摘要
采用耗氧强度测定法 ,对太平洋牡蛎三倍体和二倍体代谢进行比较研究。结果表明 ,在不同温度下 ,2n标准代谢 (StM)占常规代谢 (有饵料条件下 ,RfM)的比例平均为 85 7%( 82 6%— 91 % ) ,高于 3n的 78 4% ( 72 %— 84 3% ) ;2n因摄食所耗机械代谢变动于RfM的2 6%— 6 7% ,平均值为 4 3% ,低于 3n的 8% ( 4 9%— 1 3 6% ) ;同时 ,2n用于消化、吸收食物的代谢平均约占RfM的 9 98% ,低于 3n的均值 1 2 6%。经协方差分析检验 ,倍性对标准代谢、消化和吸收代谢及摄食代谢虽未表现出显著作用 ,但在不同生理状况下 ,2n耗氧率的均值都高于 3n。在 2 0℃下 ,对太平洋牡蛎 2n和 3n标准代谢和常规代谢 (无饵料条件下 ,RM)的昼夜周期性比较表明 ,3n的特殊动力代谢 (SDA)峰值略高于 2n,SDA持续时间和总耗能分别为 2n的 1 3倍和 0 80倍。实验还表明 ,2n和 3n在停食后 2 8h和 2 4h分别达到其排氨率的高峰 ,两者的排氨率差异虽不显著 ,但排氨率均值 3n高于 2n。
The specific dynamic action of triploid, Crassostrea gigas were compared with those of sibling diploids. In different temperature, the proportion of the standard metabolism ( S tM ) to the routing metabolism (in food, R f M ) of diploids was 85.7% on average (82.6%-91%), exceeding 78.4% (72%-84.3%) of triploids. The mechanical costs associated with feeding of diploids possessed about 4.3% to routing metabolism (in food), the range of variation of 2.6%-6.7%, which was lower than 8% of triploids (4.9%-13.6%); Meanwhile, the metabolic costs of digestion and absorption of diploids occupied about 9.98% in R f M , averagely, lower than 12.6% of triploids. By means of coveriates test, above mentioned three types of metabolism were not affected significantly by polyploid. However, there were more oxygen consumption of diploids than those of triploids in different physiological conditions, on average. In 20℃, it was found that, on comparison of periodicity of standard metabolism and routing metabolism (no food) of diploids with those of triploids, the maximum value of SDA of triploids was higher than those of diploids, and triploids take 130% more times of SDA and spent 80% less energy of SDA than diploids. No significant differences were found between diploids and triploids in the standard metabolism and routing metabolism, but both average values of diploids were higher than triploids. The peak of ammonia excretion were reached by diploids and triploids in 28h and 24h behind of no feeding, respectively. Specially, the average value of ammonia excretion of triploids was higher than diploids in the experiment periods.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2002年第6期663-672,共10页
Oceanologia Et Limnologia Sinica
基金
国家海洋"863"课题资助项目863 81 9 0 1 0 4号
