Effect of culling yellow-legged gulls Larus michahellis on Audouin's gulls Larus audouinii nesting on AlborÃ¡n Island, Andalucê, Spain
This study is summarised as evidence for the following.
Control avian predators on islandsAction Link
Control avian predators on islands
A before-and-after study on Alborán Island (7 ha), southern Spain (Paracuellos & Nevado 2010), found that the population of Audouin’s gulls Larus audouinii increased from an average of 181 pairs in 1997-2000 to 626 pairs in 2009, following the control of yellow-legged gulls Larus michahellis from 2000 to 2009. Reproductive success also increased, from 0.3 chicks/pair in 1997-2000 to 0.25-0.9 chicks/pair in 2000-9. On average 106 adult yellow-legged gulls were culled each year, approximately 25% of the breeding population. Combined with the destruction of all eggs found, this reduced the population of gulls from 320-440 pairs in 1997-2000 to approximately 100 pairs in 2009.