Results 1 to 10 of about 225 (136)

Live-bearing cockroach genome reveals convergent evolutionary mechanisms linked to viviparity in insects and beyond

open access: yesiScience, 2023
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
doaj   +1 more source

Climatic niche differences among Zootoca vivipara clades with different parity modes: implications for the evolution and maintenance of viviparity

open access: yesFrontiers 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

Too Hot to Nest? In a Hot Summer the Tortoise Chersina angulata Can Switch From Nesting to Facultative Viviparity

open access: yesFrontiers 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
doaj   +1 more source

Unusual morphological adaptations and processes associated with viviparity in an epizoic dermapteran. [PDF]

open access: yesPLoS ONE, 2018
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
doaj   +1 more source

Viviparity and habitat restrictions may influence the evolution of male reproductive genes in tsetse fly (Glossina) species

open access: yesBMC Biology, 2021
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
doaj   +1 more source

High reproductive effort in a vulnerable lizard from high altitudes in Argentina: Reproductive biology and sexual dimorphism in Phymaturus extrilidus

open access: yesAnais da Academia Brasileira de Ciências, 2022
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
doaj   +1 more source

Factors affecting gestation periods in elasmobranch fishes

open access: yesBiology Open, 2022
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
doaj   +1 more source

Terrestrial origin of viviparity in mesozoic marine reptiles indicated by early triassic embryonic fossils. [PDF]

open access: yesPLoS ONE, 2014
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
doaj   +1 more source

Early Development Drives Variation in Amphibian Vulnerability to Global Change

open access: yesFrontiers in Ecology and Evolution, 2022
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
doaj   +1 more source

A Taxonomic Survey of Female Oviducal Glands in Chondrichthyes: A Comparative Overview of Microanatomy in the Two Reproductive Modes

open access: yesAnimals, 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

Home - About - Disclaimer - Privacy