摘要
于１９９６年１２月至１９９７年１月在实验室内研究了温度对墨西哥湾扇贝（Ａｒ－ｇｏｐｅｃｔｅｎｉｒｒａｄｉａｎｓｃｏｎｃｅｎｔｒｉｃｕｓ）的耗氧率和排泄（ＮＨ４－Ｎ）率的影响，实验在投饵后６ｈ，静水（盐度３２）条件下进行，溶氧量和氨氮量分别采用Ｗｉｎｋｌｅｒ滴定法和次溴酸盐氧化法测定。实验结果表明，在实验温度（１０～３１℃）条件下，不同规格（壳高１．６～４．８ｃｍ，软体部干重０．０３４２～０．６９０８ｇ）的墨西哥湾扇贝耗氧率的总平均值为２．３５ｍｇ／（ｇ·ｈ）．排泄率总平均值为３５０．８９μｇ／（ｇ·ｈ）．墨西哥湾扇见的耗氧量和排氧量都与扇贝体重呈明显的幂函数关系。在１０～２８℃范围内，不同规格的扇贝耗氧率都随温度的升高而增加；当水温继续升高到３１℃时，耗氧率反而下降。在实验温度（１０～３１℃）条件下，扇贝的排泄率随着温度的升高而增加，温度对墨西哥湾扇贝的耗氧率和排泄率的影响都可用指数方程表示。本实验证实，高温（３１℃）将进一步提高墨西哥湾扇贝蛋白质的代谢水平。耗氧量（Ｏ）和排氨量（Ｎ）与温度（ｔ）、扇贝软体部干重（Ｗ）二元线性回归方程分别为：Ｏ＝－５８７．８０４＋３６．７８７ｔ＋１６９７．８６４Ｗ；Ｎ＝－９?
Effects of temperature on oxygen consumption rate and ammonia-N excretion rate of the South- ern Bay scallop Argopecten irradians cencontricus (1.6-4.8 cm in shell height , 0. 034 2 - 0. 690 8 g in dry weight of soft tissue ) were studied in la boratory from Dec. 30, 1996 to Jan. 28, 1997. Under the controlled conditions of ambient temperature 10- 31℃ and salinity 32, the concentration of dissolved oxygen and am- monia-N were determined by the Winkler method and the hypobromite method respectively. Results show that the range of oxygen consumption rate was from 1.06 to 5.48 mg/ (g .h) , mean of 2. 35 mg/(g. h).The relationship between oxygen consumption quantity (mg/h ) and dry weight of soft-tissue (g) can be represented by the allometric equation O=aWb, b value was 0. 748 2-0. 9373. The oxygen consumption rate increased with temperature. increasing at 10- 28℃ , but reduced at 31℃. Effect o f temperature on oxygen consumption rate (10-28℃)can be described by Os=r1er2t, t, the correlation coefficient was 0.194 0-0. 944 0. The range of ammonia-N excretion rate was from 111. 28 to 791. 91 ug/ (g. h), mean of 350. 89 ug/ (g. h ). The relation- ship between ammonia-N excretion quantity (ug/h) and dry weight of soft tissue can also be represented as the allometric equation: N=cWd, and d value was 0.765 4- 0. 852 8. The ammonia-N excretion rate increased at the temperature from 10℃ 31℃, and the impact of temperature on ammonia-N excretion rate can be rep- resented by Na=q1eq2t,r was 0. 877 2-0. 967 2. It is indicated that high temperature (31℃) can improve the level of protein metabolism in this experiment. The linear regression relationships among oxygen consumption quantity and temperature and dry weight of soft tissue can be described by O=-252. 780 + 25. 624t + 1509. 917W, and ammonia-N excretion quantity by N= - 38. 758+2. 794t+175. 228 W. the multiple r were 0. 880 6 and 0. 803 5, respectively.
出处
《海洋学报》
CAS
CSCD
北大核心
1998年第4期91-96,共6页
基金
国家重点科技项目
关键词
温度
墨西哥湾
扇贝
耗氧率
排泄率
Southern Bay scallop, temperature, oxygen consumption rate, ammonia-N excretion rate
