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URN: urn:nbn:de:kobv:517-opus-17627
URL: http://opus.kobv.de/ubp/volltexte/2008/1762/


Wacker, Alexander ; Elert, Eric von

Strong influences of larval diet history on subsequent post-settlement growth in the freshwater mollusc Dreissena polymorpha

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Kurzfassung in Englisch

Significant seasonal variation in size at settlement has been observed in newly settled larvae of Dreissena polymorpha in Lake Constance. Diet quality, which varies temporally and spatially in freshwater habitats, has been suggested as a significant factor influencing life history and development of freshwater
invertebrates. Accordingly, experiments were conducted with field-collected larvae to test the hypothesis that diet quality can determine planktonic larval growth rates, size at settlement and subsequent post-metamorphic growth
rates. Larvae were fed one of two diets or starved. One diet was composed of cyanobacterial cells which are deficient in polyunsaturated fatty acids (PUFAs), and the other was a mixed diet rich in PUFAs. Freshly metamorphosed animals from the starvation treatment had a carbon content per individual 70% lower than that of larvae fed the mixed diet. This apparent exhaustion of larval internal reserves resulted in a 50% reduction of the postmetamorphic growth rates. Growth was also reduced in animals previously fed the cyanobacterial diet.
Hence, low food quantity or low food quality during the larval stage of D. polymorpha lead to irreversible effects for postmetamorphic animals, and is related to inferior competitive abilities.

Freie Schlagwörter (Englisch): Dreissena polymorpha , food quality , fatty acid , life history , metamorphosis , PUFA
Institut 1: Institut für Biochemie und Biologie
Institut 2: Extern
DDC-Sachgruppe: Biowissenschaften, Biologie
Dokumentart: c Postprint
Schriftenreihe: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372
Bandnummer: paper 064
Quelle: Proceedings of the Royal Society London B. - 269 (2002), 1505, pp. 2113-2119. - ISSN 0962-8452 (Print) 1471-2954 (Online)
Sprache: Englisch
Erstellungsjahr: 2002
Publikationsdatum: 25.04.2008
Bemerkung:
first published in:
Proceedings of the Royal Society London B. - 269 (2002), 1505, pp. 2113-2119
ISSN: 0962-8452 (Print) 1471-2954 (Online)
doi:10.1098/rspb.2002.2139
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