2011年西南大西洋拖网渔获物阿根廷滑柔鱼生物学分析

根据2011年1月～4月双拖网船在西南大两洋作业时采集的901尾阿根廷滑柔鱼（lllex argentinus）样本，对其渔获群体组成、摄食等级、胴长-体质量关系以及性腺发育等进行了分析。结果表明，样本个体大小随采样时间的推移有明显增大趋势；小胴长组阿根廷滑柔鱼的摄食能力较大胴长组弱，摄食等级的高低与其繁殖高峰期有关。阿根廷滑柔鱼雌、雄初次性成熟胴长分别为191．6mm和182．6mm，性腺成熟度为Ⅴ期个体的平均胴长小于处于Ⅲ、Ⅳ期个体的平均胴长。综合分析推测，该研究采集的901尾样本为南部巴塔哥尼亚群体和夏季产卵群体的混合样本，在拖网作业后期，渔场补充了部分大个体的夏季群体。...

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Bibliographic Details
Published in南方水产科学 Vol. 8; no. 3; pp. 39 - 47
Main Author 刘岩 张秀梅 周游 孙明
Format Journal Article
LanguageChinese
Published 中国海洋大学水产学院,山东青岛,266003%山东省海洋与渔业厅,山东济南,250002 2012
Subjects
拖网
生物学特性
西南大西洋
阿根廷滑柔鱼
生物学特性
西南大西洋
阿根廷滑柔鱼
拖网
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ISSN2095-0780
DOI10.3969/j.issn.2095-0780.2012.03.006

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Summary:根据2011年1月～4月双拖网船在西南大两洋作业时采集的901尾阿根廷滑柔鱼（lllex argentinus）样本，对其渔获群体组成、摄食等级、胴长-体质量关系以及性腺发育等进行了分析。结果表明，样本个体大小随采样时间的推移有明显增大趋势；小胴长组阿根廷滑柔鱼的摄食能力较大胴长组弱，摄食等级的高低与其繁殖高峰期有关。阿根廷滑柔鱼雌、雄初次性成熟胴长分别为191．6mm和182．6mm，性腺成熟度为Ⅴ期个体的平均胴长小于处于Ⅲ、Ⅳ期个体的平均胴长。综合分析推测，该研究采集的901尾样本为南部巴塔哥尼亚群体和夏季产卵群体的混合样本，在拖网作业后期，渔场补充了部分大个体的夏季群体。
Bibliography:lllex argentinus; trawl; southwest Atlantic; biological characteristics
LIU Yan, ZHANG Xiumei , ZHOU You , SUN Ming（1. Fisheries College, Ocean University of China, Qingdao 266003, China; 2. Ocean and Fisheries Bureau of Shandong Province, Jinan 250002, China）
44-1683/S
In base of 901 individuals of Argentine shortfin squid （lllex argentinus） collected in continental shelf and slope of southwest Atlantic by twin trawls during January to April in 2011, we determined their population composition, feeding intensity, lengthweight relationship and gonadal development. The results show that the mantle length of the samples increases along with the sampling time. Feeding ability of small-mantle-length groups is weaker than that of big-mantle-length ones, which is related with fecundity peak period. The mantle length of first maturity for females and males is 191.6 mm and 182.6 mm, respectively. The average mantle length in maturity Stage Ⅴ is shorter than that in Stage Ⅲand Ⅳ. The results suggests that the catch is com
ISSN:2095-0780
DOI:10.3969/j.issn.2095-0780.2012.03.006