vascular plants, characteristically consisting of a bladelike expansion attached to a stem, and functioning as the principal organ of photosynthesis and transpiration. (American Heritage Dictionary, 2d ed)Colon, Descending: The segment of LARGE INTESTINE between TRANSVERSE COLON and the SIGMOID COLON.Quality of Life: A generic concept reflecting concern with the modification and enhancement of life attributes, e.g., physical, political, moral and social environment; the overall condition of a human life.Electronic Mail: Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Cell Lineage: The developmental history of specific differentiated cell types as traced back to the original STEM CELLS in the embryo.Evolution, Molecular: The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.Biological Evolution: The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Amber: A yellowish fossil resin, the gum of several species of coniferous trees, found in the alluvial deposits of northeastern Germany. It is used in molecular biology in the analysis of organic matter fossilized in amber.Zooplankton: Minute free-floating animal organisms which live in practically all natural waters.Dominican Republic: A republic in the Greater Antilles in the West Indies. Its capital is Santo Domingo. With Haiti, it forms the island of Hispaniola - the Dominican Republic occupying the eastern two thirds, and Haiti, the western third. It was created in 1844 after a revolt against the rule of President Boyer over the entire island of Hispaniola, itself visited by Columbus in 1492 and settled the next year. Except for a brief period of annexation to Spain (1861-65), it has been independent, though closely associated with the United States. Its name comes from the Spanish Santo Domingo, Holy Sunday, with reference to its discovery on a Sunday. (From Webster's New Geographical Dictionary, 1988, p338, 506 & Room, Brewer's Dictionary of Names, 1992, p151)Hypermastigia: A class of endosymbiont EUKARYOTES, in the group PARABASALIDEA, that are obligate mutualists in the digestive tracts of wood-eating insects. Hypermastigotes produce CELLULASE that breaks down the cellulose in wood so that insects can metabolize it.Isoptera: An order of insects, restricted mostly to the tropics, containing at least eight families. A few species occur in temperate regions of North America.Fossils: Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.Reproduction, Asexual: Reproduction without fusion of two types of cells, mostly found in ALGAE; FUNGI; and PLANTS. Asexual reproduction occurs in several ways, such as budding, fission, or splitting from "parent" cells. Only few groups of ANIMALS reproduce asexually or unisexually (PARTHENOGENESIS).Cladocera: A suborder of CRUSTACEA, order Diplostraca, comprising the water fleas. They are benthic filter feeders that consume PHYTOPLANKTON. The body is laterally compressed and enclosed in a bivalved carapace, from which the head extends.PhilippinesTrinidad and Tobago: An independent state in the Lesser Antilles in the West Indies, north of Venezuela, comprising the islands of Trinidad and Tobago. Its capital is Port of Spain. Both islands were discovered by Columbus in 1498. The Spanish, English, Dutch, and French figure in their history over four centuries. Trinidad and Tobago united in 1898 and were made part of the British colony of Trinidad and Tobago in 1899. The colony became an independent state in 1962. Trinidad was so named by Columbus either because he arrived on Trinity Sunday or because three mountain peaks suggested the Holy Trinity. Tobago was given the name by Columbus from the Haitian tambaku, pipe, from the natives' habit of smoking tobacco leaves. (Webster's New Geographical Dictionary, 1988, p1228, 1216 & Room, Brewer's Dictionary of Names, 1992, p555, 547)Asia, Central: The geographical area of Asia comprising KAZAKHSTAN; KYRGYZSTAN; TAJIKISTAN; TURKMENISTAN; and UZBEKISTAN. The desert region of Kara Kum (Qara Qum) is largely in Turkmenistan and the desert region of Kyzyl Kum (Kizil Kum or Qizil Qum), is in Uzbekistan and Kazakhstan. (From Webster's New Geographical Dictionary, 1988, p233, 590, 636)Gardening: Cultivation of PLANTS; (FRUIT; VEGETABLES; MEDICINAL HERBS) on small plots of ground or in containers.Fishes: A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.Goldfish: Common name for Carassius auratus, a type of carp (CARPS).Camallanina: A suborder of nematodes characterized by larvae lacking cephalic hooks and a tail that is generally long and pointed.Checklist: Aid for consistent recording of data such as tasks completed and observations noted.Rivers: Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).Oligochaeta: A class of annelid worms with few setae per segment. It includes the earthworms such as Lumbricus and Eisenia.Trematoda: Class of parasitic flukes consisting of three subclasses, Monogenea, Aspidogastrea, and Digenea. The digenetic trematodes are the only ones found in man. They are endoparasites and require two hosts to complete their life cycle.Trematode Infections: Infections caused by infestation with worms of the class Trematoda.BangladeshMetacercariae: Encysted cercaria which house the intermediate stages of trematode parasites in tissues of an intermediate host.Skin Care: Maintenance of the hygienic state of the skin under optimal conditions of cleanliness and comfort. Effective in skin care are proper washing, bathing, cleansing, and the use of soaps, detergents, oils, etc. In various disease states, therapeutic and protective solutions and ointments are useful. The care of the skin is particularly important in various occupations, in exposure to sunlight, in neonates, and in PRESSURE ULCER.Host-Parasite Interactions: The relationship between an invertebrate and another organism (the host), one of which lives at the expense of the other. Traditionally excluded from definition of parasites are pathogenic BACTERIA; FUNGI; VIRUSES; and PLANTS; though they may live parasitically.Poverty Areas: City, urban, rural, or suburban areas which are characterized by severe economic deprivation and by accompanying physical and social decay.Infant, Newborn, Diseases: Diseases of newborn infants present at birth (congenital) or developing within the first month of birth. It does not include hereditary diseases not manifesting at birth or within the first 30 days of life nor does it include inborn errors of metabolism. Both HEREDITARY DISEASES and METABOLISM, INBORN ERRORS are available as general concepts.Cholera: An acute diarrheal disease endemic in India and Southeast Asia whose causative agent is VIBRIO CHOLERAE. This condition can lead to severe dehydration in a matter of hours unless quickly treated.Floods: Sudden onset water phenomena with different speed of occurrence. These include flash floods, seasonal river floods, and coastal floods, associated with CYCLONIC STORMS; TIDALWAVES; and storm surges.
(1/41) Helminth fauna of carnivores distributed in north-western Tohoku, Japan, with special reference to Mesocestoides paucitesticulus and Brachylaima tokudai.

In the winter of 1998-1999, we collected parasitological data from 54 wild carnivores in the north-western part of Tohoku region, Japan. These consisted of 38 martens (Martes melampus melampus), 14 raccoon dogs (Nyctereutes procyonoides viverrinus) and 2 foxes (Vulpes vulpes japonica). Collected helminth parasites were 11 nematode, 10 trematode, 3 cestode, and a single acanthocephalan species, including 5 hitherto unknown species for this research area or the mainland of Japan (Honshu). Mesocestoides paucitesticulus was for the first time recorded from martens as well as from carnivores distributed in Honshu. Brachylaima tokudai originally recorded from Urotrichus talpoides in the central part of Honshu was for the first time found from a raccoon dog.  (+info)

(2/41) Recent Studies on Neoechinorhynchus curemai Noronha, 1973 (Acanthocephala: Neoechinorhynchidae), in Prochilodus lineatus Valenciennes, 1836, from Volta Grande Reservoir, MG, Brazil.

The present work described helminth parasites of curimbata, Prochilodus lineatus Valenciennes, 1836 from Volta Grande Reservoir, MG, Brazil. Eighteen fishes with average 46.7 +/- 1.1 cm length and 1,674.8 +/- 75.6 g weight were collected. Of the analysed fishes, 15 were parasitized with acanthocephalans in the intestine, showing a prevalence of 83.3%. The helminth was identified as Neoechinorhynchus curemai Noronha, 1973 (Acanthocephala: Neoechinorhynchidae). It differs from other species in dimension of characters and morphology. From the original description of N. curemai, it differs from the biggest dimension of testis, elongated cement gland, nucleated lemnisci, eggs size, larger proboscis hooks length in the middle and in the third circle in males and larger hooks in the anterior circle in females. A smaller percentage occupied by the reproductive system in female trunk was reported. The observation of paratypes of N. curemai of Noronha (1973) showed a great similarity with those of the present work. This fact complements the helminth description from elsewhere.  (+info)

(3/41) Gastrointestinal parasites and prey items from a mass stranding of false killer whales, Pseudorca crassidens, in Rio Grande do Sul, Southern Brazil.

The gastrointestinal tract of 14 false killer whales, 6 males and 8 females, stranded in June 1995 in southern Brazil, with total standard lengths from 338 to 507 cm, were analysed for endoparasites and food items. A pregnant female had a male foetus of 77.5 cm. Parasites were found in all 14 false killer whales. The nematode Anisakis simplex (Rudolphi, 1809) was found in the stomach of 57% of the animals and the acanthocephalan Bolbosoma capitatum (Linstow, 1889) Porta, 1908 was present in the intestine of all specimens and showed densities up to 600 m-1. An unidentified cestode (Tethrabothridae) was found also in the intestines of 14% of the individuals. The high infections of B. capitatum and A. simplex were not directly related with the cause of death. In the stomachs of four females, beaks of at least eight specimens of the oceanic and epipelagic species Ommastrephes bartramii (Lesueur, 1821) were found, with mantle lengths ranging from 189.8 to 360.9 mm. The distribution of O. bartramii in the coast of Rio Grande do Sul is consistent with false killer whales feeding in continental shelf waters.  (+info)

(4/41) Rates of nucleotide substitution in sexual and anciently asexual rotifers.

The class Bdelloidea of the phylum Rotifera is the largest well studied eukaryotic taxon in which males and meiosis are unknown, and the only one for which these indications of ancient asexuality are supported by cytological and molecular genetic evidence. We estimated the rates of synonymous and nonsynonymous substitutions in the hsp82 heat shock gene in bdelloids and in facultatively sexual rotifers of the class Monogononta, employing distance based and maximum likelihood methods. Relative-rate tests, using acanthocephalan rotifers as an outgroup, showed slightly higher rates of nonsynonymous substitution and slightly lower rates of synonymous substitution in bdelloids as compared with monogononts. The opposite trend, however, was seen in intraclass pairwise comparisons. If, as it seems, bdelloids have evolved asexually, an equality of bdelloid and monogonont substitution rates would suggest that the maintenance of sexual reproduction in monogononts is not attributable to an effect of sexual reproduction in limiting the load of deleterious nucleotide substitutions.  (+info)

(5/41) Digenea and acanthocephala of elasmobranch fishes from the southern coast of Brazil.

New records for helminth species recovered from elasmobranch fishes in Brazil are established. Digenean and acanthocephalan parasites of elasmobranch fishes are reported from the southern coast of Brazil: Otodistomum veliporum (Creplin, 1837) Stafford, 1904 (Digenea: Azygiidae) in the stomach and spiral valve of Dipturus trachydermus and in the spiral valve of Squatina sp. Cystacanths and juveniles of the acanthocephalans Corynosoma australe Johnston, 1937 and Corynosoma sp., in the spiral valve of Squatina sp., Galeorhinus galeus and Hexanchus griseus and in the stomach of Squalus megalops; a juvenile of Gorgorhynchus sp., in the spiral valve of Sphyrna zygaena. Dipturus trachydermus and Squatina sp. are new host records for O. veliporum. Digeneans and acanthocephalans are reported for the first time parasitizing elasmobranch fishes in Brazil.  (+info)

(6/41) Electrophysiology of acanthocephalan body wall muscles.

Body wall muscles of an acanthocephalan Macracanthorhynchus hirudinaceus were studied by means of scanning and light microscopy and intracellular recording of potentials. Three types of spontaneous potential changes were found: larger (L) potentials which usually exhibited overshoot and were as large as 65 mV; smaller symmetric (A) potentials approximately 15 mV in amplitude; and even smaller asymmetric (S) potentials which sometimes reached 10 mV. The potentials recorded depended upon the position of the electrode in the anterior-posterior, as well as the medial-lateral, axis. Tetrodotoxin eliminated L but not S potentials. Ouabain lengthened the time for depolarization of L potentials and depolarized the membrane potentials. It is suggested that the rete system activates the body wall muscles in Acanthocephala.  (+info)

(7/41) Effect of Pomphorhynchus laevis (Acanthocephala) on putative neuromodulators in the intestine of naturally infected Salmo trutta.

Immunohistochemical and pathological studies were carried out on the digestive tract of parasitized and uninfected specimens of Salmo trutta (L.). A total of 124 brown trout were collected on several occasions from 3 tributaries of the Brenta River, northern Italy. Twenty-eight individuals of S. trutta (22.6%) were parasitized with Pomphorhynchus laevis (Miller, 1776). The occurrence of P. laevis in the trout gut significantly increased the number of endocrine cells immunoreactive to calcitonin gene-related peptide (CGRP), beta-endorphin, met-enkephalin, neuropeptide Y (NPY) and Substance P (SP) antisera. Moreover, bombesin-, cholecistokinin-8- (CCK-8), leu-enkephalin- and serotonin- (5-HT)-like immunoreactive cells were less numerous in the intestine of the parasitized brown trout. A strong positive immunoreactivity was observed in nerve fibres and neurones of the myenteric plexus of the parasitized fish; the antisera involved in this positive reactivity were bombesin, met-enkephalin, SP and vasoactive intestinal peptide (VIP). More neurones immunoreactive to anti-CGRP and anti-5-HT sera were noted in the myenteric plexus and in the inner layer of the tunica muscularis of the infected fish. Most of the above-mentioned neuromodulators are known to control gut motility, digestive/absorptive processes, as well as the immune response. The changes induced by parasites in the neuroendocrine system of the brown trout are discussed.  (+info)

(8/41) Helminth parasites of the southern sea otter Enhydra lutris nereis in central California: abundance, distribution and pathology.

From October 1997 to May 2001, the gastrointestinal tracts from 162 beach-cast southern sea otters Enhydra lutris nereis were examined for helminth parasites and associated lesions. Carcasses were collected opportunistically in central California between Pt. San Pedro and Pt. Arguello. The primary goals of this study were to examine spatial and temporal variability in mortality due to parasite infection, identify factors associated with increased risk of infection, and illustrate the process of intestinal perforation by Profilicollis spp. Two genera and 4 species of acanthocephalans (Profilicollis altmani, P. kenti, P. major, Corynosoma enhydri) were found in 46.3% (Profilicollis spp.) and 94.4% (C. enhydri) of the carcasses examined. Three species of Digenea (Microphallus pirum, M. nicolli, Plenosoma minimum) were found in 47% of carcasses, at times in massive numbers (> 3000 per cm2). This is the first report of the latter 2 species from the sea otter. Mortality resulting from infection by Profilicollis spp. occurred in 13.0% (n = 21) of sampled carcasses, either directly, due to perforation of the intestinal wall and peritonitis (9.9%, n = 16), or indirectly, due to inhibition of host nutrient uptake or depletion of host energy reserves to fight chronic infections (3.1%, n = 5). The most massive infections (< 8760 parasites), and all cases of intestinal perforation occurred in carcasses infected by P. altmani and/or P. kenti. Mortality due to infection by Profilicollis spp. occurred more frequently among juvenile and old-adult females (chi2 = 17.479, df = 9, p = 0.045) from sand and mixed habitats in Monterey and Santa Cruz in the north of the sea otter range (chi2 = 9.84, df = 4, p = 0.045). Spatial differences in sea otter mortality coincided with the relative distributions of Profilicollis altmani, P. kenti, and P. major, and may reflect differences in sea otter diet, or differences in intensity of infection in intermediate hosts. Mortality rate due to infection by Profilicollis spp. decreased between 1998 and 2001, though differences were not significant (chi2 = 3.983, df = 3, p = 0.40), and may vary on multi-year cycles due to environmental factors such as density of definitive hosts (e.g. the surf scoter Melanitta perspicillata), or El Nino. Corynosoma enhydri did not cause significant damage to the intestine of the host, even when present in great numbers.  (+info)

*  Acanthocephala declivis
... is a species of North American true bugs with a range from the southern United States to Guatemala and ... which is not present in other Acanthocephala species within its range. Blatchley, W. S. (1926). Heteroptera of Eastern North ...
*  Acanthocephala (bug)
Acanthocephala is a New World genus of true bugs in the family Coreidae. The name is derived from the Greek akanth- meaning " ... "genus Acanthocephala Laporte, 1833". Coreoidea Species File Online. Retrieved 2013-10-17. Yonke (15 May 1969). "Description of ... The known species of Acanthocephala are: A. affinis (Walker, 1871) A. alata (Burmeister, 1835) A. angustipes (Westwood, 1842) A ... Review of Acanthocephala (Hemiptera: Heteroptera: Coreidae) of America north of Mexico with a key to species. Zootaxa 2835: 30- ...
*  Acanthocephala (disambiguation)
Acantocephala may refer to: Acanthocephala, a phylum of parasitic platyzoan "worms" Acanthocephala (insect), a genus of ...
*  Florida leaf-footed bug
The genus name Acanthocephala means "spiny head" and was inspired by the pointed tylus at the tip of the head. Acanthocephala ... "Acanthocephala femorata". Integrated Taxonomic Information System. "Acanthocephala femorata, leaf-footed bug". FloridaNature. ... The Florida leaf-footed bug (Acanthocephala femorata) is a species of insect. ...
*  Moniliformis moniliformis
In Biology of the Acanthocephala (ed. Crompton, D. W. T. & Nickol, B. B.), pp. 213-271. Cambridge University Press, Cambridge. ... 2], "Phylum: Acanthocephala." Lecture. Animal Parasitology. Kansas State, 14 March 2005. Web. 23 February 2010. [3], ... 1985 Berenji, F; Fata, A; Hosseininejad, Z. "A case of Moniliformis moniliformis (Acanthocephala) infection in Iran". Korean J ... Moniliformis moniliformis is a parasite of the Acanthocephala phylum in the family Moniliformidae. Along with ...
*  Taxonomy of the Cactaceae
synonyms: Acanthocephala Backeb., Brasilicactus Backeb., Brasiliparodia F.Ritter, Brasilocactus Fric (nom. inval.), ...
*  Echinorhynchidae
Amin, A. O. (2013). Classification of the acanthocephala. Folia Parasitologica, 60(4), 273-305.. ...
*  Acanthocephalus echigoensis
... is a species of parasitic worm in the phylum Acanthocephala. Found both in California and in ... Crompton, David William Thomasson; Nickol, Brent B. (1985). Biology of the Acanthocephala. Cambridge: Cambridge University ...
*  Transvenidae
Johnston, T. H. & Edmonds, S. J. (1947). Australian Acanthocephala No. 5. Transactions of the Royal Society of Australia, 71, ... Acanthocephala: Palaeacanthocephala) and a new family of acanthocephalans from Australian wrasses (Pisces: Labridae). Folia ...
*  Stigmastanol
Thomasson Crompton, David William; Nickol, Brent B. (1985). Biology of the Acanthocephala. Cambridge University Press. p. 185. ...
*  Satyu Yamaguti
V. Acanthocephala, 1963 (monograph). Parasitic Copepoda and Branchiura of Fishes, 1963 (monograph). Monogenetic Trematodes of ... Acanthocephala, Echinorhynchidae). Many species were dedicated to Satyu Yamaguti and are named yamagutii (List in ION), or, ...
*  Acanthocephalus anguillae
... is a species of parasitic worm in the phylum Acanthocephala. An intestinal parasite, it is found both ... Dezfuli, Bahram S.; Biaggi, Sara De (May 2000). "Copulation of Acanthocephalus anguillae (Acanthocephala)". Parasitology ...
*  Thomas Harvey Johnston
1912). An experiment: ["in the production of newspaper articles" on public health]. (1930). Acanthocephala, (Australasian ...
*  Molteno Institute for Research in Parasitology
Morris, Simon Conway; Crompton, David W T (1982). "The Origins and Evolution of the Acanthocephala". Biological Reviews. 57: 85 ...
*  Starfish
in Lawrence (2012) Florkin, Marcel (2012). Chemical Zoology V3: Echinnodermata, Nematoda, and Acanthocephala. Elsevier. p. 75- ...
*  Henricia lisa
Marcel Florkin, Marcel (2012). Chemical Zoology V3: Echinnodermata, Nematoda, and Acanthocephala. Elsevier. p. 77. ISBN 978-0- ...
*  Ancalagon (animal)
Morris, S. C.; Crompton, D. W. T. (1982). "The Origins and Evolution of the Acanthocephala". Biological Reviews. 57: 85. doi: ...
*  Archiacanthocephala
... is a class within the phylum of Acanthocephala. They are microscopic parasitic worms that attach themselves ... Biology of the Acanthocephala, Cambridge University Press, 1985, p. 31. [1]. ...
*  Canada warbler
A New Species of Acanthocephala from North American Birds". The Journal of Parasitology. 35 (4): 391-410. doi:10.2307/3273430. ...
*  Moniliformidae
Acanthocephala: Moniliformidae) from marsupials of Australia and New Guinea. Journal of parasitology, 75(2): 215-217. ISSN 0022 ... JSTOR Singleton, J.; Richardson, D.J.; Lockhart, J.M. 1993: Severe moniliformiasis (Acanthocephala: Moniliformidae) in a gray ...
*  Strongyloides ardeae
"Acanthocephala from Kenya with descriptions of two new species." The Journal of parasitology (1967): 634-637. Yoshino, Tomoo, ...
*  Liophis miliaris
Also Cystacaths of Oligatanthorynchus spira (Acanthocephala) were in the peritoneum. The prevalence found in the four different ...
*  Rotifer
... a, Acanthocephala and Seisonida make up a clade called Syndermata. The word "rotifer" is derived from a Latin word ... The Acanthocephala, previously considered to be a separate phylum, have been demonstrated to be modified rotifers. The exact ... One possibility is that the Acanthocephala are closer to the Bdelloidea and Monogononta than to the Seisonidea; the ...
*  Acanthocephalus (animal)
Acanthocephala: Echinorhynchidae), a parasite of Anguilla species (Anguillidae) from Reunion Island". Parasite. 14 (2): 131-134 ... Acanthocephala) from Bufo marinus (Bufonidae: Amphibia) in Hawaii". Parasite. 6 (3): 269-272. doi:10.1051/parasite/1999063269. ...
*  Palaeacanthocephala
... ("ancient thornheads") is a class within the phylum Acanthocephala. The adults of these parasitic ...
Acanthocephala (Greek ἄκανθος, akanthos, thorn + κεφαλή, kephale, head) is a phylum of parasitic worms known as acanthocephalans, thorny-headed worms, or spiny-headed worms, characterized by the presence of an eversible proboscis, armed with spines, which it uses to pierce and hold the gut wall of its host. Acanthocephalans have complex life cycles, involving at least two hosts, which may include invertebrates, fish, amphibians, birds, and mammals. About 1150 species have been described. The Acanthocephala were thought to be a discrete phylum. Recent genome analysis has shown that they are descended from, and should be considered as, highly modified rotifers. This finding is an example of molecular phylogenetics. This unified taxon is known as Syndermata. The earliest recognisable description of Acanthocephala - a worm with a proboscis armed with hooks - was made by Italian author Francesco Redi (1684). In 1771, Joseph Koelreuter proposed the name Acanthocephala. Philipp Ludwig ...
The Acanthocephala (Greek akanthos, thorn + kephale, head) are a group of parasitic worms. They may be called known as acanthocephales, thorny-headed worms, or spiny-headed worms. They have an evertable proboscis,[1] armed with spines, which they use to pierce and hold the gut wall of the host. Acanthocephalans have no gut and absorb nutrients directly from the hosts gut.. Acanthocephalans have complex life cycles, with various hosts, including invertebrates, fishes, amphibians, birds, and mammals. The juveniles are parasitic in crustaceans and insects. Adults live in the digestive tract of vertebrates, especially fish. About 1150 species have been described.[2]. The Acanthocephala were thought to be a separate phylum. Recent genome analysis has shown that they are closely related to rotifers. Since all parasites are derived from free-living forms, the Acanthocephalans are modified rotifers.[3] This is an example of molecular phylogenetics. In due course, spiny-headed worms will probably be ...
Cabrera, R..; Rojas, R..; Davalos, M.., 1999: Corynosoma obtuscens Lincicome, 1943 Acanthocephala Polymorphidae in Canis familiaris from Chincha City, Peru Corynosoma obtuscens Lincicome, 1943 Acanthocephala Polymorphidae en Canis familiaris de la ciudad de Chincha, Peru
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author ...
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Members of phylum Acanthocephala are parasites of vertebrates and arthropods and are distributed worldwide. The phylum has traditionally been divided into three classes, Archiacanthocephala, Palaeacanthocephala, and Eoacanthocephala; a fourth class, Polyacanthocephala, has been recently proposed. However, erection of this new class, based on morphological characters, has been controversial. We sequenced the near complete 18S rRNA gene of Polyacanthorhynchus caballeroi (Polyacanthocephala) and Rhadinorhynchus sp. (Palaeacanthocephala); these sequences were aligned with another 21 sequences of acanthocephalans representing the three widely recognized classes of the phylum and with 16 sequences from outgroup taxa. Phylogenetic relationships inferred by maximum-likelihood and maximum-parsimony analyses showed Archiacanthocephala as the most basal group within the phylum, whereas classes Polyacanthocephala + Eoacanthocephala formed a monophyletic clade, with Palaeacanthocephala as its sister group. ...
Movement of schooling adults apparently restricted to coastal areas proximal to natal estuaries (Ref. 4639). They migrate up rivers and even small streams to spawn in lakes and quiet stretches of rivers, then return to sea shortly after spawning (Ref. 4639); landlocked populations also ascend affluent rivers and streams. Larvae remain in vicinity of spawning grounds, forming schools at sizes less than 10 mm TL, within one to two weeks after hatching (Ref. 4639), then descend in summer and autumn or even as late as November or December. Feed on shrimps and small fishes; the young on diatoms, copepods and ostracods while in rivers. Utilized fresh, dried or salted, smoked and frozen; eaten fried (Ref. 9988). Also used for crab and lobster bait and sometimes for pet food (Ref. 9988). Parasites found are Acanthocephala, cestodes, trematodes and copepods. Overfishing, pollution and impassable dams cause the decline of stocks (Ref. 37032). ...
... is a fully searchable abstracts database of internationally published research on helminthology, covering taxonomy, biology, pathology, immunology, diagnosis, epidemiology, treatment and control of all helminths (Monogenea, Aspidogastrea, Digenea, Cestoda, Acanthocephala, Nematoda) parasitic in man and domestic and wild animals.
... is a fully searchable abstracts database of internationally published research on helminthology, covering taxonomy, biology, pathology, immunology, diagnosis, epidemiology, treatment and control of all helminths (Monogenea, Aspidogastrea, Digenea, Cestoda, Acanthocephala, Nematoda) parasitic in man and domestic and wild animals.
Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, ...
Preface Section 1The Single-celled Animal Parasites 1 Subkingdom Protozoa/Phylum Sarcomastigophora/Phylum Apicomplexa/Phylum Myxozoa/Phylum Microspora/Phylum Ciliophora Section 2Helminths 2 Phylum Platyhelminthes/Turbellaria/Monogenea/Trematoda 3 Class Cestoidea (Cestodaria and Eucestoda) 4 Phylum Acanthocephala 5 Phylum Nematoda/Enoplida/Rhabditida/Strongylida/Ascaridida/Oxyurida/Spirurida 6 Phylum Nematomorpha 7 Phylum Annelida Section 3Phylum Arthropoda 8 Subphylum Crustacea 9 Order Acari 10 Class Insecta 11 Lice (Anoplura and Mallophaga) 12 Order Diptera 13 Order Hemiptera 14 Phylum Pentastomida Section 4Laboratory Techniques 15 Technique Procedures Appendixes 1: Reagents and Solutions 2: Some Vertebrate Diseases and Infections, together with the Arthropods Important in Their Transmission 3: Life Cycle Laboratory Exercises IndexMurray Dailey is the author of Meyer, Olsen & Schmidts Essentials of Parasitology, published 1996 under ISBN 9780697159830 and ISBN 0697159833. [read more] ...
Citation: Gibson, D. (2017). Acanthogyrus (Acanthosentis) acanthuri Cable & Quick, 1954. In: Gibson, D. (2017). World list of marine Acanthocephala. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=448611 on 2017-10-16 ...
The nematode Camallanus lacustris initially alters host behaviour to arguably reduce predation on its host before it reaches infectivity. Thereafter slight changes of host behaviour into the opposite direction occur. This follows a pattern previously predicted [45] and shown in other systems [13,15,32,46]. The manipulation by C. lacustris is similar to but more pronounced than that of the cestode Schistocephalus solidus in the same copepod host [13,32]. Nevertheless, host manipulation by C. lacustris and S. solidus result in a similar reduction of predation susceptibility [16]. Different complex life cycle parasites that exploit the same trophic link also adopt convergent life-history strategies [47], suggesting that their host manipulation should also cause similar host behaviour.. Once we have shown that there is conflict (be it between two manipulating or one manipulating and one not manipulating parasite), we focus on the outcome of this conflict. This is where our main findings are. In any ...
Jehl, J., E. Johnson. 2004. Wing and Tail Molts of the Ruddy Duck. Waterbirds, 27(1): 54-59. Joyner, D. 1977. Behavior of Ruddy Duck Broods in Utah. The Auk, 94: 343-349. Korschgen, C., L. George, W. Green. 1985. Disturbance of Diving Ducks by Boaters on a Migrational Staging Area. Wildlife Society Bulletin, 13(3): 290-296. Kortright, F. 1967. The Ducks, Geese, and Swans of North American. Harrisburg, Pennsylvania: The Stackpole Company. Matthias, D. 1963. Helminths of Some Waterfowl from Western Nevada and Northeastern California. The Journal of Parasitology, 49/1: 155. Munoz-Fuentes, V., A. Green, M. Sorenson, J. Negro. 2006. The ruddy duck Oxyura jamaicensis in Europe: natural colonization or human introduction?. Molecular Ecology, 15: 1441-1453. Pough, R. 1951. All the Birds of Eastern and Central North America. Garden City, New York: Doubleday & Company Inc.. Priebe, M. 1952. Acanthocephalan Parasites of Waterbirds in Eastern Washington. Transactions of the American Microscopical Society, ...
The results of the present study revealed different fractionation patterns of stable isotopes in the selected parasite species. In general, the nematodes were enriched by approximately 2‰ in the heavier nitrogen isotope with respect to their host in contrast to the acanthocephalans, which were depleted in the range between 1 and 2‰. Accordingly, the larval nematodes were on a higher trophic level with significant δ 15N enrichment compared with the host, which resembles a consumer-diet discrimination pattern [12]. In contrast, the acanthocephalans were on a lower trophic level than the fish host and the nematodes, respectively. The differences between the investigated parasite species could be attributed to differences in their taxonomic position, their feeding strategy, their developmental stage and their localization in the host.. Overall, the parasites taxonomy in combination with its way of nutrient uptake determines its trophic position with respect to the host. Although there are no ...
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The existence of adaptive host manipulation by parasites has received increasing empirical support in recent years. Here I develop an optimality model of the extent of host manipulation, incorporating within-host group size, relatedness and a range of realistic cost-benefit functions. The model highlights the cooperative nature of host manipulation, and the potential for cheating this entails. When relatedness in parasite groups is minimal, manipulation is suppressed, but not eradicated, reflecting the importance of interhost selection. A distinctive threshold phenomenon is predicted for a wide range of parameter values. Below the group size threshold, manipulation is zero. Above the threshold, the predicted behaviour depends critically on the biological details of the individual-group interaction. The host-manipulation model is discussed in the light of two potential applications. If parasite group size is assumed to be a static characteristic of a parasite species or strain, the model ...
Sweeting, Roger [Photographer] (2016) Cucullanus truttae pharynx [image] Freshwater Biological Association [publisher] Permalink: http://www.environmentdata.org/archive/fbaia:2671 ...
There are further, as yet unsolved mysteries relating to C. cetaceum. As mentioned at the start of this post, the stomach is a very different habitat to the intestine. The life of parasites living in the intestine is fairly leisurely, being bathed a steady flow of nutrient-rich slush composed of finely-digested food infused with a cocktail of the hosts bodily secretions. In stark contrast, the stomach is an extremely harsh environment. It is where early stages of digestion takes place - where chunks of food are mashed up and soaked in harsh digestive juices. The content of the stomach is composed largely of chyme - an acidic mixture of partially digested food and acid which is not all that nutritious for parasites like acanthocephalans which absorb nutrients through their body surface. In addition, carnivorous marine mammals consume huge quantity of food whenever the opportunity arises; this results in unpredictable and heavy flows of food through the stomach which makes for an extremely ...
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Mark Armitage wrote: , , Dear All, , Does anyone have any references on parasites which alter intermediate , host behavior in order to increase chances of predation upon the , host? This is not very detailed, but I did hear that there was some type of parasite that would enter a pill bug (rolly polly), cause it to lose its adversion to light, and thusly increase the chances of it being comsumed by a bird. hope this helped a little, teresa ...
Walter, T. Chad (2013). Cyclops minutus Claus, 1863. In: Walter, T.C. & Boxshall, G. (2017). World of Copepods database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=360855 on 2017-12- ...
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Looking for online definition of acanthocephalans in the Medical Dictionary? acanthocephalans explanation free. What is acanthocephalans? Meaning of acanthocephalans medical term. What does acanthocephalans mean?
Molecular and morphological data regarding the relationships among the three classes of Rotifera (Bdelloidea, Seisonidea, and Monogononta) and the phylum Acanthocephala are inconclusive. In particular, Bdelloidea lacks molecular-based phylogenetic appraisal. I obtained coding sequences from the mitochondrial genomes of twelve bdelloids and two monogononts to explore the molecular phylogeny of Bdelloidea and provide insight into the relationships among lineages of Syndermata (Rotifera + Acanthocephala). With additional sequences taken from previously published mitochondrial genomes, the total dataset included nine species of bdelloids, three species of monogononts, and two species of acanthocephalans. A supermatrix of these 10-12 mitochondrial proteins consistently recovered a bdelloid phylogeny that questions the validity of a generally accepted classification scheme despite different methods of inference and various parameter adjustments. Specifically, results showed that neither the family
[Lorsque Gammarus pulex (L.) (Amphipoda) se nourrit de l'algue Nitella (Chlorophyceae, Charales), son comportement se caractérise de la manière suivante: 1) les appendices antérieurs empoignent l'algue; 2) la saillie, à la partie inférieure de la tête, est pressée contre l'algue; 3) le corps entier est soumis à de fortes vibrations. Le paroi cellulaire et les chloroplastes de Nitella sont ingurgités et il en est de même de ses épiphytes, c'est à dire Bulbochaete, Coleochaete scutata, Eunotia veneris et Oedogononium. L'analyse des excréments prouve cependant que la matière soumise à la digestion provient uniquement des chloroplastes de Nitella et des contenus cellulaires de Coleochaete scutata et Eunotia aeneris., Lorsque Gammarus pulex (L.) (Amphipoda) se nourrit de l'algue Nitella (Chlorophyceae, Charales), son comportement se caractérise de la manière suivante: 1) les appendices antérieurs empoignent l'algue; 2) la saillie, à la partie inférieure
Clément, P. 1985. The relationships of rotifers. In: S. Conway Morris et al. (eds.), The origins and relationships of lower invertebrates. Clarendon Press, Oxford.. Clément, P. and E. Wurdak. 1991. Rotifera. Pages 219-297 in: Microscopic Anatomy of Invertebrates, Vol. 4. F. W. Harrison and E. E. Ruppert, eds. Wiley-Liss, New York.. Ferraguti, M. and G. Melone. 1999. Spermiogenesis in Seison nebaliae (Rotifera, Seisonidea): further evidence of a rotifer acanthocephalan relationship. Tissue Cell 31:428 440. Funch, P., M.V. S rensen and M. Obst. 2005. On the phylogenetic position of Rotifera have we come any further? Hydrobiologia 546:11 28.. Garc a-Varela, M. and S. A. Nadler. 2006. Phylogenetic relationships among Syndermata inferred from nuclear and mitochondrial gene sequences. Molecular Phylogenetics and Evolution 40 (1):61-72.. Garey, J. R., T. J. Near, M. R. Nonnemacher, and S. A. Nadler. 1996. Molecular evidence for Acanthocephala as a subtaxon of Rotifera. J. Mol. Evol. ...
The effects of feeding two alternative live prey Hyalella azteca (freshwater gammarids) and Hyale media (marine gammarids) to Octopus maya hatchlings were compared with feeding adult Artemia sp., traditionally used during the first weeks of the life cycle. Hatchlings were fed ad libitum these three live preys during the first 15 days, and a paste elaborated with fresh squid and shrimp during the next 15 days when hatchling can be fed prepared diets. Weight (g) and specific growth rates (% day−1) were determined every 15 days. Octopus maya hatchlings fed with marine gammarids grew larger (6.9 ± 0.2% day−1) compared with hatchlings fed Artemia sp. or freshwater gammarids (4.8 ± 0.2% and 5.0 ± 0.3% day−1 respectively). Survival was also higher (92.2 ± 6.8%) for hatchlings fed marine gammarids, than for those fed Artemia sp. (74.5 ± 23.8%) or freshwater gammarids (41.2 ± 21.2%). The content of acylglycerides, cholesterol and proteins in O. maya fed marine gammarids suggested a better ...
Gammarus pulex were sampled from five English streams during April 1992. The population density, number of precopula pairs and incidence of parasitic infection were recorded, and the biomass was estim
Sam Bennet, P (1964) On Bomolochus sardinellae sp. nov. (Copepoda, Cycloporoa) parasitic on Sardinella albella. Journal of the Marine Biological Association of India, 6 (1). pp. 84-88. Samal, Amir Kumar and Nazar, A K A and Jayakumar, R and Tamilmani, G and Sakthivel, M and Rajendran, P and Gopakumar, G (2014) Musculoskeletal abnormalities in hatchery reared silver pompano, Trachinotus blochii (Lacépède, 1801). Indian Journal of Fisheries, 61 (3). pp. 122-124. Sanil, N K (2002) Electron microscopy in disease diagnosis - Winter school on recent advances in diagnosis and management of diseases in mariculture, 7th to 27th November 2002, Course Manual. [Teaching Resource] Sanil, N K and Asokan, P K and John, Lijo and Vijayan, K K (2011) Pathological manifestations of the acanthocephalan parasite, Tenuiproboscis sp. in the mangrove red snapper (Lutjanus argentimaculatus) (Forsskål, 1775), a candidate species for aquaculture from Southern India. Aquaculture, 310 (3-4). pp. 259-266. Sanil, N K and ...
The effects of the trematode Bucephalus polymorphus on the reproductive cycle of the zebra mussel Dreissena polymorpha were examined in mussel populations from the Drava River. The reproductive cycle was studied by histological examination of the gonads and quantified by an image analysing system to determine changes in volume of the entire visceral mass, gonads, digestive glands and in particular the volume of trematodes. Results confirmed that (1) gonads of D. polymorpha were affected by B. polymorphus infection more than any other organ and (2) development of cercariae in sporocysts of B. polymorphus coincides with host gonad maturation. This is the first study in which the image analysing system was used to determine the effect of trematodes on the reproductive cycle of D. polymorpha. Also, this is the first record of sporocysts of B. polymorphus in D. polymorpha in this part of Europe. ...
Focusing on feeding as an endpoint in ecotoxicological studies is a useful and sensitive tool to detect sub-lethal impacts on individual organisms with relevance to higher levels of organisation (i.e. population and ecosystem levels). Energy availability depends on feeding [[1],[2]], and the energy budget can be considered an indicator of the overall condition of an organism [[3]]. Feeding determines the health of a population because altered growth and reproduction can be instigated by an effect on feeding [[4]-[7]]. Furthermore, reduced feeding can, at weak levels, reduce the possibility of survival due to interference with further sub-lethal effects and, at strong levels, cause death. Beyond secondary impacts of effects on feeding at the population level, feeding activity can play a direct role at the ecosystem level due to its importance for nutrient cycling.. One group of organisms responsible for a high proportion of the nutrient cycling in freshwaters are detritivores like Gammarus due to ...
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Acanthocephalus dirus has a reproductive strategy that is unusual for its group - the acanthocephalans or the thorny-headed worms (Acantho = "thorns", Cephala = "head"). In fact it is unusual compared to most intestinal parasites. Unlike some tapeworms, which profligately cast off segments (each containing hundreds of eggs) into the wilderness with abandonment, A. dirus has rather different approach. The impetus that spurred on this piece of research were two separate observations: (1) fish that are infected with A. dirus do not have any worm eggs in their feces (unlike most animals infected with intestinal parasites) and (2) perfectly healthy and intact female worms were often expelled from the definitive host. What the researchers found was that instead of simply laying eggs that are expelled from the worm and from the host, a female A. dirus actually retains her eggs until she become completely bloated with them - at which point she exits gracefully from the host fishs digestive tract. Some ...
Acanthocephalus dirus has a reproductive strategy that is unusual for its group - the acanthocephalans or the thorny-headed worms (Acantho = "thorns", Cephala = "head"). In fact it is unusual compared to most intestinal parasites. Unlike some tapeworms, which profligately cast off segments (each containing hundreds of eggs) into the wilderness with abandonment, A. dirus has rather different approach. The impetus that spurred on this piece of research were two separate observations: (1) fish that are infected with A. dirus do not have any worm eggs in their feces (unlike most animals infected with intestinal parasites) and (2) perfectly healthy and intact female worms were often expelled from the definitive host. What the researchers found was that instead of simply laying eggs that are expelled from the worm and from the host, a female A. dirus actually retains her eggs until she become completely bloated with them - at which point she exits gracefully from the host fishs digestive tract. Some ...
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Gammarus dorsosetosus Mateus & Mateus, 1990, a freshwater amphipod endemic to Turkey, is herein reported for the second time from Turkey. Until now, there exists only one record of this species, i.e., the original description of Mateus & Mateus (1990). In order to contribute to the knowledge on distribution, ecology, and morphology of the species, detailed morphological descriptions and illustrations of the extremities of both sexes, distribution localities, and environmental conditions of the localities are given, in addition to a comparison with similar species. Gammarus dorsosetosus Mateus & Mateus, 1990, un amphipode d'eau douce endémique de Turquie, est signalé ici pour la deuxième fois dans ce pays. Jusqu'à présent, il n'existait qu'une seule mention de la présence de cette espèce, c'est-à-dire, la description originale de Mateus & Mateus (1990). Afin de contribuer à la connaissance sur la répartition, l'écologie et la morphologie de cette espèce, les
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Although host manipulation is likely to be costly for parasites, we still have a poor understanding of the energetic aspects underlying this strategy. It is traditionally assumed that physiological costs are inevitably associated with mechanisms evolved by parasites to induce the required changes in host behaviours. While most energetic expenditures of parasites relate primarily to bringing about the altered behaviours, manipulative parasites also have to consider the condition of their host during the manipulation. Here, we suggest that because of this trade-off, the energy required to accomplish parasite-induced behaviours may represent a key energetic constraint for parasites. Depending on the energetic expenditures specific to each type of manipulation, parasites should undergo selection to secure resources for their host to allow them to perform manipulated behaviours.. ...
Amolops minutus Orlov and Ho, 2007, Russ. J. Herpetol., 14: 222. Holotype: ZISP 7609, by original designation. Type locality: Ho Thau village, Ho Thau commune, Tam Duong district, Lai Chau Province, 22° 24′ 58.5″ N 103° 36′ 43.3″ E, altitude 2400 m a.s.l. (rapid stream on slope of Mu Hum mountain).. ...
We extracted data from two Irish lake surveys, Lough Neagh [11] and Lough Beg [12], on the presence of C. pseudogracilis at sites where either G. d. celticus or G. pulex were found separately, or where both Gammarus species were present together (n = 86); total abundances of Gammarus spp. in single and mixed species sites were similar [11,12]. We chose these lake datasets because all three species have been present for several decades and hence all species have had time to potentially colonize all sites [11,12]. For experiments, we collected G. d. celticus and G. pulex (males 14-15 mm body length; juveniles 4-6 mm; these species being equivalent in size) and female C. pseudogracilis (7-8 mm; this species being much smaller than the Gammarus spp.) from separate Isle of Man rivers, the Crogga, Middle and Colby, respectively. These rivers were similar with respect to water temperature, pH, conductivity and BOD5 (11.9-12.1°C, 7.0-7.2, 182-219 µS cm−1 and less than 2 mgl−1). Each species was ...
ARTICLES IN PEER REVIEWED JOURNALS. 1. Hilary Hurd (2015). Ant brains manipulated by a fungus. Microbiology Today 42:1, 18-21.. 2. Victoria Carter, Ann Underhill, Ibrahima Baber, Lakamy Sylla, Mounirou Baby, Isabelle Larget-Thiery, Agnès Zettor, Catherine Bourgouin, Ülo Langel, Ingrid Faye, Laszlo Otvos, John Wade, Sekou Traore, Mamadou Coulibaly, Frederic Tripet, Paul Eggleston and Hilary Hurd. 2013. Killer Bee Molecules: Antimicrobial Peptides as Effector Molecules to Target Sporogonic Stages of Plasmodium. Plos Pathogens. 9, 11, e1003790. 3. Emilie Taylor-Brown and Hilary Hurd. 2013. The first suicides: a legacy inherited by parasitic protozoans from prokaryote ancestors. Parasites and Vectors, 6: 108. 4. Hilary Hurd. 2012. Taking the fight to Malaria. Public service review: European Science and Technology. Issue 17.. 5. Hilary Hurd. 2012. Review of "Host manipulation by parasites" by David P. Hughes, Jacques Brodeur and Frédéric Thomas. Parasites and vectors 5:228. 6. Holly Matthews, ...
The body is made of the yarn I mentioned in an earlier post. The shell is made of a semi transparent scoubi sting which has been cut open lengthwise ...
Box plot of gammarid weight depending on infection and sex.Numbers below boxes show number of gammarids. Asterisks indicate significant differences.
A wide variety of parasites are known to cause changes in host behaviour. The altered behaviours range from simple changes in features such as activity and phototaxis, to the creation of behaviours that are new, and often ...
Certain crops are vulnerable to parasites that take control of their hosts behavior, forcing them to act, zombielike, in the intruders interest. The same is true in some animal species.
The question was originally proposed by a reader of "Ask Marilyn", a column in Parade Magazine in 1990. Marilyns correct solution, that switching doors was the best strategy, caused an uproar among mathematicians. While most people responded that switching should not matter, the contestants chances for winning in fact double if he switches doors. Part of the controversy, however, was caused by the lack of agreement on the statement of the problem itself. Most statements of the problem, including the one in Marilyns column, do not match the rules of the actual game show. This was a source of great confusion when the problem was first presented. The main ambiguities in the problem arise from the fact that it does not fully specify the hosts behavior. For example, imagine a host who wasnt required to always reveal a goat. The hosts strategy could be to open a door only when the contestant has selected the correct door initially. This way, the host could try to tempt the contestant to switch ...
The question was originally proposed by a reader of "Ask Marilyn", a column in Parade Magazine in 1990. Marilyns correct solution, that switching doors was the best strategy, caused an uproar among mathematicians. While most people responded that switching should not matter, the contestants chances for winning in fact double if he switches doors. Part of the controversy, however, was caused by the lack of agreement on the statement of the problem itself. Most statements of the problem, including the one in Marilyns column, do not match the rules of the actual game show. This was a source of great confusion when the problem was first presented. The main ambiguities in the problem arise from the fact that it does not fully specify the hosts behavior. For example, imagine a host who wasnt required to always reveal a goat. The hosts strategy could be to open a door only when the contestant has selected the correct door initially. This way, the host could try to tempt the contestant to switch ...
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False killer whales are highly unusual in this area. A March sighting of a baby being born next to a whale watching boat off Dana Point drew national attention and had experts amazed.. The calf was born when a pod of about 15 females pushed their way across the ocean near the Dana Point Headlands and huddled against the Manutea, a sailboat operated by Captain Tom Southern, with Capt. Daves Dolphin Safari and Whale Watch. Videos of the live birth went viral.. Forney is a false killer whale specialist. Mostly, she has studied the tropical species in Hawaii where they are more commonly found.. The unusually warm water off Southern California in the last four years has brought the tropical dolphins to the area along with a host of other warm-water species such as the loggerhead turtles, pelagic red crabs, sharks and by-the-wind-sailors - a sort of jellyfish.. Those oddities have also brought a host of sport fish such as yellow fin tuna, dorado and marlin. Those game fish are just what false killer ...
Feb 20, 2015; 3:18 PM ET San Diego tourists spot dozens of false killer whales while on a local boat tour. The whales are usually found in tropical climates but likely traveled this far north because of warm water.
A young false killer whale calf rescued on the west coast of Vancouver Island made it through the night, but the hard work of keeping it alive lies ahead, according to staff at the Vancouver Aquariums Marine Mammal Rescue Centre.
GAMMARUS (250ml tub) dried freshwater shrimps for turtles, tortoises, and large ornamental fish. Gammarus pulex are tiny crustaceans (around 2-3 cm) of the order Amphipoda. GAMMARUS are a major element in the diet of fish in the wild. | eBay!
The carapace and appendages of G. roeselii were often coated with stalked ciliates and epibiotic rotifers (Fig. 1a), however the gills and brood pouch were commonly associated with all epibiotic commensals. None of the epibiotic commensals induced an immune response from the host and were common throughout the G. roeselii population (Table 2).. A single animal was observed with a ciliated protist infection in the haemolymph, with accumulations of the parasite in the antennal gland, gills (Fig. 1d), heart and appendages. No immune response toward the parasitic protist was noted throughout the histological screen.. Gregarines (Apicomplexa) were commonly associated with the gut (50% prevalence) (Fig. 1e) and less frequently, the hepatopancreatic tubules (, 1%). Gregarines were often seen in large numbers in the gut with both extracellular and intracellular developmental stages with occasional observation of syzygy. Gregarines elicited no apparent immune response from the host but were detected in ...
21-Day Vietnam, Cambodia & Laos Highlights Tour, Travel to Vietnam, Cambodia & Laos in this 21-day Indochina tour, enjoy the highlights of Southeast Asia including Halong Bay, Saigon, Mekong, Angkor Wat, Luang Prabang
The leopard tortoise (Geochelone pardalis pardalis) is included in the class Reptilia and the order of Chelonia or Testudines [17]. The chelonian respiratory tract is divided into upper and lower respiratory tracts [18]. Inspired air enters the upper respiratory tract through the nares with the mouth closed. The lower respiratory tract is made up of the glottis, larynx, a short trachea, paired bronchi and paired multichambered lungs. Both lungs occupy the dorsal coelomic cavity in which the dorsal surface is adhered to the peritoneal lining of the dorsal coelomic cavity. Ventrally, the lungs are separated from the coelomic viscera by a non-muscular septum horizontale or pseudodiaphragm, to which they are attached. The paired bronchi enter the dorsal aspect of the lungs where they branch repeatedly to terminate into an open air space where the spongy faveolar tissues open into [18, 19]. Respiratory tract disease in chelonians is often multifactorial and coupled with environmental inadequacies. ...
Espesye sa langaw ang Anopheles minutus[1]. Una ning gihulagway ni Macquart ni adtong 1834. Ang Anopheles minutus sakop sa kahenera nga Anopheles sa kabanay nga Culicidae.[1][2]. Kini nga matang hayop na sabwag sa Senegal.[1] Pagka karon wala pay siak nga nalista ubos niini niya.[1]. ...
Looking for antitoxic? Find out information about antitoxic. any of a group of antibodies formed in the body as a response to the introduction of poisonous products, or toxins toxin, poison produced by living... Explanation of antitoxic
This paper outlines the findings of a qualitative study nested within a cross-sectional validation study investigating the importance of explanatory models for improving the provision of mental health services, particularly for HIV-infected individuals. Explanatory models used by HIV-infected and uninfected individuals were elicited and compared to those of local health care providers. The relationships between these explanatory models, health seeking behaviour and coping strategies were investigated. The salient findings of this research are that patients without chronic illness, who are identified as having mental distress, express these symptoms through an array of somatic symptoms that they attribute to social disadvantage and strained family relationships. In contrast, those with chronic illnesses such as HIV attribute their experience of mental distress to the disease process. However, their symptoms are perpetuated by existing social circumstances and worry concerning the future. HIV ...
This species was previously listed as Extinct based on surveys in the 1980s that did not find any A. australis in the wild (Williams and Barnard 1988). Several surveys since this time have rediscovered small populations of A. australis (Doeg et al. 1996, Papas and Crowther 2007). Austrogammarus australis is listed as Vulnerable under the Victorian government Flora and Fauna Guarantee Act 1988. It has an extent of occurrence (EOO) of 35 km2, an area of occupancy (AOO) of 5 km2 and is found at a single location. It is categorised as Critically Endangered based on this highly restricted range, all of which is threatened by degradation of water quality through pollution and invasive species ...
A new model for the granite-pegmatite genetic relationships in the Kaluan-Azubai-Qiongkuer pegmatite-related ore fields, the Chinese Altay. NASA Astrophysics Data System (ADS). Zhang, Xin; Zhang, Hui; Ma, Zhan-Long; Tang, Yong; Lv, Zheng-Hang; Zhao, Jing-Yu; Liu, Yun-Long. 2016-07-01. Pegmatites commonly form in the waning stage of magma evolution by fractional crystallization of volatile-rich magmas and may be important host rocks of strategic metals (e.g., Li, Be, Cs, Ta, and Nb) and high-quality gem minerals. This study reports new zircon U-Pb dating results and Hf isotopic compositions of the KLA803 pegmatite, the AZB-01 pegmatite, the JMK-09 pegmatite (abbreviated as the K-A-J pegmatites) and the Halong granite from the Chinese Altay to determine the potential petrogenetic relationships between them. The geochronological data document that the K-A-J pegmatites were emplaced at 224.6 ± 2.3 Ma, 191.6 ± 2.0 Ma and 192.0 ± 2.3 Ma, respectively, and they are characterized by negative to low ...
Did some good proofreading today, all about parasites who affect the hosts behavior. Mostly not about humans. Mostly rats, mice, and crabs. Theres a parasite (Toxoplasma gondii) that needs to be in a rat/mouses body for part of its life cycle, then in a cats body for another. It affects the…
Manipulation of host behavior by parasites and pathogens has been widely observed, but the basis for these behaviors has remained elusive. Gypsy moths infected by a baculovirus climb to the top of trees to die, liquefy, and "rain" virus on the foliage below to infect new hosts. The viral gene that manipulates climbing behavior of the host was identified, providing evidence of a genetic basis for the extended phenotype.. ...
ഒരു പാന്തര്‍ പഫര്‍ (Takifugu pardalis ) . കൊടിയ വിഷമുള്ള ഒരു പഫര്‍ മത്സ്യമാണിത്. രസകരമായ വസ്തുത ഇവയ്ക്ക് വിഷ ഗ്രന്ഥികള്‍ ഇല്ല എന്നതാണ്‌. വിഷമുള്ള ബാക്റ്റീരിയയെ കണ്ടെത്തി, അതിനെ തിന്ന് വയറ്റില്‍ അവയെ വളര്‍ത്തുകയാണ്‌ ടാകിഫുഗുകള്‍ ചെയ്യുന്നത്. സയനൈഡിന്റെ ആയിരം മടങ്ങ് വീര്യമുള്ള വിഷമാണത്രേ അവ ഉത്പാദിപ്പിക്കുന്നത്. മറ്റു ജന്തുക്കള്‍ പിടിച്ചു തിന്നാന്‍ വന്നാല്‍ ഇവന്‍ സാധാരണ ...
Koch, A. (2011): Vergleichende Ökologie von Gammarus locusta und Echinogammarus marinus (Crustacea, Amphipoda) , Diplom thesis ...
Download and buy this stock image: Harvest Mouse Micromys minutus, climbing in reed, Bavaria - N99-1548391 from age fotostocks photo library of over 50+ million high resolution stock photos, stock pictures, videos and stock vectors
The Amphipoda (Latrielle 1816) are an order of the subphylum Crustacea, phylum Arthropoda. They can be found in the Class Malacostrata in most modern taxonomic schemes, even those in which the group Crustacea is treated as a phylum.. The word Amphipoda comes from two ancient Greek words, Amphi or Amphis mean on both sides and Poda meaning feet or legs. This refers to the fact that most Amphipods have both their thoracic and abdominal limbs in two different forms (grouped together by function), performing two different functions, for instance one group for swimming and one group for jumping. Amphipods in general are laterally compressed meaning they are a bit flattened from side to side, in effect they look a bit different to most other crustaceans which are either dorso-ventrally compressed (flattened top to bottom), or simply cylindrical. Most Amphipods are aquatic and will be dealt with in the section on Crustacea in the Invertebrates chapter. This small section is here because terrestrail ...
While this hybrid might appear in the wild, we only know of them definitively from two individuals living at Sea Life Park in Hawaii. Back in 1985 a female Bottlenose and a male False Killer Whale lived in the same tank, and were performers in the parks aquatic show. No one expected the 14ft Whale and 6ft Dolphin to mate, but the surprise result was Kekaimalu. She herself actually gave birth to a 3/4 Bottlenose offspring in 2005 (She had two previous calves, one died shortly after birth, and one lived till the age of 9). That makes Kekaimalu and Kawili Kai the only known captive Wholphins in the world ...
While this hybrid might appear in the wild, we only know of them definitively from two individuals living at Sea Life Park in Hawaii. Back in 1985 a female Bottlenose and a male False Killer Whale lived in the same tank, and were performers in the parks aquatic show. No one expected the 14ft Whale and 6ft Dolphin to mate, but the surprise result was Kekaimalu. She herself actually gave birth to a 3/4 Bottlenose offspring in 2005 (She had two previous calves, one died shortly after birth, and one lived till the age of 9). That makes Kekaimalu and Kawili Kai the only known captive Wholphins in the world ...
There has, nevertheless, been a leap in our understanding of parasitic manipulation over the past few years. Part of the advance has been due to recent developments in neuroscience and molecular technologies, and this special issue highlights these successes. However, it also demonstrates the need for a multi-disciplinary integration of studies concerning the molecular, biochemical and physiological aspects of infection with studies on the evolutionary, ecological and behavioural functions of host behavioural change.. How parasites manipulate their hosts is not an arcane topic, fascinating merely because it inspires the macabre (e.g. Schlozman, 2011). There are practical reasons for understanding how they exert their effects. Parasites are ubiquitous - and many have a predilection for the immunologically privileged site of the central nervous system because it shelters them from the full fury of the hosts immune system (Galea et al., 2007). However, this location also provides a parasite with ...
Amino acid analyses and peptide mapping were performed for the four main haemoglobins from the armoured catfish Pterygoplichthys pardalis; component I, which is functionally distinct from the others, is structurally unique, whereas components II, III and IV, functionally indistinguishable, are closely related in structure. Compositional difference indices are calculated for the four components and for the two major haemoglobins from the trout Salmo irideus, and the results are discussed in terms of structural relationships and evolutionary history of fish haemoglobins. ...
Among the many strategies employed by parasites for immune evasion and host manipulation, one of the most fascinating is molecular mimicry. With genome sequences available for host and parasite, mimicry of linear amino acid epitopes can be investigated by comparative genomics. Here we developed an in silico pipeline for genome-wide identification of molecular mimicry candidate proteins or epitopes. The predicted proteome of a given parasite was broken down into overlapping fragments, each of which was screened for close hits in the human proteome. Control searches were carried out against unrelated, free-living eukaryotes to eliminate the generally conserved proteins, and with randomized versions of the parasite proteins to get an estimate of statistical significance. This simple but computation-intensive approach yielded interesting candidates from human-pathogenic parasites. From Plasmodium falciparum, it returned a 14 amino acid motif in several of the PfEMP1 variants identical to part of the heparin
Technically no. But they do undergo periods of lessened brain activity similar to what we experience at sleep. They amass into colonies at night and have this collective period. There is this parasite called the liver lancet fluke which can thrive and reproduce in sheep. The prarsite lays eggs which pass out in the sheep excrement. Snails eat the excrement and within the snail the eggs hatch into parasite organisms. These pass out in the snail slime. Heres where the ants come in. Well, ants eat the slime, and in doing so become infected with the parasite. The parasite performs some sort of host manipulation - a mind control of sorts and causes the ant to react in an odd way. Every morning, just as the sun rises (nature has a beautiful drama) - the ant awakens from its lower brain power state - its sleep (not really, but...), before the other ants, and leaves the colony. The parasite seems to activate some suicidal tendency in the ant - it causes it to climb to the very top of grass blades, ...
Rabies virus (RABV) is an ancient, highly neurotropic rhabdovirus that causes lethal encephalitis. Most RABV pathogenesis determinants have been identified with laboratory-adapted or attenuated RABVs, but details of natural RABV pathogenesis and attenuation mechanisms are still poorly understood. To provide a deeper insight in the cellular mechanism of pathogenies of field RABV, this work was performed to assess virus strain specific differences in intra-neuronal virus transport, to identify cell culture adaptive mutations in recombinant field viruses and to explore shRNA-expressing RABVs as research tools for targeted host manipulation in infected cells. Comparison of chimeric RABVs with glycoprotein (G) ecto-domains of different lyssaviruses, together with field RABVs from dog and fox in dorsal root ganglion (DRG) neurons revealed no detectable differences in the axonal accumulation of the viruses. This indicates that previously described G-dependent transport of newly formed RABV in axons can ...
Amphipod crustacean (Socarnes vahlii). Amphipods are small crustaceans that typically have a laterally flattened body and fourteen limbs. They form part of the zooplankton: small, floating marine animals that are an important food source for many animals. - Stock Image C004/3950
Abstract: O presente trabalho teve por objetivo estudar a biologia e distribui o de Imparfinis minutus na microbacia do Ribeir o Grande (22o47′08′′S, 45o28′17′′W), serra da Mantiqueira oriental, nos períodos de julho e outubro de 2001 e janeiro e abril de 2002. Dentre as 37 espécies amostradas, I. minutus (Siluriformes, Heptapteridae) distribuiu-se desde o pediplano, até a planície do Vale do Paraíba, e esteve associada a ambientes pouco profundos, com substrato constituído principalmente por pedra, cascalho e matac o. O comprimento total dos indivíduos na popula o variou de 4,75 a 12,75 cm. A curva ajustada da rela o peso-comprimento para a popula o foi p = 0,0052 C3,13. Os fatores de condi o alométrico (Ka) e relativo (Kr) apresentaram tendências semelhantes, mostrandose baixos em julho, atingindo valores mais altos em abril. Com respeito à rela ogonadossomática (RGS) de fêmeas, os valores foram mais elevados em outubro e janeiro, o que sugere que a atividade ...
Coloured scanning electron micrograph (SEM) of Micrococcus antarcticus, psychrophilic (cold tolerant) bacterium. M. antarcticus was isolated in Antarctic pockets of very salty brine water surrounded by sea ice. M. antarcticus is a Gram-positive, aerobic, coccoid actinobacterium that can tolerate extremely cold water with temperatures as low as 0 degree centigrade. It is important in bioremediation, as it is capable of degrading sewage at low temperatures. Magnification: x5,335 when shortest axis printed at 25 millimetres. - Stock Image C032/1857
The major finding in this study is the observation that genetically obese (fa/fa) BNZ pups exhibited increased serum leptin levels, increased adiposity, and decreased energy expenditure before any detectable decrease in VMH serotonergic activity. Our previous analysis of 12-day-old Zucker pups indicated that VMH serotonergic activity (as indexed by 5-HIAA levels) was in fact lower in the obese (fa/fa) vs. homozygous lean (Fa/Fa) pups (45), but it was not possible to determine whether this change occurred before the onset of increased fat accretion. To address this, the present study was designed using BNZfa/faand +/+ littermates that could be distinguished at any age. Our data demonstrate that thefa/fapups increased their adiposity before any measurable decrement in VMH serotonergic activity. A significantly greater percent body fat was detectable in 7-day-oldfa/favs. +/+ pups, indicating that increased accretion of triacylglycerol in the adipocytes begins beforeday 7. In contrast, no ...
Recorded from coastal waters at sea. Lacustrine, at depths greater than 30 m, in Lake Ladoga commonly at 50-150 m (Ref. 59043). Specimens measuring 36-40 cm are more than 5 years old. Spawns for the first time at 4-6 years (Ref. 59043). Spawns from the end of November to 20 December (Ref. 593). Oviparous (Ref. 205). Eggs are buried in unguarded nests (Ref. 205). Feeds on benthic invertebrates, especially gammarids, molluscs and insect larvae (Ref. 59043). ...
Bluhm, B. A. , Brey, T. and Klages, M. (2001): The autofluorescent age pigment lipofuscin: key to age, growth and productivity of the Antarctic amphipod Waldeckia obesa (Chevreux, 1905) , Journal of experimental marine biology and ecology ...
Comments about Amphipod AirFlow Microstretch Belt Holders:. I was looking for something to carry my iPhone 6+ while I ran so that I could have music and track some stats. Armbands didnt work too well due to the size of the phone, but this belt worked PERFECTLY! Im able to fit my phone, ID, debit card, and a couple keys in the pouch with no problem. The elastic belt allows you to snug it down to minimize bouncing and stays comfortable during the run. The mesh is a bit see through, so I was able to screen texts while running to see if I needed to respond. But because of this, I cant see it being too waterproof/resistant. Not too much of a problem however, if you wear it under a light jacket. ...
For the past 10 years, the West Campus Sports Council has served as the primary sports care provider at the Sea Otter Classic, a four-day annual event that brings nearly 10,000 world-class competitors to Monterey, Calif., for what is regarded as the worlds premier cycling festival. During the decade of Sports Council care at the Sea Otter, West Campus faculty member and Sports Council clinician Mehdi Moossavi, D.C., CCSP (West 92), has participated as a clinician each day at every event. Dr. Moossavi was recently honored for his "decade of dedication," and was presented with a plaque in recognition of his "exemplary dedication to excellence." "I was honored to receive the award," says Dr. Moossavi, who has served as a Sports Council clinician at many events since his 1993 appointment to the West Campus faculty. "I take enormous pride in serving as one of the most active Sports Council clinicians. Although we had great enthusiasm and confidence in the beginning (1994), I could not have imagined ...
I explore the interactions between behaviour and physiology, using invertebrate model systems. For example, I study how and why animals change their behaviour due to infection. In some cases the change in behaviour is produced by the host to help it overcome its infection, in some cases the pathogen manipulates the hosts behaviour for its own ends. I also study how and why immune function is influenced by factors such as stress and reproduction. The ability to resist disease is partly determined by behaviour. We use a range of techniques including behavioural studies, physiological methods, biochemical assays (e.g. HPLC) and molecular techniques ...
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DirtBaggies is seeking staff to work at our Sea Otter Booth, April 18-21. Retail experience and an undying devotion to the benefits of bibs, would be
Thinking about signing up for the circuit race at Sea Otter this year but wanted to hear some opinions about the circuit race prior to registration.
The annual Sea Otter Classic opened in Monterey, California yesterday. BikeRadars technical editor James Huang took a stroll around the
Im standing in the shade near the GT Bicycles booth at the 2017 Sea Otter Classic when I turn around and see an old guy performing crazy flatland tricks on a 90s GT Zasker mountain bike with 3 spoke nylon wheels. A beat after he says something in German-accented English, I suddenly realize Im standing read more ». ...
Define bamboo powder-post beetle: an auger beetle (Dinoderus minutus) that is blackish with yellow markings on the elytra, green on the thorax, and…
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Photo/image Raccoon Dog (Nyctereutes procyonoides), Family: Canidae. Location Vildtfarm Nord. Photographer: JC Schou, Photoid 18226
The false killer whale and short-finned pilot whale are two of the cetacean species that have been observed taken by the longline fishery that operates in the central Pacific, and using our best available data, the false killer whale has been identified as a strategic stock (Nitta and Henderson, 1993; Carretta et al., 2004). Both species are largely pelagic in distribution and are found in tropical and temperate waters of all ocean basins. We have been using the mitochondrial. DNA control region sequences to examine population structure. Our preliminary results show that for both species, the animals sampled around the Hawaiian Islands are separate, reproductively isolated populations and have likely been isolated from animals living in the eastern tropical Pacific for a long time. The data for short-finned pilot whales also suggest additional structure within the eastern tropical Pacific, and that neither species has a strictly matrilineal pod structure.. ...
Habitat fragmentation can promote patches of small and isolated populations, gene flow disruption between those populations, and reduction of local and total genetic variation. As a consequence, these small populations may go extinct in the long-term. The ocelot (Leopardus pardalis), originally distributed from Texas to southern Brazil and northern Argentina, has been impacted by habitat fragmentation throughout much of its range. To test whether habitat fragmentation has already induced genetic differentiation in an area where this process has been documented for a larger felid (jaguars), we analyzed molecular variation in ocelots inhabiting two Atlantic Forest fragments, Morro do Diabo (MD) and Iguaçu Region (IR). Analyses using nine microsatellites revealed mean observed and expected heterozygosity of 0.68 and 0.70, respectively. The MD sampled population showed evidence of a genetic bottleneck under two mutational models (TPM = 0.03711 and SMM = 0.04883). Estimates of genetic structure (FST = 0
There is a limited amount of data on comparisons of home range sizes estimated by VHF radio telemetry and GPS tracking. In the present study, the sizes of winter home ranges determined by GPS averaged 5.3 km2 (K95%) and the core areas 1.3 km2. These estimates were similar or higher than previous measurements conducted with VHF radio telemetry in Finland during the snow-free season (K95%: 1.0-3.9 km2; K50/60%: 0.2-0.7 km2; [5, 60-63]) and in winter (K95%: 3.7 km2; K50%: 0.5 km2; [5]). In a New Zealand study, Recio et al.[64] determined the home range size of feral cats (Felis catus) with GPS and compared it to results obtained by radio telemetry. They concluded that the home range sizes were of a similar magnitude or higher when using GPS. Furthermore, Medri & Mourão [65] reported for the giant anteater (Myrmecophaga tridactyla) that a home range recorded with GPS over 9 days could be larger than a range obtained with VHF tracking over 252 days. These data support our results showing similar or ...
Some parasites may modify the behavior of their hosts. Altered behaviors may: 1) benefit the host in that they defend against the pathogen, 2) benefit the pathogen and represent manipulations of the host response, and 3) benefit neither the host or the pathogen and simply be a product of the host response to infection. In this thesis I examine four host/parasite systems. For each system, I explore host/parasite behavioral interactions, and examine them with regard to selective pressures that may be acting on both the host and the parasite. I test the Hamilton and Zuk hypothese in 26 species of lizards. I find an inverse relationship between a lizard species brightness and parasite prevalence. My result lend credence to criticisms of the Hamilton and Zuk Hypothesis. If infection does occur, animals may alter their behavior to impair the growth and reproduction of the parasite. To test this prediction, I examine behavioral thermoregulation in two strains of the snail Biomphalaria glabrata, one ...
Sweden is bracing for an amphibious assault by a considerable force of raccoon dogs and raccoons, poised to cross the Öresund strait which separates the country from neighbouring Denmark.. Raccoon dogs (Nyctereutes procyonoides) are native to east Asia, where their populations are actually declining, but they have made themselves right at home across Scandinavia and continental Europe. Raccoons (Procyon lotor) are native to North America.. The raccoon dog was introduced into Latvia in the 1940s, and rapidly invaded neighbouring countries, penetrating as far south as Italy.. Two breeding pairs of raccoons were released outside Kassel, Germany, in 1934, with the authorisation of Hermann Görings Reich Forestry Office, with spectacular results. The country now hosts a population of up a million, and another release from an US airbase in France in the 1960s gave the animals another vital base of operations.. Denmark has already fallen to both species, and the Swedes now fear they will make the ...
Corynosoma obtuscens Lincicome, 1943 Acanthocephala Polymorphidae in Canis familiaris from Chincha City, Peru Corynosoma...  Corynosoma obtuscens Lincicome, 1943 Acanthocephala Polymorphidae in Canis familiaris from Chincha City, Peru Corynosoma...
1943 Acanthocephala Polymorphidae en Canis familiaris de la ciudad de Chincha, Peru ... 1943 Acanthocephala Polymorphidae in Canis familiaris from Chincha City, Peru Corynosoma obtuscens Lincicome, ... Cabrera, R..; Rojas, R..; Davalos, M.., 1999: Corynosoma obtuscens Lincicome, 1943 Acanthocephala Polymorphidae in Canis ... Corynosoma obtuscens Lincicome, 1943 Acanthocephala Polymorphidae in Canis familiaris from Chincha City, Peru Corynosoma ...
more infohttps://eurekamag.com/research/038/107/038107027.php
Rotifer - Simple English Wikipedia, the free encyclopedia  Rotifer - Simple English Wikipedia, the free encyclopedia
The Acanthocephala[change , change source]. The Acanthocephala, a group of parasitic worms previously considered to be a ...
more infohttps://simple.wikipedia.org/wiki/Rotifers
PLOS ONE: accelerating the publication of peer-reviewed science  PLOS ONE: accelerating the publication of peer-reviewed science
... or Bdelloidea and Acanthocephala as sister taxa (Lemniscea). Both outgroup choice and method of inference affected the ... and the phylum Acanthocephala are inconclusive. In particular, Bdelloidea lacks molecular-based phylogenetic appraisal. I ... Acanthocephala). With additional sequences taken from previously published mitochondrial genomes, the total dataset included ...
more infohttp://journals.plos.org/plosone/article/citation?id=10.1371/journal.pone.0043554
Acanthocephala  Acanthocephala
... spiny-headed worms, thorny-headed worms. Click on an image to view larger version & data in a new window ... Phylogenetic relationships of Acanthocephala based on analysis of 18S ribosomal RNA gene sequences. Journal of Molecular ... Acanthocephala. Pages 299 332 in: Microscopic Anatomy of Invertebrates Vol. 4, F. W. Harrison, ed., Wiley-Liss. ... Pages 22 71 in: Biology of the Acanthocephala. B. B. Nickol and D. W. T. Crompton, eds. Cambridge University Press, Cambridge. ...
more infohttp://tolweb.org/Acanthocephala
Acanthocephala  Acanthocephala
... spiny-headed worms, thorny-headed worms. Click on an image to view larger version & data in a new window ... Phylogenetic relationships of Acanthocephala based on analysis of 18S ribosomal RNA gene sequences. Journal of Molecular ... Acanthocephala. Pages 299 332 in: Microscopic Anatomy of Invertebrates Vol. 4, F. W. Harrison, ed., Wiley-Liss. ... Pages 22 71 in: Biology of the Acanthocephala. B. B. Nickol and D. W. T. Crompton, eds. Cambridge University Press, Cambridge. ...
more infohttp://tolweb.org/tree?group=Acanthocephala&contgroup=Pseudocoelomates
Acanthocephala : Wikis (The Full Wiki)  Acanthocephala : Wikis (The Full Wiki)
Acanthocephala. References. *Amin, O.M. 1987: Key to the families and subfamilies of Acanthocephala with the erection of a new ... Acanthocephala. *(taxonomy) A taxonomic phylum within the superphylum Protostomia - intestinal worms, having the proboscis ... The Acanthocephala (Greek akanthos, thorn + kephale, head) are a group of parasitic worms. They may be called known as ... The Acanthocephala (Greek ακανθος, akanthos, thorn + κεφαλη, kephale, head) is a phylum of parasitic worms known as ...
more infohttp://www.thefullwiki.org/Acanthocephala
Acanthocephala declivis - Wikipedia  Acanthocephala declivis - Wikipedia
Acanthocephala declivis is a species of North American true bugs with a range from the southern United States to Guatemala and ... which is not present in other Acanthocephala species within its range. Blatchley, W. S. (1926). Heteroptera of Eastern North ...
more infohttps://en.wikipedia.org/wiki/Acanthocephala_declivis
Acanthocephala (bug) - Wikipedia  Acanthocephala (bug) - Wikipedia
Acanthocephala is a New World genus of true bugs in the family Coreidae. The name is derived from the Greek akanth- meaning " ... "genus Acanthocephala Laporte, 1833". Coreoidea Species File Online. Retrieved 2013-10-17. Yonke (15 May 1969). "Description of ... The known species of Acanthocephala are: A. affinis (Walker, 1871) A. alata (Burmeister, 1835) A. angustipes (Westwood, 1842) A ... Review of Acanthocephala (Hemiptera: Heteroptera: Coreidae) of America north of Mexico with a key to species. Zootaxa 2835: 30- ...
more infohttps://en.wikipedia.org/wiki/Acanthocephala_(bug)
Canary Database: Browse by Outcome: Acanthocephala  Canary Database: Browse by Outcome: Acanthocephala
Browse by Outcome: Acanthocephala (1 article). % of records by year: 1965 2017 ...
more infohttp://canarydatabase.org/browse/outcome/881
Natural History Collections: Acanthocephala  Natural History Collections: Acanthocephala
PHYLUM ACANTHOCEPHALA The endoparasitic thorny-headed worms (1150 species) require two hosts to complete the life cycle. The ...
more infohttp://www.nhc.ed.ac.uk/index.php?page=24.25.312.316.333.372
Characterization of the complete mitochondrial genome of Brentisentis yangtzensis Yu & Wu, 1989 (Acanthocephala, Illiosentidae)  Characterization of the complete mitochondrial genome of Brentisentis yangtzensis Yu & Wu, 1989 (Acanthocephala, Illiosentidae)
The mitogenome of Brentisentis yangtzensis is 13,864 bp in length and has the circular structure typical of metazoans. It contains 36 genes: 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and 12 protein-encoding genes (PCGs). All genes are transcribed from the same strand. Thirteen overlapping regions were found in the mitochondrial genome. The overall A+T content of B. yangtzensis is 68.3% versus 31.7% of G+C content (A = 27.8%, T = 40.5%, C = 9.0%, G = 22.7%). B. yangtzenensis (Illiosentidae) and Leptorhynchoides thecatus (Rhadinorhynchidae) form a sister clade, showing the relatively close relationship between the Illiosentidae and the Rhadinorhynchidae. The mitochondrial gene arrangements of acanthocephalan species are relatively conserved, with only a few translocations of tRNAs (trnS1, trnS2, trnV, and trnK) detected. An identical gene order was found both in a sister clade (Centrorhynchus aluconis and Plagiorhynchus transversus) and across different classes (B. yangtzensis
more infohttps://zookeys.pensoft.net/article/34809
A case of Moniliformis moniliformis (Acanthocephala) infection in Iran  A case of Moniliformis moniliformis (Acanthocephala) infection in Iran
Records of Acanthocephala infections in human are rare, but cases of infections by 7 different species have been reported ( ... Only a few cases of Acanthocephala infections have been reported in humans, and Moniliformis moniliformis is the most common ... Altered behavior in two species of blattid cockroaches infected with Moniliformis moniliformis (Acanthocephala). J Parasitol. ... Taraschewski H. In Baker JR, Muller R, Rollinson D eds, Host-parasite interaction in Acanthocephala: a morphological approach. ...
more infohttp://parasitol.kr/journal/view.php?doi=10.3347/kjp.2007.45.2.145
Organisation of the praesoma in Acanthocephalus anguillae (Acanthocephala, Palaeacanthocephala) with special reference to the...  Organisation of the praesoma in Acanthocephalus anguillae (Acanthocephala, Palaeacanthocephala) with special reference to the...
The study was compiled to add new data to the ground pattern of the Acanthocephala for analysis of the phylogenetic ... anguillae can be assumed as ground-pattern characteristics of the Acanthocephala. ... Acanthocephala): Corynosoma cetaceum as an exceptional case of phenotypic variability. *Francisco Javier Aznar, Enrique Crespo ... Morphology of the presoma of Corynosoma hamanni (Acanthocephala: Polymorphidae).. *Brent B. Nickol, H L Holloway ...
more infohttps://www.semanticscholar.org/paper/Organisation-of-the-praesoma-in-Acanthocephalus-to-Herlyn-Ehlers/c260077d8ef3322c688a54e9ca0bc3fd9094743f
Prevalence, intensity, and exposed variables of infection with Acanthocephala parasites of the gastrointestinal tract of...  Prevalence, intensity, and exposed variables of infection with Acanthocephala parasites of the gastrointestinal tract of...
Prevalence and mean intensity of Acanthocephala infection significantly increased as the length of fish increased (χ2 = 14.001 ... It is clear from Table 2 that the overall prevalence and mean intensity of Acanthocephala infection were 16.30% (12.94-20.31) ... In summary, the key findings of this study show that the overall prevalence and mean intensity of Acanthocephala infection were ... Prevalence and mean intensity of Acanthocephala infection significantly increased as the length of fish increased (χ2 = 14.001 ...
more infohttps://basicandappliedzoology.springeropen.com/articles/10.1186/s41936-018-0042-6
Polyacanthorhynchus  Polyacanthorhynchus
Key to the families and subfamilies of Acanthocephala with the erection of a new class (Polyacanthocephala) and a new order ( ... analysis based on 18S ribosomal RNA gene sequences supports the existence of class polyacanthocephala (acanthocephala). ...
more infohttp://www.tolweb.org/Polyacanthocephala/68546
Search Results - AccessScience from McGraw-Hill Education  Search Results - AccessScience from McGraw-Hill Education
Acanthocephala. A distinct phylum of helminths (parasitic worms), commonly known as the spiny- or thorny-headed worms. The ... phylum Acanthocephala comprises three classes: Archiacanthocephala, Palaeacanthocephala, and Eoacanthocephala (a suggested ...
more infohttps://www.accessscience.com/search?amp%3BrootID=794558&start=0&%3Bstart=0&%3Bamp%3Bstart=0&%3Bamp%3BsearchStr=Marine+ecology&%3Btopics=Paleontology&%3Btopics=Psychiatry+%26+Psychology&types=Image&types=Article&%3Bamp%3Btopics=Earth+Science&%3Bamp%3Brows=25&rows=25
Search Results - AccessScience from McGraw-Hill Education  Search Results - AccessScience from McGraw-Hill Education
Acanthocephala. A distinct phylum of helminths (parasitic worms), commonly known as the spiny- or thorny-headed worms. The ... phylum Acanthocephala comprises three classes: Archiacanthocephala, Palaeacanthocephala, and Eoacanthocephala (a suggested ...
more infohttps://www.accessscience.com/search?amp%3BrootID=794558&topics=Food+Science+%26+Technology&topics=Health+Sciences&start=0&%3Bstart=0&%3Bamp%3Bstart=0&%3Btopics=Paleontology&%3Bamp%3BsearchStr=Marine+ecology&%3Bamp%3Brows=25&%3Bamp%3Btopics=Earth+Science&%3Btypes=Image
Overview of Lab 5  Overview of Lab 5
Lab 5: Diversity: Monogenea and Acanthocephala. Overview. The Monogenea is the second major class of flukes. The monogeneans ... Some older references place the Acanthocephala and Nematoda in the same phylum, Nemathelminthes, based on the presence of a ...
more infohttp://www.biology.ualberta.ca/parasites/ParPub/text/text/overl05t.htm
Acanthocephalid | Article about acanthocephalid by The Free Dictionary  Acanthocephalid | Article about acanthocephalid by The Free Dictionary
Acanthocephala. (redirected from acanthocephalid). Also found in: Dictionary, Thesaurus, Medical. Acanthocephala. A distinct ... Acanthocephala. [ə‚kan·thō′sef·ə·lə] (invertebrate zoology) The spiny-headed worms, a phylum of helminths; adults are parasitic ... Female Acanthocephala are unique in that the ovary exists as a distinct organ only in the very early stages of development and ... Acanthocephala. a class of parasitic invertebrates of the phylum Nemathelminthes that inhabit the intestine of vertebrates. The ...
more infohttps://encyclopedia2.thefreedictionary.com/acanthocephalid
  • The fact that larval development occurs in arthropods gives support to the postulation that the ancestors of Acanthocephala were parasites of primitive arthropods during or before the Cambrian Period and became parasites of vertebrates as this group arose and utilized arthropods for food. (thefreedictionary.com)