Results 11 to 20 of about 655 (157)
Natural variation in the Caenorhabditis elegans egg-laying circuit modulates an intergenerational fitness trade-off [PDF]
eLifeEvolutionary transitions from egg laying (oviparity) to live birth (viviparity) are common across various taxa. Many species also exhibit genetic variation in egg-laying mode or display an intermediate mode with laid eggs containing embryos at various ...
Laure Mignerot +6 more
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To What Extent Can Life History Strategies Inform Reptile Conservation Planning? [PDF]
Ecol EvolConservation planners must effectively target interventions to reduce the extinction risk of species. If we can use a species' life history strategies to predict their responses to interventions, this offers a promising approach to better understand species extinction risks and conservation potential.
Stevenson EA +4 more
europepmc +2 more sources
De novo transcriptome for Chiloscyllium griseum, a long-tail carpet shark of the Indian waters [PDF]
Scientific DataSharks have thrived in the oceans for 400 million years, experienced five extinctions and evolved into today’s apex predators. However, enormous genome size, poor karyotyping and limited tissue sampling options are the bottlenecks in shark research ...
Pooja Harshan +2 more
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Assessing the metabolic and physiological costs of oviparity in the epaulette shark (Hemiscyllium ocellatum) [PDF]
Biology OpenCarolyn R. Wheeler +3 more
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Artificial Insemination and Parthenogenesis in the Zebra Shark Stegostoma tigrinum
Frontiers in Marine Science, 2022 Maintaining self-sustaining populations of zoo and aquarium collections can be challenged when natural reproduction fails within mixed-sex populations; however, reproductive success can sometimes be restored with the application of reproductive ...
Lance Adams +7 more
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Animals, 2021 Oviducal glands (OGs) are distinct expanded regions of the anterior portion of the oviduct, commonly found in chondrichthyans, which play a key role in the production of the egg in-vestments and in the female sperm storage (FSS).
Martina Francesca Marongiu +8 more
doaj +1 more source
Mixed-Mode Bacterial Transmission via Eggshells in an Oviparous Reptile Without Parental Care
Frontiers in Microbiology, 2022 Symbiotic microorganisms play important roles in maintaining health and facilitating the adaptation of the host. We know little about the origin and transgenerational transmission of symbiotic bacteria, especially in egg-laying species without parental ...
Teng Li +3 more
doaj +1 more source
Frontiers in Ecology and Evolution, 2022 In a captive colony of Chersina angulata in Cape Town, South Africa, we observed in 2015/16 retention of the last egg clutch inside the female until the hatching stage was reached, conforming to the generally accepted definition of viviparity ...
Gerald Kuchling, Margaretha D. Hofmeyr
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Phyllomedusa: Journal of Herpetology, 2014 The Neotropical genus Lachesis Daudin, 1803 includes snakes restricted to the humid forests of Central and South America. The species L. muta is the most widely dispersed, occurring throughout the Amazon rainforest, and with an isolated population in ...
Fátima Q. Alves +2 more
doaj +3 more sources
Frontiers in Zoology, 2021 Parity mode (oviparity/viviparity) importantly affects the ecology, morphology, physiology, biogeography and evolution of organisms. The main hypotheses explaining the evolution and maintenance of viviparity are based on bioclimatic predictions and also ...
J. L. Horreo +2 more
doaj +1 more source