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采用室内流水模拟实验法测定了真鲷的生长和生态转换效率 ,及其温度、摄食水平、饵料生物种类和群居行为因素的影响。真鲷的特定生长率随温度或摄食水平升高而减速增长 ,其关系分别可用公式SGR =2 .0 1LnT - 4.69(R2 =0 .9881)或SGR =0 .97Ln(FL) - 0 .2 5 (R2 =0 .9984)定量描述 ;而生态转换效率则随温度或摄食水平增大而增至一峰值 ,然后随其进一步增加而降低 ,其关系分别可用二次曲线Eg =- 0 .17T2 + 7.19T - 5 4.0 6 (R2 =0 .9945 )或Eg =- 1.10FL2 + 10 .16FL + 5 .5 4(R2 =0 .9995 )定量描述 ,且依据上述公式可分别求得实验条件下的最佳生长温度为 2 0 .8℃ ,维持摄食量和最佳摄食量分别为真鲷体重的 1.2 9%和 4.60 %。真鲷的群居性和摄食小型鱼类饵料 ,有利于加速其生长速度 ,却对生态转换效率无显著影响。
The growth and ecological conversion efficiency of the red sea bream were determined by indoor flow simulation method and the effects of temperature, feeding level, species of bait organisms and social behavior were also studied. The specific growth rate of the red sea bream decreased with increasing temperature or food intake, and the relationship could be expressed as SGR = 2.01LnT - 4.69 (R2 = 0.9881) or SGR = 0.97Ln (FL) - 0.2 5 (R2 = 0.9984), while the ecological conversion efficiency increased with the increase of temperature or food intake to a peak value, and then decreased with further increase. The relationship was respectively expressed by quadratic curve Eg = -0.17T2 + 7.19T - 5 4.06 (R2 = 0.9945) or Eg = - 1.10FL2 + 10.16FL + 5.54 (R2 = 0.9995), and according to the above formula, the experimental conditions The optimum growth temperature was 20.8 ℃, and the maintenance of food intake and optimal food intake were 1.2 9% and 4.60% of the body weight of sea bream respectively. The seabream’s gregariousness and food intake of small fish help to accelerate its growth rate, but have no significant effect on ecological conversion efficiency.