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Food habits and feeding behavior of the cownose ray, Rhinoptera bonasus, in lower Chesapeake Bay






Estuaries, 83: 305-310

Food habits and feeding behavior of the cownose ray, Rhinoptera bonasus, in lower Chesapeake Bay

The most important food item of the cownose ray, Rhinoptera bonasus, in the Virginian tributaries of lower Chesapeake Bay is the soft shell clam, Mya arenaria. The Baltic macoma, Macoma balthica, ranks a distant second. Adult rays feed on deep burrowing mollusks, juveniles on shallow- or non-burrowing bivalves. Foraging schools of rays invade tidal flats during the flood tide. Stirring motions of the pectoral fins combined with suction from the expansive orobranchial chamber are probably used to excavate deep burrowing bivalves.

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Accession: 021054766

DOI: 10.2307/1351491



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