自然死亡系数

不同误差结构对运用股分析（CA）模型求算鱼类自然死亡系数影响的初步研究

An elementary study of impacts of error structure on the estimation of fish natural mortality coefficient using cohort analysis ( CA ) model

总死亡系数为2.05，自然死亡系数为0.58，捕捞死亡系数为1.47，临界年龄为2.18龄。

Total death coefficient , natural death coefficient and the coefficient of fishing death are 2.05 , 0.58 and 1.47 , respectively , and critical age is 2.18 years .

选用渔业资源评估模型，估算未建立生长方程的增殖放流种类的生长参数及其自然死亡系数，以及增殖放流种类的合理放流数量。

The growth parameters and natural mortality coefficients of the enhancement species that hadn ′ t been built the growth equations were estimated and the suitable enhancement amounts of all enhancement species were estimated by choosing the suitable model of fishery stock assessment .