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Sexual selection and sperm quantity: meta-analyses of strategic ejaculation

Kelly, Clint; Jennions, Michael

Description

Multiple mating or group spawning leads to post-copulatory sexual selection, which generally favours ejaculates that are more competitive under sperm competition. In four meta-analyses we quantify the evidence that sperm competition (SC) favours greater sperm number using data from studies of strategic ejaculation. Differential investment into each ejaculate emerges at the individual level if males exhibit phenotypic plasticity in ejaculate properties in response to the likely risk and/or...[Show more]

dc.contributor.authorKelly, Clint
dc.contributor.authorJennions, Michael
dc.date.accessioned2015-12-10T23:12:35Z
dc.identifier.issn1464-7931
dc.identifier.urihttp://hdl.handle.net/1885/64047
dc.description.abstractMultiple mating or group spawning leads to post-copulatory sexual selection, which generally favours ejaculates that are more competitive under sperm competition. In four meta-analyses we quantify the evidence that sperm competition (SC) favours greater sperm number using data from studies of strategic ejaculation. Differential investment into each ejaculate emerges at the individual level if males exhibit phenotypic plasticity in ejaculate properties in response to the likely risk and/or intensity of sperm competition after a given mating. Over the last twenty years, a series of theoretical models have been developed that predict how ejaculate size will be strategically adjusted in relation to: (a) the number of immediate rival males, with a distinction made between 0 versus 1 rival ('risk' of SC) and 1 versus several rivals ('intensity' of SC); (b) female mating status (virgin or previously mated); and
dc.publisherCambridge University Press
dc.sourceBiological Reviews
dc.subjectKeywords: animal; article; female; male; meta analysis; physiology; reproduction; sexual behavior; spermatozoon; Animals; Female; Male; Reproduction; Sexual Behavior, Animal; Spermatozoa Ejaculate size; Mate choice; Mating rate; Multiple mating; Polyandry; Sexual selection; Sperm competition; Sperm longevity; Sperm size; Sperm viability
dc.titleSexual selection and sperm quantity: meta-analyses of strategic ejaculation
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume86
dc.date.issued2011
local.identifier.absfor060201 - Behavioural Ecology
local.identifier.ariespublicationu9511635xPUB880
local.type.statusPublished Version
local.contributor.affiliationKelly, Clint, Iowa State University
local.contributor.affiliationJennions, Michael, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage863
local.bibliographicCitation.lastpage884
local.identifier.doi10.1111/j.1469-185X.2011.00175.x
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2016-02-24T12:09:04Z
local.identifier.scopusID2-s2.0-80053987445
local.identifier.thomsonID000296475300007
CollectionsANU Research Publications

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