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Length, weight and condition factor of Acartia clausi (Copepoda) in the eastern Mediterranean

Published online by Cambridge University Press:  11 May 2009

Epaminondas D. Christou  and
George C. Verriopoulos
Epaminondas D. Christou
Affiliation:
National Centre for Marine Research, Agios Kosmas, Hellinikon, GR-166 04, Athens, Greece
George C. Verriopoulos
Affiliation:
Zoological Laboratory, University of Athens, Panepistimiopolis, GR-157 84, Athens, Greece
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Extract

Cephalothorax length and dry weight of copepodite stages and adults of the planktonic copepod Acartia clausi Giesbrecht in the Saronikos Gulf, Greece, were measured. Length-weight relationships and condition factor were also determined. The results were based on 17 zooplankton samples collected between November 1989 and June 1990, a period in which the abundance of A. clausi is significant. There was an inverse relationship between temperature and length, a pattern shown by many copepods. Temperature had the most significant effect on length, which was also affected by chlorophyll level. This strong temporal variation in length might possibly be considered as an adaptation of A. clausi to a continuously fluctuating environment. Length-weight regressions displayed high coefficients of determination (r2=0.98). Food, expressed as chlorophyll, affected the size and condition factor, and could act as a limiting factor on length and weight of A. clausi in the study area.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 73 , Issue 2 , May 1993 , pp. 343 - 353
Copyright
Copyright © Marine Biological Association of the United Kingdom 1993

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