2015年西南大西洋公海阿根廷滑柔鱼生物学初步分析

Fishery Biological Properties of Argentine Shortfin Squid in the High Sea of Southwest Atlantic Ocean in 2015

本文以2015年4月至2015年6月西南大西洋公海鱿钓船(宁泰58号)随机选取的431尾阿根廷滑柔鱼为样本,分析其生物学情况。主要结果如下:个体1腕、2腕、3腕、右4腕和左4腕的平均长度差异较显著,平均长度3腕>2腕>4腕>1腕,右4腕和左4腕的平均长度稍有差异;平均胴长为258.4 mm,雌性个体胴长明显大于雄性个体胴长;平均体重为413.6 g,雌性个体体重明显大于雄性个体体重;雌性与雄性的性比约为1.596:1;性腺成熟度以Ⅱ、Ⅲ期为主,其中以Ⅱ期最多(34.34%);摄食等级以1、2、3级为主,其中2级最多,摄食等级排序为2级>3级>1级>4级>0级。

The author analyzed fishery biological properties of Argentine shortfin squid based on the 431 samples from the vessel NING TAI 58 in the high sea of Southwest Atlantic Ocean during April to June 2015. The results showed that average length of wrists indicates significance, andaverage length was in decrease turn： third wrist, second wrist, fourth wrist, first wrist, andaverage length between fourth wrist on the rightand fourth wrist on theleftindicates slightly. The average mantle length was 258.4 mm, and the size of female individuals was significantly bigger than that of males. The average weight was 413.6 g, and the size of female individuals was significantly bigger than that of males. The sex ratio of female to male was 1.596：1. The sexual maturity was mainly in phase Ⅱ and Ⅲ , and the proportion of phase Ⅱ wasthe largest （34.34%）. The cibation grade was mainly in phase 1, 2 and 3, and the proportion of phase 2 was the largest, and the proportion of the ciba- tion grade from high to low was phase 2, phase 1, phase 4, phase 0.