INVESTIGADORES
COLAUTTI Dario Cesar
artículos
Título:
Alimentación de Pterodoras granulosus (Valenciennes) Pisces Doradide en la cuenca baja del Plata
Autor/es:
FERRIZ, R. A.; VILLAR, C.; COLAUTTI, D. C.; BONETTO, C.
Revista:
Revista del Museo Argentino de Ciencias Naturales
Editorial:
Museo Argentino de Ciencias Naturales
Referencias:
Año: 2000 vol. 2 p. 51 - 56
ISSN:
1514-5158
Resumen:
Feeding habits of Pterodoras granulosus (Valenciennes) (Pisces, Doradidae) in the lower del Plata Basin. The feeding biology of Pterodoras granulusus (armored catfish) was studied in an extensive area from comprising two environments of different characteristics, a typical lotic system. the LowerParana River, and a transitional environment towards an estuarian system on the nght margin of the Rio de la Plata. The importance of the different feeding items observed in the stomach content of P. granulosus represented the relative abundance of them in the environment. Therefore, P. granulosus appeared as a bentophagous, strongly eurriphagic and hardly selective organism consuming vegetation and molluscs, with little selectivity, its diet being dominated by vegetation in the Lower Parana River and molluscs on the right margin of the Rio de la Plata. The molluscs Corbicula flurninea and Lininoperna fortunei showed a high percentage of occurrence ?in all sampling sites. 'f he eventual importance of the feeding habits of P. granulosus on the population density of C. fluminea and L. fortunei is discussed.