文章摘要
韦贝贝,黄开,朱国平.西白令海狭鳕夏季卵巢发育特征[J].上海海洋大学学报,2021,30(2):315-322
西白令海狭鳕夏季卵巢发育特征
Ovary development of walleye pollock (Gadus chalcogrammus) in the western Bering Sea summer
投稿时间:2020-02-01  修订日期:2020-03-17
DOI:10.12024/jsou.20200202919
中文关键词: 狭鳕  卵巢  卵巢发育  西白令海
英文关键词: Gadus chalcogrammus  ovary  ovarian development  Bering Sea
基金项目:极地办协同创新平台建设项目(jdxt2019-07);国家自然科学基金(41776185);国家重点研发计划(2018YFC1406801)
作者单位E-mail
韦贝贝 上海海洋大学 海洋科学学院, 上海 201306
上海海洋大学 极地研究中心, 上海 201306 
 
黄开 上海海洋大学 海洋科学学院, 上海 201306
上海海洋大学 极地研究中心, 上海 201306 
 
朱国平 上海海洋大学 海洋科学学院, 上海 201306
上海海洋大学 极地研究中心, 上海 201306
大洋渔业资源可持续开发教育部重点实验室 极地海洋生态系统研究室, 上海 201306
国家远洋渔业工程技术研究中心, 上海 210306 
gpzhu@shou.edu.cn 
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中文摘要:
      根据2017年6-9月和2018年8-9月在西白令海(60°28'N~61°57'N,179°11'E~177°57'W)随机采集的狭鳕卵巢样本,利用组织学分析,描述了狭鳕卵母细胞和卵巢的发育阶段。结果显示,夏季西白令海狭鳕卵巢内同时存在不同时相的卵母细胞,卵母细胞可分为9个发育时相,卵巢分为5个发育阶段;卵巢发育期与叉长、纯体质量、卵巢质量和性腺指数均无统计学上的相关性,且雌性个体的性腺指数无法较好地预测西白令海狭鳕的性成熟度。夏季,所取样的狭鳕大部分不产卵,成熟个体产卵活动不频繁,Ⅱ期和Ⅴ期发育阶段的狭鳕均较少。本研究可为西白令海狭鳕的资源状况评估及渔业可持续发展提供科学依据。
英文摘要:
      The development of gonad is one of important parts for studying fish reproduction biology. Walleye pollock(Gadus chalcogrammus) is the single fish species with the highest commercial catch worldwide. However, the information about the gonadal development, particularly the ovary development of this species in the western Bering Sea is limited. Based on ovarian samples randomly collected from June to September 2017 and August to September 2018 in the western Bering Sea (60°28'N -61°57'N, 179°11'E -177°57'W), histological analysis was used to describe the development stages of the oocytes and ovaries of walleye pollock.The results showed that oocytes in different phases occurred in the ovary of Walleye Pollock in the western Bering Sea. The oocytes of Walleye Pollock were divided into 9 developmental phases, and the ovary was divided into 5 developmental stages.There were no statistically significant correlations between ovarian development and fork length, net mass, ovarian mass and gonadosomatic index, respectively.The gonadosomatic index can't be considered as a good index for predicting the maturity of Walleye Pollock in the western Bering Sea.Most of sampled Walleye Pollock did not spawn during summer, the mature individuals did not ovulate frequently, and few individuals in the second and last stages of development were found in the samples.The present study provided biological information for the stock assessment and sustainable exploitation of Walleye Pollock resources in the western Bering Sea.
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