Produção Nacional
USO DE HÁBITAT Y PRINCIPALES COMPORTAMIENTOS DEL DELFÍN GRIS (Sotalia guianensis, VAN BÉNÉDEN, 1864) EN LA BAHÍA NORTE, ESTADO DE SANTA CATARINA, BRASIL
2008; SAREM; Volume: 15; Issue: 1 Linguagem: Inglês
ISSN
1666-0536
AutoresMariel Bazzalo, Paulo A. C. Flores, Mariana G. Pereira,
Tópico(s)Ichthyology and Marine Biology
ResumoHabitat use and behavior of the marine tucuxi or Guyana dolphin in Baia Norte (Sotalia guianensis, Van Beneden, 1864), state of Santa Catarina, Brazil. During 2002 and 2003, the habitat use and behavior of Sotalia guianensis were studied using focal group observation and GIS at Baia Norte, southern Brazil, including a marine protected area (EPAA). The observation time (243:58h) was transformed in percentage and it was calculated a Coefficient of Area Use (AU) and in cells of 0.25 km2. Dolphins heteroge- neously used a 45.5 km 2 sector in the western coast of the bay (AUm= 0.01-0.598), with significant differences in use related to coastal and urban distance (p < 0.001), inside and outside the EPAA and among seasons (p < 0.0001). Although no significant differences were found in the AUm for depth, the largest surfaces used were found to be at less than 3 m. Dolphins used areas up to 4 km from shore and to 10 m deep, in and outside the EPAA and from 0.7 to 19.8 km to the urban zone. The highest used cells were lees than 1 km from the coast and far from the urban center. Feeding activity was dominant all
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