Limited effects of egg size on chick growth in the chinstrap Penguin Pygoscelis antarctica |
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| Authors: | J Belliure L M Carrascal E Minguez M Ferrer |
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| Institution: | Museo Nacional de Ciencias Naturales-CSIC, J.Gutiérrez Abascal 2, E-28006 Madrid, Spain e-mail: mcnc152@fresno.csic.es, ES
Estación Biológica de Do?ana-CSIC, Paseo María Luisa S.N., E-41013 Sevilla, Spain, ES
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| Abstract: | We studied the effect of egg size on chick growth in the chinstrap penguin under natural non-manipulative, conditions. The
influence of egg size on chick mass at hatching, 15 and 45 days of age was analysed controlling for the effect of hatching
date, as hatching date has been repeatedly associated with chick growth in this species. Egg volume explained 20% of the variation
in the body mass of chicks at hatching. Its effect disappeared as chicks grew, being statistically not significant at the
age of 15 and 45 days. Egg volume asymmetry also had no role in determining chicks' growth asymmetries.
Accepted: 6 June 1998 |
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