Skipped spawning in female iteroparous fishes
Identifieur interne : 000914 ( Main/Exploration ); précédent : 000913; suivant : 000915Skipped spawning in female iteroparous fishes
Auteurs : Rick M. Rideout [Canada] ; George A. Rose [Canada] ; Margaret P M. Burton [Canada]Source :
- Fish and Fisheries [ 1467-2960 ] ; 2005-03.
English descriptors
- KwdEn :
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
Affiliations:
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Rideout</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Fisheries Conservation Group, Fisheries and Marine Institute, Memorial University of Newfoundland, St John's, NL</wicri:regionArea><wicri:noRegion>NL</wicri:noRegion></affiliation></author><author><name sortKey="Rose, George A" sort="Rose, George A" uniqKey="Rose G" first="George A" last="Rose">George A. Rose</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Fisheries Conservation Group, Fisheries and Marine Institute, Memorial University of Newfoundland, St John's, NL</wicri:regionArea><wicri:noRegion>NL</wicri:noRegion></affiliation></author><author><name sortKey="Burton, Margaret P M" sort="Burton, Margaret P M" uniqKey="Burton M" first="Margaret P M" last="Burton">Margaret P M. Burton</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Biology, Memorial University of Newfoundland, St John's, NL</wicri:regionArea><wicri:noRegion>NL</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Fish and Fisheries</title><idno type="ISSN">1467-2960</idno><idno type="eISSN">1467-2979</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2005-03">2005-03</date><biblScope unit="volume">6</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="50">50</biblScope><biblScope unit="page" to="72">72</biblScope></imprint><idno type="ISSN">1467-2960</idno></series><idno type="istex">E458B6BF1575CAB30E605CE634F811A330ECDC8A</idno><idno type="DOI">10.1111/j.1467-2679.2005.00174.x</idno><idno type="ArticleID">FAF174</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1467-2960</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>non‐reproductive</term><term>recruitment</term><term>reproductive potential</term><term>spawning omission</term><term>spawning potential</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml: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.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Rideout, Rick M" sort="Rideout, Rick M" uniqKey="Rideout R" first="Rick M" last="Rideout">Rick M. Rideout</name></noRegion><name sortKey="Burton, Margaret P M" sort="Burton, Margaret P M" uniqKey="Burton M" first="Margaret P M" last="Burton">Margaret P M. Burton</name><name sortKey="Rose, George A" sort="Rose, George A" uniqKey="Rose G" first="George A" last="Rose">George A. Rose</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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