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Study on oxygen consumption of embryo and early larva Trachinotus ovatus
WANG Gang1,2, LI Jia-er1, OU You-jun1, WANG Jing-xiang1,2
1. South China Sea Fisheries Research lnstitute, Chinese Academy of Fishery Sciences Guangzhou 510300; 2. College of Fisheries and Life Science, Shanghai Ocean University Shanghai 201306, China
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Abstract  

Using SKW-3 instrument,we determined the oxygen consumption in main development stages of Trachinotus ovatus embryos and early larvae,and investigated the influences of temperature,salinity,pH on oxygen consumption of embryos,as well as effects of copper and cadmium concentrations on oxygen consumption of early larvae.The results showed that under the conditions of(25±0.5)℃, the oxygen consumption of embryos and early larvae of T.ovatus increased gradually with prolonged development,and became the maximum when embryos were in pre-stage of hatching.The stages of gastrula and hatching were sensitive especially to dissolved oxygen content in water.Embryonic oxygen consumption increased gradually with the increase of temperature,salinity and pH,reaching the maximum value at water temperature of 25℃,salinity 35 and pH 8,and then declined gradually.The oxygen consumption showed a trend of hyperbola with the rise of copper concentration.The oxygen consumption of embryos became the highest when copper concentration was 0.01 mg·L-1 in water.Embryonic oxygen consumption decreased with the rise of cadmium concentration.

Key wordsTrachinotus ovatus      embryo      early larva      oxygen consumption     
Received: 25 December 2010     
:  Q473  
  Q959.483  
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WANG Gang
LI Jia-er
OU You-jun
WANG Jing-xiang
Cite this article:   
WANG Gang,LI Jia-er,OU You-jun, et al. Study on oxygen consumption of embryo and early larva Trachinotus ovatus[J]. , 2010, 29(6): 518-523.
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http://www.ecolsci.com/EN/     OR     http://www.ecolsci.com/EN/Y2010/V29/I6/518
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