Results 31 to 40 of about 655 (157)

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

Extreme plasticity in reproductive biology of an oviparous lizard [PDF]

Ecology and Evolution, 2018
AbstractMost oviparous squamate reptiles lay their eggs when embryos have completed less than one‐third of development, with the remaining two‐thirds spent in an external nest. Even when females facultatively retain eggs in dry or cold conditions, such retention generally causes only a minor (<10%) decrease in subsequent incubation periods.
Mats Olsson, Lisa Loeb, Willow Lindsay, Erik Wapstra, Luisa Fitzpatrick, Richard Shine   +5 more
openaire   +3 more sources

Terrestrial gastropods - how do they reproduce? [PDF]

Invertebrate Survival Journal, 2017
Molluscs are the most diverse group in respect of sexual systems and strategies. They can be dioecious with separate sexes or hermaphroditic. Within hermaphroditism, it is possible to distinguish a number of modifications of this type of reproduction ...
KS Zając, PE Kramarz
doaj   +2 more sources

Egg retention and intrauterine embryonic development in Sceloporus aeneus (Reptilia: Phrynosomatidae): implications for the evolution of viviparity

Revista Mexicana de Biodiversidad, 2012
Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus ...
Rodolfo García-Collazo, Maricela Villagrán-Santa Cruz, Eduardo Morales-Guillaumin, Rubi Nelsi Meza-Lázaro, Fausto R. Méndez-de la Cruz   +4 more
doaj   +1 more source

THE NON-OVIPAROUS FEMALE HOOKWORM [PDF]

JAMA: The Journal of the American Medical Association, 1910
In every higher animal we recognize certain more or less definite periods of physiologic activity, and we roughly divide the span of life into three stages, which are in no way sharply outlined. These we call the stages of youth, adolescence, and old age.
openaire   +1 more source

Loss, persistence and reversal of phenotypic traits

Biological Reviews, EarlyView.
ABSTRACT The irreversibility of complex trait loss has long been a tenet of evolutionary biology. However, this idea is increasingly at odds with the numerous documented exceptions across the Tree of Life. We synthesise this growing body of evidence across a diverse array of taxa and traits, exploring the evolutionary conditions that enable ...
Giobbe Forni, Giuseppe Fusco, Filippo Nicolini, Heather Bruce, Andrea Luchetti   +4 more
wiley   +1 more source

Decoding Dual Regulatory Layers: Integrating Differential Expression and Alternative Splicing Dynamics in the Evolution of Laryngeal Echolocation Across Chiropteran Lineages

Integrative Zoology, EarlyView.
We integrated short‐read and long‐read RNA‐seq data from cochlear tissues of echolocating and non‐echolocating bats to disentangle transcriptional and post‐transcriptional regulation. Echolocating bats showed neural‐function enrichment among differentially expressed genes, while alternatively spliced genes were linked to epigenetic regulation. Overlaps
Jianyu Wu, Daoyuan Hu, Min Chen, Xiuguang Mao   +3 more
wiley   +1 more source

Gene Expression and Alternative Splicing Throughout the Reproductive Cycle of a Viviparous Lizard Reveal Novel Genes for Pregnancy and Convergence With Squamates and Mammals

Molecular Ecology, Volume 35, Issue 14, July 2026.
ABSTRACT Squamate pregnancy is an important topic in reproductive and evolutionary biology, as it provides insight to amniote live‐bearing that is not mammalian. Gene regulation in squamates is poorly characterised and the extent of molecular convergence in the developmental mechanisms of pregnancy across amniotes is strongly debated.
John L. Smout, Maureen M. Bain, Mark McLaughlin, Kathryn R. Elmer   +3 more
wiley   +1 more source

Developmental expression of Ap‐Vas proteins in aphids and flies reveals their evolutionary roles in insects

Insect Molecular Biology, Volume 35, Issue 3, Page 217-231, June 2026.
Duplication of vas genes is universally observed in aphids, and phylogenetic analysis indicates that this event predates the divergence of Aphididae and Phylloxeridae. Ap‐vas1 is germline‐specific, whereas Ap‐vas2–4 exhibit somatic expression, indicating functional divergence during aphid embryogenesis.
Gee‐Way Lin, Szu‐Chieh Wang, Charles E. Cook, Ming‐Der Lin, Chun‐che Chang   +4 more
wiley   +1 more source

Risk Factors for Tick‐Borne Diseases in Germany: A Scoping Review

Zoonoses and Public Health, Volume 73, Issue 4, Page 297-313, June 2026.
ABSTRACT Tick‐borne diseases (TBDs) have proliferated in Germany. The two most prevalent TBDs, Lyme‐borreliosis and tick‐borne encephalitis, can present with nonspecific symptoms and lead to serious neurological complications. To date, a review synthesising the risk factors of acquiring a TBD in Germany is missing.
Carolin Schlupp, Matthias Hans Belau
wiley   +1 more source