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Measurements of the strength of an adult skua and the force required to drag an adelie penguin chick from a colony
Entry ID: K017_1968_1969_NZ_1

Abstract: How much force was necessary to drag struggling adelie penguin (Pygoscelis adeliae) chicks of different ages from a colony was measured by holding a chick in a harness as they tugged against a spring balance. How strong a skua is was also determined by measuring their strength as they jerked at meat held on the hook of a spring balance. It was found that live chicks could be dragged out with a force equal to about two thirds of their gross weight. Skuas can jerk with a force up to 1600 grams weight and sustain 1300 quite readily. These figures tally well with the forces theoretically needed by skuas to drag out a 2000 gram chicks, about the maximum size they have been seen to haul bodily from a colony.
Geographic Coverage
Spatial coordinates   
  N: -77.17   S: -77.17   E: 166.68   W: 166.68

Temporal Coverage
Start Date: 1968-10-20
Stop Date: 1969-01-28
ISO Topic Category
Data Set Progress
Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand Supplemental Info
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Creation and Review Dates
DIF Creation Date: 2009-03-10
Last DIF Revision Date: 2016-11-18

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