Since 2005, when ICES Diadromous Fish Committee published its report in on the status and distribution of these poorly understood species, there have been increasing legal drivers to protect and restore diadromous fish for biodiversity reasons. This has further highlighted knowledge gaps in the biology of these species, but has also been restrained by social barriers in explaining the biological function and importance of these species in the wider ecosystem. Meanwhile, pressure from development in freshwater, transitional and marine zones continues to threaten the life cycle of these species.
Some diadromous species such as eel and salmon are relatively well understood, while other species much less so. In addition, new information for many species suggests they have much more complex life histories than previously thought, adding to the need foru further investigation.
WGDAM's objectives are to:
Many of these diadromous species are protected under the Bern Convention, European Habitats Directive, CITES, IUCN and additionally also through national regulations. The group aims to increase information on the current status of data-poor diadromousfish species in the context of international or national classification schemes.
The group is an offshoot of the Working Group on Science to Support Conservation, Restoration and Management of Diadromous Species (WGDIAD).