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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Comparative analysis of the diets of smaller odontocete cetaceans along the coast of Southern Africa
South African Journal of Marine Science, Volume 12, No. 1, Year 1992
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Description
The diets of 20 species of smaller Odontoceti were investigated. The material was collected along the southern African coast between 1966 and 1990 and included 158 strandings, 29 animals killed incidentally and 49 animals caught under permit. In total, 57 species in 34 families of fish and 89 species in 24 families of cephalopods were identified from remains in the 236 stomachs investigated. Most Odontoceti fed on commercially unexploited cephalopods and fish, or on fish below commercially utilized sizes. However, the average sizes of anchovy and pilchard eaten by Delphinus delphis and Lagenorhynchus obscurus were larger than the sizes most frequently taken commercially. The species composition of the prey items reflected the onshore-offshore distribution (and possibly the foraging depths) of different Odontoceti. Tursiops truncatus and Cephalorhynchus heavisidii were closest to shore and D. delphis and L. obscurus over the continental shelf. The rest were distributed around the shelf-edge and just off the edge. A comparison of the stomach contents of stranded and non-stranded D. delphis, L. obscurus and C. heavisidii demonstrated that results from stranded animals are biased. © 1992 Taylor & Francis Group, LLC.
Authors & Co-Authors
Sekiguchi, K.
South Africa, Pretoria
University of Pretoria
Klages, Norbert T.W.
South Africa, Humewood
Port Elizabeth Museum
Best, P. B.
South Africa, Pretoria
University of Pretoria
Statistics
Citations: 120
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.2989/02577619209504746
ISSN:
02577615