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No evidence of sex-specific differences in choice or size of fish caught for chicks or self-feeding among Common Guillemots Uria aalge
Barrett, R.T., Bugge, J. & Pedersen, T. (2010) Seabird 23:7-13
Abstract
Despite slight but significant differences in size of male and female Common Guillemots (Uria aalge) and previously published sex differences in parental behaviour, foarging ranges and diving behaviour, no evidence of sex-specific differences in choice or size of fish caught for chicks or for self-feeding was found among adults caught in a North Norwegian colony.

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