Results 41 to 50 of about 922 (170)

Sexual selection and reproductive success in mesocosm populations of African annual killifish

Journal of Fish Biology, EarlyView.
Abstract Variation in individuals’ ability to obtain mates generates sexual selection, which typically acts more strongly on males and can produce pronounced differences in phenotypes between the sexes (i.e., sexual dimorphism). The dynamic of sexual selection and individual reproductive success is considerably affected by the availability of ...
Jakub Žák, Klára Mrkvová, Martin Reichard   +2 more
wiley   +1 more source

The variability of giraffe skull morphology

Journal of Anatomy, EarlyView.
What does giraffe skull shape tell us about their development and evolution? Abstract Giraffe (Giraffa spp.) are among the most unique and charismatic extant animals, largely due to their distinct morphology. The evolutionary and developmental origin of ossicones is a key factor in giraffid biology, yet other features building their characteristic head
Nikolaos Kargopoulos, Jesús Marugán‐Lobón, Anusuya Chinsamy‐Turan, Bernard R. Agwanda, Michael Butler Brown, Stephanie Fennessy, Sara Ferguson, Rigardt Hoffman, Fredrick Lala, Arthur Muneza, Ogeto Mwebi, Moses Otiende, Alice Petzold, Sven Winter, Abdoul Razack Moussa Zabeirou, Julian Fennessy   +15 more
wiley   +1 more source

Intersexuality in the holotype of Photina gracilis (Mantodea: Mantidae: Photininae) and its taxonomic implications

Zoologia (Curitiba), 2014
Parasitism by horsehair worms (Nematomorpha) in Mantodea is well known, but only a few cases of intersexuality were reported in the literature. In the present study, intersexuality of the holotype of Photina gracilis Giglio-Tos, 1915 is documented as a ...
Antonio A. Agudelo R.
doaj   +1 more source

Exploring drivers and costs of partial trans‐Saharan migration in juvenile vultures

Ibis, Volume 168, Issue 3, Page 1085-1099, July 2026.
Partial migration occurs when only a subset of individuals within a population undertakes a migratory journey. The decision to migrate can be influenced by intrinsic traits (e.g. sex or physical condition) as well as by extrinsic factors (e.g. social environment or resource availability).
Eneko Arrondo, Ana Sanz‐Aguilar, Andrea Santangeli, Manuel De La Riva, David Serrano, Ainara Cortés‐Avizanda, Olivier Duriez, Juan Manuel Pérez‐García, José Antonio Sanchez‐Zapata, Martina Carrete, Juan Oltra, Antoni Margalida, Pilar Oliva‐Vidal, Guillermo Blanco, Oscar Frías, Félix Martínez, José Luis González‐Del Barrio, José María Martínez, José Antonio Donázar   +18 more
wiley   +1 more source

Stuck in between: First case of transverse intersexuality in Trochosa cachetiensis Mcheidze, 1997 (Araneae, Lycosidae) from Georgia [PDF]

Caucasiana
The first illustrated description of transverse intersexuality in Trochosa cachetiensis Mcheidze, 1997, from Georgia, is provided. In this specimen, both male (palpal bulbs) and female (epigyne) structures are underdeveloped.
Armen Seropian
doaj   +3 more sources

Females Fly Further—Sex‐Specific and Seasonal Differences in Migration Patterns of Pied Avocets

Ecology and Evolution, Volume 16, Issue 6, June 2026.
GPS tracking of 122 pied avocets revealed pronounced sex‐ and season‐specific migration strategies, with females migrating further than males, while spring migration was faster and more fragmented than autumn migration. Avocets spent a substantial part of their annual cycle in the Wadden Sea during the post‐breeding period before starting migration to ...
Mads Eskildsen, Stefan Garthe, Sjoerd Duijns, Petra Manche, Dominik Marchowski, Łukasz Jankowiak, Marcin Sidelnik, Philipp Schwemmer   +7 more
wiley   +1 more source

Making intersexuality visible through the circulation of Lucia Puenzo's XXY

La Manzana de la Discordia, 2016
This article looks at how the film XXY (Lucía Puenzo, 2007) makes intersexuality visible and transmits to the public identities that question the binaries man-woman and homo-hetero by means of its circulation. By acknowledging the challenges of assessing
Amaya Bañuelos Marco
doaj   +1 more source

Variations in Sexual Size Dimorphism in Two Anurans Along an Urbanization Gradient in Shanghai: Assessment of Rensch's Rule

Ecology and Evolution, Volume 16, Issue 6, June 2026.
ABSTRACT Variations in sexual size dimorphism (SSD) have important consequences for animal ecology, behavior, population dynamics, and the evolution of life‐history traits, and can be explained by many intraspecific and interpopulation hypotheses. Urbanization is an important factor that affects anuran phenotypic characteristics (including morphology),
Ben Li, Ningning Liu, Shurong Zhong, Tianhou Wang, Rongquan Zheng, Qing Song, Zhenghuan Wang, Wei Zhang   +7 more
wiley   +1 more source

Factors Affecting Multiple Paternity: Insights From the Eastern Quoll (Dasyurus viverrinus)

Ecology and Evolution, Volume 16, Issue 5, May 2026.
Eastern quolls (Dasyurus viverrinus) exhibit multiple paternity in approximately half of all litters. Reproductive success is correlated with heavier weight, youth, and being black rather than fawn colour morph. A cross‐species analysis indicates that high rates of multiple paternity within the Dasyuridae area correlated with shorter lifespan and ...
Brittany M. Brockett, Linda E. Neaves, Maldwyn J. Evans, Iain J. Gordon, Jennifer C. Pierson, Belinda A. Wilson, Claire Wimpenny, Adrian D. Manning   +7 more
wiley   +1 more source

Habitat‐Driven Sexual Dimorphism in Triplophysa strauchii Between Oxbow Lake and Stream: A Geometric Morphometric Analysis

Ecology and Evolution, Volume 16, Issue 5, May 2026.
The combined effects of sexual selection and natural selection give rise to sexual dimorphism in operculum and eye morphology of T. strauchii across the two river basins. And our study reveal the fine‐scale responses of fish sexual dimorphism to diverse selective forces.
Yan Li, Ya‐Han Meng, Wei‐Zhen Gao, Lei Shi   +3 more
wiley   +1 more source