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African Journal of Marine Science

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STOCK STRUCTURE OF SNOEK THYRSITES ATUN IN THE BENGUELA: A NEW HYPOTHESIS

M H GRIFFITHS

Abstract


It has long been accepted that snoek Thyrsites atun in the Benguela system constitute a single stock that undergoes seasonal longshore migration in waters between southern Angola and the west coast of South Africa. Based on a review of past literature and evaluation of new data, it is contended that Benguela snoek exist rather as two separate sub-populations – divided by the upwelling cell in southern Namibia – with limited, medium-term exchange (c. 5 years), driven mainly by temperature and food availability.



http://dx.doi.org/10.2989/18142320309504025
AJOL African Journals Online