Instituto Boto Cinza Guiana dolphin distribution between 2005-2007 in Sepetiba Bay, Brazil

Leonardo Flach

doi:10.15468/a7ufyg

Instituto Boto Cinza Guiana dolphin distribution between 2005-2007 in Sepetiba Bay, Brazil

Citation

Flach, L. 2011. Instituto Boto Cinza Guiana dolphin distribution between 2005-2007 in Sepetiba Bay, Brazil. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/717) on yyyy-mm-dd. https://doi.org/10.15468/a7ufyg accessed via GBIF.org on 2024-12-14.

Description

Original provider: Projeto Boto Cinza Dataset credits: Projeto Boto Cinza Abstract: Between August 2005 and July 2007, 376 Guiana dolphin (Sotalia guianensis) encounters were documented in Sepetiba Bay. For the purpose of this study all dolphin sightings were classified as groups or aggregations. Groups (N = 268, x = 20, range = 1–90) consisted of dolphins in apparent association usually engaged in the same behaviour and moving in the same direction. Aggregations (N = 108, x = 204, range = 100–450) consisted of temporal association of numerous groups gathered in an area, totalling several hundred individuals usually engaged in the same behavior but not necessarily moving in the same direction. Guiana dolphin groups and aggregations differed significantly in behavioral activity, spatial and temporal distribution and age composition. Most aggregated dolphins were engaged in foraging/feeding activities and primarily located at the interior of the bay, and also, aggregations were more likely recorded during morning hours and had more neonates and calves present when compared to groups. The plotted global positioning system (GPS) records of aggregations formed two distinct clusters of distribution within the bay, indicating potential areas where conservation strategies could be implemented. Purpose: The objective of this study was to investigate the occurrence of Guiana dolphin aggregations regarding their seasonal, diel and spatial distributions; behavioral activities, age composition and the environmental parameters measured during their occurrence in Sepetiba Bay.

Purpose

The objective of this study was to investigate the occurrence of Guiana dolphin aggregations regarding their seasonal, diel and spatial distributions; behavioral activities, age composition and the environmental parameters measured during their occurrence in Sepetiba Bay.

Sampling Description

Study Extent

NA

Sampling

NA

Method steps

NA

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

Scientific names are based on the Integrated Taxonomic Information System (ITIS).

Sotalia guianensis
rank: species

Geographic Coverages

Oceans

Bibliographic Citations

Contacts

Leonardo Flach
originator
position: Primary contact
Projeto Boto Cinza, Instituto Boto Cinza
email: flachleo@hotmail.com
homepage: http://www.projetobotocinza.com.br

OBIS-SEAMAP
metadata author
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: http://seamap.env.duke.edu

OBIS-SEAMAP
distributor
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: http://seamap.env.duke.edu

Leonardo Flach
owner
position: Primary contact
Projeto Boto Cinza, Instituto Boto Cinza
email: flachleo@hotmail.com
homepage: http://www.projetobotocinza.com.br

Leonardo Flach
administrative point of contact
position: Primary contact
Projeto Boto Cinza, Instituto Boto Cinza
email: flachleo@hotmail.com
homepage: http://www.projetobotocinza.com.br