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Skipped spawning in female iteroparous fishes

Identifieur interne : 000259 ( Istex/Corpus ); précédent : 000258; suivant : 000260

Skipped spawning in female iteroparous fishes

Auteurs : Rick M. Rideout ; George A. Rose ; Margaret P M. Burton

Source :

RBID : ISTEX:E458B6BF1575CAB30E605CE634F811A330ECDC8A

English descriptors

Abstract

It is often assumed that iteroparous fishes spawn annually once reaching sexual maturity, but this is not always the case. This paper reviews available information on skipped spawning in female teleost fishes. All instances of non‐annual spawning are described as one of three types (retaining, reabsorbing, resting), depending on where in the normal spawning cycle development has been interrupted. Retaining ripe eggs is caused by conditions experienced during the spawning season (fish density, mate availability, pollution), whereas failure to start vitellogenesis (resting) or the breakdown of all oocytes that enter into vitellogenesis (reabsorbing) is caused by factors experienced prior to the spawning season (primarily temperature and poor nutrition). It is speculated that the relative shortage of data on non‐annual spawning may be because of difficulties in identifying non‐reproductive individuals. In an attempt to rectify this situation, the criteria needed to identify females undergoing the three forms of spawning omission are presented in terms of external appearance of gonads, gonad indices, and histological analysis. The energy saved by not spawning in a poor year may lead to increased survival and the probability of spawning in subsequent years. As the cumulative number of progeny gained by surviving to spawn in multiple subsequent years outweighs the number of progeny lost by not spawning in a given single year, occasional omission of spawning may constitute an adaptive trait in long‐lived iteroparous fishes.

Url:
DOI: 10.1111/j.1467-2679.2005.00174.x

Links to Exploration step

ISTEX:E458B6BF1575CAB30E605CE634F811A330ECDC8A

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<abstract lang="en">It is often assumed that iteroparous fishes spawn annually once reaching sexual maturity, but this is not always the case. This paper reviews available information on skipped spawning in female teleost fishes. All instances of non‐annual spawning are described as one of three types (retaining, reabsorbing, resting), depending on where in the normal spawning cycle development has been interrupted. Retaining ripe eggs is caused by conditions experienced during the spawning season (fish density, mate availability, pollution), whereas failure to start vitellogenesis (resting) or the breakdown of all oocytes that enter into vitellogenesis (reabsorbing) is caused by factors experienced prior to the spawning season (primarily temperature and poor nutrition). It is speculated that the relative shortage of data on non‐annual spawning may be because of difficulties in identifying non‐reproductive individuals. In an attempt to rectify this situation, the criteria needed to identify females undergoing the three forms of spawning omission are presented in terms of external appearance of gonads, gonad indices, and histological analysis. The energy saved by not spawning in a poor year may lead to increased survival and the probability of spawning in subsequent years. As the cumulative number of progeny gained by surviving to spawn in multiple subsequent years outweighs the number of progeny lost by not spawning in a given single year, occasional omission of spawning may constitute an adaptive trait in long‐lived iteroparous fishes.</abstract>
<subject lang="en">
<genre>Keywords</genre>
<topic>non‐reproductive</topic>
<topic>recruitment</topic>
<topic>reproductive potential</topic>
<topic>spawning omission</topic>
<topic>spawning potential</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Fish and Fisheries</title>
</titleInfo>
<identifier type="ISSN">1467-2960</identifier>
<identifier type="eISSN">1467-2979</identifier>
<identifier type="DOI">10.1111/(ISSN)1467-2979</identifier>
<identifier type="PublisherID">FAF</identifier>
<part>
<date>2005</date>
<detail type="volume">
<caption>vol.</caption>
<number>6</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>1</number>
</detail>
<extent unit="pages">
<start>50</start>
<end>72</end>
<total>23</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">E458B6BF1575CAB30E605CE634F811A330ECDC8A</identifier>
<identifier type="DOI">10.1111/j.1467-2679.2005.00174.x</identifier>
<identifier type="ArticleID">FAF174</identifier>
<recordInfo>
<recordOrigin>Blackwell Science Ltd</recordOrigin>
<recordContentSource>WILEY</recordContentSource>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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