Residence and site fidelity of Sotalia guianensis in the Caravelas River Estuary, eastern Brazil

Between April 2002 and April 2005, 210 estuarine dolphin groups were sighted, with 58 animals individually identified. Fifteen dolphins were photo-identified just once, while only two animals were sighted in 15 different months. Some individuals showed long-term residence (more than 3 y). Residence...

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Bibliographic Details
Published in:Journal of the Marine Biological Association of the United Kingdom 2007-02, Vol.87 (1), p.207-212
Main Authors: Rossi-Santos, Marcos R., Wedekin, Leonardo L., Monteiro-Filho, Emygdio L.A.
Format: Article
Language:English
Subjects:
Animals
Aquatic mammals
Brackish
Cetacea
Coasts
Dolphins & porpoises
ECOLOGY
Estuaries
Heterogeneity
Rivers
Site fidelity
Sotalia guianensis
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Summary:Between April 2002 and April 2005, 210 estuarine dolphin groups were sighted, with 58 animals individually identified. Fifteen dolphins were photo-identified just once, while only two animals were sighted in 15 different months. Some individuals showed long-term residence (more than 3 y). Residence rates showed heterogeneity in the dolphin's permanence of the estuary, with 60% of the individuals with low numbers (
ISSN:0025-3154
1469-7769
DOI:10.1017/S0025315407055683