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| 东太平洋赤道附近海域茎柔鱼(Dosidicus gigas) 渔业生物学的初步研究 |
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陈新军1,2,3, 李建华1, 易 倩1, 刘必林1,2,3, 杨铭霞1, 陆化杰1,2,3
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1.上海海洋大学海洋科学学院;2.上海海洋大学大洋生物资源开发和利用上海市高校重点实验室;3.上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室
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| 摘要: |
| 根据2011年东太平洋赤道附近海域探捕期间采集的1178尾茎柔鱼样本, 进行了茎柔鱼的生物学特性研究。结果表明: 茎柔鱼胴长范围为201—421mm, 平均胴长为290mm, 优势胴长为260—320mm; 体重范围为200—2650g, 平均体重为1000g, 优势体重为600—1000g; 胴长与体重关系呈幂指数关系; 雌、雄性比为2.59 : 1; 性腺成熟度以I、Ⅱ期为主; 缠卵腺长和缠卵腺重随着性腺的成熟而逐步增大; 雌性初次性成熟胴长为397.2mm; 摄食等级以0—1级为主; 与其它海域相比, 该海域茎柔鱼个体差异明显, 主要为小型群体。 |
| 关键词: 茎柔鱼, 渔业生物学, 东太平洋赤道海域 |
| DOI：10.11693/hyhz201206029029 |
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| 基金项目:国家“863”高技术研究发展计划, 2012AA092303 号; 国家发改委产业化专项, 2159999 号; 上海市科技创新行动计划, 12231203900号。 |
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| PRELIMINARY STUDY ON FISHERIES BIOLOGY OF DOSIDICUS GIGAS IN THE WATERS NEAR THE EQUATOR OF EASTERN PACIFIC OCEAN |
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CHEN Xin-Jun1,2,3, LI Jian-Hua1, YI Qian1, YI Qian1,2,3, YANG Ming-Xia1, LU Hua-Jie1,2,3
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1.College of Marine Sciences, Shanghai Ocean University;2.The Key Laboratory of Oceanic Fisheries Resources Exploitation of Shanghai Education Commission, Shanghai Ocean University;3.The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resourc
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| Abstract: |
| Based on the samples of 1178 squids in total from Chinese squid jigging vessels near the equator of the eastern Pacific in 2011, the biological characteristics of Dosidicus gigas were studied. The results showed that the range of mantle length was from 201 to 421mm and the average attained 290mm, the dominant mantle length ranged from 260 to 320mm. Body weight was from 200g to 2650g and the average attained 1000g, the dominant body weight ranged from 600 to 1000g. The equation of the relationship between mantle length and body weight was fitted by power exponent. The sexual ratio of female to male was 2.59 : 1. The sexual maturity stage dominated I and II. The length and weight of nidamental gland of D. gigas increased with the growth of gland maturity. And the mantle length of first maturity of females was 397.2mm. The feeding stage dominated 0—1. It can be found that D. gigas near the equator is obvious different from that in the Gulf of California and waters off Chile, Peru and Costa Rica. We can conclude that the population of D. gigas near the equator of the eastern Pacific belongs to small group. |
| Key words: Dosidicus gigas, Fisheries biology, Near the equator of eastern Pacific Ocean |