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Polyspermy prevention in marine invertebrates

✍ Scribed by Meredith C. Gould; Jose Luis Stephano

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
256 KB
Volume
61
Category
Article
ISSN
1059-910X

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✦ Synopsis

Abstract

In marine invertebrates, as in most other organisms, normal development requires that only one sperm nucleus joins with the egg nucleus at fertilization. The principal mechanisms employed are (1) prevention of sperm‐egg plasma membrane fusion and (2) modifications of the egg extracellular coat to prevent sperm binding and/or penetration. In a third strategy, fertilization is polyspermic, but only one sperm nucleus fuses with the egg nucleus. Other factors such as gamete density during spawning, chemotaxis, and localized sites for sperm entry may also affect the numbers of sperm reaching the egg. Microsc. Res. Tech. 61:379–388, 2003. Β© 2003 Wiley‐Liss, Inc.

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