Migración e invernada diferencial del mosquitero común (Phylloscopus collybita) en una zona húmeda del levante ibérico.

作者: Miguel Tirado Bernat , Joan Castany i Alvaro

DOI:

关键词: Young maleSex ratioHumanitiesPopulationCartographyPre breedingYoung femaleAdult femaleGeographyAdult maleBotánica

摘要: Se estudio el comportamiento del mosquitero comun (Phylloscopus collybita) fuera de la epoca cria en Paraje Natural Prat Cabanes-Torreblanca. Observamos dos periodos paso separados por un periodo central. En postnupcial detectamos oleadas, primera las hembras fueron mas abundantes y velocidad fue mayor, mientras que segunda, proporcion machos se incremento notablemente redujo velocidad. La mediana adelanto 3 dias respecto a los machos. prenupcial observo patron paso: macho adulto – juvenil hembra adulta joven, tipica paseriformes con migracion diferencial, una marcada distancia 16 entre adultas describimos aqui vez. Durante invernada resultaron comunes (sex-ratio 72-28). El sex-ratio apuntan claramente segregacion latitudinal sexos, serian cuanto al norte. observaron indicios uso diferencial habitat durante ambos pasos, tal manera ocuparian zona humeda mayor medida lo esperado. baja tasa recaptura (1.9%) sugiere especie comporto mayoritariamente como transeunte, sedimentaciones cortas o moderada duracion. Las aves sedimentadas Parque aumentaron peso pasos experimentaron ligeros descensos centro invernada. Sin embargo, aumento nivel grasa corporal invierno presumiblemente estrategia ante cambios temperatura acortamiento dia, aunque masa muscular descendio, podria provocar perdida neta media encontrada poblacion sedimentada. Los muestran retorno interanual superior hembras, globalmente (1.48%). Palabras clave: anillamiento, comun, phylloscopus collybita, condicion corporal, sex-ratio. Differential migration and wintering of the chiffchaff in wetland Iberian levant. We studied behavior outside breeding season observed two different periods separated by central one. In post we waves, first one, females were more abundant than males, speed passage was faster, while second, male proportion increased greatly decreased. The median date days before males. pre passing pattern: adult - young female female, typical species with differential migration, marked distance between males females, that describe here for time. Males winter pattern point to segregation sexes, where would be as closer grounds. indications use habitat, so occupy greater extent expected. Low recapture rate suggests behaves mainly transient, short, or moderate stopover duration. Birds recaptured, regained weight during both migrations but experienced some loses center winter. Nevertheless, chiffchaffs fat scores presumably an strategy afford changes temperature length day, muscle decreased, which could account losses population show higher between-winter it overall low(1.48%).

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