| TAZ-TFG-2020-3417 |
Dinámica temporal de la expresión de caracteres sexuales secundarios en hembras de Papamoscas cerrojillo (Ficedula hypoleuca)
Molinero Aylagas, Sara
Martínez Padilla, Jesús (dir.)
Nicolau Ibarra, José Manuel (ponente)
Universidad de Zaragoza,
EPSHUES,
2020
Ciencias Agrarias y del Medio Natural department, Ecología area
Graduado en Ciencias Ambientales
Tipo de Trabajo Académico: Trabajo Fin de Grado
Notas: This study is about the Pied flycatcher (Ficedula hypoleuca). It is a bird of about 12cm in length and weighs about 13 g, it spends summers in North Africa and Europe and winters in Africa (it is a migratory bird). It has a white spot on the forehead distinctive of the species, which in males is considered as a sexual character, but in females its functionality is unknown. This study was carried out from 1993 to 2017 in La Hiruela (Madrid) in two different habitats separated 1.1 km respectively, and it aims to find a temporal pattern of the white spot expression in female Pied flycatchers in the last 30 years. The results obtained suggest a negative quadratic pattern in which the female's spot decreases from 1993 to 2009 but then grows again from 2009 to 2017. These results could be explained by differences in population density and perhaps by population structure. Over the last few years, the density of breeding pairs has increased, creating a more competitive environment in which only the females with the largest spot are the most competitive and manage to breed in nest boxes. Immigration-emigration rates or the age structure in the population could be possible explanatory mechanisms of the results. Alternative hypotheses such as phenotypic plasticity are also potential candidates.
Notas: This study is about the Pied flycatcher (Ficedula hypoleuca). It is a bird of about 12cm in length and weighs about 13 g, it spends summers in North Africa and Europe and winters in Africa (it is a migratory bird). It has a white spot on the forehead distinctive of the species, which in males is considered as a sexual character, but in females its functionality is unknown. This study was carried out from 1993 to 2017 in La Hiruela (Madrid) in two different habitats separated 1.1 km respectively, and it aims to find a temporal pattern of the white spot expression in female Pied flycatchers in the last 30 years. The results obtained suggest a negative quadratic pattern in which the female's spot decreases from 1993 to 2009 but then grows again from 2009 to 2017. These results could be explained by differences in population density and perhaps by population structure. Over the last few years, the density of breeding pairs has increased, creating a more competitive environment in which only the females with the largest spot are the most competitive and manage to breed in nest boxes. Immigration-emigration rates or the age structure in the population could be possible explanatory mechanisms of the results. Alternative hypotheses such as phenotypic plasticity are also potential candidates.
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trabajos-academicos-universidad-zaragoza > centro > escuela-politecnica-superior-huesca
trabajos-academicos-universidad-zaragoza > trabajos-fin-grado