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JOURNAL OF PLANKTON RESEARCH | VOLUME 19 | NUMBER 1 | PAGES 1-14 | 1997
© Oxford University Press

research-article

Food availability as a potential source of bias in the egg production method for copepods

Saiz Enric, Albert Calbet, Isabel Trepat, Xabier Irigoien and Miquel Alcaraz

Institut de Ciències del Mar CSIC, Passeig Joan de Borbé s/n, E-08039 Barcelona, Catalonia, Spain

Received on January 31, 1996; accepted on April 4, 1996 The measurement of copepod adult female fecundity as an estimate of adult growth (production) rates has been an approach widely used in both laboratory and field studies. Here we demonstrate that the basic assumption of this approach, i.e. that estimated egg production during the incubation reflects the ‘in situ’ conditions, is not always legitimate and that it is temperature dependent. The enhancement of metabolic rates induced by high temperatures induces a more accented bias of the method. We also provide guidelines on how to conduct the incubations in order to obtain more reliable estimates.


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This article has been cited by other articles:


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C. Halsband-Lenk, S. Nival, F. Carlotti, and H.-J. Hirche
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Naupliar growth versus egg production in the calanoid copepod Centropages typicus
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