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Article

Intraspecific variation in sperm length is negatively related to sperm competition in passerine birds.

Evolution; international journal of organic evolution - 1 Feb 2008

Kleven Oddmund, Laskemoen Terje, Fossøy Frode, Robertson Raleigh J, Lifjeld Jan T

Abstract excerpt

Spermatozoa are among the most diversified cells in the animal kingdom, but the underlying evolutionary forces affecting intraspecific variation in sperm morphology are poorly understood. It has been hypothesized that sperm competition is a potent selection pressure on sperm variation within spec...

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Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

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Source

Identifiers

PMID: 18070085
DOI: 10.1111/j.1558-5646.2007.00287.x

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 2 Sept 2026. Prepared record publication-18070085-2026-09-02.2. Manifest publication-graph-cohort-2026-09-02.2.

Source receipt: PubMed via Helena Literature Corpus, retrieved 2 Sept 2026.

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