Skip to main content

A Comparison Between Age Determinations of the Antarctic Fish Notothenia gibberifrons Lönnberg Using Scales and Otoliths

Request Meeting Document
Document Number:
WG-FSA-89/13
Author(s):
R. Coggan (United Kingdom), K. Skora (Poland), A. Murray and M. White (United Kingdom)
Accessibility Categories
Open Access (OA)
Review Finalised:
No
Agenda Item(s)
Abstract

Scales and otoliths were collected from 304 specimens of the Antarctic fish Notothenia gibberifrons. When interpreted separately, only 25% of scale and otolith readings agreed. When a scale and otolith from a single simultaneously, 75% of readings agreed. of otolith readings changed between specimen were interpreted 60% of scale readings and 30% separate and simultaneous interpretations. Estimates of age tend to be lower when made from scales. Predictions of yield per recruit utilising age data derived from scales are approximately 30% greater than predictions utilising age data derived from otoliths.