Document Type

Article

Publication Date

2002

Publication Title

CCAMLR Science

Volume

9

Pages

1-10

Abstract

We used the otoliths from a sample of Dissostichus eleginoides pre-recruits, whose length density was distinctly polymodal, to see whether ages estimated by reading otoliths were congruent with the length modes observed. Length densities by age were compared graphically with the overall length density observed. Additionally, ages were predicted for each fish based on length, and compared with ages estimated from reading otoliths in a goodness-of-fit test. The majority of the otoliths (83.6%) were estimated to be from fish 1+ or 2+ years old, with mean total lengths of 32.5 cm and 41.3 cm respectively. No difference was found between predicted and estimated ages. We conclude that the two dominant modes observed in the length density represent different age cohorts separated by one year.

Comments

Originally published in CCAMLR Science.

Posted with the permission of the publisher.

Original Publication Citation

Ashford, J., Jones, C., Bobko, S., & Everson, I. (2002). Length-at-age in juvenile patagonian toothfish (dissostichus eleginoides). CCAMLR Science, 9, 1-10.

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