Weaning mass and the future survival of juvenile southern elephant seals, Mirounga leonina, at Macquarie Island

Author:

McMahon Clive R.,Burton Harry R.,Bester Marthán N.

Abstract

Seals that survived their first year were on average 2% and 4% heavier at birth and at weaning than the “non-survivors”. First year survival rates calculated for weaners over 135 kg weaning masses showed these weaners had higher survival rates than those less than 95 kg at weaning (71.55% and 54.15% respectively). Heavy weaners had greater fat reserves than light weaners and gained relatively more mass during lactation. Size, and therefore condition at weaning, influences first year survival.

Publisher

Cambridge University Press (CUP)

Subject

Geology,Ecology, Evolution, Behavior and Systematics,Oceanography

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