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Type: Journal article
Title: Exceptional sperm cooperation in the wood mouse
Author: Moore, H.
Dvorakova, K.
Jenkins, N.
Breed, W.
Citation: Nature, 2002; 418(6894):174-177
Publisher: MacMillan Publishers Ltd
Issue Date: 2002
ISSN: 0028-0836
Statement of
Harry Moore, Katerina Dvoráková, Nicholas Jenkins and William Breed
Abstract: Spermatozoa from a single male will compete for fertilization of ova with spermatozoa from another male when present in the female reproductive tract at the same time1. Close genetic relatedness predisposes individuals towards altruism, and as haploid germ cells of an ejaculate will have genotypic similarity of 50%, it is predicted that spermatozoa may display cooperation and altruism to gain an advantage when inter-male sperm competition is intense2. We report here the probable altruistic behaviour of spermatozoa in an eutherian mammal. Spermatozoa of the common wood mouse, Apodemus sylvaticus, displayed a unique morphological transformation resulting in cooperation in distinctive aggregations or 'trains' of hundreds or thousands of cells, which significantly increased sperm progressive motility. Eventual dispersal of sperm trains was associated with most of the spermatozoa undergoing a premature acrosome reaction. Cells undergoing an acrosome reaction in aggregations remote from the egg are altruistic in that they help sperm transport to the egg but compromise their own fertilizing ability.
Keywords: Spermatozoa
Sperm Head
Cell Aggregation
Sperm Motility
Cell Size
Acrosome Reaction
Models, Biological
Description: Copyright © 2002 Nature Publishing Group
DOI: 10.1038/nature00832
Published version:
Appears in Collections:Anatomical Sciences publications
Aurora harvest
Environment Institute publications

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