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Onchidoris fusca (Müller); A Predator of Barnacles

H. Barnes and H. T. Powell
Journal of Animal Ecology
Vol. 23, No. 2 (Nov., 1954), pp. 361-363
DOI: 10.2307/1986
Stable URL: http://www.jstor.org/stable/1986
Page Count: 4
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Onchidoris fusca (Müller); A Predator of Barnacles
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Abstract

The common inshore Nudibranch, Onchidoris fusca (Muller), has been observed feeding on barnacles, and the feeding behaviour and the extent of predation followed. The dorid effects entry by rupture and downward displacement of the operculum, and feeds only on the soft parts of the barnacle. It is probable that ingestion takes place largely by suction, involving the action of the buccal crop, the presence of which in this and certain other dorids is associated with a much reduced radula. The possibility that the diet of O. fusca is restricted to barnacles is considered.

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