New Zealand Journal of Marine and Freshwater Research abstracts

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Evidence for two species of arrow squid in the New Zealand fishery

P. J. SMITH

P. E. ROBERTS

R. J. HURST

Fisheries Research Division Ministry of Agriculture and Fisheries P. O. Box 297 Wellington, New Zealand

Abstract Electrophoresis, comparative morphology, and prevalence of parasites were examined in arrow squid Nototodarus sloani from New Zealand waters. Electrophoresis revealed 2 alleles at the a-glycerophosphate dehydrogenase locus. Specimens from eastern and southern areas of New Zealand were fixed for a slow allele and specimens from western areas were fixed for a fast allele. Two types of hectocotylised ventral arms were observed in mature males; one type was found in eastern and southern areas a*hd die other in western areas. Nybelinia sp. post-larvae showed high infestation levels in western squid, but none were found in eastern and southern specimens. It is concluded that there are 2 species of arrow squid in New Zealand and that these are associated with the major water masses. Some overlap between the species was found in fishery areas Cook Strait, Tasman Bay, and Egmont.

Keywords Nototodarus sloani; electrophoresis; hectocotylus; Nybelinia; Anisakis simplex; parasites; fishery resources.

New Zealand Journal of Marine and Freshwater Research, 1981, Vol. 15 : 247-253 Received 3 March 1981

PDF file of entire paper: medium quality (512K); (scanned from paper original: notes about this process)

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