Work

Larger sperm outcompete smaller sperm in the nematode Caenorhabditis elegans

Year: 1998

Type: article

Abstract: Sperm competition is generally thought to drive the evolution of sperm miniaturization. Males gain advantage by transferring more sperm, which they produce by dividing limited resources into ever smaller cells. Here, we describe the opposite effect of size on the competitiveness of amoeboid sperm in the hermaphroditic nematode Caenorhabditis elegans. Larger sperm crawled faster and displaced smaller sperm, taking precedence at fertilization. Larger sperm took longer to produce, however, and so were more costly than smaller sperm. Our results provide evidence of a mechanism to support recent theoretical and comparative studies that suggest sperm competition can favour not small, but large sperm.

Source: Proceedings of the Royal Society B Biological Sciences

DOI: 10.1098/rspb.1998.0531

Authors: C. W. LaMunyon, S. Ward

Institution: University of Arizona

Language: English

Topic: Animal Behavior and Reproduction

Subfield: Ecology, Evolution, Behavior and Systematics

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: green

Funders: McKnight Foundation, National Institutes of Health, National Institute on Aging

Awards: LIFESPAN ENHANCING MUTATIONS IN C ELEGANS, G4024867536