Stock discrimination of hoki (Macruronus novaezelandiae, Merlucciidae) in New Zealand waters using morphometrics
作者:
M. E. Livingston,
K. A. Schofield,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1996)
卷期:
Volume 30,
issue 2
页码: 197-208
ISSN:0028-8330
年代: 1996
DOI:10.1080/00288330.1996.9516708
出版商: Taylor & Francis Group
关键词: stock discrimination;morphometrics;Merlucciidae;New Zealand hoki;blue grenadier
数据来源: Taylor
摘要:
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.
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