New Zealand Journal of Marine and Freshwater Research abstracts
Stock discrimination of hoki (Macruronus novaezelandiae, Merlucciidae)
in New Zealand waters using morphometrics
M. E. LIVINGSTON
K. A. SCHOFIELD
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 14-901
Kilbirnie, Wellington, New Zealand
Abstract We compared morphometric features of adult-size
(75-95 cm total length) hoki, Macruronus novaezelandiae, from the two
main spawning grounds (West Coast South Island, Cook Strait) and from the two
main areas of dispersal (Auckland Island-Campbell Plateau, Chatham Rise) to
determine if more than one stock is evident. Significant differences (P
> 0.001) in head shape were found between the two spawning grounds and
between the dispersed areas. When sample sets from the four areas were
combined, West Coast and Cook Strait spawning samples were the least similar.
Auckland Island-Campbell Plateau stock morphometrics were closest to West
Coast, while those of Chatham Rise were closest to Cook Strait's. The data
provide strong evidence that Cook Strait and West Coast spawners are from
different stocks. There is also some support for the hypothesis that Auckland
Island-Campbell Plateau hoki are from the same stock as the West Coast
spawners, and that Chatham Rise hoki are from the same stock as the Cook Strait
spawners.
Keywords stock discrimination; morphometrics; Merlucciidae;
New Zealand hoki; blue grenadier
New Zealand Journal of Marine and Freshwater Research, 1996: Vol. 30:
197-208
0028-8330/96/3002-0197 $2.50/0 (c) The Royal Society of New Zealand
1996
PDF file of entire paper: medium quality (728K); (scanned from paper original: notes about this process)
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