Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica

Detalles Bibliográficos
Autores principales: Acevedo, Alejandro, Burkhart, Stephanie
Formato: Online
Idioma:eng
Publicado: Universidad de Costa Rica 1998
Acceso en línea:https://revistas.ucr.ac.cr/index.php/rbt/article/view/29648
id RBT29648
record_format ojs
spelling RBT296482022-10-04T16:14:14Z Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica Acevedo, Alejandro Burkhart, Stephanie Golfo Dulce Costa Rica Tursiops truncatus Stenella attenuata distribution There are no detailed studies on the sympatric dolphin species of Golfo Dulce, Studies in other areas have indicated that the presence of sympatric dolph ins is maintained by each species using different habitats. This study describes the distribution of bottle nose (Tursiops truncatus) and pan-tropical spoiled (Stenella allenuata) dolphins in Golfo Dulce and its relation to habitat. A total of 428 boat surveys were conducted from September 1991 through December 1992. There were 529 bottlenose dolphin sightings and 200 spotted dolphins sightings. The two species were only once observed in mixed aggregations. There were differences in relative abundance and group size between both dolphin species. Bottlenose dolphins were found mostly in shallow waters, close to shore, near rivers. and along steep marine slopes. Spotted dolphins were associated with deeper waters and increased distance from shore. Despite apparent differences in habitat preferences. the two dolphin species were commonly observed in tile same areas, albeit at different times, due in part to seasonal variations in dolphin distribution and habitat preference. Most notably during the Late Wet season of 1991 bottlenose dolphins were found in the middle and spotted dolphins at both ends of the Gulf. This pattern was almost reversed during the Late Wet season of 1992. The observed seasonal variation patterns are inadequately explained by habitat-preference arguments alone. Universidad de Costa Rica 1998-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/29648 Revista de Biología Tropical; Vol. 46 No. S6 (1998): Volume 46 – Supplement 6 – December 1998: Aquatic ecosystems of Costa Rica; 91–101 Revista de Biología Tropical; Vol. 46 Núm. S6 (1998): Volumen 46 – Suplemento 6 – Diciembre 1998: Ecosistemas acuáticos de Costa Rica; 91–101 Revista Biología Tropical; Vol. 46 N.º S6 (1998): Volume 46 – Supplement 6 – December 1998: Aquatic ecosystems of Costa Rica; 91–101 2215-2075 0034-7744 10.15517/rbt.v46i6 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/29648/29630 Copyright (c) 1998 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution Universidad de Costa Rica
collection Revista de Biología Tropical
language eng
format Online
author Acevedo, Alejandro
Burkhart, Stephanie
spellingShingle Acevedo, Alejandro
Burkhart, Stephanie
Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica
author_facet Acevedo, Alejandro
Burkhart, Stephanie
author_sort Acevedo, Alejandro
title Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica
title_short Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica
title_full Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica
title_fullStr Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica
title_full_unstemmed Seasonal distribution of bottlenose (Tursiops truncatus) and pan-tropical spotted (Stenella attenuata) dolphins (Cetacea: Delphinidae) in Golfo Dulce, Costa Rica
title_sort seasonal distribution of bottlenose (tursiops truncatus) and pan-tropical spotted (stenella attenuata) dolphins (cetacea: delphinidae) in golfo dulce, costa rica
publisher Universidad de Costa Rica
publishDate 1998
url https://revistas.ucr.ac.cr/index.php/rbt/article/view/29648
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AT burkhartstephanie seasonaldistributionofbottlenosetursiopstruncatusandpantropicalspottedstenellaattenuatadolphinscetaceadelphinidaeingolfodulcecostarica
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