DIFFERENTIALAGE-RELATED PHENOLOGY IN LESSER BLACK-BACKED GULL LARUS FUSCUS WINTERING IN THE MALAGAAREA
SUMMARY.—We aimed to identify the existence of age-classes groups that shared similar seasonal patterns in migration movements for the lesser black-backed gull Larus fuscus. The gull age-classes groups were defined as sets of age-classes that were present in the harbour of Malaga (South of Spain) si...
Main Authors: | , , , , , , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.670.4113 http://gull-research.org/papers/papers6/salvador1496.pdf |
Summary: | SUMMARY.—We aimed to identify the existence of age-classes groups that shared similar seasonal patterns in migration movements for the lesser black-backed gull Larus fuscus. The gull age-classes groups were defined as sets of age-classes that were present in the harbour of Malaga (South of Spain) simultaneously during the wintering season. We distinguished ten groups of age-classes, which can be subsequently lumped into four big age-class groups: (i) immature stage-class, (ii) young breeders, (iii) age-classes from 6 to 11 years old, and (iv) age-classes older than 11 years old. Our present results supported the ‘dominance and arrival time model’. RESUMEN.—Se pretendía identificar la existencia de grupos de clases de edad con un patrón esta-cional similar en la gaviota sombría Larus fuscus. Los grupos se definieron como conjuntos de clases de edad que estuvieron presentes de forma simultánea siguiendo un mismo patrón temporal en el puer-to de Málaga durante la temporada de invernada. Se distinguieron diez grupos de clases de edad, los cuales a su vez pueden agruparse en cuatro grandes grupos: (i) inmaduros, (ii) jóvenes reproductores, (iii) clases de edad de 6 a 11 años y (iv) clases de aves mayores de 11 años. Nuestros resultados apo-yan la teoría de la ‘posición dominante y el modelo de la hora de llegada’. |
---|