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handle: 10261/44581
[ES ] Se analiza el sesgo que el uso de grabaciones puede introducir en la captura de individuos de Calidris Jèrruginea con redes. No se detectó ningün efecto en la composición de edades y sexos en las muestras. Tampoeo se hallô ningün efeeto en diversas medidas del tamaño corporal ni en ci estimado del periodo de estancia. Sin embargo, las ayes capturadas con Ia ayuda de grabaciones pesaban menos que las demas, aunque las difereneias mayores se detectaron en hembras. Este sesgo producido por el uso de grabaciones debe ser tomado en cuenta al analizar informaciôn procedente de muestras obtenidas con diferentes métodos.
[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.
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