Seasonal bottlenecks in diet shifts and growth of smelt in a large eutrophic lake
Identifieur interne : 000468 ( Istex/Corpus ); précédent : 000467; suivant : 000469Seasonal bottlenecks in diet shifts and growth of smelt in a large eutrophic lake
Auteurs : M. Vinni ; J. Lappalainen ; T. Malinen ; H. PeltonenSource :
- Journal of Fish Biology [ 0022-1112 ] ; 2004-02.
English descriptors
- KwdEn :
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.
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DOI: 10.1111/j.0022-1112.2004.00323.x
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<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>
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<identifier type="ISSN">0022-1112</identifier>
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<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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