Artifical sand replenishments are globally used as innovative coastal protection measures. In these replenishments elevated pore water concentrations of trace elements are found. This study investigated possible ecotoxicological risks at two intertidal depositional sites, the Sand Engine (SE) as a recent innovative Dutch coastal management project, and a semi-artificial tidal ... read more flat (TF). Using the Sediment Quality Triad approach, we considered three major lines of evidence (LoE): geochemical characterization, toxicity characterization using bioassays with the estuarine amphipod Corophium volutator and ecological field survey. In both depositional areas C. volutator is at risk: moderate (SE) and low (TF). For TF, the bioavailability of trace elements differs between the field site and the laboratory. Contamination from arsenic and copper is present, but the low survival rate of C. volutator from the bioassay suggests presence of additional contaminations. The highly morphological ...

We compared feeding rates of the well-established, non-invasive amphipod Gammarus roeselii with those of the invasive Dikerogammarus villosus at different prey densities and different temperatures in laboratory experiments using chironomid larvae as prey. Feeding rates were very variable in both species but higher in the invader species than in the well-established non-invasive species. These results were age independent. At high temperature (18-20 °C) and high prey density (≥1000 prey m-2) one large adult D. villosus consumed 6-9 prey day-1 on average while one G. roeselii consumed 4-7 prey d-1 and one smaller D. villosus of a length of 8-10 mm consumed 2-5 prey d-1 while one G. roeselii of the same length consumed 3 prey d-1. Predation rate decreased considerably from high (18-20 °C) to low temperature (3±2 °C), from 9 to 4 prey predator-1 d-1 in D. villosus and from 7.5 to 2.5 prey predator-1 d-1 in G. roeselii. We conclude that both gammarids consumed a biomass in the range of 1/2 to ...

Freshwater impoundments at Savannah National Wildlife Refuge (NWR), South Carolina, provide an important habitat for wildlife species, but degraded sediment quality in the Savannah River downstream of the discharge from two impoundments have caused concern about potential contaminant problems within the impoundments. The quality of sediments from five impoundments (impoundments no. 1, 2, 6, 7, and 17) on the NWR was evaluated using physical and chemical characterization, contaminant concentrations (metals, organochlorine pesticides, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons), and toxicity testing. Survival of Hyalella azteca (freshwater amphipod) exposed for 28 days to solid-phase sediments was not significantly different from controls, but growth was significantly decreased at several sites. Survival in 96-hour exposures to sediment pore water was significantly decreased at most sites. Factors contributing to the toxic responses were low pH (3.7 to 4.1), ammonia (20 mg/L), and

Twenty-one species of acanthocephalans, representative of thirteen genera from ten families of seven orders and three classes, are included in this updated checklist of acanthocephalans in South Africa. Although South Africa appears to have a less diverse acanthocephalan fauna compared to some other countries such as Iran in Asia, or Brazil in South America, this is probably an artefact of fewer parasitological surveys.

Hossain, M.B. & Hughes, L.E. 2016. New species Victoriopisa bruneiensis and Apocorophium acutum (Chevreux, 1908) from Brunei (Crustacea: Peracarida: Amphipoda). Zootaxa 4117(3): 375-386. doi: 10.11646/zootaxa.4117.3.5. reference page ...

Wenzel MA, Douglas A, James MC, Redpath SM, Piertney SB (2016) The role of parasite-driven selection in shaping landscape genomic structure in red grouse (Lagopus lagopus scotica). Mol Ecol, 25, 324-341. Piertney SB, Black A, Watt L, Christie D, Poncet S, Collins MA(2016) Resolving patterns of population genetic and phylogeographic structure to inform control and eradication initiatives for brown rats Rattus norvegicus on South Georgia. Journal of Applied Ecology, 53, 332-339.. Eustace RM, Ritchie H, Kilgallen NM, Piertney SB, Jamieson AJ (2016) Morphological and ontogenetic stratification of abyssal and hadal Eurythenes gryllus sensu lato (Amphipoda: Lysianassoidea) from the Peru-Chile Trench. Deep Sea Research Part I: Oceanographic Research Papers, 109, 91-98.. Gavan MK, Oliver MK, Douglas A, Piertney SB (2015) Gene dynamics of toll-like receptor 4 through a population bottleneck in an insular population of water voles (Arvicola amphibius). Cons Gen, 16, 1181-1193.. Meyer-Lucht Y, Mulder KP, ...

Lowry, J. (2017). Acanthostepheia behringiensis carica Dementieva, 1931. In: Horton, T.; Lowry, J.; De Broyer, C.; Bellan-Santini, D.; Coleman, C. O.; Corbari, L.; Daneliya, M.; Dauvin, J-C.; Fišer, C.; Gasca, R.; Grabowski, M.; Guerra-García, J. M.; Hendrycks, E.; Hughes, L.; Jaume, D.; Jazdzewski, K.; Kim, Y.-H.; King, R.; Krapp-Schickel, T.; LeCroy, S.; Lörz, A.-N.; Mamos, T.; Senna, A. R.; Serejo, C.; Sket, B.; Souza-Filho, J. F.; Tandberg, A.H.; Thomas, J.; Thurston, M.; Vader, W.; Väinölä, R.; Vonk, R.; White, K.; Zeidler, W. (2017). World Amphipoda Database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546977 on 2017-12- ...

Acanthodii (8) Acanthomorpha (17) Acanthomorphata (10) Acariformes (10) Acaromorpha (17) Acoela (2) Actinobacteria (1) Actinopteri (17) Actinopterygii (15) Aculeata (26) Adephaga (8) Aequorlitornithes (2) Aetogate (2) Agaonidae (1) Agoniatitina (2) Aleocharinae (1) Alismatanae (4) Allotriocarida (7) Alveolata (14) Amaurobioidea (1) Ammonoidea (4) Amoebozoa (9) Amorphea (17) Amphipoda (1) Anabantiformes (1) Angiospermae (36) Anguilliformes (1) Angusteradulata (2) Animalia (102) Annelida (13) Anomalogonatae (16) Anthophila (5) Antliophora (14) Anura (2) Anystides (1) Anystina (1) Apiales (2) Apiformes (1) Apo-Tracheophyta (3) Apocrita (29) Apoditrysia (2) Apoidea (12) Apoikozoa (6) Apotracheophyta (7) Arachnida (87) Araneae (18) Araneida (1) Araneomorphae (17) Archaea (3) Archaeobranchia (1) Archaeognatha (1) Archosauria (10) Archosauromorpha (9) Archostemata (2) Arthropoda (60) Artiopoda (1) Ascomycota (14) Asgard (14) Asioryctitheria (39) Asparagales (7) Assamioidea (1) Asteiidae (1) Asteraceae ...

Acanthodii (8) Acanthomorpha (17) Acanthomorphata (9) Acariformes (9) Acaromorpha (17) Acoela (2) Actinobacteria (1) Actinopteri (17) Actinopterygii (15) Aculeata (25) Adephaga (8) Aequorlitornithes (2) Aetogate (2) Agaonidae (1) Agoniatitina (1) Aleocharinae (1) Alismatanae (4) Allotriocarida (5) Alveolata (14) Amaurobioidea (1) Ammonoidea (3) Amoebozoa (9) Amorphea (14) Amphipoda (1) Anabantiformes (1) Angiospermae (35) Anguilliformes (1) Angusteradulata (2) Animalia (102) Annelida (12) Anomalogonatae (16) Anthophila (5) Antliophora (14) Anura (1) Anystides (1) Anystina (1) Apiales (1) Apiformes (1) Apo-Tracheophyta (3) Apocrita (28) Apoditrysia (1) Apoidea (11) Apoikozoa (6) Apotracheophyta (7) Arachnida (87) Araneae (18) Araneida (1) Araneomorphae (17) Archaea (3) Archaeobranchia (1) Archaeognatha (1) Archosauria (10) Archosauromorpha (9) Archostemata (2) Arthropoda (59) Artiopoda (1) Ascomycota (13) Asgard (10) Asioryctitheria (39) Asparagales (7) Assamioidea (1) Asteiidae (1) Asteraceae ...

Artemia Cysts Blood Worms Gammarus Aquarium Fish Food - Browse fuzing.com to find artemia cysts blood worms gammarus aquarium fish food sellers, suppliers, wholesalers, companies, manufacturers, exporters, factories.

Arifin, Zainal, Rahma Puspitasari, and Nobuyuki Miyazaki. 2012. Heavy Metal Contamination in Indonesian Coastal Marine Ecosystems: A Historical Perspective. Coastal Marine Science 38 (1): 227-33. ASTM. 2006. Standard Guide for Conducting Static Acute Toxicity Tests Starting with Embryos of Four Species of Saltwater Bivalve Molluscs. In Annual Book of ASTM Standards 2006. Section Eleven : Water and Environmental Technology. Volume 11.06 Biological Effects and Environmental Fate; Biotechnology, 58-78. Bat, Levent, and Dave Raffaelli. 1998. Sediment Toxicity Testing: A Bioassay Approach Using the Amphipod Corophium Volutator and the Polychaete Arenicola Marina. Journal of Experimental Marine Biology and Ecology 226 (2): 217-39. doi:10.1016/S0022-0981(97)00249-9. Boonyatumanond, Ruchaya, Areerat Jaksakul, Pornthip Puncharoen, and Monthip Sriratana Tabucanon. 2002. Monitoring of Organochlorine Pesticides Residues in Green Mussels (Perna Viridis) from the Coastal Area of Thailand. ...

The oxygen hypothesis, proposed by Chapelle and Peck (Chapelle and Peck, 1999), states that polar gigantism stems from high oxygen availability coupled with low metabolic rates. The authors surveyed maximum body sizes in collections of amphipod crustaceans from different habitats, finding that the size of giants in each locality - defined as the largest 5% of species in each habitat - correlated strongly with potential oxygen availability determined from water temperature (Fig. 5). They concluded that maximum potential size is limited by oxygen availability. The oxygen hypothesis has received considerable attention (see McClain and Rex, 2001; Chapelle and Peck, 2004; Woods and Moran, 2008; Woods et al., 2009; McClain and Boyer, 2009; Klok et al., 2009; Verberk and Bilton, 2011; Verberk et al., 2011) and also considerable support in some taxa, particularly amphipods (e.g. Chapelle and Peck, 2004). Moreover, there is a substantial subset of literature suggesting that atmospheric O2 and ...

You searched for: All Fields ((conservation effect OR conservation effects assessment project OR conservation effects assessment program OR ceap) AND (evaluat OR assess)) Remove constraint All Fields: ((conservation effect OR conservation effects assessment project OR conservation effects assessment program OR ceap) AND (evaluat OR assess)) Format Electronic Remove constraint Format: Electronic Topic agricultural research Remove constraint Topic: agricultural research ...

TY - JOUR. T1 - Finfish and aquatic invertebrate pathology resources for now and the future. AU - Spitsbergen, Jan M.. AU - Blazer, Vicki S.. AU - Bowser, Paul R.. AU - Cheng, Keith C.. AU - Cooper, Keith R.. AU - Cooper, Timothy K.. AU - Frasca, Salvatore. AU - Groman, David B.. AU - Harper, Claudia M.. AU - Law, Jerry M.(Mac). AU - Marty, Gary D.. AU - Smolowitz, Roxanna M.. AU - St. Leger, Judy. AU - Wolf, Douglas C.. AU - Wolf, Jeffrey C.. PY - 2009/3. Y1 - 2009/3. N2 - Utilization of finfish and aquatic invertebrates in biomedical research and as environmental sentinels has grown dramatically in recent decades. Likewise the aquaculture of finfish and invertebrates has expanded rapidly worldwide as populations of some aquatic food species and threatened or endangered aquatic species have plummeted due to overharvesting or habitat degradation. This increasing intensive culture and use of aquatic species has heightened the importance of maintaining a sophisticated understanding of pathology of ...

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F1736-09(2016) Standard Guide for Irradiation of Finfish and Aquatic Invertebrates Used as Food to Control Pathogens and Spoilage Microorganisms irradiation facilities~ pathogens~ aquatic invertebrates~ finfish~

Article Bioaccumulation of petroleum hydrocarbons in arctic amphipods in the oil development area of the Alaskan Beaufort Sea. An objective of a multiyear ...

1. Sodium uptake and loss rates are given for three gammarids acclimatized to media ranging from fresh water to undiluted sea water.. 2. In Gammarus zaddachi and G. tigrinus the sodium transporting system at the body surface is half-saturated at an external concentration of about 1 mM/l. and fully saturated at about 10 mM/l. sodium. In Marinogammarus finmarchicus the respective concentrations are six to ten times higher.. 3. M. finmarchicus is more permeable to water and salts than G. zaddachi and G. tigrinus. Estimated urine flow rates were equivalent to 6.5% body weight/hr./ osmole gradient at 10°C. in M. finmarchicus and 2.8% body weight/hr./osmole gradient in G. zaddachi. The permeability of the body surface to outward diffusion of sodium was four times higher in M. finmarchicus, but sodium losses across the body surface represent at least 50% of the total losses in both M. finmarchicus and G. zaddachi.. 4. Calculations suggest that G. zaddachi produces urine slightly hypotonic to the blood ...

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Ritchie , H , Jamieson , A J & Piertney , S B 2016 , Isolation and Characterization of Microsatellite DNA Markers in the Deep-Sea Amphipod Paralicella tenuipes by Illumina MiSeq Sequencing , Journal of Heredity , vol. 107 , no. 4 , pp. 367-371 . https://doi.org/10.1093/jhered/ ...

A comparative approach was taken in this study to evaluate androgen (androstenedione and testosterone) metabolism in three invertebrate species: the gastropod Marisa cornuarietis, the amphipod Hyalella azteca, and the echinoderm Paracentrotus lividus. The existence of 17β/3β-hydroxysteroid dehydrogenase (HSD) and 5α-reductase catalyzed reactions was demonstrated in all three species. Androstenedione was primarily converted to 5α-androstanedione in M. cornuarietis, while it was primarily metabolized to testosterone in P. lividus and H. azteca. In addition, and consistent with vertebrate findings, tissue specific pathways and sexual dimorphism in androgen metabolism were observed. Namely, testosterone was metabolized to dihydrotestosterone in P. lividus gonads (via 5α-reductase), and metabolized to 4-androstene-3β,17β-diol in the digestive tube (via 3β-hydroxysteroid dehydrogenase). Furthermore, the synthesis of 17β-reduced metabolites of androstenedione (testosterone and ...

Survival in hypoxia, oxygen-limitation of respiration and effects of hypoxia on precopulatory mate-guarding behavior of the amphipod, Gammarus pseudolimnaeus, were tested to determine if seasonal hypoxia in Lake Taneycomo could be a limiting factor for amphipods in the lake. Currently, the Army Corps of Engineers uses oxygenation procedures at Table Rock Dam to defend 4.0 ppm dissolved oxygen (D.O.) in water entering Lake Taneycomo. However, little information exists to indicate whether this level of oxygenation is sufficient for survival, growth, and reproduction of G. pseudolimnaeus. Male, female, and juvenile amphipods survived 48 hours exposure to dissolved oxygen below the minimum daily average that is currently defended in the lake. Survival of hypoxia below 3.5 ppm was differed among genders and age with females being most sensitive, and juveniles being least sensitive. Sensitivity to hypoxia increased with an increase in temperature. Respiration of adult G. pseudolimnaeus was found to be oxygen

Understanding how intra-specific differences in plant traits mediate vulnerability to herbivores of relevant habitat-forming plants is vital to attain a better knowledge on the drivers of the structure and functioning of ecosystems. Such studies, however, are rare in seagrass-mesograzer systems despite the increasingly recognized relevance of mesograzers as seagrass consumers. We investigated the role and potential trade-offs of multiple leaf traits in mediating the vulnerability of the seagrass Zostera noltei to different mesograzer species, the amphipod Gammarus insensibilis and the isopod Idotea chelipes. We worked with plants from two different meadows for which contrasting chemical and structural traits were expected based on previous information. We found that plants with high vulnerability to mesograzers (i.e. those preferred and subjected to higher rates of leaf area loss) had not only higher nitrogen content and lower C:N, fibre, and phenolics, but also tender and thinner leaves. No ...

Ph.D. Auckland University. Research Focus: Invertebrate Ecology, Invasive Species Ecology. Office: DK 3024 and PSC 3113. Phone: 703-993-5956. E-mail: Click Here. Dr. Fowlers general research interests and experiences include global aquatic invertebrate species patterns, biodiversity, phenotypic plasticity, parasitology, and community and population level interactions of aquatic invertebrates, especially those concerning invasions. She has experience working in freshwater, estuarine, and marine systems both in the United States and globally. Currently, her laboratory at GMU has three main topics of study: host-parasite interactions, invasion dynamics and processes, and natural resource management of commercially and recreationally important aquatic invertebrate species.. Dr. Fowler teaches courses in Aquatic Invertebrate Ecology and Marine Ecology at the graduate and undergraduate level. She holds an adjunct position at the College of Charleston and is a research associate with the Smithsonian ...

Book now at Sol Azteca Restaurant in Boston, explore menu, see photos and read 440 reviews: Sol Azteca exceeded every expectation. Delicious food, attentive service and quite possibly the best margaritas in Boston.

http://www3.sympatico.ca/azcc/IAzHA.html. About the Breed. The Azteca is the National Horse of Mexico and is the first breed to be developed in Mexico. Until recently the majority of horses in Mexico were descendants of Spanish horses, such as the Galice?o, or imports from Spain or Portugal. The Spanish horse has always been favored in Mexico and the Andalusian was the foundation of the new breed.. Breeding the Azteca began in 1972 by crossing the Andalusian and American Quarter Horse, and some crosses were made between Andalusian stallions and Criollo mares. Early on, some of the leading breeders realized that systematic, scientific breeding was necessary and that the whole process would require a demanding inspection system. Allowing individual breeders to operate completely on their own produced such a variety of types of offspring that there were an insufficient number of common denominators on which to base a new horse breed.. Several considerations were foremost in the minds of the Mexican ...

Chemical peeling implies the application of a chemical agent to the skin, which causes controlled destruction of a part or the entire epidermis, with or without the dermis, leading to exfoliation and removal of superficial lesions, followed by regene

Summarized result for the determination of nature of chemical Aluminum, 2-(1,3-dihydro-1,3-dioxo-2H-inden-2-ylidene)-1,2-dihydro-6,7-quinolinedisulfonate complexes (94891 -32 -4) on the growth and other biological and physical activity of aquatic invertebrates, algae and cyanobacteria when chemical comes in contact with test organisms, by considering the data for structurally and functionally similar read across chemicals from various sources which are as follows: Short term toxicity to aquatic invertebrates: Short term toxicity of Aluminum, 2-(1,3-dihydro-1,3-dioxo-2H-inden-2-ylidene)-1,2-dihydro-6,7-quinolinedisulfonate complexes (94891 -32 -4) on the growth and other biological activity of aquatic invertebrates is predicted on the basis of it structurally and functionally similar read across chemicals. The studies are as mentioned below: Short term toxicity study was performed to determine the toxic effect of the structurally and functionally similar read across chemicals on the invertebrates ...

This study assessed effects of a mixture of two pesticides, diazinon and permethrin, on 48-h sediment toxicity to Hyalella azteca in a constructed wetland mesocosm containing non-vegetated and vegetat

Hippocampus minotaur has been trawled from depths of 64 to 110 m on fine sandy or hard bottoms, possibly in association with gorgonian corals (Gomon 1997). Noticeable bud-like processes are present on the dorsal surface of the tail of H. minotaur, reminiscent of those on the body of H. bargibanti that are used for camouflage in soft coral fans. This may suggest that they inhabit gorgonians, but collection information to date has given scant habitat information (Gomon 1997). Little is known about their diet, but other seahorses typically prey on small crustaceans such as mysids, caridean shrimp, copepods, amphipods, and gammarids (Woods 2002, Kitsos et al. 2008). Their reproductive biology is also unknown, but other seahorses are ovoviviparous, and males brood embryos in a pouch prior to giving live birth (Foster and Vincent 2004 ...

original description Bowman, J.P., and Nichols, D.S. Novel members of the family Flavobacteriaceae from Antarctic maritime habitats including Subsaximicrobium wynnwilliamsii gen. nov., sp. nov., Subsaximicrobium saxinquilinus sp. nov., Subsaxibacter broadyi gen. nov., sp. nov., Lacinutrix copepodicola gen. nov., sp. nov., and novel species of the genera Bizionia, Gelidibacter and Gillisia. Int. J. Syst. Evol. Microbiol. (2005) 55:1471-1486. , available online at https://doi.org/10.1099/ijs.0.63527-0 [details] ...

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Boeck A. 1872. De Skandinaviske og Arktiske Amphipoder. Christiana: A.W. Brogger. http://dx.doi.org/10.5962/bhl.title.9921 Busk G. 1884. Report on the Polyzoa collected by H.M.S. Challenger during the years 1873-76. Part I - The Cheilostomata. Report on the Scientific Results of the Voyage of H.M.S. Challenger, Zoology 10(30): xxiv, 1-216, 36 pls. Chimonides P.J. & Cook P.L. 1981. Observations on living colonies of Selenaria (Bryozoa, Cheilostomata). Cahiers de Biologie Marine 22: 207-219. Coleman C.O. 2003. Digital inking: How to make perfect line drawings on computers. Organisms, Diversity and Evolution, Electronic Supplement 14: 1-14. http://senckenberg.de/odes/03-14.htm, accessed May 2009. Coleman C.O. 2009. Drawing setae the digital way. Zoosystematics and Evolution 852: 305-310. http://dx.doi.org/10.1002/zoos.200900008 Cook P.L. 1985. Bryozoa from Ghana: a preliminary survey. Annales du Musée Royal de lAfrique Central 238: 1-315. Cook P.L. & Chimonides P.J. 1981. Morphology and ...

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MIAMI - There are few venues in international football more intimidating than Mexicos 105,000 capacity Azteca Stadium but U.S. coach Bob...

Azteca for iPad, iPhone, Android, Mac & PC! Go back in time on a mission to help the Aztecs solve an ancient mystery in this matching game.!

Farming fungi is important for Azteca ant colony survival. Veronika Mayer and her colleagues find out how this fungiculture is set up.

This pilot study shows that some calcrete nodules from the base of palaeosols in the Chinese loess sequences can be dated by U-series isochron methods. The ages obtained suggest that the nodules did not form during interglacial climate stages; rather, they formed either during interglacial/glacial transitions or glacial climate stages. Thus, the nodules appear not to have formed contemporaneously with the soils beneath which they immediately lie but significantly post-date them. Post-pedogenic injection of carbonate into stratigraphically lower horizons is therefore identified. This finding contradicts previous assumptions regarding the timing of nodule formation. Carbon and oxygen isotope analyses of the nodules identify isotopic compositions which independently suggest that climatic conditions cooler and possibly drier than at present prevailed at the time of nodule formation.. ...

Short-term toxicity to fish The lethal concentration (LC50) value of 5-nitrosalicylic acid in fish[Alburnus alburnus] in a 96 hr study on mortality effect was found to be 228.214 mg/L.Thus,considering the CLP Criteria for aquatic classification of the substance , it is concluded that 5-nitrosalicylic acid does not exhibit short term toxicity to fish [Alburnus alburnus]. Long-term toxicity to fish According to annex IX of column I , Long-term toxicity testing on fish need not to be conducted as it is already provided as part of Annex VIII requirements.Therefore this study was considered to be waived. Short-term toxicity to aquatic invertebrates The effective concentration (EC50) value of 5-nitrosalicylic acid in aquatic invertebrate (Daphnia Magna) in a 48 hr study on the basis of immobilization effect was estimated to be 244.4349 mg/L. Thus considering the value from CLP Criteria for aquatic classification of the substance, it is concluded that 5-nitrosalicylic acid does not exhibits short term ...

Experimental data for 1,2,3-Propanetriol, homopolymer, diisooctadecanoate (CAS 63705-03-3) are available investigating the short-term toxicity to fish, aquatic invertebrates and algae. No effects on either fish or algae were observed up to the limit of water solubility (, 0.15 mg/L). Available data investigating the short-term toxicity of the substance to aquatic invertebrates resulted in a 48h-EC50 value , 1 and , 10 mg/L (EL50 = 5.05 mg/L based on a statistical analysis performed by qualified scientists of the owner company). The observed EC50 value is much higher than the solubility of the UVCB substance in water (, 0.15 mg/L). Therefore, in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5 read across to the structurally similar analogue substances isooctadecanoic acid, mono- and diester with glycerol (CAS No. 97358-80-0) and Glycerides, C16-18 and C18-unsatd. (CAS 67701-30-8) was conducted in order to verify if metabolites of the ester components may have been caused the toxicity. ...

In this process, Macalady and her team discovered a previously unknown form of biofilm growing in the oxygen-deficient portion of the lake. The cave explorers had seen these strange biofilms, says Macalady. So we asked them if they could get us a sample. The Frasassi cave system is located north of Rome and south of Venice in the Marche region. These limestone caves are like New Mexicos Carlsbad Caverns and Lechuguilla Cave, but in those caves, sulfur entered the caves from oil and gas reserves, while in Italy, the sulfur source is a thick gypsum layer below. Having sulfur in the environment allows sulfur-using organisms to grow. The researchers received about the weight of two paper clips of the strange rope to analyze. They reported the results of their DNA sequencing today (December 19) at the American Geophysical Union Conference in San Francisco. We did not retrieve any sequences for known methane-producing organisms or known methane oxidizers, says Macalady. The researchers did find ...

The Derived No Effect Levels for both inhalation and dermal long-term exposure, systemic effects, are estimated on the basis of the No Observed Effect Level obtained in the subacute combined repeated with the reproduction/developmental toxicity screening test in Rats (Pasics Szakonyiné, 2018). The NOAEL was established as equal/higher than 350 mg/kg body weight/day for systemic toxicity, as well as for reproductive and developmental toxicity. The calculation of DNELs is based on the NOAEL identified, which should be corrected for the differences between effect assessment data and the real human exposure situation, taking into account variability and uncertainty within and between species. In order to correct the interspecies difference between rat and human the No Observed Adverse Effect Level has to be corrected, using the default values for DNEL calculation. No DNEL is derived for inhalation acute exposure, systemic effects, based on the physical state of the substance, inhalation is not an ...

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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). ...

The head of the Dolphin Research Institute points the finger at another group of crustaceans called amphipods; another marine expert speculates it was jellyfish larvae.

The macrozoobenthos (5-30m depth) of Kongsfjord (Svalbard) was quantita-tively investigated by a SCUBA-diver operated airlift system. 63 taxa were found, 30 of which were not reported for Kongsfjord and seven not for Sval-bard before. Suspensivorous or surface and sub-surface detritivorous poly-chaetes and deposit-feeding amphipods were dominant. Only 12 of 45 spe-cies and additional 18 families inhabited the complete depth range (the poly-chaetes Dipolydora quadrilobata, Chaetozone setosa, Euchone analis, Lum-brineris sp., Ophelina sp., Scoloplos armiger, Spio armata, Travisia forbesii, the bivalves Axinopsida orbiculata and Crenella decussata, and the Opisto-branchia Cylichna sp. Clustering the samples showed a significant difference (ANOSIM) between the shallow station (5m) and the rest, the latter formed two subgroups the medium depth stations (10m, 15m, 20m) and the deeper sta-tions (25m, 30m). The biomass ranged from 3.5 to 25.0 g ash free dry mass m-2 and Shannon diversity was 2.06 (SD ...

Adults live in subtidal areas and are rarely found in intertidal areas. They feed on organisms which inhabit encrusting rock growths, with amphipods and hermit crabs being the dominant food items (Ref. 26966). Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114). ...

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Temporal variability in species composition and abundance may enhance coexistence in ecological communities, especially when subjected to strong seasonal patterns. Species distribution through time may be related to many factors, such as changes in the structure and functioning of preferred habitats, variations in ecological interactions or asynchronous patterns in species life cycles. Here, data from a one-year survey of amphipod assemblages from a nearly undisturbed Posidonia oceanica meadow are used to investigate the seasonal patterns in species abundance and identity. Our results highlight the presence of a core group of species inhabiting the meadow throughout the year, although an in depth analysis reveals three differentiated seasonal assemblages corresponding to autumn, winter, and a warm season clustering of both spring and summer. The observed patterns suggest the interplay between different mechanisms drives the coexistence of amphipods over the whole year, including niche partitioning,

Author: Schnitzler, Iris et al.; Genre: Journal Article; Published in Print: 1998; Keywords: amphipods; C-11 sulfur compounds; Dictyopteris spp.; marine|br/|ecology; plant-herbivore interactions; sea urchins|br/|Seaweed chemical defenses; coral-reef herbivores; marine brown-|br/|algae; insect equivalents; predation; plant; susceptibility;|br/|biosynthesis; resistance; chemotaxis; Title: Organic sulfur compounds from Dictyopteris spp. deter feeding by an herbivorous amphipod (Ampithoe longimana) but not by an herbivorous sea urchin (Arbacia punctulata)

ABSTRACT: Acanthocephalan parasites were collected from the intestinal tracts of 137 predominantly wild fish (1 barbel Barbus barbus, 3 European chub Squalius cephalus, 13 rainbow trout Oncorhynchus mykiss and 120 brown trout Salmo trutta) from 12 localities. The condition factor, intensity of acanthocephalan infection and pathological lesions, if applicable, were documented. Routine bacteriology and virology were performed, and the brown trout were additionally tested for the presence of the myxozoan parasite Tetracapsolioides bryosalmonae by PCR. In total, 113 acanthocephalans were barcoded by sequencing a section of the mitochondrial cytochrome oxidase subunit I (COI) gene. Barcoding of the acanthocephalan tissues resulted in 77 sequences, of which 56 were assigned to Echinorhynchus truttae (3 genotypes), 11 to Pomphorhynchus tereticollis (9 genotypes), 9 to Acanthocephalus sp. (5 genotypes) and 1 to Neoechinorhynchida. Most of these genotypes were detected for the first time. Statistically, ...

Five rare or endangered plant species native to Kīpuka Puaulu and Kīpuka Kī were studied for two years to determine their stand structure, patterns of reproductive phenology, success of fruit production, potential pollinators, greenhouse seed germination rates, presence of soil seed banks, impacts of seed-predating rats, seed predation by insects, seedling predation by Kalij pheasant (Lophura leucomelanos), and seedling survival with different treatments. Species monitored were the trees Hibiscadelphus giffardianus (hau kuahiwi), Melicope hawaiensis (manena), M. zahlbruckneri (alani), and Zanthoxylum dipetalum var. dipetalum (kāwa`u), and the vine Sicyos macrophyllus (`ānunu). Limiting factors identified for H. giffardianus were rat predation of seeds, bark-stripping, low fruit production likely resulting from the inter-relatedness of the planted population, and loss of original pollinators. For M. hawaiensis, rat and native insect predation of seeds limited the number of seeds available, and

TY - JOUR. T1 - Reproduction, dominance, and caste. T2 - Endocrine profiles of queens and workers of the ant Harpegnathos saltator. AU - Penick, Clint. AU - Liebig, Juergen. AU - Brent, Colin S.. PY - 2011/11/1. Y1 - 2011/11/1. N2 - The regulation of reproduction within insect societies is a key component of the evolution of eusociality. Differential patterns of hormone levels often underlie the reproductive division of labor observed among colony members, and further task partitioning among workers is also often correlated with differences in juvenile hormone (JH) and ecdysteroid content. We measured JH and ecdysteroid content of workers and queens of the ant Harpegnathos saltator. In this species, new colonies are founded by a single queen, but after she dies workers compete in an elaborate dominance tournament to decide a new group of reproductives termed gamergates. Our comparisons revealed that queens, gamergates, and inside workers (non-reproductive) did not differ in levels of JH or ...

The EFSA Panel on Plant Protection Products and their Residues (PPR Panel) was tasked to revise the Guidance Document (GD) on Aquatic Ecotoxicology under Council Directive 91/414/EEC (SANCO/3268/2001 rev. 4 (final), 17 October 2002). This scientific opinion of the PPR Panel is the second of three requested deliverables within this mandate. The scientific background for the risk assessment on sediment organisms in edge-of-field surface waters is provided, with reference to benthic ecology and ecotoxicology, available test protocols and current knowledge on exposure and effects of sediment-bound plant protection products (PPPs). The scientific opinion provides approaches on how to derive regulatory acceptable concentrations (RACs) for sediment organisms and exposure to active substances of PPPs and transformation products of these substances, and how to link them in a tiered approach to predicted environmental concentrations (PECs) for the sediment compartment. A list of uncertainties in relation ...

Researchers have recently found a zombie parasite lurking among freshwater shrimp in Northern Ireland. They found the tiny parasite, Pleistophora mulleri, not only significantly increased cannibalism among shrimp, it also made infected shrimp more voracious, taking much less time to consume their victims.. While cannibalism is actually fairly common in nature and has been recorded in more than 3000 species. Dr Dunn and co-authors said in a new study that although consumption of juveniles by adults is a normal feature of the shrimp Gammarus duebeni celticus feeding patterns, shrimp infected with Pleistophora mulleri ate twice as much of their own kind as uninfected animals.. They attacked juvenile shrimp more often and consumed them more quickly than did uninfected shrimp.. Our work is the first study to ask if cannibalism is affected by being parasitized, said Dr Alison Dunn of the University of Leeds, UK, the senior author on the study.. To be honest the zombie link here is a bit tenuous! ...

Dr. Maria (Marisol) Sepúlvedas main area of research is ecotoxicology. Over the last decade, she has conducted extensive research evaluating the sublethal effects of a wide-range of environmental contaminants on the physiology of numerous terrestrial and aquatic species. For instance, she has worked with heavy metals (mercury), complex industrial mixtures (paper mill effluents), herbicides and pesticides (e.g. atrazine, dieldrin, DDT and derivatives, and toxaphene), and industrial pollutants (polychlorinated biphenyls and polyaromatic hydrocarbons). In terms of species, although most of her work has been focused using vertebrates (including marine mammals, birds, and fishes) as animal models, Dr. Sepúlveda has recently began research with aquatic invertebrates (Hyalella and Diporeia). Within the field of ecotoxicology, Dr. Sepúlvedas main area of interest involves studying the potential health effects of environmental contaminants in populations of free-ranging fish and wildlife. ...

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Learn about the veterinary topic of Acanthocephalans in Small Animals. Find specific details on this topic and related topics from the Merck Vet Manual.

Arctic, Antarctic, and Alpine Research publishes research and book reviews on any scientific or cultural aspect of Arctic, Antarctic, and alpine environments.

Despite the lack of photosynthetically-fixed carbon, the Movile Cave ecosystem (43.825487 N; 28.560677 E, located near Mangalia, Romania and situated 21 m below ground) hosts a diverse range of invertebrates (worms, insects, spiders and crustaceans) that are adapted to life in the dark. Life within this ecosystem is supported by chemoautotrophic primary producers that derive energy from the oxidation of inorganic compounds such as hydrogen sulphide (H2S) and methane (CH4) that enter the cave with thermal fluids, analogous to hydrothermal vents [1, 2]. This hypogenic cave ecosystem, devoid of any input from the surface due to layers of impermeable clays and loess, has been isolated from the surface for ~ 5.5 million years and the majority of the invertebrate species present are endemic to Movile Cave and surrounding aquifers. Cave formation, features, and previous work on Movile Cave microbiology has been previously reviewed in detail [3]. Briefly, the pH (7.4) of lake water in the cave and the ...

This article describes a new technique used by ants ( Azteca cf. lanuginosa) in the Brazilian Cerrado to capture large mobile insects. Large numbers of ants position themselves along a leaf margin in

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By Vernon E. Thatcher. For a few years, scholars from quite a few international locations have complained in regards to the loss of tools to spot aquatic invertebrates from Latin the US. Keys present in approved textbooks are as a rule constrained, superficial or too popular-science. nonetheless, extra complicated keys in educational books on aquatic invertebrates fail to hide Neotropical representatives in due aspect. The few that do, despite the fact that, additionally express too many defects in scope and presentation to be thought of updated. a world crew of editors mixed their efforts with Pensoft Publishers to release a brand new significant sequence at the aquatic biodiversity of Latin the US. approximately 15 monographs, written through scientists from a number of international locations, will provide a brand new, unrivalled view of the marvellous aquatic global of South the US! The sequence is addressed to zoologists, ecologists, hydrobiologists, biogeographers, conservationists and ...

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Human mediated transfer of non-indigenous species is considered to be a major threat to global biodiversity. The Ponto-Caspian round goby (Neogobius melanostomus), which has established populations in various regions in Eurasia and North-America, was first observed in Gulf of Gdańsk, Baltic Sea, in 1990. In this thesis the round goby is used as case study for assessing the invasion process of an alien species in to the Baltic Sea. Factors governing life history characteristics, traits that have enhanced the invasion, and ecological consequences for the Baltic Sea are assessed. Two diverging life history strategies of the round goby related to habitat were found: one to-wards early maturation and short population turnover time in sheltered areas, the other towards high growth rate and late maturation in exposed areas. Females produced two batches in average during the spawning season. Lengths of spawning season and annual fecundity of round gobies in Gulf of Gdańsk were in the same range as in ...

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In general, the calculation of a DNEL is based on the observed effect level and has to be corrected for the differences between effect assessment data and the real human exposure situation, taking into account variability and uncertainty within and between species. If there is no basis for setting a DNEL or DMEL for a given human health endpoint, i.e. due to the lack of quantitative dose-response information, but there exists toxicity data of a qualitative nature, a qualitative risk assessement is performed. This kind of situation typically occurs with data on irritation/corrosion, sensitisation, acute toxicity, mutagenicity, and carcinogenicity. INHALATION ROUTE Systemic effects after long term exposure The substance is manufactured and used in non solid form and it has a negligible vapour pressure. Despite a low potential for systemic exposure via inhalation, a DNEL is derived. The starting point to derive a long term DNEL for inhalation route was a NOAEC of 87 mg/m3derived from a NOAEL of 200 ...

Subjects Agricultural Resource Management Studyx Subjects Conservation Effects Assessment Projectx Subjects No-tillagex Subjects Statisticsx Authors United States Dept. of Agriculture. Economic Research Service.x ...

Subjects Agricultural Resource Management Studyx Subjects Conservation Effects Assessment Projectx Subjects No-tillagex Authors Ebel, Robert.x Authors United States Dept. of Agriculture. Economic Research Service.x ...

Inhabits deep, cold waters over steep continental slopes, ocean ridges and sea-mounts. Shallow range of usual occurrence from Ref. 27121. Appears to be dispersed over both rough bottoms and steep, rough grounds where it feeds on crustaceans and fish. In New Zealand, the main prey include mesopelagic and benthopelagic prawns, fish, and squid, with other organisms such as mysids, amphipods and euphausiids occasionally being important (Ref. 9072). Juveniles feed mainly on crustaceans (Ref. 27075, 27076). Grows very slowly and is one of the longest lived fish species known. Based on parasite and trace-element analyses, orange roughy is a sedentary species with little movement between fish-management zones (Ref. 27089). Little is known of the larvae and juveniles which are probably confined to deep water (Ref. 27088). The fishery targets sporadically formed dense spawning and non-spawning aggregations. Marketed fresh and frozen; eaten steamed, fried, microwaved and baked (Ref. 9988). Because of ...

Heres some more pictures of the massive lobster Ian saw when he was hanging around the docks at Port Askaig the other day. It really is a monster, we can only hope its size and novelty value saved it from the pot. Apparently the largest European lobster (Homarus gammarus) specimen on record measured 1.26m and weighed 9.3kg (20lb 8oz). Caught in 1931 in Fowey, England, the exoskeletal shell of its crushing claw alone weighed 1.2kg ...

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When scientists examined the stomach contents of small (about 6-10 cm / 2-4 inches long) palm ruffs, they found them to be packed full of H. curticephala and nothing else. As they grew larger, the fish started having a more varied diet, but hyperiids still make up for over 97% of their prey. The amount of H. curticephala in the stomach of palm ruffs reaches a peak in February, just as the parasite also reaches very high abundances in the medusa when some individual C. plocamia can be infected with over a thousand amphipods (which in turn provides a floating banquet for any hungry palm ruff). The abundance of H. curticephala also reaches a high during November, but this was not reflected in the stomach content of the fish - so why is that? The scientists suggested that during this season, most of the medusae available are still quite small and while collectively they might be harbouring a high abundance of H. curticephala, because of their smaller bell size they are inaccessible to the palm ruff ...

Skunk Tilefish should be kept in an aquarium that is no less than 55 gallons and must be provided with a sand substrate (live if possible) of at least 3 in depth, plenty of live rock (with multiple hiding places), and unobstructed swimming space throughout the water column. They like to burrow in the substrate and could dislodge live rock if its not secure by twisting it into place during aquascaping. They are known to jump when startled and their aquarium should be provided with a sealed hood or tight-fitting top. In addition to quality biological and mechanical filtration used in conjunction with a protein skimmer, the Skunk Tilefish would greatly benefit with the addition of a refugium, hosting a live amphipod and/or copepod population as well as adding to overall water volume and filtration. They are active and peaceful fish that are usually observed swimming around the water column in search of zooplankton when not hiding at the slightest sign of danger. They can coexist peacefully with ...

Treats are supposed to be Fun and interactive. Zilla Turtle chasers float and encourage aquatic turtles to chase them around the habitat. Fascinating to watch Turtles hund down and nibble off bits until the entire morsel is devoured. Shrimp are gammarus shrimp, a favorite turtle treat that is high in protein and a natu

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This book addresses the habitats of cave animals, their complex diversity and the environmental factors that support that diversity, individual case studies of cave ecosystems and the conservation challenges they face, all of which culminate in proposals for future research directions.