Map Viewing Service (WMS) of the dataset: Stream Lines colonised by Sea Trout (TRM)

The new management plan for migratory fish in the Seine-Normandie Basin for the period 2016-2021 was adopted by the Basin Coordinating Prefect on 21 June 2016. Drawing up by the Management Committee for Migratory Fishes, it shall, in consultation with the main water users, issue guidelines and recommendations to enable the management of habitats and human activities compatible with the conservation of migratory fish. The development and monitoring of the plan is possible, in particular through the Migratory Association SEINORMIGR, which drives the migratory component throughout the basin and monitors PLAGEPOMI indicators. This layer reflects the stream line colonised by Sea Trout as of 2014: • “colonised linear”: colonised lines accumulating accessible and partially colonised areas; • “linear accessible without biological data”: accessible linears on which there is no biological data attesting to the presence of the species even though they are physically productive vis-à-vis it; • “insufficient data on attendance and accessibility”: lines for which data are insufficient to decide on the attendance and accessibility of a particular species; • “non-accessible line”: non-accessible lines for physical works classified as impassable which delimit them downstream; • “biological limit of the species”: biological boundaries representing areas considered not conducive to breeding and/or development of juveniles.