Results 61 to 70 of about 5,713 (198)

Sex‐Specific Control and Incomplete Matings: Sperm Removal Behavior in a Bush Cricket Species

Ethology, Volume 132, Issue 3, Page 194-203, March 2026.
In this study, we investigated which sex influences the duration of sperm removal behaviour (SRB) in the ornate bush cricket, Metaplastes ornatus. Female traits showed a weak effect on SRB duration, and lighter females mated more frequently. Frequent unsuccessful mating terminations shortened SRB indicating high level of sexual conflict.
Chiara Flaskamp, Klaus Reinhold, Tuba Rizvi   +2 more
wiley   +1 more source

New records of intersexuality in porcelain crabs (Crustacea: Decapoda: Anomura: Porcellanidae)

Nauplius, 2018
The occurrence of intersex specimens of Lissoporcellana quadrilobata (Miers, 1884), Pisidia bluteli (Risso, 1816) and Pisidia longimana (Risso, 1816) is recorded for the first time and their secondary sexual characters analyzed.
Luciane Augusto de Azevedo Ferreira
doaj   +1 more source

Selection Against Hybrids Maintains Genetic Divergence Between Populations of a Coastal Cleaner Fish Translocated Across a Genetic Break

Evolutionary Applications, Volume 19, Issue 3, March 2026.
ABSTRACT Genetic divergence between populations and/or species is mainly driven by reproductive isolation, that is, reduced gene flow, due to either pre‐ and/or postzygotic barriers. In this study, we investigate the role of (i) reproductive ecological interactions and (ii) mechanisms of evolutionary isolation between two genetically differentiated ...
Enrique Blanco Gonzalez, Per Erik Jorde, Sissel Jentoft, Joana Isabel Robalo, Mana Naito   +4 more
wiley   +1 more source

Discovery of sexual dimorphism of the laryngeal sac in the common minke whale Balaenoptera acutorostrata

The Anatomical Record, Volume 309, Issue 2, Page 397-416, February 2026.
Abstract Mysticetes, or baleen whales, have an air sac on the ventral surface of the larynx known as the “laryngeal sac.” The primary hypothesis regarding this structure's function is that it is involved in sound production. However, several other functions have been proposed, including air recycling, air storage, and even buoyancy control.
Gen Nakamura, Hiroko Yamada, Ayumi Hirose, Hikari Maeda, Joy S. Reidenberg, Hidehiro Kato, Shinho Park, Yoshihiro Fujise   +7 more
wiley   +1 more source

The Effect of Differing Levels of Intrasexual and Intersexual Selection on Survival and Reproduction Under a Heatwave

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Precopulatory mating behaviour, are important for fitness and can be disrupted by heatwave's. Here we assess how differing levels of intrasexual and intrasexual selection in precopulatory mating behaviours impacts fitness responses to heatwaves. We find that the likelihood of having a brood is impacted by differences in intrasexual and intersexual ...
Karendeep K. Sidhu, Paul Caplat, Greta Bocedi, Natalie Pilakouta, Lesley Lancaster   +4 more
wiley   +1 more source

Rapid Gamete Maturation and Social Modulation Shape Reproductive Dynamics in a Brood Parasitic Catfish

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Obligatory brood parasitism in the Lake Tanganyika cuckoo catfish requires rapid reproductive readiness to exploit unpredictable host spawning. Our experiments showed that males are almost continuously ready to reproduce, while females ovulate about once a week, with social interactions enhancing gamete maturation in both sexes.
Holger Zimmermann, Radim Blažek, Matej Polačik, Anna Bryjová, Lukas Koch, Martin Reichard   +5 more
wiley   +1 more source

New Cases of Teratology, Albinism, Abnormal Pigmentation, Gynandromorphism, and Injury Healing in Scorpions (Arachnida: Scorpiones)

Arthropoda
Eighteen new cases of teratology and other abnormalities within scorpions are presented, representing new cases of metasomal duplication, mesosomal anomaly, telson anomaly, albinism, and abnormal pigmentation.
Danniella Sherwood, Victoria Tang, Julien Tchilinguirian, Ludivine Lamare, Seth Croffy, Mark Stockmann, Jay Keller, Valerio Gerace   +7 more
doaj   +1 more source

A sexual shift induced by silencing of a single insulin-like gene in crayfish: ovarian upregulation and testicular degeneration.

PLoS ONE, 2010
In sequential hermaphrodites, intersexuality occurs naturally, usually as a transition state during sexual re-differentiation processes. In crustaceans, male sexual differentiation is controlled by the male-specific androgenic gland (AG).
Ohad Rosen, Rivka Manor, Simy Weil, Ohad Gafni, Assaf Linial, Eliahu D Aflalo, Tomer Ventura, Amir Sagi   +7 more
doaj   +1 more source

The Queer Truth

, 2013
I remember learning about intersexuality (then called hermaphrodism) for the first time in my health class when I was twelve years old. In that lesson, my teacher mentioned that when a child is born intersex, the parents will likely choose a binary sex ...
Broe, Chelsea E.
core  

Polymorphisms in DMRT1 coding and promoter regions are probably not causative for swine sex reversal (XX, SRY-negative) syndrome [PDF]

, 2011
SRY-negative XX sex reversal is an inherited or sporadically occurring disorder, where testis development appears in the absence of the SRY gene. Although the molecular background of this intersexuality syndrome in pigs is unknown, it was proposed that ...
Bratuś, A, Klukowska-Rötzler, J, Neuenschwander, S, Piestrzyńska-Kajtoch, A, Słota, E, Świtoński, M   +5 more
core   +1 more source