南海南部鸢乌贼中型群与微型群形态学差异及其判别分析*

doi:10.11978/2016011

热带海洋学报 ›› 2016, Vol. 35 ›› Issue (6): 82-88.doi: 10.11978/2016011CSTR: 32234.14.2016011

南海南部鸢乌贼中型群与微型群形态学差异及其判别分析^*

朱凯^{1, 2}, 王雪辉¹, 张鹏¹, 杜飞雁¹, 邱永松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, 广东广州 510300;
2. 上海海洋大学, 上海 201306

收稿日期:2016-01-29 修回日期:2016-03-20 出版日期:2016-11-30 发布日期:2016-12-15
通讯作者: 王雪辉。E-mail: wxhscs@163.com
作者简介:作者简介：朱凯(1991-), 男, 山东省东营市人, 硕士研究生, 研究方向为渔业资源评估与管理。E-mail: zhukaild@126.com
基金资助:
广东省科技计划项目(2014A020217011); 国家科技支撑计划课题(2013BAD13B06); 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; *课题组陈森、李杰、晏磊、杨炳忠、王亮根、郭伟龙等在样品、数据采集和绘制图表过程中提供帮助, 特致谢忱！

A study on morphological variations and discrimination of medium and dwarf forms of purple flying squid Sthenoteuthis oualaniensis in the southern South China Sea

ZHU Kai^{1, 2}, WANG Xuehui¹, ZHANG Peng¹, DU Feiyan¹, QIU Yongsong¹

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

Received:2016-01-29 Revised:2016-03-20 Online:2016-11-30 Published:2016-12-15
Contact: WANG Xuehui. E-mail: wxhscs@163.com
Supported by:
Science and Technology Planning Project of Guangdong Province (2014A020217011); National Key Technology

摘要/Abstract

摘要： 根据2012年和2013年南海南部渔业资源调查采集到的3435尾鸢乌贼样品的胴长(ML)、右第一腕长(AL1)、右第二腕长(AL2)、右第三腕长(AL3)、右触腕长(TL)、鳍长(FL)、鳍宽(FW)等形态指标的测定结果, 运用种群分类、主成分分析和逐步判别函数等方法对其个体的形态学差异进行研究。结果表明: 南海南部鸢乌贼中型群和微型群具有不同的ML分布, 雌性个体中两个种群的ML非重叠范围为59~78mm和126~225mm, 包含45%的中型群和10%的微型群; 雄性个体中两个种群的ML非重叠范围分别为56~80mm和95~151mm, 包含98%的中型群和58%的微型群。均数差异显著性检验表明, 鸢乌贼两个种群的雌、雄个体在各形态比参数上均存在显著差异(p<0.05): 微型群雌性和雄性个体在AL1/ML、FL/ML、FW/ML上存在显著差异(p<0.05); 中型群雌性和雄性个体在AL1/ML、AL2/ML、AL3/ML、TL/ML、FL/ML、FW/ML上存在显著差异(p<0.05)。差异系数(C.D)计算表明, 鸢乌贼两个种群的形态差异总体上处于种内水平(除雄性FW/ML外, C.D均小于1.28), 而雄性鸢乌贼中两个种群的FW/ML差异达到了亚种水平(C.D=1.45)。主成分分析发现第二和第三主成分分别代表各腕之间和腕与鳍之间的生长差异。依据各形态比参数进行判别分析, 鸢乌贼雌性和雄性个体中两个种群的总体判别准确度分别达到85.9%和92.9%, 可以为鸢乌贼种群区分提供参考。

关键词: 鸢乌贼, 形态学, 种群分类, 南海

Abstract: From 3435 specimens of purple flying squid Sthenoteuthis oualaniensis collected in 2012 and 2013 in the southern South China Sea, mantle length (ML) and other seven morphological indicators were measured. The morphological variations among the squid species were assessed using population classification, principal component analysis and stepwise discriminant functions. Results showed that medium and dwarf forms have different ML distribution. The non-overlapping ranges of ML are 59~78 mm and 126~225 mm for medium and dwarf forms in female individuals, respectively, which contain 45% of medium form and 10% of dwarf form. The non-overlapping ranges of ML are 56~80 mm and 95~151 mm for medium and dwarf forms in male individuals, respectively, which contain 98% of medium form and 58% of dwarf form. Significant differences in all the ratios of the seven morphological indicators to ML between the medium and dwarf forms of males and females were found by tests of significance (p<0.05). Significant differences between males and females in AL1 (Arm Length-I)/ML, FL (Fin Length)/ML, and FW (Fin Width)/ML were identified in the dwarf form (p<0.05), while significant differences between males and females in AL1/ML, AL2/ML, AL3/ML, TL (Tentacle Length)/ML, FL/ML, and FW/ML were found in the medium form (p<0.05). The analysis of coefficients of difference (C.D) indicated that the morphological variations between the medium and dwarf forms generally were within species (C.D were less than 1.28 except for FW/ML of males), but the FW/ML variations between the medium and dwarf forms of males attained a level of difference between subspecies (C.D=1.45). Principal component analysis indicated that the second principal component represents the growing differences among the wrists and fins, and the third principal component represents the growing differences among the wrists. The discriminant functions based on the morphological ratios have the identification accuracy of 85.9% and 92.9%, respectively, for the two forms of females and males, which can provide a reference for classification of squid species.

Key words: Sthenoteuthis oualaniensis, morphology, population classification, South China Sea

朱凯, 王雪辉, 张鹏, 杜飞雁, 邱永松. 南海南部鸢乌贼中型群与微型群形态学差异及其判别分析^*[J]. 热带海洋学报, 2016, 35(6): 82-88.

ZHU Kai, WANG Xuehui, ZHANG Peng, DU Feiyan, QIU Yongsong. A study on morphological variations and discrimination of medium and dwarf forms of purple flying squid Sthenoteuthis oualaniensis in the southern South China Sea[J]. Journal of Tropical Oceanography, 2016, 35(6): 82-88.

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南海南部鸢乌贼中型群与微型群形态学差异及其判别分析^*

A study on morphological variations and discrimination of medium and dwarf forms of purple flying squid Sthenoteuthis oualaniensis in the southern South China Sea

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