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JPR Advance Access originally published online on November 20, 2008
Journal of Plankton Research 2009 31(2):223-231; doi:10.1093/plankt/fbn113
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© The Author 2008. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

The differences in metabolic activity of subitaneous and diapause eggs in Centropages tenuiremis

Li-Sheng Wu, Gui-Zhong Wang* and Shao-Jing Li

Oceanographic Department, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, People's Republic of China

* CORRESPONDING AUTHOR: gzwang{at}xmu.edu.cn

Received on September 5, 2008; accepted on November 2, 2008


  Abstract

The respiration and the isoenzymes of subitaneous and diapause eggs of Centropages tenuiremis in Xiamen waters of China were investigated. The results demonstrated that the average oxygen consumption of subitaneous eggs was lower than that of diapause eggs during the pre-diapause stage. The character of respiration in diapause eggs was as follows: the oxygen consumption quickly rose after spawning, and reached a maximal value, then gradually declined to a lower value that was maintained at a lower value (~20% of the maximal value), the low value of oxygen consumption in diapause eggs was lower than that in subitaneous eggs at the same temperature (~70%). The experimental results also indicated that among subitaneous, diapause and pre-diapause eggs of Centropages tenuiremis, the pre-diapause eggs were the most sensitive to temperature, the diapause eggs were the most insensitive; the sensitivity of subitaneous eggs to temperature was intermediate. The results also showed that there are obvious differences of isozyme patterns in malate dehydrogenase (MDH), sorbitol dehydrogenase (SDH), superoxide dismutase (SOD) and esterase (EST) between subitaneous eggs and pre-diapause eggs, and the characteristic enzyme bands for pre-diapause eggs were shown to be as follows: MDH61, MDH81, SDH41, SDH60, SOD97, EST48, EST59 and EST61; for subitaneous eggs: MDH59, SDH70 and EST93.

Corresponding editor: Roger Harris


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