Effects of egg size, parental origin and feeding conditions on growth of larval and juvenile cod Gadus morhua
Identifieur interne : 001152 ( Istex/Curation ); précédent : 001151; suivant : 001153Effects of egg size, parental origin and feeding conditions on growth of larval and juvenile cod Gadus morhua
Auteurs : H. Paulsen [Danemark] ; O. S. Kjesbu ; V. Buehler ; R. A. J. Case [Royaume-Uni] ; C. Clemmesen ; G. Carvalho [Royaume-Uni] ; L. Hauser [Royaume-Uni] ; W F. Hutchinson [Royaume-Uni] ; E. Moksness [Norvège] ; H. Otter ; A. Thorsen ; T. Sv SandSource :
- Journal of Fish Biology [ 0022-1112 ] ; 2009-08.
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Abstract
An experimental study was performed to disentangle parental and environmental effects on the growth of Atlantic cod Gadus morhua larvae and juveniles. Eggs were collected during the spawning season from spawning pairs (families) kept separately in specially designed spawning compartments. Newly hatched larvae were released simultaneously into two mesocosms of 2500 and 4400 m3. Larval growth was monitored by sampling over a 10 week period, after which juveniles were transferred to on‐growing tanks, where they were tagged and kept for up to 2 years. Maternal origin was determined by individual microsatellite genotyping of the larvae (n = 3949, 24 families) and juveniles (n = 600). The results showed significant positive correlations between egg size and larval size during the whole mesocosm period. Correlations, however, weakened with time and were no longer significant at the first tank‐rearing sampling at an age of 9 months. Significant family‐specific differences in growth were observed. The coefficient of variation (c.v.) was calculated in order to examine variation in standard length of larvae during the mesocosm period. Inter‐family c.v. was on average 69% of intra‐family c.v. Differences in zooplankton densities between the two mesocosms were reflected in larval growth, condition factor and c.v. Low food abundance appeared to reduce c.v. and favour growth of larvae that showed relatively slow growth at high food abundance. It is suggested that genetically determined variation in growth potential is maintained by environmental variability.
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DOI: 10.1111/j.1095-8649.2009.02301.x
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O. S. Kjesbu<affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation><affiliation><mods:affiliation>Leibniz Institute for Marine Sciences at Kiel University (IFM‐GEOMAR), Düsternbrooker Weg 20, D‐24105 Kiel, Germany,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation><affiliation><mods:affiliation>Leibniz Institute for Marine Sciences at Kiel University (IFM‐GEOMAR), Düsternbrooker Weg 20, D‐24105 Kiel, Germany,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation>Le document en format XML
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Paulsen</name><affiliation><mods:affiliation>National Institute of Aquatic Resources, Technical University of Denmark, P.O. Box 101, DK‐9850 Hirtshals, Denmark,</mods:affiliation></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: hep@aqua.dtu.dk</mods:affiliation><country wicri:rule="url">Danemark</country></affiliation></author><author><name sortKey="Kjesbu, O S" sort="Kjesbu, O S" uniqKey="Kjesbu O" first="O. S." last="Kjesbu">O. S. Kjesbu</name><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Buehler, V" sort="Buehler, V" uniqKey="Buehler V" first="V." last="Buehler">V. Buehler</name><affiliation><mods:affiliation>Leibniz Institute for Marine Sciences at Kiel University (IFM‐GEOMAR), Düsternbrooker Weg 20, D‐24105 Kiel, Germany,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Case, R A J" sort="Case, R A J" uniqKey="Case R" first="R. A. J." last="Case">R. A. J. Case</name><affiliation wicri:level="1"><mods:affiliation>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull, U.K. and</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull</wicri:regionArea></affiliation></author><author><name sortKey="Clemmesen, C" sort="Clemmesen, C" uniqKey="Clemmesen C" first="C." last="Clemmesen">C. Clemmesen</name><affiliation><mods:affiliation>Leibniz Institute for Marine Sciences at Kiel University (IFM‐GEOMAR), Düsternbrooker Weg 20, D‐24105 Kiel, Germany,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Carvalho, G" sort="Carvalho, G" uniqKey="Carvalho G" first="G." last="Carvalho">G. Carvalho</name><affiliation wicri:level="1"><mods:affiliation>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull, U.K. and</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull</wicri:regionArea></affiliation></author><author><name sortKey="Hauser, L" sort="Hauser, L" uniqKey="Hauser L" first="L." last="Hauser">L. Hauser</name><affiliation wicri:level="1"><mods:affiliation>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull, U.K. and</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull</wicri:regionArea></affiliation></author><author><name sortKey="Hutchinson, W F" sort="Hutchinson, W F" uniqKey="Hutchinson W" first="W F." last="Hutchinson">W F. Hutchinson</name><affiliation wicri:level="1"><mods:affiliation>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull, U.K. and</mods:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>University of Hull, Molecular Ecology & Fisheries Genetics Group, Department of Biological Sciences, Cottingham Road, HU6 7RX Hull</wicri:regionArea></affiliation></author><author><name sortKey="Moksness, E" sort="Moksness, E" uniqKey="Moksness E" first="E." last="Moksness">E. Moksness</name><affiliation wicri:level="1"><mods:affiliation>Institute of Marine Research, Flødevigen Research Station, NO‐4817 His, Norway</mods:affiliation><country xml:lang="fr">Norvège</country><wicri:regionArea>Institute of Marine Research, Flødevigen Research Station, NO‐4817 His</wicri:regionArea></affiliation></author><author><name sortKey="Otter, H" sort="Otter, H" uniqKey="Otter H" first="H." last="Otter">H. Otter</name><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Thorsen, A" sort="Thorsen, A" uniqKey="Thorsen A" first="A." last="Thorsen">A. Thorsen</name><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author><author><name sortKey="Sv Sand, T" sort="Sv Sand, T" uniqKey="Sv Sand T" first="T." last="Sv Sand">T. Sv Sand</name><affiliation><mods:affiliation>Institute of Marine Research, P.O. Box 1870 Nordnes, NO‐5817 Bergen, Norway,</mods:affiliation><wicri:noCountry code="subField"></wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Fish Biology</title><idno type="ISSN">0022-1112</idno><idno type="eISSN">1095-8649</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2009-08">2009-08</date><biblScope unit="volume">75</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="516">516</biblScope><biblScope unit="page" to="537">537</biblScope></imprint><idno type="ISSN">0022-1112</idno></series><idno type="istex">57F5757977BA495C38AF83AE5F7D213394720776</idno><idno type="DOI">10.1111/j.1095-8649.2009.02301.x</idno><idno type="ArticleID">JFB2301</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-1112</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>environmental effects</term><term>genotyping</term><term>growth variability</term><term>maternal</term><term>mesocosm</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">An experimental study was performed to disentangle parental and environmental effects on the growth of Atlantic cod Gadus morhua larvae and juveniles. Eggs were collected during the spawning season from spawning pairs (families) kept separately in specially designed spawning compartments. Newly hatched larvae were released simultaneously into two mesocosms of 2500 and 4400 m3. Larval growth was monitored by sampling over a 10 week period, after which juveniles were transferred to on‐growing tanks, where they were tagged and kept for up to 2 years. Maternal origin was determined by individual microsatellite genotyping of the larvae (n = 3949, 24 families) and juveniles (n = 600). The results showed significant positive correlations between egg size and larval size during the whole mesocosm period. Correlations, however, weakened with time and were no longer significant at the first tank‐rearing sampling at an age of 9 months. Significant family‐specific differences in growth were observed. The coefficient of variation (c.v.) was calculated in order to examine variation in standard length of larvae during the mesocosm period. Inter‐family c.v. was on average 69% of intra‐family c.v. Differences in zooplankton densities between the two mesocosms were reflected in larval growth, condition factor and c.v. Low food abundance appeared to reduce c.v. and favour growth of larvae that showed relatively slow growth at high food abundance. It is suggested that genetically determined variation in growth potential is maintained by environmental variability.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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