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Abstract:

Gut contents of Pseudechinus magellanicuscollected from different habitats from Buenos Aires to Ushuaia were analyzed. In mussel beds off the Province of Buenos Aires at 50 m depth, the most important food items were Mytilus edulis platensisspat. In communities without Mytilus, food preferences were barnacles, foraminifer-ans, polychaetes and algae. In beds of the mytilid Aulacomya atraat a depth of 5-10m, main food items were oyster shell fragments and different algae: Rodophyta (leafy algae), Ectocarpus sp., and other algae. In Ushuaia the sea urchins preyed on ostracods, foraminiferans and algae. Multidimensional scaling ordination analyses showed that the diet of P. magellanicusdepends mostly on the kind of inhabited substrate. Our data indicate that P. magellanicusfrom Argentina is omnivorous, consuming any available food resource: they capture drift algae with the aboral tube feet, graze on sessile algae, and prey on other animals. The results suggest that the species play an important role in the community structure of the circa-littoral beds of Mytilus edulis platensis, mainly through an intense predation on bivalve spat. © 2004 Taylor & Francis Group, LLC.

Registro:

Documento: Artículo
Título:Feeding of Pseudechinus magellanicus (Philippi, 1857) (Echinoidea: Temnopleuridae) in the SW Atlantic Coast (Argentina)
Autor:Penchaszadeh, P.E.; Bigatti, G.; Miloslavich, P.; Penchaszadeh, P.E.; Bigatti, G.; Miloslavich, P.
Filiación:Facultad de Ciencias Exactas y Naturales-UBA, Argentina
Museo Argentino de Ciencias Naturales, CONICET. Av. Angel Gallardo 470, Buenos Aires, Argentina
Departamento de Estudios Ambientales, Universidad Simón Bolívar, Apartado Postal 89000, Caracas, Venezuela
Palabras clave:Argentina; Diet; MDS; Pedicellaria; Sea urchin; diet; echinoderm; feeding; predation; Argentina; Atlantic Ocean; Atlantic Ocean (Southwest); South America; algae; Animalia; Aulacomya; Bivalvia; Cirripedia; Echinodermata; Echinoidea; Ectocarpus; Ectocarpus sp.; Foraminifera; Invertebrata; Mytilidae; Mytilus; Mytilus edulis; Ostracoda; Ostreidae; Polychaeta; Pseudechinus; Pseudechinus magellanicus; Temnopleuridae; Thoracica
Año:2004
Volumen:58
Número:2
Página de inicio:91
Página de fin:99
DOI: http://dx.doi.org/10.1080/00785326.2004.10410216
Título revista:Ophelia
Título revista abreviado:Ophelia
ISSN:00785326
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00785326_v58_n2_p91_Penchaszadeh

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Citas:

---------- APA ----------
Penchaszadeh, P.E., Bigatti, G., Miloslavich, P., Penchaszadeh, P.E., Bigatti, G. & Miloslavich, P. (2004) . Feeding of Pseudechinus magellanicus (Philippi, 1857) (Echinoidea: Temnopleuridae) in the SW Atlantic Coast (Argentina). Ophelia, 58(2), 91-99.
http://dx.doi.org/10.1080/00785326.2004.10410216
---------- CHICAGO ----------
Penchaszadeh, P.E., Bigatti, G., Miloslavich, P., Penchaszadeh, P.E., Bigatti, G., Miloslavich, P. "Feeding of Pseudechinus magellanicus (Philippi, 1857) (Echinoidea: Temnopleuridae) in the SW Atlantic Coast (Argentina)" . Ophelia 58, no. 2 (2004) : 91-99.
http://dx.doi.org/10.1080/00785326.2004.10410216
---------- MLA ----------
Penchaszadeh, P.E., Bigatti, G., Miloslavich, P., Penchaszadeh, P.E., Bigatti, G., Miloslavich, P. "Feeding of Pseudechinus magellanicus (Philippi, 1857) (Echinoidea: Temnopleuridae) in the SW Atlantic Coast (Argentina)" . Ophelia, vol. 58, no. 2, 2004, pp. 91-99.
http://dx.doi.org/10.1080/00785326.2004.10410216
---------- VANCOUVER ----------
Penchaszadeh, P.E., Bigatti, G., Miloslavich, P., Penchaszadeh, P.E., Bigatti, G., Miloslavich, P. Feeding of Pseudechinus magellanicus (Philippi, 1857) (Echinoidea: Temnopleuridae) in the SW Atlantic Coast (Argentina). Ophelia. 2004;58(2):91-99.
http://dx.doi.org/10.1080/00785326.2004.10410216