Residence patterns and site fidelity in bottlenose dolphins, Tursiops truncatus (Montagu) (Cetacea, Delphinidae) off Southern Brazil
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Residence patterns, habitat use, range, and some population estimate of the coastal bottlenose dolphin were documented in two coastal sites in southern Brazil: Laguna and Imbe/Tramandai.Abstract:
Residence patterns, habitat use, range, and some population estimate of the coastal bottlenose dolphin, Tursiops truncatus (Montagu, 1821), were documented in two coastal sites in southern Brazil: Laguna (Santa Catarina) (28o30'S; 48o55'W), and Imbe/Tramandai (Rio Grande do Sul) (29o58'S; 50o07'W). Regular observations were carried out at the Laguna system for 27 months (August 1989 to December 1991). The dolphins were photo-identified using natural permanent marks. Over 4,500 photograps were taken from shore grounds 6 to 14 meters away. Up to 51 dolphins have used the estuaries of Laguna's canal and Imarui-Santo Antonio's lagoon system in 1991. A stable group of nine animals has inhabited the Imbe/Tramandai area for over 13 years. Both sites were considered distinctive geographical communities, with 5.7% interchange within their individuals. In Laguna 88.5% of the individuals were resident and the rest were nonresident. Four cases of movement along the coastline were followed and females were more resident than males.read more
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References
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Book ChapterDOI
The Social Structure of Free-Ranging Bottlenose Dolphins
TL;DR: This chapter presents the results of one study of the social structure of the bottlenose dolphin, Tursiops truncatus, and finds predictable patterns of organization which provide insights into the adaptive significance of thesocial systems of cetacean societies.
Journal ArticleDOI
Ecology, behavior and social organization of the bottlenose dolphin: a review
TL;DR: Most bottlenose dolphins studied to date have had definable home ranges, and behavioral, morphological and biochemical information indicates discrete stocks in some areas, but dolphins appear to form relatively permanent social groups based on sex and age.
Journal ArticleDOI
The Photographic Determination of Group Size, Composition, and Stability of Coastal Porpoises (Tursiops truncatus)
Bernd Würsig,Melany Würsig +1 more
TL;DR: During a 21-month study, 53 individual bottle-nosed porpoises were recognized by photographs of their dorsal fins by a stable core of five animals plus other individuals that varied greatly from sighting to sighting.
Movements and activities of the atlantic bottlenose dolphin, tursiops truncatus, near sarasota, florida
TL;DR: A tagging-observation program was conducted to study the behavioral ecology of Atlantic bottlenose dolphins near Sarasota, Florida, and found that social organization was characterized by small dynamic groups that appeared to be subunits of a larger socially interacting herd.
Journal ArticleDOI
Social ecology of bottlenose dolphins in the kvarnerić (northern adriatic sea)
TL;DR: A bottlenose dolphin community was studied from small inflatable craft from 1987 to 1994 in a relatively large area (about 800 km2) east of the islands of Loˇsinj and Cres, northern Adriatic Sea as discussed by the authors.