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A proposal and case study towards a conceptual approach of validating sperm competition in common carp ( Cyprinus carpio L.), with practical implications for hatchery procedures

A proposal and case study towards a conceptual approach of validating sperm competition in common... It has been postulated that sperm competition during the process of fertilization can be considered as part of a mechanism involved in sexual selection that occurs in a wide range of animals ( Birkhead and Møller, 1998 ; Birkhead and Pizzari, 2002 ). This common phenomenon has an important effect on the reproductive behaviour in many species, including fish with external and internal fertilization. Parker (1970) defined sperm phenomenon as ‘ competition with a single female between the sperm from two or more males for the fertilization of ova ’. More recently he re‐defined it as ‘ competition between the sperm from two or more males for the fertilization of a given set of ova ’ ( Parker, 1998 ). Furthermore, Parker et al. (1996) also distinguished between the risk involved in and the intensity effect of sperm competition. The risk of sperm competition refers to the probability that during spawning a male will spawn simultaneously with at least one other male competing for a batch of eggs, whereas the intensity of sperm competition refers to the total number of males whose sperm are competing for a batch of eggs. Sperm competition in fish, especially those with external http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ichthyology Wiley

A proposal and case study towards a conceptual approach of validating sperm competition in common carp ( Cyprinus carpio L.), with practical implications for hatchery procedures

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Publisher
Wiley
Copyright
© 2008 The Authors. Journal compilation © 2008 Blackwell Verlag, Berlin
ISSN
0175-8659
eISSN
1439-0426
DOI
10.1111/j.1439-0426.2008.01148.x
Publisher site
See Article on Publisher Site

Abstract

It has been postulated that sperm competition during the process of fertilization can be considered as part of a mechanism involved in sexual selection that occurs in a wide range of animals ( Birkhead and Møller, 1998 ; Birkhead and Pizzari, 2002 ). This common phenomenon has an important effect on the reproductive behaviour in many species, including fish with external and internal fertilization. Parker (1970) defined sperm phenomenon as ‘ competition with a single female between the sperm from two or more males for the fertilization of ova ’. More recently he re‐defined it as ‘ competition between the sperm from two or more males for the fertilization of a given set of ova ’ ( Parker, 1998 ). Furthermore, Parker et al. (1996) also distinguished between the risk involved in and the intensity effect of sperm competition. The risk of sperm competition refers to the probability that during spawning a male will spawn simultaneously with at least one other male competing for a batch of eggs, whereas the intensity of sperm competition refers to the total number of males whose sperm are competing for a batch of eggs. Sperm competition in fish, especially those with external

Journal

Journal of Applied Ichthyology – Wiley

Published: Aug 1, 2008

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