利用分位数法分析西北太平洋柔鱼生长

Growth is one of main content in fisheries biology. According to the sampling squid, Ommastrephes bartramii, from July to October in 2007 in the northwest Pacific Ocean, use the quantile method is used to study the growth of squid. The results suggested that when Quantile τ = (0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95), the quantile regression coefficients with time for the female is equal to 0.0103,0.0126,0.0297,0.0566,0.1087,0.1117 and 0.121, for the male is 0.0180, 0.0223, 0.0334, 0.0630, 0.080, 0.0790 and 0.0865. From the distribution of mantle length with time, the lower quantile regression coefficients is greatly affected by the size of recuitment, and the growth rate is less. The 95% percentile of upper quantile regression coefficient is more appropriate compared with the lower quantile, 1.21mm/d for females and 0.8mm/d for the male, which may be used as the growth rates of squid. It is concluded that the quantile method can be feasibly used to estimate the growth rate of Ommastrephes bartramii in the northwest Pacific Ocean.