Kleptoparasitism in gulls Laridae at an urban and a coastal foraging environment: an assessment of ecological predictors
| Autor: | Benjamin Dickins, Yvan I. Russell, Robert Spencer, Thomas E. Dickins |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Kleptoparasitism Ecology 05 social sciences Foraging Biology 010603 evolutionary biology 01 natural sciences Population density Predation 0501 psychology and cognitive sciences 050102 behavioral science & comparative psychology Flock Ecology Evolution Behavior and Systematics Nature and Landscape Conservation |
| Zdroj: | Bird Study. 64:12-19 |
| ISSN: | 1944-6705 0006-3657 |
| DOI: | 10.1080/00063657.2016.1249821 |
| Popis: | Capsule: Kleptoparasitism in gulls occurred at a greater rate at an urban compared with a coastal site. Population density and prey size predicted the rate of kleptoparasitism at the urban site.Aims: To investigate and assess the ecological variables associated with kleptoparasitism among gulls at urban and rural sites.Methods: Field observations were conducted at Brancaster (coastal rural) and Billingsgate Market (urban) to examine differences in the rate of kleptoparasitism in mixed-species flocks of gulls. Four key variables (prey size, population density, season and species) were assessed as predictors of kleptoparasitism.Results: Generalized linear models revealed significant effects on kleptoparasitism rate of site, population density and prey size, and two-way interactions between these main terms. Population density and prey size differed significantly between sites, but population density appeared to predict the rate of kleptoparasitism.Conclusion: Kleptoparasitism may well aid invasion a... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|