Boplatsval och kläckningsframgång hos mindre strandpipare Charadrius dubius vid Rigabuktens stränder

Abstract

Nest site selection and hatching success of the Little Ringed Plover Charadrius dubius was studied on two sections of sand beaches in the Gulf of Riga (West coast and East coast), Latvia, in 1995—1996. The distance from each nest to the sea and to the forest, as well as nest success, was recorded. The measured distances differed significantly between each other only on the East coast in 1996, when the distance to the sea was larger. Survival rates were not lower for nests located closer to the sea or to the forest than in central parts of the beach. Hence, no edge effects on nest success were apparent. Still, Little Ringed Plovers seemed to avoid both edges to an equal degree, apart from at the East coast where they faced more strong onshore winds. The wind may force plovers to place nests on the lee-side of foredunes, closer to the forest, and thus break up the balanced position of nests in relation to habitat edges.