Results 41 to 50 of about 655 (157)

Clinal Variation in Reproductive Modes and Offspring Body Condition Across a Contact Zone of a Bimodal Viviparous Salamander

Ecology and Evolution, Volume 16, Issue 3, March 2026.
We examined clinal gradients in reproductive modes and associated offspring body condition across a hybrid zone between two bimodal viviparous subspecies of Salamandra salamandra. We found a clear cline in reproductive modes, with pure modes at the extremes and mixed modes in central populations.
Clara Figueiredo‐Vázquez, Lucía Alarcón‐Ríos, Guillermo Velo‐Antón   +2 more
wiley   +1 more source

Embryos of the viviparous dermapteran, Arixenia esau develop sequentially in two compartments: terminal ovarian follicles and the uterus.

PLoS ONE, 2013
Three main reproductive strategies have been described among insects: most common oviparity, ovoviviparity and viviparity. In the latter strategy, the embryonic development takes place within the body of the mother which provides gas exchange and ...
Waclaw Tworzydlo, Elzbieta Kisiel, Szczepan M Bilinski   +2 more
doaj   +1 more source

Bridging the gap: improving methodologies for future avian microbiome research

Journal of Avian Biology, Volume 2026, Issue 2, March 2026.
Recent advances in the field of wild avian microbiome research have significantly deepened our understanding of the eco‐evolutionary dynamics of bird–microbe interactions. Consequently, the field is now approaching a pivotal moment in uncovering the ultimate factors shaping avian microbiome structure, especially in relation to birds' ecological ...
Charli S. Davies, Pablo Capilla‐Lasheras, Elena Catelan‐Carphio, Alejandro Corregidor‐ Castro, David Diez‐Méndez, Szymon M. Drobniak, Joanna Drzewińska‐Chańko, Kevin D. Kohl, Ester Martínez‐Renau, Samuele Ramellini, David S. Richardson, Suvi Ruuskanen, Alex O. Sutton, Marta Szulkin, Camille A. Troisi, Joël White, Sarah F. Worsley, Kasun H. Bodawatta, Elin Videvall   +18 more
wiley   +1 more source

Highly localised morphological diversity in the mayfly Cloeon tasmaniae Tillyard (Ephemeroptera; Baetidae), and a new synonomy with C. paradieniense Suter

Austral Entomology, Volume 65, Issue 1, February 2026.
Abstract Ambiguity over the features that differentiate two nominal species of baetid mayflies, Cloeon paradieniense Suter and C. tasmaniae Tillyard, in southeast Australia led to a detailed analysis of the morphology and meristics of specimens from Victoria, South Australia and, in particular, Tasmania, where both species have been reported.
Ronald E. Thresher, Phillip J. Suter
wiley   +1 more source

Reproductive biology of the skates Sympterygia acuta Garman, 1877 and S. bonapartii Müller & Henle, 1841 (Chondrichthyes: Rajoidei) in south Brazil

Neotropical Ichthyology
The present study analyzed the sexual development, sizes at maturity and morphometric relationships for both sexes of Sympterygia acutaand S. bonapartii, endemic of south-western Atlantic Ocean.
Alexander Basallo, Maria Cristina Oddone
doaj   +1 more source

The Overlooked Threat of Global Warming on Elasmobranch Fertility

Fish and Fisheries, Volume 27, Issue 1, Page 41-55, January 2026.
ABSTRACT Climate change is increasingly recognised as a critical threat to global biodiversity, yet its impacts on reproductive processes remain poorly understood in many marine taxa. Elasmobranchs (sharks, skates and rays) represent a particularly vulnerable group due to their peculiar life histories, low fecundity, and diverse reproductive modes.
Noémie Coulon, Eric Feunteun, Alexandre Carpentier, Anne Lizé   +3 more
wiley   +1 more source

Evidence of dystocia in an oviparous shark

Journal of Fish Biology
AbstractDystocia, or obstructed labor, is a well‐documented phenomenon in various captive vertebrates, including fish. However, despite the documentation of dystocia in several viviparous (live‐bearing) Chondrichthyan species (i.e., sharks, rays, skates, and chimaeras), there are no reports to date of dystocia in any oviparous (egg‐laying) species ...
Carolyn R. Wheeler, Jodie L. Rummer
openaire   +3 more sources

Demography Meets Climate Change: Life History Challenges for a Neotropical Viviparous Lizard

Ecology and Evolution, Volume 15, Issue 12, December 2025.
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.
Maria Luiza Gonçalves Santos, Heitor Campos de Sousa, Laís Pio Caetano Machado, Guarino Rinaldi Colli   +3 more
wiley   +1 more source

Gestation alters the gut microbiota of an oviparous lizard

FEMS Microbiology Ecology, 2019
ABSTRACTMammalian pregnancy can alter the diversity, membership and structure of the maternal gut microbiota, but it is unclear whether this phenomenon occurs in vertebrates with different reproductive strategies. We conducted 16S rRNA bacterial inventories to investigate whether oviparous lizards exhibit shifts in gut microbiota similar to those ...
Brian K Trevelline, Kirsty J MacLeod, Tracy Langkilde, Kevin D Kohl   +3 more
openaire   +2 more sources

Changing Feeding Levels Reveal Plasticity in Elasmobranch Life History Strategies

Ecology Letters, Volume 28, Issue 9, September 2025.
We analysed life history traits of 151 elasmobranch species for two contrasting feeding levels in a principal components analysis. Two axes, reproductive output and generation turnover, structure elasmobranch life history strategies. Wefound that species' positions in this life history space are dynamic, shifting towards higher reproductive output as ...
Sol Lucas, Per Berggren, Ellen Barrowclift, Isabel M. Smallegange   +3 more
wiley   +1 more source