Influence of the sardine run on selected nearshore predatory teleosts in KwaZulu-Natal

  • ST Fennessy
  • P Pradervand
  • PA de Bruyn

Abstract

The relationships between shore-angling catch rates of nearshore predatory teleosts in KwaZulu-Natal, South Africa, and the timing of the sardine run were examined using a multiple regression model. Results showed that catch rates of five (elf Pomatomus saltatrix, garrick Lichia amia, king mackerel Scomberomorus commerson, blacktip kingfish Caranx heberi and kingfish Caranx spp.) of the nine teleost predators selected for their predatory habits on sardine Sardinops sagax were significantly higher during the months of the sardine run (June–July/August). This corroborates anecdotal and scientific reports of close associations between these predatory fish and the run. It is not clear whether these relationships can be ascribed to a feeding migration by the predators, a reproductive migration by the predators or an extension of suitable habitat for both prey and predators during these months. It is possible that the misidentification of some predatory species may have confounded the results for some species, or that these species are not as strongly influenced by the sardine run as previously thought.

Keywords: CPUE, feeding, linefish, migration, recreational fishing, sardine, spawning

African Journal of Marine Science 2010, 32(2): 375–382

Author Biographies

ST Fennessy
Oceanographic Research Institute of the University of KwaZulu-Natal, PO Box 10712, Marine Parade 4056, South Africa
P Pradervand
1/44 Waripori Street, Berhampore, Wellington 6021, New Zealand
PA de Bruyn
AZTI Tecnalia, Herrera kaia portualdea z/g, 20110 Pasaia (Gipuzkoa), Spain
Published
2010-10-13
Section
Articles

Journal Identifiers


eISSN: 1814-2338
print ISSN: 1814-232X