Artículo

Garaffo, G.V.; Dans, S.L.; Crespo, E.A.; Degrati, M.; Giudici, P.; Gagliardini, D.A. "Dusky dolphin: Modeling habitat selection" (2010) Journal of Mammalogy. 91(1):54-65
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Abstract:

The use of habitat selection models to predict the likely occurrence of wild populations is an important tool in conservation planning and wildlife management. The goal of our study was to build habitat selection models for the dusky dolphin (Lagenorhynchus obscurus) in Golfo Nuevo, Argentina. Random transects were surveyed by boat in 20022007. A grid of 1.5 × 1.5-km squares (cells) was constructed for the study area. We characterized each cell by depth, slope, distance from shore, sea-surface temperature, concentration of chlorophyll a, presenceabsence of dolphins, and a coefficient of use by dusky dolphins. Models were developed for warm and cold seasons and for all data combined. Data collected during 20022005 were pooled to develop the model, and data collected during 20062007 were used for cross-validation. Logistic regression with a binomial error structure and a logit-link function were used to relate the presence of dolphins to habitat variables. Models with gamma structure and log-link function were used to relate area use to habitat variables. Models were selected with deviance analysis and Akaike's information criterion. All predictor variables significantly influenced distribution of dolphins, which preferred steep areas at depths of 5060 m, distance from shore of 35 km, and higher values of chlorophyll. In the warm season dolphins preferred colder waters and avoided deeper and warmer areas. Dusky dolphins in Golfo Nuevo are exploited as a tourism resource, and selected models should be considered when deciding the impact of dolphin-watching activities on management. © 2010 American Society of Mammalogists.

Registro:

Documento: Artículo
Título:Dusky dolphin: Modeling habitat selection
Autor:Garaffo, G.V.; Dans, S.L.; Crespo, E.A.; Degrati, M.; Giudici, P.; Gagliardini, D.A.
Filiación:Centro Nacional Patagnico, Boulevard Brown 2825 (9120) Puerto Madryn, Chubut, Argentina
Universidad Nacional de la Patagonia, Facultad de Ciencias Naturales, Boulevard Brown 3700 (9120) Puerto Madryn, Chubut, Argentina
Instituto de Astronoma y Fsica Del Espacio, Ciudad Universitaria, Avenida Intendente Giraldes s/n, Ciudad de Buenos Aires, Argentina
Palabras clave:Distribution modeling; Dusky dolphin; Generalized linear model; Habitat selection; Lagenorhynchus obscurus; Logistic regression; conservation management; conservation status; dolphin; field survey; habitat selection; linearity; population distribution; regression analysis; tourism market; Argentina; Chubut; Golfo Nuevo; Lagenorhynchus obscurus
Año:2010
Volumen:91
Número:1
Página de inicio:54
Página de fin:65
DOI: http://dx.doi.org/10.1644/09-MAMM-A-105R1.1.
Título revista:Journal of Mammalogy
Título revista abreviado:J. Mammal.
ISSN:00222372
CODEN:JOMAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222372_v91_n1_p54_Garaffo

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Citas:

---------- APA ----------
Garaffo, G.V., Dans, S.L., Crespo, E.A., Degrati, M., Giudici, P. & Gagliardini, D.A. (2010) . Dusky dolphin: Modeling habitat selection. Journal of Mammalogy, 91(1), 54-65.
http://dx.doi.org/10.1644/09-MAMM-A-105R1.1.
---------- CHICAGO ----------
Garaffo, G.V., Dans, S.L., Crespo, E.A., Degrati, M., Giudici, P., Gagliardini, D.A. "Dusky dolphin: Modeling habitat selection" . Journal of Mammalogy 91, no. 1 (2010) : 54-65.
http://dx.doi.org/10.1644/09-MAMM-A-105R1.1.
---------- MLA ----------
Garaffo, G.V., Dans, S.L., Crespo, E.A., Degrati, M., Giudici, P., Gagliardini, D.A. "Dusky dolphin: Modeling habitat selection" . Journal of Mammalogy, vol. 91, no. 1, 2010, pp. 54-65.
http://dx.doi.org/10.1644/09-MAMM-A-105R1.1.
---------- VANCOUVER ----------
Garaffo, G.V., Dans, S.L., Crespo, E.A., Degrati, M., Giudici, P., Gagliardini, D.A. Dusky dolphin: Modeling habitat selection. J. Mammal. 2010;91(1):54-65.
http://dx.doi.org/10.1644/09-MAMM-A-105R1.1.