摘要
对一龄太平洋牡蛎三倍体和二倍体能量收支比较研究的结果表明，在５～３０℃下，二倍体摄入能量的３２％为粪能、３．６５％为排泄能、４１．６６％消耗于呼吸、２２．８１％用于动物生长；三倍体摄入能量的２３％为粪能、７．５４％为排泄能、４０．６５％的能量用于呼吸、２８．７８％为生长。经协方差检验，倍性和温度对牡蛎的生长能、同化能和排泄能影响显著，对代谢能和摄食能作用不明显。实验还表明，二倍体Ｋ２值平均３３．９％；三倍体Ｋ２值平均３７．４％。毛生长效率二倍体平均为２２．８％；三倍体平均２８．８％。经协方差检验，倍性和温度对Ｋ１的影响都达到极显著水平。三倍体牡蛎性腺指数平均为５％；二倍体平均为２５．６％，经方差检验，倍性对动物性腺指数的影响达到显著水平。
The energy budgets, assimilation and conversion efficiency of l-year-old triploid, Crassostrea gigas were compared with those of sibling diploids. At 5 - 30℃, 32% of the energy ingested by diploid oysters was passed, 3.65% was ammonia excretion,41.66% was respired and lost at heat, and 22.81% was used for growth. Under same condition, among the energy fed by triploid, the feces accountal for23%,the metabolism about 40.65%, ammonia excretion about 7.54%,and about 28.78% was used for growth. In general, triploids spent26% more energy for growth than diploids did, 13% more for assimilation, 106% more for ammonia excretion and consumed 97% less energy for respiration. By means of coveriates test, the growth,assimilation, and ammonia excretion energy of oysters were affected significantly by polyploid and temperature. No significant difference was found between diploids and triploids in Oxygen consumption. The net growth efficiencies of diploid and triploid groups were 33 .9% and 37.4% respectively, and the gross growth efficiencies of them were 22.8% and 28.8%. Influence of polyploid and temperature on K1 of oysters was significant, but the variation of K2 may be attributable to ambient temperature. The ratio of gonad dry weight and dry tissue of triploid group was 5% on average, and diploid individuals about 25.6%.
出处
《水产学报》
CAS
CSCD
北大核心
2000年第6期504-509,共6页
Journal of Fisheries of China
基金
国家科委海洋863计划资助!(863-819-01-04)
关键词
太平洋牡蛎
能量收支
二倍体
三倍体
Crassostrea gigas triploidy
energy budget
energy conversion efficiency
temperature
