盐度和营养对凡纳滨对虾生长、耗氧率及排氨率的影响

doi:10.11978/j.issn.1009-5470.2010.05.111

Abstract

Abstract:

An experiment was conducted to determine the effects of salinity and dietary protein levels on growth, respiration and excretion of Litopenaeus vannamei. The composition of body muscle was analyzed. The results showed that the growth rate was increased with the increase of dietary protein level, but the survival rate was not significantly affected (P>0.05). The survival rate was not significantly increased with the increase of salinity in the different dietary protein levels (P>0.05). The growth rate was increased with the increase of salinity in a low salinity levels, the highest growth rate was obtained at 18, then it was decreased with further increase of salinity. The analysis of body composition showed that the crude protein, crude fat and ash content significantly increased with the increase of salinity (P<0.05), but moisture and nitrogen-free extract content decreased significantly (P<0.05). Crude protein and ash content significantly increased with the increase of dietary protein level (P<0.05), but moisture and nitrogen-free extract content decreased significantly (P<0.05), crude fat was not significantly affected (P>0.05).The oxygen consumption rate and the ammonia excretion rate were affected significantly by the different salinity and dietary protein levels (P<0.05). The oxygen consumption rate was significantly decreased with the increase of salinity and dietary protein level (P<0.05), appearance time of the high peak was 2−3 h after ingestion. The ammonia excretion rate increased with the increase of dietary protein level, but decreased with the increase of salinity, appearance time of the high peak was 2 h after ingestion. The oxygen-nitrogen ratio was affected significantly by the different salinity and the dietary pro-tein levels (P<0.05).

Key words: salinity, nutrition, growth, oxygen consumption rate, ammonia excretion rate, Litopenaeus vannamei

SHEN Yu-chun,CHEN Zuo-zhou,WU Zao-he,HUANG Xiang-hu. Effects of salinity and nutrition on growth, respiration and excretion of Litopenaeus vannamei[J].Journal of Tropical Oceanography, 2010, 29(5): 111-118.

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Effects of salinity and nutrition on growth, respiration and excretion of Litopenaeus vannamei

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