Updated assessments and projections under alternative future catch levels for the horse mackerel resource
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2011
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University of Cape Town
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Abstract
The age-structured production model assessment of Johnston and Butterworth (2007) is updated to take account of further catch and survey data. In addition length-frequency data from surveys and the Desert Diamond, and a GLM standardised CPUE series from the Desert Diamond are now included when fitting the model to the data. The assessments do indicate
an increase in abundance of about 20% over the last five years, primarily as a result of good recruitment. However, long term projections under different levels of future catches remain fairly similar to those of Johnston and Butterworth (2007).
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Furman, L. B. & Butterworth, D. S. (2011). Updated assessments and projections under alternative future catch levels for the horse mackerel resource. FISHERIES.