Artículo

Denuncio, P.; Paso Viola, M.N.; Machovsky-Capuska, G.E.; Raubenheimer, D.; Blasina, G.; Machado, R.; Polizzi, P.; Gerpe, M.; Cappozzo, H.L.; Rodriguez, D.H. "Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the Franciscana dolphin" (2017) Journal of Sea Research. 129:70-79
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Abstract:

Disentangling the intricacies governing dietary breadth in wild predators is important for understanding their role in structuring ecological communities and provides critical information for the management and conservation of ecologically threatened species. Here we combined dietary analysis, nutritional composition analysis of prey, literature data and nutritional geometry (right-angled mixture triangle models -RMT-) to examine the diet of the most threatened small cetacean in the western South Atlantic Ocean, the Franciscana dolphin (Pontoporia blainvillei). We applied a recently developed extension of niche theory based on the RMT to help understand the dietary strategies of this species. Our results showed that across their range the Franciscanas consumed prey with variable protein-to-lipid energy ratios (LMM, p < 0.001). In an intensive study of one area, FMA IV, we found that dolphins sub-populations, which recent genetic evidence suggest should be differentiated into three management units, have diets with different protein energy and water mass compositions, but similar protein-to-lipid energy ratios. Furthermore, dolphins from the three areas mixed different combinations of prey in their diets to achieve the observed macronutrient ratios. These results suggest that the different habitats that each sub-population occupies (estuarine, north marine area and south marine) might be associated with different prey composition niches, but similar realized nutritional niches. Future priorities are to better comprehend possible geographical and long-term seasonal effects on prey consumption and dietary breadth of the different Franciscana populations to identify potential impacts (environmental and human-related), enhance the current management strategies to protect this endangered marine predator. © 2017 Elsevier B.V.

Registro:

Documento: Artículo
Título:Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the Franciscana dolphin
Autor:Denuncio, P.; Paso Viola, M.N.; Machovsky-Capuska, G.E.; Raubenheimer, D.; Blasina, G.; Machado, R.; Polizzi, P.; Gerpe, M.; Cappozzo, H.L.; Rodriguez, D.H.
Filiación:Instituto de Investigaciones Marinas y Costeras, Departamento de Ciencias Marinas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CONICET, Funes 3350, Mar del Plata, Argentina
Laboratorio de Ecología, Comportamiento y Mamíferos Marinos, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, CONICET, Angel Gallardo 470, Buenos Aires, Argentina
Charles Perkins Centre, Faculty of Veterinary Science, School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
Laboratorio de Vertebrados, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, Bahía Blanca, Argentina
Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS). Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves n° 9500, Porto Alegre, Brazil
Palabras clave:Cetaceans; Diet; Macronutrient composition; Nutritional geometry; Pontoporia blainvillei; biochemical composition; cetacean; conservation management; conservation status; diet; dolphin; endangered species; geometry; predator; species conservation; subpopulation; Atlantic Ocean; Atlantic Ocean (South); Cetacea; Pontoporia blainvillei
Año:2017
Volumen:129
Página de inicio:70
Página de fin:79
DOI: http://dx.doi.org/10.1016/j.seares.2017.05.008
Título revista:Journal of Sea Research
Título revista abreviado:J. Sea Res.
ISSN:13851101
CODEN:JSREF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13851101_v129_n_p70_Denuncio

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Citas:

---------- APA ----------
Denuncio, P., Paso Viola, M.N., Machovsky-Capuska, G.E., Raubenheimer, D., Blasina, G., Machado, R., Polizzi, P.,..., Rodriguez, D.H. (2017) . Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the Franciscana dolphin. Journal of Sea Research, 129, 70-79.
http://dx.doi.org/10.1016/j.seares.2017.05.008
---------- CHICAGO ----------
Denuncio, P., Paso Viola, M.N., Machovsky-Capuska, G.E., Raubenheimer, D., Blasina, G., Machado, R., et al. "Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the Franciscana dolphin" . Journal of Sea Research 129 (2017) : 70-79.
http://dx.doi.org/10.1016/j.seares.2017.05.008
---------- MLA ----------
Denuncio, P., Paso Viola, M.N., Machovsky-Capuska, G.E., Raubenheimer, D., Blasina, G., Machado, R., et al. "Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the Franciscana dolphin" . Journal of Sea Research, vol. 129, 2017, pp. 70-79.
http://dx.doi.org/10.1016/j.seares.2017.05.008
---------- VANCOUVER ----------
Denuncio, P., Paso Viola, M.N., Machovsky-Capuska, G.E., Raubenheimer, D., Blasina, G., Machado, R., et al. Population variance in prey, diets and their macronutrient composition in an endangered marine predator, the Franciscana dolphin. J. Sea Res. 2017;129:70-79.
http://dx.doi.org/10.1016/j.seares.2017.05.008