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Seasonal bottlenecks in diet shifts and growth of smelt in a large eutrophic lake

Identifieur interne : 000468 ( Istex/Corpus ); précédent : 000467; suivant : 000469

Seasonal bottlenecks in diet shifts and growth of smelt in a large eutrophic lake

Auteurs : M. Vinni ; J. Lappalainen ; T. Malinen ; H. Peltonen

Source :

RBID : ISTEX:F1F197546D96988DB2F620303B6611D45AAA2CCA

English descriptors

Abstract

Seasonal growth of smelt Osmerus eperlanus was studied in the Kiihkelyksenselkä basin in the eutrophic Lake Hiidenvesi, southern Finland. The growth of age 1+ and 2+ year smelts was very low probably due to the discontinuous supply of large invertebrates Chaoborus flavicans and Mysis relicta. Diet shift back to zooplankton in autumn, suggested the existence of a bottleneck in the growth of these age groups. Slow growth rate was further intensified by the onset of maturity at age 2 years, combined with the high diet and habitat overlaps between similar‐sized 1+ and 2+ year smelts. Older 3+ and 4+ year smelts shifted to piscivory, i.e. cannibalism, during the growing season, which was seen as rapid increases in their growth rates.

Url:
DOI: 10.1111/j.0022-1112.2004.00323.x

Links to Exploration step

ISTEX:F1F197546D96988DB2F620303B6611D45AAA2CCA

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<publisher>Blackwell Science Ltd</publisher>
<place>
<placeTerm type="text">Oxford, UK; Malden , USA</placeTerm>
</place>
<dateIssued encoding="w3cdtf">2004-02</dateIssued>
<edition>(Received 25 March 2003, Accepted 18 November 2003)</edition>
<copyrightDate encoding="w3cdtf">2004</copyrightDate>
</originInfo>
<language>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
</language>
<physicalDescription>
<internetMediaType>text/html</internetMediaType>
<extent unit="figures">41</extent>
<extent unit="tables">1</extent>
<extent unit="formulas">2</extent>
<extent unit="references">30</extent>
</physicalDescription>
<abstract lang="en">Seasonal growth of smelt Osmerus eperlanus was studied in the Kiihkelyksenselkä basin in the eutrophic Lake Hiidenvesi, southern Finland. The growth of age 1+ and 2+ year smelts was very low probably due to the discontinuous supply of large invertebrates Chaoborus flavicans and Mysis relicta. Diet shift back to zooplankton in autumn, suggested the existence of a bottleneck in the growth of these age groups. Slow growth rate was further intensified by the onset of maturity at age 2 years, combined with the high diet and habitat overlaps between similar‐sized 1+ and 2+ year smelts. Older 3+ and 4+ year smelts shifted to piscivory, i.e. cannibalism, during the growing season, which was seen as rapid increases in their growth rates.</abstract>
<subject lang="en">
<genre>Keywords</genre>
<topic>cannibalism</topic>
<topic>diet shift</topic>
<topic>echosounding</topic>
<topic>growth bottleneck</topic>
<topic>smelt</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Journal of Fish Biology</title>
</titleInfo>
<identifier type="ISSN">0022-1112</identifier>
<identifier type="eISSN">1095-8649</identifier>
<identifier type="DOI">10.1111/(ISSN)1095-8649</identifier>
<identifier type="PublisherID">JFB</identifier>
<part>
<date>2004</date>
<detail type="volume">
<caption>vol.</caption>
<number>64</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>2</number>
</detail>
<extent unit="pages">
<start>567</start>
<end>579</end>
<total>13</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">F1F197546D96988DB2F620303B6611D45AAA2CCA</identifier>
<identifier type="DOI">10.1111/j.0022-1112.2004.00323.x</identifier>
<identifier type="ArticleID">JFB323</identifier>
<recordInfo>
<recordOrigin>Blackwell Science Ltd</recordOrigin>
<recordContentSource>WILEY</recordContentSource>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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