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个体生长对秘鲁外海茎柔鱼角质颚形态变化的影响
引用本文:胡贯宇,陈新军,方舟.个体生长对秘鲁外海茎柔鱼角质颚形态变化的影响[J].水产学报,2016,40(1):36-44.
作者姓名:胡贯宇  陈新军  方舟
作者单位:1. 上海海洋大学海洋科学学院,上海201306;远洋渔业协同创新中心,上海201306;2. 上海海洋大学海洋科学学院,上海201306;远洋渔业协同创新中心,上海201306;国家远洋渔业工程技术研究中心,上海201306;大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306
基金项目:国家自然科学基金(41306127,41276156);上海市自然科学基金(13ZR1419700);上海市教委创新项目(13YZ091);教育
摘    要:为研究个体生长对茎柔鱼角质颚形态变化的影响,本研究根据2009–2014年中国鱿钓船在秘鲁外海(79°22′~84°30′W、10°00′~18°16′S)采集的茎柔鱼样本,提取出1208尾茎柔鱼的角质颚,对角质颚的12项外部形态进行测量,并利用角质颚微结构的生长纹来估算茎柔鱼的日龄,采用方差分析法(ANOVA)分析了不同胴长组、不同日龄组以及不同性成熟阶段角质颚主要外部形态特征的差异。结果表明,角质颚各形态参数在雌、雄个体间的差异性极显著(P0.01),且雌性个体的角质颚大于雄性个体。最小显著差多重比较法(LSD)结果显示,在不同胴长组、不同日龄组和不同性成熟阶段,雌、雄个体角质颚的生长存在差异,相同性别个体角质颚不同部位的生长也不同;在胴长大于400 mm、雌性个体大于300日龄、雄性个体大于250日龄以及性腺成熟度在Ⅲ期以后时,角质颚的生长较为缓慢。研究表明,个体大小、日龄和性成熟对茎柔鱼角质颚的形态变化有一定的影响。

关 键 词:茎柔鱼  角质颚  形态学  日龄  性成熟
收稿时间:7/8/2015 12:00:00 AM
修稿时间:2015/10/14 0:00:00

Effect of individual growth on beak morphometry of jumbo flying squid, Dosidicus gigas off the Peruvian Exclusive Economic Zone
HU Guanyu,CHEN Xinjun and FANG Zhou.Effect of individual growth on beak morphometry of jumbo flying squid, Dosidicus gigas off the Peruvian Exclusive Economic Zone[J].Journal of Fisheries of China,2016,40(1):36-44.
Authors:HU Guanyu  CHEN Xinjun and FANG Zhou
Institution:College of Marine Sciences of Shanghai Ocean University Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China,College of Marine Sciences of Shanghai Ocean University Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China;National Distant-water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai 201306, China;The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China and College of Marine Sciences of Shanghai Ocean University Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China
Abstract:In order to study the effect of individual growth on beak morphology of Dosidicus gigas, the samples of the jumbo flying squid were collected by the Chinese jigging fleet between 2009 and 2014 off the Peruvian Exclusive Economic Zone (79°22'-84°30'W, 10°00'-18°16'S). The beaks were extracted from 1208 samples and 12 morphometric parameters of beaks were measured. Meanwhile, the microstructure of beak was used to estimate the age of D. gigas. The differences of beak morphometry were analyzed which were influenced by body size, age and sexual maturity. The results showed that upper hood length (UHL), upper crest length (UCL), upper lateral wall length (ULWL), lower crest length (LCL), lower rostrum length (LRL) and lower lateral wall length (LLWL) could be used to represent the length features of beak. The ANOVA indicated that morphologic parameters of beak had significant differences between females and males, the average of the beak morphometric parameters of females was greater than that of males. The Least Significant Difference (LSD) analysis showed that the growth of beak between females and males varied according to mantle length, age and sex maturity. The growth had differences among the sections of beak of same sex individuals. However, if the mantle length is greater than 400mm, the age of female is greater than 300 days, the age of male is greater than 250 days or the sex maturity stage is greater than stage 3, then the growth of beak is slow. This study suggested that the morphometry of beak was influenced by body size, age and sex maturity.
Keywords:Dosidicus gigas  beak  morphometry  age  sex maturity
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