Regional and intraspecific variation in Sthenoteuthis oualaniensis (Cephalopoda: Ommastrephidae) morphology from the western central Pacific Ocean
文献类型： 外文期刊
作者： Wang, Xue Hui 1 ; Liu, Bi Lin 2 ; Qiu, Yong Song 1 ; Zhang, Peng 1 ; Du, Fei Yan 1 ; Chen, Xin Jun 2 ; Su, Hang 2 ;
作者机构： 1.Chinese Acad Fishery Sci, Guangdong Prov Key Lab Fishery Ecol & Environm, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
2.Shanghai Ocean Univ, Coll Marine Sci, Hucheng Ring Rd 999, Shanghai 201306, Peoples R China
3.Natl Engn Res Ctr Ocean Fisheries, 999 Hucheng Ring Rd, Shanghai 201306, Peoples R China
4.Minist Educ, Key Lab Sustainable Exploitat Ocean Fisheries Res, 999 Hucheng Ring Rd, Shanghai 201306, Peoples R China
5.Minist Agr, Key Lab Ocean Fisheries Explorat, 999 Hucheng Ring Rd, Shanghai 201306, Peoples R China
6.Minist Agr, Sci Observing & Expt Stn Ocean Fishery Resources, 999 Hucheng Ring Rd, Shanghai 201306, Peoples R China
期刊名称：BULLETIN OF MARINE SCIENCE （ 影响因子：1.632； 五年影响因子：1.889 ）
ISSN： 0007-4977
年卷期： 2019 年 95 卷 1 期
页码：
收录情况： SCI
摘要： Regional and intraspecific variation in eight morphometric characters are described for the purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1830 in 1830-1831), from the Bashi Channel and South China Sea. Principal components analysis indicated statistically significant sexual dimorphism for medium forms, but not for the dwarf form. Additionally, principal components analysis using mantle length standardized morphometric variables had considerable overlap, with a correct sex classification rate of <65%. Stepwise discriminant analysis revealed overall correct cross-validated classification rates of only 48.0% for the three squid forms from the Bashi Channel and South China Sea. The lack of significant intraspecific differences in squid from the same area indicates that the underlying cause of morphometric variation is environmental rather than phylogenetic. Finally, the relatively low cross-validated classification rates (<70%) indicate that using morphometric data alone to distinguish the focal sexes and forms is of limited practical utility, and that other types of data, such as genetic or hard tissue morphometrics, hold greater promise.
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