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Diel variations in Centropages tenuiremis (Copepoda) feeding, spawning and its relationship with temperature

Published online by Cambridge University Press:  30 August 2012

Lisheng Wu*
Affiliation:
College of Ocean and Earth Sciences, State Key Laboratory of Marine Environmental Science, Xiamen University, 361005, Xiamen, Fujian, People'sRepublic of China
Qiujing Gao
Affiliation:
College of Ocean and Earth Sciences, State Key Laboratory of Marine Environmental Science, Xiamen University, 361005, Xiamen, Fujian, People'sRepublic of China
Guizhong Wang
Affiliation:
College of Ocean and Earth Sciences, State Key Laboratory of Marine Environmental Science, Xiamen University, 361005, Xiamen, Fujian, People'sRepublic of China
Yusha Liu
Affiliation:
College of Ocean and Earth Sciences, State Key Laboratory of Marine Environmental Science, Xiamen University, 361005, Xiamen, Fujian, People'sRepublic of China
*
Correspondence should be addressed to: L. Wu, College of Ocean and Earth Sciences, State Key Laboratory of Marine Environmental Science, Xiamen University, 361005, Xiamen, Fujian, People's Republic of China email: [email protected]

Abstract

Diel rhythms in feeding and spawning were investigated in Centropages tenuiremis from Xiamen Bay in March to May, 2006. Circular statistics were used to determine the peak time of spawning. The results showed that the feeding activities of females were stably higher at night-time, and there was a remarkable earlier shift in spawning peak time with warmer seawater. Thus, the lag times between peak times of gut pigment content and spawning were shortened with the increase of temperature. It suggested that there was a direct effect of feeding rhythms on egg production variations in copepods, and the seawater temperature would work on the converting time and then influence the spawning peak time. So the effect of temperature cannot be ignored in the investigation of the effects of feeding on egg production.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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