Uozomi et al.--Martialia hyadesi in New Zealand waters

New Zealand Journal of Marine and Freshwater Research abstracts

Distribution and morphological characters of immature Martialia hyadesi (Cephalopoda: Oegopsida) in New Zealand waters

YUJI UOZUMI

Far Seas Fisheries Research Laboratory 7-1-5 Orido, Shimizu 424, Japan

ELLEN CELIA FORCH

Fisheries Research Centre
P. O. Box 297, Wellington, New Zealand
Present address: 18 Waitohu Road, Eastbourne, Wellington, New Zealand

TOSfflO OKAZAKI

National Research Institute of Aquaculture 224-1, Hiruta, Tamaki, Watarai, Mie 519-04, Japan

Abstract Before 1985, Martialia hyadesi (Cephalopoda: Ommastrephidae) in the Pacific Ocean was known only from the Eltanin Fracture Zone and Macquarie Island. A joint Japan-New Zealand squid survey around New Zealand captured many immature ommastrephid squids. Gel electrophoresis confirmed the presence of immature M. hyadesi. Aspects of the external morphology are described. The distinctive tentacle club was evident in the smallest specimen examined, 19 mm dorsal mantle length (ML). Arm trabeculae were first evident in specimens of 40-50 mm ML. Immature squid were distributed around and southward of the Subtropical Convergence Zone. The presence of very small squid (< 10 mm ML) indicated spawning on or near the Auckland Island Shelf.

Keywords Ommastrephidae; Martialia hyadesi; Auckland Islands; trabeculae; gel electrophoresis; Argentina Far Seas Fisheries Research Laboratory contribution 255

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