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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Aspects of behavioral ecology of Sotalia guianensis in Sepetiba Bay, southeast Brazil
Marine Mammal Science, Volume 24, No. 3, Year 2008
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Description
Boat-based surveys were conducted from August 2002 to July 2003 to study the activity patterns, spatial pattern of area use, and group characteristics of Sotalia guianensis in Sepetiba Bay, southeast Brazil. Predetermined routes covered the entrance and interior of the bay, resulting in 210 dolphin sightings during 3,300 km total effort. Data on activity were collected using scan group sampling with instantaneous recording after 5 min of observation. Dolphins were sighted more frequently in the entrance of the bay, where water is deeper, and salinity and transparency are higher, than in the interior of the bay, where the environment is more influenced by freshwater inputs. Foraging and feeding were the most frequent activities, and occurred predominantly between 0600 and 1000. Foraging and feeding peaked during ebbing, low, and flooding tides, while socializing predominated at high tide. Mean group size was larger in the interior of the bay and when seabirds were present. Large aggregations containing >100 individuals of Sotalia guianensis seen year-round indicate that Sepetiba Bay is an important area for this species in coastal Brazil. © 2008 by the Society for Marine Mammalogy.
Authors & Co-Authors
Flach, Leonardo
Brazil, Rio de Janeiro
Projeto Boto-cinza
South Africa, Pretoria
University of Pretoria
Flach, Patricia A.
Brazil, Rio de Janeiro
Projeto Boto-cinza
Chiarello, Adriano G.
Brazil, Belo Horizonte
Pontificia Universidade Catolica de Minas Gerais
Statistics
Citations: 47
Authors: 3
Affiliations: 3
Identifiers
Doi:
10.1111/j.1748-7692.2008.00198.x
ISSN:
08240469
e-ISSN:
17487692
Research Areas
Environmental
Study Design
Cross Sectional Study