Allozyme differentiation of sixteen species of ommastrephid squid (Mollusca, Cephalopoda)

• Published in: Antarctic Science
• Main Author: Yokawa, K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1994
• Subjects: Geology; Ecology, Evolution, Behavior and Systematics; Oceanography; Antarctic Science
• Online Access: http://dx.doi.org/10.1017/s0954102094000313; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102094000313

Allozyme differentiation was investigated at 23 putative enzyme coding loci in 16 ommastrephid squids to identify species and to assess genetic relationships. The species examined were Illex illecebrosus, I. coindetii, I. argentinus, Todaropsis eblanae, Todarodes sagittatus, T. angolensis, T. filippovae, T. pacificus pacificus, Nototodarus sloanii, N. gouldi, Martialia hyadesi, Ommastrephes bartramii, Sthenoteuthis pteropus, S. oualaniensis, Eucleoteuthis luminosa, and Dosidicus gigas. A dendrogram based on Nei's genetic distance between the species closely approximates to the latest systematics based on morphological characters, but the positions of M. hyadesi and T. eblanae were considerably distant from all other species. The results demonstrate the benefits of further biochemical analysis to an understanding of the systematics of the ommastrephid squids.