Consultez les articles du Bulletin Aves !
Aves, 39/3-4 | 2002 | 145-158
Development of the wintering of Great Cormorant (Phalacrocorax carbo) in Walloon Region and Brussels (Southern Belgium) between 1990 and 2003.
Paquet, J.-Y. et la Centrale Ornithologique Aves
Great Cormorant night roost counts are conducted in Walloon Region and Brussels area (Central and Southern Belgium) since 1990, on a monthly basis during the winter period. This Greeat Cormaorant wintering population survey offers the opportunity to describe the colonisation pattern of a new wintering area, where destrcution and disturbance of cormorants are still relatively rare. While almost no wintering cormorants were present in Walloon Region during the eighties, their current density is among highest recorder for any country in Europe (25 for 100 km2 - 5,363 individuals present in January 2003). The cormorant wintering population first settled in 1991 in the lower river Meuse valley, a slow-flowing eutrophicated and canalised river. Until the 1996-1997 winter, cormorant numbers increased steadly (+60% annually on average) but only the Meuse valley was occupied. The 1996-1997 severe winter coincided with a temporary doubling of cormorant numbers and the occupation of new sites like the Sambre, the canalised Meuse river main tributary. after a rapid reduction in number for the mild 1997-1998 winter, the wintering cormorant increased continuously (+17% annually), mostly thanks to the creation of new roost sites in the upper part of the Meuse tributaries, along ponds, lakes and canals. The establishment of new small rossts in other habitats was not associated with a decrease in number in the Meuse valley. Recently new roost creation was not anymore related to a further enlargement of potential fishing areas but, probably a reduction of roost to fishing place distances. The inter-roost distances are very low (less than 12 km in average), and cormorans coming from neighbour roosts are possibly sharing the same fishing grounds. Contrary to other wintering areas, cormorant numbers are lower in November than in mid-winter. This suggests a current possible underuse of Walloon Region as staging area during post-nuptial migration.
Articles on the same species
Grand Cormoran Consultez la fiche de l'espèce
Results of the winter waterbirds censuses in Wallonia and Brussels area (Belgium) in 2015-2016 ()
Jean-Paul Jacob, Marie Vanschepdael, Jean-Yves Paquet et les responsables régionaux - Aves, 53/3 | 2016
Breeding birds in Wallonia in 2015 ()
Jean-Paul Jacob et les contributeurs-espèces - Aves, 53/1 | 2016
Results of the winter waterbirds censuses in Wallonia and Brussels area (Belgium) in 2012-2013, 2013-2014 and 2014-2015 ()
Jean-Paul Jacob, Marie-Charlotte Alvarez et les responsables régionaux - Aves, 53/1 | 2016
Phenology and intensity of diurnal postnuptial migration in the North Eastern Ardennes by migration monitoring (Ramecroix 2006-2010) ()
Arnaud Beckers & André Baron - Aves, 51/2 | 2014
Status of Yellow-legged Gull Larus michahellis, Herring Gull L. argentatus and Caspian Gull L. cachinnans in the Entre-Sambre-et-Meuse Region ()
Philippe Deflorenne - Aves, 51/1 | 2014
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Articles published in the same bulletin
Habitat modeling: a tool for forest ecology management. A case study of Lesser Spotted Woodpecker (Dendrocopos minor) in belgian Ardenne.
Delahaye, L., Derouaux, A., Delvingt, W.
Study of the diet and food-selectivity of the Great Cormorant (Phalacrocorax carbo sinensis) wintering in belgian high-Meuse.
Evrard, G., Tarbe, A.L.
A standardised method for the census of Littel Owl (Athene noctua).
Van Nieuwenhuyse, D., Belis, W., Bodson, S.
Habitat choice in the Common Crossbill (Loxia curvirostra) following the 2002 invasion : an example in the bois du Hatrai at Sart-lez-Spa.
Monk parakeet (Myiopsitta monacha) nest on a construction crane in Brussels.
A breeding case of the Eurasian Wigeon in Wallonia.