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Surface feeding on cephalopods by procellariiform seabirds in the southern benguela region south africa



Surface feeding on cephalopods by procellariiform seabirds in the southern benguela region south africa



Journal of Zoology (London) 218(4): 549-564



Cephalopod beaks recovered from stomach samples taken from 14 seabird species in the southern Benguela region off Southern Africa and from species at Sub-Antarctic Marion Island, were identified as far as possible, counted and the lower rostral lengths (LRLs) measured. Dorsal mantle lengths (DMLs) and body masses of the cephalopods eaten were estimated. The results of analyses by percentage frequency of occurrence and numerical abundance are discussed with reference to present knowledge of the distribution of cephalopods eaten by seabirds in the areas studied. Division of the cephalopod component of seabird diets into species which float, and species which sink, after death indicated that the birds forage on dead or moribund cephalopods on the surface, rather than catching live bioluminescent cephalopods at night.

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Accession: 007847926

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