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Abstract:

The feeding ecology of Mustelus schmitti was studied based on analysis of stomach contents of 525 specimens collected from three research cruises carried out during October 2008 to March 2009 on the Argentinean continental shelf (34 o45′S-41 oS). Generalized Linear Models were used to test the effects of Geographic location, Total Length, Sex and Maturity stage on the diet. The most commonly occurring major prey groups differed between Geographic locations. In Río de la Plata (RLP) deep M. schmitti feed on Crustaceans, Fish and Polychaetes, whereas Crustaceans, Polychaetes and Fishes were the main prey in RLP coast, Rincón (RIN) coast and RIN deep, respectively. Moreover, models showed dietary shift related to total length in each Geographic location. In coastal nursery areas Polychaetes decreased and Fishes increased in importance as M. schmitti grew in size; while Crustaceans increased in importance from small to medium size, and then decreased in the large specimens. Deeper areas also show dietary changes related to growth. The trophic level of M. schmitti showed lower values in coastal Geographic locations (3. 48-3. 53) than in deeper Geographic locations (3. 56-3. 77). The higher trophic role in deeper communities could be related to the size of M. schmitti which increases with depth. Finally, total vacuity index was 2. 47 (the lowest in the literature) indicating an intense and continuous feeding activity of the species. © 2011 Springer Science+Business Media B.V.

Registro:

Documento: Artículo
Título:The feeding ecology of Mustelus schmitti in the southwestern Atlantic: Geographic variations and dietary shifts
Autor:Belleggia, M.; Figueroa, D.E.; Sánchez, F.; Bremec, C.
Filiación:Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo Victoria Ocampo N1, Mar del Plata, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Buenos Aires, Argentina
Laboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP), Funes 3350, Mar del Plata, Argentina
Idioma: Inglés
Palabras clave:Diet; Gatuzo; Models; Narrownose smoothhound; Nursery habitat; Ontogenetic changes; continental shelf; dietary shift; feeding ecology; geographical variation; marine ecosystem; nursery ground; ontogeny; shark; spatiotemporal analysis; stomach content; trophic level; Atlantic Ocean; Atlantic Ocean (Southwest); Crustacea; Mustelus schmitti; Pisces; Polychaeta
Año:2012
Volumen:95
Número:1
Página de inicio:99
Página de fin:114
DOI: http://dx.doi.org/10.1007/s10641-011-9874-3
Título revista:Environmental Biology of Fishes
Título revista abreviado:Environ. Biol. Fishes
ISSN:03781909
CODEN:EBFID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03781909_v95_n1_p99_Belleggia

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Citas:

---------- APA ----------
Belleggia, M., Figueroa, D.E., Sánchez, F. & Bremec, C. (2012) . The feeding ecology of Mustelus schmitti in the southwestern Atlantic: Geographic variations and dietary shifts. Environmental Biology of Fishes, 95(1), 99-114.
http://dx.doi.org/10.1007/s10641-011-9874-3
---------- CHICAGO ----------
Belleggia, M., Figueroa, D.E., Sánchez, F., Bremec, C. "The feeding ecology of Mustelus schmitti in the southwestern Atlantic: Geographic variations and dietary shifts" . Environmental Biology of Fishes 95, no. 1 (2012) : 99-114.
http://dx.doi.org/10.1007/s10641-011-9874-3
---------- MLA ----------
Belleggia, M., Figueroa, D.E., Sánchez, F., Bremec, C. "The feeding ecology of Mustelus schmitti in the southwestern Atlantic: Geographic variations and dietary shifts" . Environmental Biology of Fishes, vol. 95, no. 1, 2012, pp. 99-114.
http://dx.doi.org/10.1007/s10641-011-9874-3
---------- VANCOUVER ----------
Belleggia, M., Figueroa, D.E., Sánchez, F., Bremec, C. The feeding ecology of Mustelus schmitti in the southwestern Atlantic: Geographic variations and dietary shifts. Environ. Biol. Fishes. 2012;95(1):99-114.
http://dx.doi.org/10.1007/s10641-011-9874-3