• The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which eggs are stored. (wikipedia.org)
  • The clitellum is part of the reproductive system of clitellates, a subgroup of annelids which contains oligochaetes (earthworms) and hirudineans (leeches). (wikipedia.org)
  • Probably not anything lovely what with hulls riddled with worm holes, hysterical little sisters chased by big brothers holding earthworms or coming ashore after a swim to find one's legs covered with leeches. (allatsea.net)
  • Amassing facts and factoids, he saw divinely created predators' reproductive rates lower than those of prey, buttressing the idea of a providentially determined balance with a tale of a mutualism between Nile crocodiles beset with leeches and a plover species that feeds on them [1]. (1library.org)
  • Among Romans, Cicero followed Herodotus and Plato in advancing a balance of nature generated by different reproductive rates and traits among species, as well as interactions among species [1]. (1library.org)
  • Bufo spinosus is a primarily nocturnal species, though it may also be active in the daytime during the reproductive season. (amphibiaweb.org)
  • Females of all species produce larger reproductive cells than males. (distinctlymontana.com)
  • Sperm evolution is regarded to be one of the major consequences of sperm competition in polyandrous species, however it can also be driven by adaptation to the environmental conditions at the site of fertilization. (biomedcentral.com)
  • Several populations of this species have successfully adapted to en. (charlotte.edu)
  • The medicinal leech, Hirudo medicinalis, was one of the first aquatic parasites to be cultured. (ap24534inhibitor.com)
  • A growing number of aquatic parasite cultures are available, primarily to facil- itate disease management in animal production but also to advance our understanding of host-parasite inter- actions and evolution. (ap24534inhibitor.com)
  • Found around the world not only in the tropics but also in cold water, the evolution and diversity of marine worms is nothing short of spectacular. (allatsea.net)
  • Based on six years of observational data, we analysed factors affecting occupancy, mate and chamber fidelity, and reproductive success to optimise nest chamber installation and to enhance future management. (marineornithology.org)
  • Aside from the effects of sperm competition, adaptation to fertilization environments can be predicted to have an impact on the evolution of sperm traits. (biomedcentral.com)
  • Yet culturing parasites presents multiple challenges, arising from their complex, often multihost life cycles, multiple devel- opmental stages, variable generation times and reproductive modes. (ap24534inhibitor.com)
  • In leeches, the clitellum appears during mating season, where it is used for both sexual reproduction and the secretion of a cocoon for the eggs. (wikipedia.org)
  • En este trabajo se presenta una lista de los mamíferos nativos de Paraguay actualizada a 2016 con base en investigación bibliográfica. (scielo.org.mx)
  • Here we analyzed reproductive morphology differences among males employing characteristic alternative mating behaviours, and so potentially different conditions of sperm competition and fertilization environment, in the squid Loligo bleekeri . (biomedcentral.com)
  • Intra-specific tests are possible where alternative male reproductive tactics, in which consort males guard females and sneaker males steal fertilizations from consort males, result in biased sperm competition risk among males [ 17 ]. (biomedcentral.com)
  • This glow draws in the males who begin to flash like tiny strobes and as male meets female, their reproductive segments drop off and combine in the water where larvae hatch and drift out to sea to continue the life cycle. (allatsea.net)
  • Changes in maturing males include increasing concavity of the anterior portion of their pectoral fins that causes the body to acquire a bell-like shape, appearance of alar thorns on their pectoral fins and malar thorns on their cheeks, and elongation of claspers (male reproductive organs). (amnh.org)
  • 2019). Anthropogenic disturbance in a changing environment: modelling lifetime reproductive success to predict the consequences of multiple stressors on a migratory population . (oregonstate.edu)
  • We propose that presence of alternative fertilization environments with distinct characteristics (i.e. internal or external), whether or not in combination with the effects of sperm competition, can drive the disruptive evolution of sperm size. (biomedcentral.com)
  • Theoretical models suggest that the pressures of sperm competition and cryptic female choice will drive sperm evolution towards an optimal morphology [ 3 ]. (biomedcentral.com)
  • Similarly, in Drosophila sperm length coevolves with the length of the female reproductive tract as paternity bias is selected by female morphology [ 5 ], and so an optimal sperm morphology that fits with the majority of female reproductive morphologies would be selected, resulting in reduced intra-specific diversity in sperm morphology. (biomedcentral.com)
  • Genomic fossils calibrate the long-term evolution of hepadnaviruses. (virology.ws)
  • The odds are astronomical that the Scottish 'mollyhawk' (sailors' old name for medium-sized albatrosses) will find a mate but its reproductive frustration has shown in advances to its neighbours and a nest mound! (birdwatching.co.uk)
  • Alkaline pH: Evolution Water helps neutralize your bodies pH that over years has most likely become acidic from all of the processed foods, sugary drinks,and even bottled water. (evolutionhealthworks.com)
  • Evolution Ionizers provide our bodies with energy through infusing lots of oxygen into them. (evolutionhealthworks.com)
  • Evolution Ionizers use our Water Filtration System, ensuring the certified healthiest water free of contaminants. (evolutionhealthworks.com)
  • Evolution Healthworks offers a comprehensive line of filtration systems that will remove nitrates and 99.9% of other toxic pollutants from your water. (evolutionhealthworks.com)
  • The "balance of nature"-evolution of a Panchreston. (1library.org)
  • Evolution of nuptial feeding and sexual cannibalism in arthropods, sexual selection of animals including humans. (sav.sk)
  • Reproductive tract biology: Of mice and men. (docslib.org)
  • By studying lamprey genomics, Smith's team aims to understand what PGR reveals about vertebrate evolution, cancer biology, and the genetic rules of our own species. (nih.gov)
  • Morphological observations on secondary sexual structures inform on reproductive biology in groups like lithobiomorphs for which there are limited behavioral data. (bvsalud.org)
  • Monocots: Systematics and Evolution presents leading work from around the world on non-grass monocotyledons and includes reviews and current research into their comparative biology, phylogeny and classification. (publish.csiro.au)
  • Investigators later found these developmental and also reproductive problems were due to herbicides and an insect growth regulator, methoprene. (drfoxonehealth.com)
  • Accordingly, for sound homology assessments and reconstructions of character evolution on organ system level, additional independent datasets (e.g., morphological, developmental) need to be included in any such analyses. (bvsalud.org)
  • So far, there has been no conclusive evidence on BPA's health effects, although a mounting body of research suggests that it may be causing reproductive and developmental problems. (nzlii.org)
  • Do social networks of female northern long-eared bats vary with reproductive period and age? (google.ca)
  • Analyses of relative abundance and reproductive activity of bats in southrastern Colombia. (aultimaarcadenoe.com.br)
  • 14. Evolution of breast cancer incidence in young women in a French registry from 1990 to 2018: Towards a change in screening strategy? (nih.gov)
  • The main purpose of classification is to inform us about the inter-relationship between different groups of plants & animals and a natural evolutionary relationship, is based on natural affinity among organisms and their evolution. (rbsesolutions.com)
  • Wautier A, Tournaire M, Devouche E, Epelboin S, Pouly JL, Levadou A. Genital tract and reproductive characteristics in daughters of women and men prenatally exposed to diethylstilbestrol (DES). (docslib.org)
  • In leeches, the clitellum appears during mating season, where it is used for both sexual reproduction and the secretion of a cocoon for the eggs. (wikipedia.org)
  • 2017 ). Given that selection constantly removes genetic variants that lead to poor performance, one might suspect that reproductive failure typically results from inbreeding (Briskie and Mackintosh 2004 ), because selection against recessive deleterious mutations is inefficient, or from environmental factors (Jurewicz et al. (uchicago.edu)
  • For instance, reproductive failure and mortality may be caused by selfish genetic elements that are self-promoting at the cost of organismal fitness (Sandler et al. (uchicago.edu)
  • Tissue interactions and estrogenic response during human female fetal reproductive tract development. (docslib.org)
  • SWEET ( MtN3_saliva ) domain proteins, a recently identified group of efflux transporters, play an indispensable role in sugar efflux, phloem loading, plant-pathogen interaction and reproductive tissue development. (biomedcentral.com)
  • Analysis of public transcriptome data and expression profiling using quantitative real time PCR (qRT-PCR) showed that a majority of the GmSWEET genes were confined to reproductive tissue development. (biomedcentral.com)
  • Present investigation utilized comparative genomics, transcriptome profiling and whole genome re-sequencing approaches and provided a systematic description of soybean SWEET genes and identified putative candidates with probable roles in the reproductive tissue development. (biomedcentral.com)
  • Stored sugars are then transported from leaves (source tissue) to the other plant parts (sink tissue) such as roots, modified leaves, and reproductive tissues (seeds). (biomedcentral.com)
  • The complete genome contains 99 pairs of chromosomes and is found only in reproductive (germline) cells-eggs and sperm. (nih.gov)
  • Development of the human female reproductive tract. (docslib.org)
  • This includes the bizarre Pycnogonida (sea spiders) or "no-bodies", a taxon occupying a crucial phylogenetic position for the interpretation of arthropod development and evolution. (biomedcentral.com)
  • 11. Socio-economic and regional variation in breast and cervical cancer screening among Indian women of reproductive age: a study from National Family Health Survey, 2019-21. (nih.gov)
  • Introduction to Animal Kingdom, Rabbit, and The Indian Cattle Leech. (embibe.com)
  • Some women were bled out by doctors or leeches, some were given enemas, and some were even institutionalized for hysteria. (mythermaband.com)
  • We discussed the dramatic impact of the Women's Health Initiative's research on HRT use with our friend and advisor, Dr. Mary Jane Minkin, Clinical Professor in the Department of Obstetrics, Gynecology, and Reproductive Sciences at the Yale University School of Medicine. (mythermaband.com)
  • The sea lamprey germline genome provides insights into programmed genome rearrangement and vertebrate evolution. (nih.gov)
  • 2008. This newly discovered turtle leech is here presented along with new information about its identification and geographic distribution in Thailand. (pensoft.net)
  • They also highlight which cellular processes-such as spinal cord regeneration and PGR-were lost during evolution of the majority of vertebrates. (nih.gov)
  • With its archival material, dating back to 1970 in some cases, GenderWatch is a repository of important historical perspectives on the evolution of the women's movement, men's studies, the transgendered community, and the changes in gender roles over the years. (illinois.edu)