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Recovery of Sperm Activity After Osmotic Shock in the Three-Spined Stickleback: Implications for Pre-Oviposition Ejaculation

Recovery of Sperm Activity After Osmotic Shock in the Three-Spined Stickleback: Implications for... RECOVERY OF SPERM ACTIVITY AFTER OSMOTIC SHOCK IN THE THREE-SPINED STICKLEBACK: IMPLICATIONS FOR PRE-OVIPOSITION EJACULATION by S.C. LE COMBER 1,2) , C.G. FAULKES 1) , K.J.W. VAN LOOK 3) , W.V. HOLT 3) and C. SMITH 1,4,5) ( 1 School of Biological Sciences, Queen Mary, University of London, London EI 4NS, UK; 3 Institute of Zoology, Zoological Society of London, Regent’s Park, London NWI 4RY, UK; 4 Department of Biology, University of Leicester, University Road, Leicester LEI 7RH, UK) (Acc. 28-IX-2004) Summary Pre-oviposition ejaculation is known to occur in the three-spined stickleback and may help to determine fertilisation success when sperm competition occurs as a consequence of males adopting alternative mating tactics. However, fish sperm typically show a rapid reduction in motility after exposure to fresh water, which would appear to limit the utility of such a strategy. Here, we use computer-assisted sperm analysis (CASA) to examine changes in stickleback sperm motion over time in fresh water, showing for the first time that this reduc- tion in motility can be reversed by an increase in osmolality. We consider the possibility that ovarian fluid may have the same effect, and suggest that pre-oviposition ejaculation may be associated with higher fertilisation http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Recovery of Sperm Activity After Osmotic Shock in the Three-Spined Stickleback: Implications for Pre-Oviposition Ejaculation

Le Comber,; Faulkes,; Van Look,; Holt,; Smith,
Behaviour , Volume 141 (11-12): 15 – Jan 1, 2004
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References (40)

Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/1568539042948169
Publisher site
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Abstract

RECOVERY OF SPERM ACTIVITY AFTER OSMOTIC SHOCK IN THE THREE-SPINED STICKLEBACK: IMPLICATIONS FOR PRE-OVIPOSITION EJACULATION by S.C. LE COMBER 1,2) , C.G. FAULKES 1) , K.J.W. VAN LOOK 3) , W.V. HOLT 3) and C. SMITH 1,4,5) ( 1 School of Biological Sciences, Queen Mary, University of London, London EI 4NS, UK; 3 Institute of Zoology, Zoological Society of London, Regent’s Park, London NWI 4RY, UK; 4 Department of Biology, University of Leicester, University Road, Leicester LEI 7RH, UK) (Acc. 28-IX-2004) Summary Pre-oviposition ejaculation is known to occur in the three-spined stickleback and may help to determine fertilisation success when sperm competition occurs as a consequence of males adopting alternative mating tactics. However, fish sperm typically show a rapid reduction in motility after exposure to fresh water, which would appear to limit the utility of such a strategy. Here, we use computer-assisted sperm analysis (CASA) to examine changes in stickleback sperm motion over time in fresh water, showing for the first time that this reduc- tion in motility can be reversed by an increase in osmolality. We consider the possibility that ovarian fluid may have the same effect, and suggest that pre-oviposition ejaculation may be associated with higher fertilisation

Journal

Behaviour – Brill

Published: Jan 1, 2004

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