Results 41 to 50 of about 2,213 (203)

Volatile Compounds in Feathers of the Scarlet Macaw (Ara macao) Reflect Sex and Pair‐Bond Status

Integrative Zoology, EarlyView.
Scarlet macaws exhibit sex‐ and pair‐related differences in plumage volatile composition, with males showing greater chemical richness. Partnered individuals differ in specific compound classes, whereas no clear association with immune function was detected. These results support a potential role for olfactory cues in sexual and social communication in
Elisa Espartosa, Isabel Barja, José Martin, María del Carmen Hernández   +3 more
wiley   +1 more source

Crustacean intersexuality is feminisation without demasculinisation:implications for environmental toxicology [PDF]

, 2014
The dysfunction associated with intersexuality in vertebrates and molluscs is often a serious threat to ecosystems. Although poorly understood, crustacean intersexuality is associated with contamination and includes forms linked to increased sex-ratio ...
Ford, Alex, Gongda Yang (1343643), Amaia Green Etxabe (1343640), Yang, Gongda, Alex T. Ford (1343637), Stephen Short (1343634), Yasmin Guler (1343646), Peter Kille (93033), Short, Stephen, Guler, Yasmin, Ford, Alex T., Green Etxabe, Amaia, Kille, Peter   +12 more
core   +1 more source

Rewriting the intersex body: On the opera adaptation of Herculine Barbin’s Memoirs

JoSTrans: The Journal of Specialised Translation
Herculine Barbin’s memoirs, published by Foucault in 1978, are considered the first testimony of an intersex person. Barbin’s story has been adapted several times, including in a 19th-century German short story and in a 1985 French film.
Gonzalo Iturregui-Gallardo
doaj   +1 more source

Testing the Mediating Role of Social Interactions on the Relationship Between Age and Plumage Traits on Reproductive Success

Ethology, EarlyView.
This conceptual figure uses Directed Acyclic Graphs (DAG) to represent the hypothesized biological mechanism in which age and/or plumage traits affect reproductive success, and social interactions mediate these relationships. It highlights the predicted decomposition of (a) the total effect into the direct and indirect effects under scenarios of (b ...
Zachary M. Laubach, Kayleigh P. Keller, Rebecca J. Safran, Toshi Tsunekage, Iris I. Levin   +4 more
wiley   +1 more source

INTERSEXUAL FEMALES AND INTERSEXUALITY IN HABROBRACON

The Biological Bulletin, 1943
Nine female intersexes are described and compared with the one intersexual form previously known in Habrobracon, the fertile mutant type gynoid, a weakly intersexual male.These female intersexes proved sterile, having male heads and instincts and abortive ovaries.
openaire   +2 more sources

Intersex Across the Interstellar: The Andromeda Constellation in Medieval and Early Modern Astronomical and Astrological Treatises

Renaissance Studies, EarlyView.
ABSTRACT This article examines the iconography of the Andromeda constellation as an intersex figure within medieval and early modern astrological traditions. It focuses on the origins of this imagery in the thirteenth‐century astrological writings of Scot and its reappearance nearly three centuries later in Ratdolt's illustrated 1482 edition of Hyginus'
Bar Leshem
wiley   +1 more source

The variability of giraffe skull morphology

Journal of Anatomy, Volume 249, Issue 5, Page 1068-1086, November 2026.
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

The costs of extra‐pair behaviours in birds

Biological Reviews, Volume 101, Issue 5, Page 2300-2312, October 2026.
ABSTRACT Extra‐pair behaviours – reproductive behaviours, including those related to copulation and paternity of offspring, amongst animals outside of a social pair bond – have long intrigued behavioural ecologists, particularly from the female animal's perspective.
Jørgen S. Søraker, Jamie Dunning
wiley   +1 more source

The ambiguity of freemartinism diagnosis in cattle revealed by cytogenetic and molecular techniques

Czech Journal of Animal Science, 2004
Nineteen heifers and three male co-twins, originating from heterosexual twin pregnancies, were analysed with the use of cytogenetic and molecular techniques.
J. Nowacka, M. Switonski, M. Mackowski, E. Slota, A. Radko, T. Zabek, K. Urbaniak   +6 more
doaj   +1 more source

Weaponry Investment in the Socially Monogamous Snapping Shrimp Alpheus brasileiro (Decapoda: Alpheidae)

Acta Zoologica, Volume 107, Issue 4, Page 470-479, October 2026.
ABSTRACT Weapons are morphological structures used by animals in various contexts, especially in intra‐specific contests and visual displays. In snapping shrimps of the genus Alpheus, particularly the monogamous species Alpheus brasileiro, both sexes bear enlarged chelipeds, potentially conferring advantages in mate competition or territorial defence ...
Leonardo Moreira, Caio Santos Nogueira, Régis Augusto Pescinelli, Rogerio Caetano Costa   +3 more
wiley   +1 more source