The early development of aggressive behavior and rapid growth of chicks in the black-headed gull (Larus ridibundus) in conditions of diffused nesting

摘要: The effect of low nesting density caused by the fragmentation biotopes due to seasonal flooding on development aggressive behavior and growth black-headed gull chicks was investigated. An analysis birds with different densities showed that contacts neighboring broods were less frequent in from more sparsely distributed nests, while could be observed these earlier often than their peers nests located densely populated areas. By testing parent using a standard stimulus territorial behavior—a remotely controlled stuffed gull—we found hosts widely spaced reacted aggressively but left clutches frequently neighbors nested densely. On average, grew faster daily increment skull size correlated inversely frequency parental visits. We suppose case decrease grounds, offspring young couples most areas had an advantage probably maternal influence composition eggs. According our data, conditions low-density nesting, prevailed over possible developing social experience.