Patterns in the Annual Weight Incrementfor Div. 2J+3KL Cod and Possible Prediction for Stock Projection
- 1 December 1999
- journal article
- Published by Northwest Atlantic Fisheries Organization (NAFO) in Journal of Northwest Atlantic Fishery Science
- Vol. 25, 151-159
- https://doi.org/10.2960/j.v25.a14
Abstract
Sample body weight-at-age data for NAFO Divisions 2J+3KL cod (Gadus morhua) from research vessel surveys were examined. Considerable variability in annual weight increment was found. A general linear model containing division and age effects explained 36% of the variance in the logarithm of annual weight increment. The residuals from this model showed a temporal pattern which appears to correspond to changes in the area of the cold intermediate layer (<0°C), an indicator of the amount of cold water on the shelf. Including the area of the CIL resulted in a model which explained 41% of the variability in weight increments. This model predicted weight increment data not included in the fitting reasonably well. Consideration is given to whether a predictive model based on this relationship could be useful in stock projections.This publication has 0 references indexed in Scilit: