Does use of a tape lure bias samples of Curlew sandpipers captured with mist nets

Abstract

[ENG] Bias produced by the use of conspecific tape recordings (tape lures) to attract migrating Curlew Sandpipers (Calidris Jerruginea) to mist nets was assessed. Samples netted with and without tape lures did not differ in age, sex composition, body size or estimated staging time. Tape-lured birds, however, weighed less than those captured without tape lures, although the difference was only significant for females. Potential sources of bias should be considered when analyzing samples obtained in different ways.