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

  • Clive R. McMahon (a1) (a2), Harry R. Burton (a1) and Marthán N. Bester (a2)

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.

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

  • Clive R. McMahon (a1) (a2), Harry R. Burton (a1) and Marthán N. Bester (a2)

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