刘必林,陈新军,陈海刚,胡贯中,李建华.秘鲁外海茎柔鱼繁殖生物学研究[J].上海海洋大学学报,2016,25(3):445-453.
LIU Bilin,CHEN Xinjun,CHEN Haigang,HU Guanzhong,LI Jianhua.Reproduction of the Humboldt squid (Dosidicus gigas) off Peru[J].Journal of Shanghai Ocean University,2016,25(3):445-453. |
| 秘鲁外海茎柔鱼繁殖生物学研究 |
| Reproduction of the Humboldt squid (Dosidicus gigas) off Peru |
| 投稿时间：2015-01-17 修订日期：2015-09-25 |
| DOI：10.12024/jsou.20150101319 |
| 中文关键词: 茎柔鱼 秘鲁外海 繁殖生物学 种群 产卵场 |
| 英文关键词: Dosidicus gigas off Peru reproduction population spawning ground |
| 基金项目:国家自然科学基金(NFSC41306127,NSFC41276156);上海市自然科学基金(13ZR1419700);上海市教育委员会创新项目(13YZ091);教育部博士点基金(20133104120001);广东省生态环境重点实验室开放基金(LFE-2014-1) |
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| 中文摘要: |
| 根据我国鱿钓渔船2008年1月至2010年10月在秘鲁外海采集的2 489尾茎柔鱼样本,对其繁殖生物学内容进行了分析。结果表明,渔获以雌性个体为主,雌雄比例为3.99:1。渔获物成熟个体所占比例较小,雌、雄分别为10.4%和21.3%,但各月均有成熟雌性个体出现,说明茎柔鱼全年产卵。茎柔鱼Ⅰ~Ⅳ期性腺指数随着性腺成熟度等级增加而不断增大(P<0.05),Ⅴ期时随着生殖作用的进行性腺指数较Ⅳ期有所下降。缠卵腺重与缠卵腺长呈明显的幂函数关系。茎柔鱼Ⅰ~Ⅳ期缠卵腺指数随着性腺成熟度等级增加而不断增大(P<0.05),Ⅴ期时随着排卵作用进行缠卵腺指数较Ⅳ期有所下降。成熟个体比率与胴长拟合Logistic曲线显示,雌性茎柔鱼性成熟胴长为539 mm,雄性为507 mm。 |
| 英文摘要: |
| In this study, we analyzed the reproduction of the Humboldt squid (Dosidicus gigas) based on 2 489 individuals collected off the Peruvian waters during January 2008 to October 2010 by Chinese jigging vessels. The number of females of D. gigas was significantly greater than that of males in the study area and the ratio of female to male was 3.99:1. The occurrence of mature individuals in each month showed that D. gigas spawn all the year round, although only 10.4% females and 21.3% males matured among the total samples. Nidamental length showed significant power correlations with nidamental weight. Nidamental gland and gonad somatic index increased with gonad maturity gradually from gonad maturity Stage Ⅰ to Ⅳ, but slightly decreased at Stage Ⅴ due to mating and spawning (P<0.05). The relative frequency distribution for mantle length classes fitted Logistic model. This showed that mantle length at maturity of D. gigas was 539 mm for females, and 507 mm for males. |
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