Results 1 to 10 of about 5,260 (219)

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

iScience, 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, Mark C. Harrison, Alina A. Mikhailova, Elisabeth Marchal, Sinead English, Madeleine Carruthers, Emily C. Jennings, Ezemuoka L. Chiamaka, Ronja A. Frigard, Martin Pippel, Geoffrey M. Attardo, Joshua B. Benoit, Erich Bornberg-Bauer, Stephen S. Tobe   +13 more
doaj   +2 more sources

REPTILIAN VIVIPARITY AND DOLLO'S LAW [PDF]

Evolution; International Journal of Organic Evolution, 1998
It has been suggested repeatedly that the evolutionary transition from oviparity (egg-laying) to viviparity (live-bearing) in reptiles is irreversible. However, these adaptive arguments have yet to be tested by detailed examination of the phylogenetic distribution of oviparity and viviparity across a broad range of taxa.
Michael S Y Lee, Richard Shine
exaly   +3 more sources

Viviparity stimulates diversification in an order of fish

Nature Communications, 2016
International audienceSpecies richness is distributed unevenly across the tree of life and this may be influenced by the evolution of novel phenotypes that promote diversification.
Andrew J Helmstetter, Javier Igea, Tom J M Van Dooren   +2 more
exaly   +4 more sources

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

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, A. Jiménez-Valverde, P. S. Fitze   +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

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
doaj   +1 more source

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

PLoS 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, Mariusz K Jaglarz, Ali Halajian, Waclaw Tworzydlo   +3 more
doaj   +1 more source

MORPHOLOGY, REPRODUCTION, SEASONAL ACTIVITY AND HABITAT USE OF A NORTHERN POPULATION OF THE SMOOTH GREENSNAKE (OPHEODRYS VERNALIS) [PDF]

, 2020
The Smooth Greensnake (Opheodrys vernalis) is a small, slender, oviparous, colubrid snake that is widely distributed in North America. Nonetheless, there have been few studies on this species, and little is known about Canadian populations. The objective
Cairns, Nicholas A., Rutherford, Pamela L.   +1 more
core   +2 more sources

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

BMC 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, Francesca Scolari, Lino Ometto, Omar Rota-Stabelli, Davide Carraretto, Ludvik M. Gomulski, Giuliano Gasperi, Adly M. M. Abd-Alla, Serap Aksoy, Geoffrey M. Attardo, Anna R. Malacrida   +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

Anais 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, ALEJANDRO LASPIUR, JUAN C. ACOSTA, GRACIELA M. BLANCO, JORGELINA M. BORETTO   +4 more
doaj   +1 more source

Factors affecting gestation periods in elasmobranch fishes

Biology 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, Yuuki Y. Watanabe, Mai Kawano, Yuuki Kawabata   +3 more
doaj   +1 more source