Lifetime reproductive success of Greylag Geese Anser anser breeding in south Sweden

Authors

  • Leif Nilsson
  • Hakon Kampe-Persson

DOI:

https://doi.org/10.34080/os.v28.19522

Abstract

During 1984–2009, 664 adults and 1,944 goslings of Greylag Geese Anser anser were neck-banded in south-west Scania, Sweden. After hatching the area was carefully searched for marked geese, giving more than 100,000 re-sightings. Of those marked as goslings 71% survived the first year, 52% the second year, and the oldest bird recorded was 25 years. About 50% of the survivors were recruited into the breeding population when two to three years old. Of 1,187 geese that survived for at least two years, 25% produced at least one brood of small young, and 18% at least one fledged young. The maximum life-time number of broods with fledged young was nine, but 50% of the geese known to have bred successfully produced only one brood of fledged young. Ten percent of the geese seen with small goslings produced 47% of all fledged young. The maximum number of fledged young for a goose of known age was 32 (age 15 years), but two geese marked as adults and followed for 16 and 17 years produced 40 fledglings each.

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Published

2018-01-01

How to Cite

Nilsson, L., & Kampe-Persson, H. (2018). Lifetime reproductive success of Greylag Geese Anser anser breeding in south Sweden. Ornis Svecica, 28(1), 39–47. https://doi.org/10.34080/os.v28.19522

Issue

Section

Research Papers