Return to the Isle of Puffins
Growth of young Guillemots Uria aalge after leaving the colony
Harris, M.P., Webb, A. & Tasker, M.L. (1991) Seabird 13:40-44
Summary
Young Guillemots were weighed at a colony and at sea in two years. Growth at sea was as rapid as growth at the colony. By late August, chicks and adults at sea were both much heavier than adults when they were at the colony. The chances of a chick surviving to return to the colony in a subsequent year is likely to be linked with some aspect of its at-sea development rather than to its weight when it leaves the colony.

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