Incremento de la población invernante de Cormorán Grande (Phalacrocorax carbo) en la provincia de Jaén
- Carrasco, Antonio
- Muñoz-Cobo Rosales, Joaquín
- Azorit, Concepción
- Carrasco, Dolores
- Carrasco, Rafael
ISSN: 1138-3399, 1989-2128
Année de publication: 2002
Número: 24
Pages: 161-166
Type: Article
D'autres publications dans: Anales de biología
Résumé
This essay surveys the evolution of the wintering population of the Great Cormorant (Phalacrocorax carbo) in the province of Jaen. During 1996 and 2001, all the water masses possibly holding roosts have been sampled, totalling 34, during the last week in december and first in january during each one of the two winter seasons (1995/96 and 2000/ 2001). The first survey found out 6 roosts and estimated a total of 149 individuals, whilst 7 roosts were located in the second survey, but the estimated population totalled 964 birds. Only 2 of the 6 former roosts repeated their location during the last winter season, one of them had its population diminished in 54 % (47 birds). It should be noted that one of the roosts held 91,6 % of the population during the winter season of 2000/2001 and also acted as roosts for 1.120 Cattle Egrets (Bubulcus ibis).