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- Title
Daylight occurrence of humpback dolphins Sousa chinensis in Algoa Bay, South Africa.
- Authors
Karczmarski, Leszek; Thornton, Meredith; Cockcroft, Victor G.
- Abstract
This paper describes the pattern of daylight occurrence of humpback dolphins Sousa chinensis in Algoa Bay, the Eastern Cape, South Africa, between May 1991 and May 1994. Two indices, the Sighting Index (SI) and the Total Recorded Dolphin Presence (TRDP), were used to quantify the dolphins' daylight occurrence. Humpback dolphins display a clear pattern of daylight occurrence in Algoa Bay and can be seen mostly in the morning, and, to a lesser extent, in the evening. This pattern varies little between seasons (with possible exception for the evening hours), follows the time of the solar day, is not related to the tidal cycle and is probably governed by the diurnal cycles of dolphins' prey.
- Subjects
SOUTH Africa; ALGOA Bay (South Africa); CHINESE white dolphin; ANIMAL behavior
- Publication
African Journal of Ecology, 2000, Vol 38, Issue 1, p86
- ISSN
0141-6707
- Publication type
Article
- DOI
10.1046/j.1365-2028.2000.00215.x