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Titre :	Fifty years of tern conservation in Brittany
Auteurs :	A Le Nevé, Auteur
Type de document :	Article
Dans :	Alauda (73 janvier 1, 2005)
Article en page(s) :	389-402
Résumé :	Four species of Terns breed regularly in Brittany: Sandwich Sterna sandvicensis, Common Sterna hirundo, Roseate Sterna dougallii and Little Sterna albifrons. Since the 1950's their populations and distribution have been monitored, in the mean time an important network of nature reserves has been progressively established over the whole region. Since 1989 the "Observatoire des sternes de Bretagne" allows the different actors of terns colonies management to share their data in order to establish a regional vision of the species dynamics and enables the valorisation of the volunteer-led colony monitoring. This work is financed by the Conseil régional de Bretagne, the Conseils généraux of Finistère and Côtes-d'Armor as well as the DIREN-Bretagne. Comparing population trends for all species highlights a strong decline during the 1970's of Roseate, Sandwich and, to a lesser extent, Common Tern. The effects of creating new reserves on Tern in Brittany are presented. New reserves have not always resulted in higher breeding populations. In the early parts of the 21st century, nearly all Roseate (70-80 pairs) and Sandwich (1700 pairs) Terns bred in nature reserves, while they held about 60% of Common (1300 pairs) and 50% of Little (65 pairs) Tern. The importance of management (vegetation management, limitation of predators, wardening, public information...) is illustrated using the "île au Dames" colony the Bay of Morlaix.

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