Working Group on Science to Support Conservation, Restoration and Management of Diadromous Species



WGDIADWGDIADTrueDennis Ensing, Johan DannewitzEPDSG10/27/2009 12:04:00 PMdennis.ensing@afbini.gov.uk, johan.dannewitz@slu.se439Working Group on Science to Support Conservation, Restoration and Management of Diadromous Species

The Working Group on Science to Support Conservation, Restoration and Management of Diadromous Species (WGDIAD) has a significant coordinating role for work on diadromous species.

​​​​​​​WGDIAD (formerly WGRECORDS) provides a topical forum for the coordination (i.e. those species which use both freshwater and marine environments to complete their life cycles), like eel, Atlantic salmon, sea trout, lampreys, shads, smelts etc. The Group considers progress and future requirements in the field, organizes other Expert Groups, Theme Sessions and Symposia, and helps to deliver the ICES Science Plan. There is a significant role in co-ordinating with other science and advise working groups, science steering groups under SCICOM and also ACOM.

Diadromous species face a number of common problems. Destruction of freshwater and coastal habitats has decreased survival and productivity of diadromous fish populations. Migration obstacles, water abstractions and other activities are reducing the freshwater habitat available for the species. Various human interests to utilize both freshwater and marine environments are in conflict with the well-being of these species. Moreover, several diadromous species are highly valued commercially and it is a major challenge to keep exploitation of these species at sustainable level. The species do not usually have a significant quantitative role in a marine ecosystem, but they are one of the few concrete linkages between freshwater and marine ecosystem and serve as indicators of the status and the functionality of both ecosystems. A persistent decline in marine survival has been common to several of these species resulting in a need for international collaboration and advice.

Management-related research on diadromous species ranges from developing specific assessment methodologies suitable for the life histories and migratory behaviour to addressing research questions related to the well-being of the species.  The human dimension is often strongly present e.g.  conflicts between energy production using hydropower/wind power and wave energy vs. preserving and restoring habitats and their connectivity for the species. ICES’s role as a promoter of the international coordination in these research fields is central.

Similarly, many of the diadromous species are protected under international laws or conventions (IUCN, Habitats Directive, Species at Risk Act, USA) and increasingly more information is being sought on the status of these species and activities which cause difficulties for survival and sustainability.


Print this pagePrint it Request newsletterSend to Post to Facebook Post to Twitter Post to LinkedIn Share it
c FollowFollow Focus on ContentFocus on Content
HelpGive Feedback


International Council for the Exploration of the Sea (ICES) · Conseil International pour l'Exploration de la Mer (CIEM)
ICES Secretariat · H. C. Andersens Boulevard 44-46, DK 1553 Copenhagen V, Denmark · Tel: +45 3338 6700 · Fax: +45 3393 4215 · info@ices.dk
Disclaimer Privacy policy · © ICES - All Rights Reserved