Some initial results using the revised two mixing-stock hypothesis for South African sardine

The operating model of the South African sardine resource is being updated from the last assessment (de Moor and Butterworth 2015a) to take account of data collected between 2012 and 2014. New data on the differences in infection of sardine on the west and south coasts by a digenean ‘tetracotyle-type’ metacercarian endoparasite are to be included in the model with the aim of obtaining improved estimates of sardine movement in the two stock hypothesis. In addition, refinements to the previous two mixing stock hypothesis are being considered.

This document presents some initial results from the revised two mixing stock hypothesis.