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Modified Transmitter Attachment Method for Adult Ducks (Un Método Modificado para Adherir Transmisores a Patos Adultos)

Pamela J. Pietz, David A. Brandt, Gary L. Krapu and Deborah A. Buhl
Journal of Field Ornithology
Vol. 66, No. 3 (Summer, 1995), pp. 408-417
Published by: Wiley on behalf of Association of Field Ornithologists
Stable URL: http://www.jstor.org/stable/4514038
Page Count: 10
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Modified Transmitter Attachment Method for Adult Ducks (Un Método Modificado para Adherir Transmisores a Patos Adultos)
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Abstract

The value of radio telemetry for waterfowl research depends on the availability of suitable methods of attaching transmitters. In previous studies, external transmitters attached to adult Mallards (Anas platyrhynchos) with sutures and glue did not stay on birds reliably. In an attempt to improve transmitter retention, a method of attachment was tested in which 4-g transmitters were attached mid-dorsally with sutures and with a stainless steel anchor-shaped wire inserted subcutaneously (anchor transmitters). Field tests indicated that all of 26 female Mallards and 63 of 65 female Gadwalls (Anas strepera) retained their anchor transmitters during 4369 bird-days of monitoring during nesting and brood rearing. Survival rates of females with anchor transmitters compared favorably with those reported from other studies. In this study, females with and without anchor transmitters did not differ with respect to survival rates of their ducklings. The anchor transmitter may be suitable for a variety of field studies on numerous species. /// El valor de la radio telemetría para la investigación de aves acuáticas depende de la disponibilidad de métodos apropiados para adherir los transmisores. En estudios previos, transmisores externos adheridos a Anas platyrhynchos adultos con suturas y pegamento no quedaban fijados confiablemente a los adultos. En un intento de mejorar la retención de transmisores, probamos transmisores de 4-g, adheridos a medio dorso con suturas o con un alambre de acero inoxidable en forma de ancla que se insertaron subcutáneamente (transmisores anclas). Pruebas de campo indican que todas las 26 hembras de Anas platyrhynchos y 63 de 65 hembras de Anas strepera retuvieron sus transmisores ancla durante 4369 días-ave de monitoreo durante el anidaje y la educación de la camada. Las tasas de supervivencia de hembras con transmisores ancla compararon favorablemente con las reportadas en otros estudios. En este estudio, hembras con o sin transmisores no difirieron con respecto a las tasas de supervivencia de sus crías. El transmisor ancla puede ser apropiado para una variedad de estudios de campo en numerosas especies.

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