Biodiversité

Le projet SAlmonid MAnagement Round the CHannel (SAMARCH) s’est clôturé les 14 et 15 mars 2023 à Southampton (Royaume-Uni). Ce projet franco-anglais était destiné à acquérir de nouvelles informations dans les estuaires et les eaux côtières pour améliorer la protection de nos saumons et truites de mer sauvages menacés.

A new study by BirdWatch Ireland, published in the latest issue of its annual scientific journal, Irish Birds, has found that the number of waterbirds wintering in Ireland has declined by 15% over the past five years. More alarming is the comparison over a longer time period, which shows that our wintering waterbirds have declined by almost 500,000 individuals (40%) since the mid-1990’s, a truly shocking finding.

Dans le cadre du programme européen Interreg Samarch, une équipe de l’Agence française pour la biodiversité prévoit de suivre les déplacements de poissons migrateurs. Les premiers résultats du terrain valident le protocole de détection et de capture-recapture des poissons concernés.

Du 16 au 18 mai 2018, le Forum international SAMARCH, organisé par Normandie Grands Migrateurs au Mont Saint-Michel, a permis la rencontre entre scientifiques et gestionnaires français et britanniques.

Studying the at-sea movements and behaviour of juvenile seabirds is logistically challenging, but new technologies now allow tracking birds on their first migration, giving a more complete picture of population-level spatial ecology. We investigated the post-fledging migration of juvenile northern gannets Morus bassanus from the world's largest colony, at Bass Rock, Scotland. We first examined the movements and survival of 38 juveniles over their initial days at sea with GPS precision for up to 53 d post-fledging. We then compared their migration journeys with those of 35 adults tracked with geolocators.