Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica

This study, conducted from June 1996 to July 1997, was directed at determining the abiotic environmental factors governing the distribution of the bottlenose dolphin (Tursiops truncatus) and the pan-tropical spotted dolphin (Stenella attenuata) in Golfo Dulce. The spotted dolphin was associated with...

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Autor principal:	Cubero-Pardo,Priscilla
Lenguaje:	English
Publicado:	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso 2007
Materias:	cetaceans environmental factors distribution patterns bottlenose dolphin spotted dolphin
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200002
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spelling	oai:scielo:S0717-717820070002000022008-01-31Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa RicaCubero-Pardo,Priscilla cetaceans environmental factors distribution patterns bottlenose dolphin spotted dolphin This study, conducted from June 1996 to July 1997, was directed at determining the abiotic environmental factors governing the distribution of the bottlenose dolphin (Tursiops truncatus) and the pan-tropical spotted dolphin (Stenella attenuata) in Golfo Dulce. The spotted dolphin was associated with significantly deeper zones (t-test = -9.761; p < 0.001, n = 202) and with higher salinity (t-test = -3.538; p = 0.001; n = 202) than the bottlenose dolphin. The combination of environmental variables in the distribution areas of each species in Golfo Dulce was different, both spatially (F = 9.724, df = 12; p < 0.001) and seasonally (F = 9.735; df = 12; p < 0.001). Of all the environmental variables considered, Multiple Discriminant Analysis showed depth to be the main factor differenciating the distribution areas of the two species. The relationship between group size in each species, depth, and the location of their distribution areas in relation to the shore were analyzed and evidence regarding these aspects and variations in foraging strategies and prey composition was proposed to explain the differences found in their spatial distributions. Seasonal variations in salinity in the distribution areas and their inverse relationship with the time of the year were analyzed in relation to their possible combined effects on prey composition during different seasons in order to explain the seasonal variations in distribution patternsinfo:eu-repo/semantics/openAccessEscuela de Ciencias del Mar. Pontificia Universidad Católica de ValparaísoInvestigaciones marinas v.35 n.2 20072007-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200002en10.4067/S0717-71782007000200002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	cetaceans environmental factors distribution patterns bottlenose dolphin spotted dolphin
spellingShingle	cetaceans environmental factors distribution patterns bottlenose dolphin spotted dolphin Cubero-Pardo,Priscilla Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica
description	This study, conducted from June 1996 to July 1997, was directed at determining the abiotic environmental factors governing the distribution of the bottlenose dolphin (Tursiops truncatus) and the pan-tropical spotted dolphin (Stenella attenuata) in Golfo Dulce. The spotted dolphin was associated with significantly deeper zones (t-test = -9.761; p < 0.001, n = 202) and with higher salinity (t-test = -3.538; p = 0.001; n = 202) than the bottlenose dolphin. The combination of environmental variables in the distribution areas of each species in Golfo Dulce was different, both spatially (F = 9.724, df = 12; p < 0.001) and seasonally (F = 9.735; df = 12; p < 0.001). Of all the environmental variables considered, Multiple Discriminant Analysis showed depth to be the main factor differenciating the distribution areas of the two species. The relationship between group size in each species, depth, and the location of their distribution areas in relation to the shore were analyzed and evidence regarding these aspects and variations in foraging strategies and prey composition was proposed to explain the differences found in their spatial distributions. Seasonal variations in salinity in the distribution areas and their inverse relationship with the time of the year were analyzed in relation to their possible combined effects on prey composition during different seasons in order to explain the seasonal variations in distribution patterns
author	Cubero-Pardo,Priscilla
author_facet	Cubero-Pardo,Priscilla
author_sort	Cubero-Pardo,Priscilla
title	Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica
title_short	Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica
title_full	Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica
title_fullStr	Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica
title_full_unstemmed	Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica
title_sort	environmental factors governing the distribution of the bottlenose (tursiops truncatus) and the spotted dolphin (stenella attenuata) in golfo dulce, south pacific, off costa rica
publisher	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200002
work_keys_str_mv	AT cuberopardopriscilla environmentalfactorsgoverningthedistributionofthebottlenosetursiopstruncatusandthespotteddolphinstenellaattenuataingolfodulcesouthpacificoffcostarica
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Environmental factors governing the distribution of the bottlenose (Tursiops truncatus) and the spotted dolphin (Stenella attenuata) in Golfo Dulce, South Pacific, off Costa Rica

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