The Benguela ecosystem: part VI. Seabirds
Berruti, A.; Adams, N.J.; Jackson, S. (1989). The Benguela ecosystem: part VI. Seabirds, in: Barnes, H.B. et al. Oceanogr. Mar. Biol. Ann. Rev. 27. Oceanography and Marine Biology: An Annual Review, 27: pp. 273-335 In: Barnes, H.B. et al. (1989). Oceanogr. Mar. Biol. Ann. Rev. 27. Oceanography and Marine Biology: An Annual Review, 27. Aberdeen University Press: Aberdeen. ISBN 0-08-0363970-0. 468 pp., more In: Oceanography and Marine Biology: An Annual Review. Aberdeen University Press/Allen & Unwin: London. ISSN 0078-3218; e-ISSN 2154-9125, more |  |
| Keywords | Aquatic organisms > Marine organisms > Aquatic birds > Marine birds
Breeding
Distribution > Ecological distribution
Literature reviews
Motion > Water motion > Vertical water movement > Upwelling
Marine/Coastal |
| Authors | | Top | - Berruti, A.
- Adams, N.J.
- Jackson, S.
| | |
| Abstract | The ecology of seabirds in the Benguela upwelling system off western southern Africa is reviewed. The marine avifauna comprises a distinctive assemblage of 12 breeding seabirds and 36 species which are regular non-breeding visitors. Research has concentrated on the resident seabirds, particularly on the interaction between the three most abundant species, the Cape gannet Morus capensis , jackass penguin, Spheniscus demersus , and Cape cormorant Phalacrocorax capensis, and their commercially-exploited fish prey, notably the pilchard Sardinops ocellatus and anchovy Engraulis japonicus capensis . Changes in the population sizes and the diets of these three species are consistent with changes in the catches of the purse-seine fisheries. The pelagic ecology of the non-breeding seabirds and the responses of seabirds to small-scale and mesoscale variability are poorly known. Bottom-trawling activities appear, however, to be an important determinant of the distribution of the larger non-breeding species. |
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