Results 1 to 10 of about 225 (136)
Summary: Live birth (viviparity) has arisen repeatedly and independently among animals. We sequenced the genome and transcriptome of the viviparous Pacific beetle-mimic cockroach and performed comparative analyses with two other viviparous insect ...
Bertrand Fouks +13 more
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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
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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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Unusual morphological adaptations and processes associated with viviparity in an epizoic dermapteran. [PDF]
Matrotrophic viviparity is a reproductive pattern in which offspring develop inside a female's body which provides gas exchange and nutrients necessary for development.
Szczepan M Bilinski +3 more
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Background Glossina species (tsetse flies), the sole vectors of African trypanosomes, maintained along their long evolutionary history a unique reproductive strategy, adenotrophic viviparity.
Grazia Savini +10 more
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Reproductive biology is fundamental to understanding the ecology and evolution of lizards which, in turn, is essential for the definition of the species´ conservation status.
JESÚS E. PIZARRO +4 more
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Factors affecting gestation periods in elasmobranch fishes
Gestation periods vary greatly across elasmobranch species. Differences in body size and body temperature (i.e. major determinants of metabolic rates) might explain such variation.
Soma Tokunaga +3 more
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Terrestrial origin of viviparity in mesozoic marine reptiles indicated by early triassic embryonic fossils. [PDF]
Viviparity in Mesozoic marine reptiles has traditionally been considered an aquatic adaptation. We report a new fossil specimen that strongly contradicts this traditional interpretation.
Ryosuke Motani +4 more
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Early Development Drives Variation in Amphibian Vulnerability to Global Change
Understanding how natural selection determines species’ life histories can reveal their resilience or sensitivity to anthropogenic changes. For example, the safe harbor hypothesis posits that natural selection will favor life histories that maximize the ...
George C. Brooks, Holly K. Kindsvater
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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
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