Results 111 to 120 of about 67,350 (184)

Sperm competition experiments reveal low prezygotic postmating isolation between parasitic and nonparasitic lamprey ecotypes. [PDF]

Ecol Evol, 2023
Decanter N, Normand R, Souissi A, Labbé C, Edeline E, Evanno G.   +5 more
europepmc   +1 more source

Sperm competition in yellow dung flies: No consistent effect of sperm size. [PDF]

J Evol Biol, 2022
Laugen AT, Hosken DJ, Reinhold K, Schwarzenbach GA, Hoeck PEA, Bussière LF, Blanckenhorn WU, Lüpold S.   +7 more
europepmc   +1 more source

Sperm tendency to agglutinate in motile bundles in relation to sperm competition and fertility duration in chickens. [PDF]

Sci Rep, 2022
Sayed MAM, Abd-Elhafeez HH, Afifi OS, Marzouk MW, El-Sherry TM.   +4 more
europepmc   +1 more source

Testes size, testosterone production and reproductive behaviour in a natural mammalian mating system [PDF]

, 2012
1. Testosterone (T) is a key mediator in the expression of numerous morphological and behavioural traits in mammals, but the factors underlying individual variation in circulating T levels are poorly understood. 2.
Lincoln, Gerald A., Monfort, Steven L., Pilkington, Jill G., Preston, Brian T., Stevenson, Ian R., Wilson, Kenneth   +5 more
core  

Paternity bias and cryptic female choice in chickens

Poultry Science
: Sperm competition and cryptic female choice (CFC) are 2 significant mechanisms of postcopulatory sexual selection that greatly impact fertilization success in various species.
Qunpu Wang, Bin Wang, Junying Li, Congjiao Sun, Ning Yang, Chaoliang Wen   +5 more
doaj   +1 more source

Sperm Competition Risk: The Connections That Partner Attractiveness and Infidelity Risk Have with Mate Retention Behaviors and Semen-Displacing Behaviors. [PDF]

Evol Psychol, 2023
Vance G, Zeigler-Hill V, Shackelford TK.
europepmc   +1 more source

Divergent natural selection alters male sperm competition success in Drosophila melanogaster. [PDF]

Ecol Evol, 2022
Dobler R, Charette M, Kaplan K, Turnell BR, Reinhardt K.   +4 more
europepmc   +1 more source

Testis size depends on social status and the presence of male helpers in the cooperatively breeding cichlid Julidochromis ornatus [PDF]

, 2017
Cooperatively breeding animals, in which helpers may participate in reproduction with dominant breeders, are ideal species for examining intraspecific variation in testis size because they often exhibit both monogamous breeding (low risk of sperm ...
Awata, Satoshi, Heg, Dik, Kohda, Masanori, Munehara, Hiroyuki   +3 more
core  

First evidence for backcrossing of F₁ hybrids in Acropora corals under sperm competition. [PDF]

Sci Rep, 2022
Kitanobo S, Iwao K, Fukami H, Isomura N, Morita M.   +4 more
europepmc   +1 more source

Sperm competition favours intermediate sperm size in a hermaphrodite

, 2023
Santhosh S, Ebert D, Janicke T.
europepmc   +1 more source