Results 11 to 20 of about 5,244 (196)

Long‐Term Sperm Storage in a Superfetatious Live‐Bearing Fish (Poeciliopsis gracilis, Poeciliidae)

Ecology and Evolution
Sperm storage is a post‐copulatory strategy by which females can improve their fecundity by creating asynchrony between mating and fertilization. Sperm storage duration varies across vertebrate species, wherein longer sperm storage is thought to coincide
T. R. Ernst, R. M. H. W. Hogers, P. J. C. Kwant, A. Korosi, J. L. vanLeeuwen, A. Kotrschal, B. J. A. Pollux   +6 more
doaj   +2 more sources

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

Direct Development of Golf Ball Sponges, Genus Craniella (Demospongiae, Tetractinellida) From the Northeast Atlantic Ocean. [PDF]

Mol Reprod Dev
ABSTRACT Among the eight types of development in sponges, the least common and least studied is direct, non‐larval development during viviparity. To supplement our knowledge of this rare type of demosponge development, we present here a description of the embryonic development of four species of the genus Craniella (Demospongiae, order Tetractinellida)
Cárdenas P, Chenesseau S, Drewery J, Ereskovsky A.   +3 more
europepmc   +2 more sources

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

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

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