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 Marine tucuxi in Sepetiba Bay: Why do they form aggregations.

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Type of Resource: text

Genre: Electronic Thesis or Dissertation

Date Created: 2007

Date Issued: 2007

Publisher: Florida Atlantic University

Physical Form: pdf

Extent: 69 p.

Language(s): English

Abstract/Description: Between August 2005 and December 2006, 139 boat surveys were conducted inSepetiba Bay, Brazil to sample behavioral patterns and environmental parameters duringthe occurrence of marine tucuxi groups and aggregations. Aggregations were defined asseveral groups gathered in an area totaling more than 100 animals, usually engaged in aspecific behavior. A total of 65 aggregations (x=177) and 192 groups (x=18) wererecorded. Marine tucuxi groups and aggregations differed regarding behavioral activity,geographical location and age composition. Aggregations were temporal associations ofseveral marine tucuxi groups performing foraging/feeding activities probably in responseto prey species, abundance, and distribution. Aggregations were primarily located at theinterior of the Bay where local topography may aid dolphins in pursuing and herdingschools of prey. Presence of neonates and calves was highly correlated with aggregations,reflecting the potential importance aggregations have in the protection, developmentaland learning processes of younger animals.

Identifier: FA00000744 (IID)

Note(s): Includes bibliography.Thesis (M.S.)--Florida Atlantic University, 2007.

Held by: Florida Atlantic University Digital Library

Sublocation: Boca Raton, Fla.

Persistent Link to This Record:

Restrictions on Access: All rights reserved by the source institution

Owner Institution: FAU

Autor: Dias, Laura Aichinger, author Herzing, Denise Dr., Thesis advisor Charles E. Schmidt College of Science, Degree grantor



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