Factors determining number fluctuations and variation of the breeding success of an urban population of the Black-headed Gull Larus ridibundus [N-Poland]

@inproceedings{Indykiewicz2005FactorsDN,
  title={Factors determining number fluctuations and variation of the breeding success of an urban population of the Black-headed Gull Larus ridibundus [N-Poland]},
  author={Piotr Indykiewicz},
  year={2005}
}
o07’N, 18 o 03’E). The island has an area of 0.9 ha and in some parts there are 25-30 year old Pinus silvestris; the banks are overgrown by Phragmites communis, Typha latifolia and Salix sp., and the remaining part of the island is covered by grasses and perennial pants. During seven breeding seasons remarkable fluctuations in colony size were noted (from 1877 pairs in 2000 to 998 pairs in 2003). Most, i.e. 71% of females started breeding between the 15 th and 25 th of April. In subsequent… CONTINUE READING

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