Egg Size, Body Size, Locomotion, and Feeding Performance in Captive King Eider Ducklings

Author:

Anderson Vanessa R.1,Alisauskas Ray T.2

Affiliation:

1. Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2, Canada

2. Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2, Canada and Canadian Wildlife Service, Prairie and Northern Wildlife Research Center, 115 Perimeter Road, Saskatoon, SK S7N 0X4, Canada

Abstract

Abstract We studied the effect of egg volume and body size on swimming speed, endurance, and feeding rate in captive King Eider (Somateria spectabilis) ducklings in the Canadian arctic. Sprint speed, endurance, and feeding rate were positively related to egg size and body size. Large ducklings from large eggs performed better than small ducklings from small eggs. Ducklings that are more capable swimmers and have higher feeding rates may grow more quickly and be more effective at predator evasion. Thus, ducklings from large eggs may have a survival advantage over those from small eggs under conditions where predation and nutrition may constrain survival.

Publisher

Oxford University Press (OUP)

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

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4. Retention of web tags and plasticine-filled leg bands applied to day-old ducklings.;Blums;J. Wildl. Manage,1994

5. Habitat partitioning among sympatric wintering common eiders Somateria mollissima and king eiders Somateria spectabilis.;Bustnes;Ibis,1997

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