南海中南部鸢乌贼中型群群体结构

doi:10.13287/j.1001-9332.201704.027

应用生态学报 ›› 2017, Vol. 28 ›› Issue (4): 1370-1376.doi: 10.13287/j.1001-9332.201704.027

南海中南部鸢乌贼中型群群体结构

朱凯^1,2, 杜飞雁¹, 王雪辉^1*, 邱永松¹, 张鹏¹

¹中国水产科学研究院南海水产研究所/广东省渔业生态环境重点开放实验室, 广州 510300
²上海海洋大学, 上海 201306

收稿日期:2016-07-19 出版日期:2017-04-18 发布日期:2017-04-18
通讯作者: * E-mail: wxhscs@163.com
作者简介:朱凯,男,1991年生,硕士研究生.主要从事渔业资源评估与管理研究.E-mail:zhukaild@126.com
基金资助:
本文由广东省科技计划项目(2014A020217011)、国家科技支撑计划项目(2013BAD13B06)和中国水产科学研究院南海水产研究所青年人才培养专项资金资助

Morphological variations and discrimination of medium form of the purple flying squid Sthenoteuthis oualaniensis in the central and southern South China Sea

ZHU Kai^1,2, DU Fei-yan¹, WANG Xue-hui^1*, QIU Yong-song¹, ZHANG Peng¹

¹South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences/Guangdong Province Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, China
²Shanghai Ocean University, Shanghai 201306, China

Received:2016-07-19 Online:2017-04-18 Published:2017-04-18
Contact: * E-mail: wxhscs@163.com
Supported by:
This work was supported by the Science and Technology Planning Project of Guangdong Province, China (2014A020217011), the National Science and Technology Support Program of China (2013BAD13B06), and the Young Talent Training Special Funds of South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences

摘要/Abstract

摘要： 根据2012和2013年在南海中南部采集到的3177尾鸢乌贼中型群样品,对其胴长(ML)、右第一腕长(AL1)、右第二腕长(AL2)、右第三腕长(AL3)、右第四腕长(AL4)、右触腕长(TL)、鳍长(FL)和鳍宽(FW)等形态参数进行测定,并运用主成分分析等方法对其个体的形态差异进行研究.结果表明: 研究海域的鸢乌贼中型群可分为Ⅰ和Ⅱ 2个群体,分别占总数的69%和31%.2个群体的雌性比例均随胴长的增大呈先减少后增加的趋势,直至达到100%;群体Ⅰ雌性和雄性的初次性成熟胴长分别为164和112 mm,群体Ⅱ雌性和雄性初次性成熟胴长分别为157和108 mm.群体Ⅰ在西沙海域和南沙海域均有独立分布区域,而群体Ⅱ密集区主要分布于南沙海域.非参数检验表明:2个群体雌性和雄性个体的全部形态参数均存在显著性差异(P<0.05).在雌性鸢乌贼中,群体Ⅰ和群体Ⅱ的ML、AL1、AL2、AL4、TL和FW存在显著性差异(P<0.05);在雄性鸢乌贼中,群体Ⅰ和群体Ⅱ的ML、AL1、AL2、AL3、AL4和FL存在显著性差异(P<0.01).通过计算差异系数表明,2个群体的形态差异处于种内水平.

Abstract: From 3177 specimens of purple flying squid Sthenoteuthis oualaniensis collected in 2012 and 2013 in the central and southern South China Sea, the morphological indicators including mantle length (ML), arm length-I (AL1), arm length-Ⅱ (AL2), arm length-Ⅲ (AL3), arm length-Ⅳ (AL4), tentacle length (TL), fin length (FL) and fin width (FW) were measured. The morphological variations among the squid species were analyzed using principal component analysis. Results showed that the medium form could be distinguished into cohort I and cohort II which accounted for 69% and 31% of the total, respectively. The percentage of females of the two cohorts decreased first with increasing ML, then increased and reached the ratio of 100% finally. Using Logistic regressing, the MLs at first maturity for females and males of cohort I were estimated to be 164 mm and 112 mm, respectively, and those for females and males of cohort II were 158 mm and 109 mm, respectively. The cohort I concentrated in the waters of Xisha Islands and Nansha Islands, whereas the cohort II was located in the waters of Nansha Islands. Significant differences in all the 8 morphological indicators between either males or females of cohort I and cohort II were found (P＜0.05). Significant differences between cohort I and cohort II in ML, AL1, AL2, AL4, TL and FW were identified in females (P＜0.05), while significant differences between cohort I and cohort II in ML, AL1, AL2, AL3, AL4 and FL were found in males (P＜0.01). The analysis of coefficients of difference indicated that the morphological variations between cohort I and cohort II suggested a clear division within the species.

朱凯, 杜飞雁, 王雪辉, 邱永松, 张鹏. 南海中南部鸢乌贼中型群群体结构[J]. 应用生态学报, 2017, 28(4): 1370-1376.

ZHU Kai, DU Fei-yan, WANG Xue-hui, QIU Yong-song, ZHANG Peng. Morphological variations and discrimination of medium form of the purple flying squid Sthenoteuthis oualaniensis in the central and southern South China Sea[J]. Chinese Journal of Applied Ecology, 2017, 28(4): 1370-1376.

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南海中南部鸢乌贼中型群群体结构

Morphological variations and discrimination of medium form of the purple flying squid Sthenoteuthis oualaniensis in the central and southern South China Sea

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