Occupation pattern of a harbor inlet by the estuarine dolphin, Sotalia guianensis (P. J. Van Bénéden, 1864) (Cetacea, Delphinidae)

Brazilian Archives of Biology and Technology

Marta Jussara Cremer²  Paulo César Simões-lopes¹  José Salatiel Rodrigues Pires² 

[1] ,Universidade Federal de São Carlos Laboratório de Análise e Planejamento Ambiental Departamento de HidrobiologiaSão Carlos SP ,Brasil

关键词: Sotalia guianensis;    occupation index;    Babitonga bay;    harbor use;    behavior;   

DOI  :  10.1590/S1516-89132009000300029

来源: SciELO

【 摘 要 】

The occupation pattern of Sotalia guianensis in São Francisco do Sul harbor inlet, in Babitonga bay, southern Brazil, was studied between September 1996 and June 1998. A total of 200 h of naturalistic observations and 141.2 h of estuarine dolphin systematic observations were made using binoculars 7 x 50. At each three minutes interval, data about number of individuals and behavior were registered. The population used the harbor inlet intensively, mainly for fishing activities. Ebb tide was responsible for a higher occupation index. Considering the months analyzed, the higher occupation index occurred in May, and in January the lower occurrence was observed. The mean group size was four individuals.

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