Results 31 to 40 of about 1,104,726 (307)
Postcopulatory sexual selection results in spermatozoa with more uniform head and flagellum sizes in rodents. [PDF]
PLoS ONE, 2014 Interspecific comparative studies have shown that, in most taxa, postcopulatory sexual selection (PCSS) in the form of sperm competition drives the evolution of longer and faster swimming sperm.
María Varea-Sánchez +3 more
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By hook or by crook? Morphometry, competition and cooperation in rodent sperm. [PDF]
PLoS ONE, 2007 BACKGROUND: Sperm design varies enormously across species and sperm competition is thought to be a major factor influencing this variation. However, the functional significance of many sperm traits is still poorly understood.
Simone Immler +3 more
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The hidden ageing costs of sperm competition.
Ecology Letters, 2020 Ageing and sexual selection are intimately linked. There is by now compelling evidence from studies performed across diverse organisms that males allocating resources to mating competition incur substantial physiological costs, ultimately increasing ...
J. Lemaitre, J. Gaillard, S. A. Ramm
semanticscholar +1 more source
Sperm competition selects for sperm quantity and quality in the Australian Maluridae.
PLoS ONE, 2011 When ejaculates from rival males compete for fertilization, there is strong selection for sperm traits that enhance fertilization success. Sperm quantity is one such trait, and numerous studies have demonstrated a positive association between sperm ...
Melissah Rowe, Stephen Pruett-Jones
doaj +1 more source
Evolution; international journal of organic evolution, 2016 Amy L. Dapper, Michael J. Wade
openalex +2 more sources
Cells, 2021 Mammals exhibit a tremendous amount of variation in sperm morphology and despite the acknowledgement of sperm structural diversity across taxa, its functional significance remains poorly understood. Of particular interest is the sperm of rodents.
Kristin A. Hook +2 more
doaj +1 more source
Metabolic rate limits the effect of sperm competition on mammalian spermatogenesis.
PLoS ONE, 2013 Sperm competition leads to increased sperm production in many taxa. This response may result from increases in testes size, changes in testicular architecture or changes in the kinetics of spermatogenesis, but the impact of each one of these processes on
Javier delBarco-Trillo +2 more
doaj +1 more source
Sperm competition and the evolution of sperm design in mammals
BMC Evolutionary Biology, 2011 Background The influence of sperm competition upon sperm size has been a controversial issue during the last 20 years which remains unresolved for mammals.
Gomendio Montserrat +2 more
doaj +1 more source
Testes mass, but not sperm length, increases with higher levels of polyandry in an ancient sex model. [PDF]
PLoS ONE, 2014 There is strong evidence that polyandrous taxa have evolved relatively larger testes than monogamous relatives. Sperm size may either increase or decrease across species with the risk or intensity of sperm competition.
David E Vrech +3 more
doaj +1 more source
Do Men Produce Higher Quality Ejaculates When Primed With Thoughts of Partner Infidelity?
Evolutionary Psychology, 2018 Sperm competition theory can be used to generate the hypothesis that men alter the quality of their ejaculates as a function of sperm competition risk.
Michael N. Pham +10 more
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