温度和体重对中国对虾碳收支的影响

Effect of temperature and body weight on carbon budget of Penaeus chinensis.

于 1996年 5～ 9月 ,测定了 3种规格 ( 0 .2 71± 0 .0 41g、3 .5 0 9± 0 .3 0 1g、11.0 62± 1.0 2 7g)池塘养殖中国对虾 (Penaeuschinensis)在 2 0℃、2 5℃和 3 0℃下 ,摄食日本刺沙蚕 (Neanthesjaponica)的C收支 .结果表明 ,温度和体重对摄食C有显著影响 ,随温度升高和体重的下降 ,C的摄食量显著增大 ,在 2 0℃、2 5℃和 3 0℃下的平均C摄食量分别为 12 .41、19.12和 2 6.0 8mg·g-1·d-1,在 3个规格下的平均C摄食量分别为 3 6.0 6、12 .17和 9.3 8mg·g-1·d-1.不同规格中国对虾对摄食C的分配比例无显著影响 ,温度是影响中国对虾摄食C分配的主要因素 .在 3个温度下摄食沙蚕的生长C、排粪C、蜕壳C和代谢C占摄食C的平均分配比例分别为 3 1.2 3 %、4.3 8%、7.94%、5 6.45 % ;2 6.83 %、2 .92 %、6.69%、65 .79% ;16.86%、2 .3 8%、5 .99%和 74.76% .

The carbon budget of Penaeus chinensis feeding on polychaet worm( Neanthes japonica) was determined at various levels of temperature (20℃,25℃,30℃) and body weights(0.271±0.041g,3.509±0.301g,11.062±1.027g) from May to September,1996.The results show that the carbon consumption was significantly affected by water temperature and body weight,which significantly increased with increasing temperature and decreasing body weight.The average carbon consumptions at 20℃,25℃ and 30℃ were 12.41,19.12 and 26.08mg·g -1 ·d -1 ,and those for 3 body weights were 36.06,12.17 and 9.38mg·g -1 ·d -1 ,respectively.The intake carbon allocation was not significantly affected by body weight,but significantly affected by water temperature.The proportions of carbon allocated to growth,fecal,exuviation and metabolism at three different temperatures were 31.23%,4.28%,7.94%,56.45%;26.83%, 2.92 %, 6.69 %,65.79%;16.86%,2.38%,5.99%,74.76%, respectively.