Abstract
Mean age and length at onset of maturity were estimated for orange roughy (Hoplostethus atlanticus) populations off New Zealand, Namibia, and Great Britain. Significant between-area differences were apparent in both these parameters. Implications of the between-area differences on stock structure of orange roughy in New Zealand waters are discussed. A proportional relationship between age at onset of maturity and modal size of fish in the mature population is demonstrated. This is consistent with later-maturing fish experiencing a longer period at a pre-maturity growth rate that is relatively faster than the rate of somatic growth after maturity.
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Received: 22 December 1997 / Accepted: 5 May 1998
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Horn, P., Tracey, D. & Clark, M. Between-area differences in age and length at first maturity of the orange roughy Hoplostethus atlanticus. Marine Biology 132, 187–194 (1998). https://doi.org/10.1007/s002270050385
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DOI: https://doi.org/10.1007/s002270050385