INVESTIGADORES
GIBERTO Diego Agustin
artículos
Título:
Feeding ecology of Bathyraja macloviana (Rajidae): a polychaete-feeding skate from the South-west Atlantic
Autor/es:
MABRAGAÑA, E.; GIBERTO, D.A.; BREMEC, C.S.
Revista:
SCIENTIA MARINA
Editorial:
Institut de Ciències del Mar de Barcelona
Referencias:
Lugar: Barcelona; Año: 2005 vol. 69 p. 405 - 413
ISSN:
0214-8358
Resumen:
The present paper analyzes the diet, feeding strategy and niche width of B. macloviana in a sector of the Argentinean Continental Shelf (ACS).  Individuals (n = 147) were collected from 33 sampling stations during late summer and autumn 2001. Twenty nine alimentary items in the gut contents were found, with a clear dominance of polychaetes. Crustaceans were secondary alimentary items. The polychaete Travisia kerguelensis was the main food item ingested, followed by Nepthyidae, Sabellidae and Lumbrineriidae, while Gammaridae and Cirolanidae were the main items among crustaceans. Gut contents from autumn sampling contained parasites of the genus Otodistomum. The niche width and feeding strategy displayed by B. macloviana support the specialization towards polychaetes throughout this study. Slow motile and infaunal species constitute major preys. The results suggest that this skate actively selects worms, reflecting, in some sense, the composition of the polychaete assemblage, and allowing a low dietary overlap with other sympatrically skates of the ACS.