Horn--Age and growth of bluenose

New Zealand Journal of Marine and Freshwater Research abstracts

Age and growth of bluenose, Hyperoglyphe antarctica (Pisces: Stromateoidei) from the lower east coast, North Island, New Zealand

PETER L. HORN

Ministry of Agriculture and Fisheries P.O. Box 2034, Napier, New Zealand

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 L_X,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.

Keywords Hyperoglyphe antarctica; age determination; growth; otoliths; age validation

PDF file of entire paper: medium quality (1211K); (scanned from paper original: notes about this process)

This year's abstracts | Journal home page | All abstracts | Publishing home page