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Why should Greylag Goose Anser anser parents rear offspring of others?

Author:
  • Leif Nilsson
  • Hakon Kampe-Persson
Publishing year: 2003
Language: English
Pages: 25-37
Publication/Series: Wildfowl
Volume: 54
Document type: Journal article

Abstract english

The benefits and costs of rearing large broods were studied in a population
of neck collared Greylag Geese in Scania, southernmost Sweden. Families were divided into four groups according to brood size: 1-4, 5-8, 9-12 and >12 young. Gosling survival showed a significant positive relationship with brood size on arrival at the rearing area. First-year and third-year local survival, as well as breeding recruitment, showed a significant positive relationships with brood size at fledging. For adults rearing large broods, no costs were detected during the year following
that when they fledged >8 young; both survival rate and reproductive success exceeded the long-term averages.

Keywords

  • Zoology
  • Ecology

Other

Published
Leif Nilsson
E-mail: leif.nilsson [at] biol.lu.se

Professor emeritus

Biodiversity

+46 46 222 37 09

+46 70 525 57 09

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Sölvegatan 37, Lund

50

Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden