Working Group on Data Poor Diadromous Fish



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The Working Group on Data Poor Diadromous Fish (WGDAM) amongst other things reports on the status of data-poor diadromous species and looks at current trends and information associated with them.

​​​Diadromous fish are those that travel between fresh water and salt water. There are increasing legal drivers to protect and restore such fish for biodiversity reasons, which has further highlighted knowledge gaps in the species' biology but has also been restrained by social barriers in explaining the species' biological function and ecosystem role. Meanwhile, pressure from development in freshwater, transitional, and marine zones continues to threaten.

Some diadromous species such as eel and salmon are relatively well understood, while other species much less so. New information for many species suggests they have much more complex life histories than previously thought, adding to the need for further investigation.

Many species are protected under the Bern Convention, European Habitats DirectiveCITES, and the IUCN as well as through national regulations. WGDAM aims to increase information on the current status species in the context of classification schemes.

WGDAM also provides an overview of current monitoring and recommendations for future monitoring, evaluates progress in assessment methods, and advances the incorporation of the species in an ecosystem approach.

​The group is an offshoot of the Working Group on Science to Support Conservation, Restoration and Management of Diadromous Species (WGDIAD).


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