Results 11 to 20 of about 5,209 (201)

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

Demography Meets Climate Change: Life History Challenges for a Neotropical Viviparous Lizard. [PDF]

Ecol Evol
Considering the current biodiversity crisis, it is crucial to understand the impact of global environmental changes on natural populations. Analyzing demographic parameters from long‐term studies is the most effective approach to uncovering patterns that describe population dynamics.
Santos MLG, de Sousa HC, Machado LPC, Colli GR.   +3 more
europepmc   +2 more sources

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

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

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

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

PLoS 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, Da-yong Jiang, Andrea Tintori, Olivier Rieppel, Guan-bao Chen   +4 more
doaj   +1 more source

Early Development Drives Variation in Amphibian Vulnerability to Global Change

Frontiers 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

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, Cristina Porcu, Noemi Pascale, Andrea Bellodi, Alessandro Cau, Antonello Mulas, Paola Pesci, Riccardo Porceddu, Maria Cristina Follesa   +8 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

Viviparous mothers impose stronger glucocorticoid‐mediated maternal stress effects on their offspring than oviparous mothers

Ecology and Evolution, 2021
Maternal stress during gestation has the potential to affect offspring development via changes in maternal physiology, such as increases in circulating levels of glucocorticoid hormones that are typical after exposure to a stressor.
Kirsty J. MacLeod, Geoffrey M. While, Tobias Uller   +2 more
doaj   +1 more source