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Blue grenadier, Macruronus novaezelandiae, from south-eastern Australian waters were aged, using their otoliths (whole and in transverse thin sections). The greatest recorded age was 25 years. A double blind test showed that the recorded ages were sufficiently reproducible to use in fitting growth curves (Index of Average Percent Error: 8%), but not sufficiently so to assign individuals to particular year-classes. Von Bertalanffy growth curves were fitted to both length and weight data. For males, Lt = 90. 7 (1 - exp-0. 256 (t + 1. 21) } and Wt = 2. 62 (1 - exp-0. 277 (t + 1. 39) }3. For females, Lt = 99. 3 l - exp-0. 203 (t + 1. 48) and Wt = 4. 161 - exp-0. 157 (t + 2. 93) 3. L is the length in centimetres, W is the weight in kilograms and t is the age in years. A comparison with length-frequency modes validated the growth curves for immature fish, but no validation was possible for the adults. The exes have qignificantly different growth patterns. Their growth parameters are typical of those of commercially exploited, temperate gadoid fishes and show no modification for the deep-water zone inhabited by blue grenadier.
Kenchington et al. (1987) studied this question.