Age and growth of bluenose,Hyperoglyphe antarctica (Pisces: Stromateoidei) from the lower east coast,North Island,New Zealand |
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| Authors: | Peter L Horn |
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| Institution: | Ministry of Agriculture and Fisheries , P.O. Box 2034, Napier, New Zealand |
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| Abstract: | Growth of the bluenose, Hyperoglyphe antarctica (Carmichael, 1818) from the lower east coast, North Island, was determined by counting growth check rings in otoliths. One growth check ring appeared to be laid down each year, so this technique is probably valid for aging bluenose. Female fish had a significantly higher growth rate than males. Comparisons of samples from three sites indicated no significant regional differences in growth. The von Bertalanffy parameters L8,K, and t0 fitted to back‐calculated fish lengths were, respectively, 81.1 cm, 0.308, ‐0.627 for males, and 86.1 cm, 0.308, ‐0.384 for females. |
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| Keywords: | Hyperoglyphe antarctica age determination growth otoliths age validation |
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