New Zealand Journal of Marine and Freshwater Research abstracts

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SEXING RED-BILLED GULLS FROM STANDARD MEASUREMENTS

J. A. Mills*

Department of Zoology, University of Canterbury, Christchurch, New Zealand

Abstract The standard body measurements of 165 freshly killed adult Red-billed Gulls (Larus novaehollandiae scopulinus) from breeding colonies on the Kaikoura Peninsula are presented. A discriminant function, calculated from bill length and depth at gonys measurements of sexed specimens, applied to captured gulls can correctly sex 90.1% of the gulls which fall within the range of overlap of male and female measurements.

N.Z. Journal of Marine and Freshwater Research 5 (2): 326-8
(Received for publication 15 March 1971)

PDF file of entire paper: medium quality (129K); (scanned from paper original: notes about this process)

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