| Publication Type: | Journal Article |
| Year of Publication: | 1993 |
| Authors: | Hannon, SJ, Martin, K, THOMAS, LEN, SCHIECK, JIM |
| Journal: | Journal of Field Ornithology |
| Volume: | 64 |
| Issue: | 4 |
| Date Published: | 1993 |
| ISBN Number: | 02738570 |
| Keywords: | Lagopus, Lagopus lagopus, Lagopus muta, Lagopus mutus, Phasianidae |
| Abstract: | The possible effect of investigator disturbance on clutch predation in two populations of Willow Ptarmigan (Lagopus lagopus) was investigated using three different techniques. No significant difference was found in (1) the proportion of hens that succeeded in producing broods for hens whose nests were found vs. those that were not located, (2) proportion of broodless hens on an intensively studied area vs. an area that was not studied, (3) the proximity of nest flags for successful vs. depredated nests. A new technique was developed to compare rates of visits and types of nest checks between successful and depredated nests. This method controlled for period under observation and stage of breeding. Methods for minimizing investigator disturbance are discussed. /// Utilizando tres técnicas diferentes se estudió, en dos poblaciones de Lagopus lagopus, el posible efecto del disturbio causado por el investigador en la depredación de camadas. No se encontró diferencia significativa en (1) la proporción de hembras exitosas en producir polluelos (al compararse aquellas cuyos nidos fueron localizados vs. aquéllas cuyos nidos no fueron localizados), (2) proporción de hembras sin camadas en un área de estudio intensiva vs. áreas que no fueron estudiadas, y (3) la proximidad de banderolas a de nidos (entre nidos exitosos vs. nidos depredados). Una nueva técnica fue desarrollada para comparar el efecto de la tasa de visitas y tipos de examen a nidos entre nidos exitosos y depredados. Este método puede ser regulado para períodos de observación y etapas reproductivas. Se discuten métodos para minimizar el disturbio causado por los investigadores. |
| URL: | http://www.jstor.org/stable/4513871 |
| Short Title: | Journal of Field Ornithology |
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