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Adult twaite shad spawning migration in the North Sea and the Scheldt estuary
Contact: Coeck, Johan

Availability: Unrestricted after moratorium period
Data are initially restricted, but the access condition relaxes to academic or unrestricted once a specified period of time after an event (such as collection, publication, completion of QC procedures or project cessation) has elapsed

However, shads are very sensitive fish showing adverse reactions to handling and anesthesia, specifically twaite shad. Therefore, internal implantation of electronic tags, such as acoustic, radio and data storage tags is challenging. Preliminary tests are conducted to assess the impact of external tagging on twaite shad survival in Belgium. Fish were caught in the Zeeschelde, with two mid-water beam trawls from an anchored boat in spring 2015, 2016 and 2017 and 39 shads were tagged in total, with coded acoustic transmitters from Vemco. Beside an evaluation of the taggin technique, the data give valuable insights into the migration behaviour of twaite shad in the Scheldt estuary and in the North Sea directly after downstream migation. The dataset will be extended and analysed further in the coming years. more

Although twaite shad (Alosa fallax Lacépède 1803) declined substantially in many European rivers, its numbers increased since 2007 in the Belgian Zeeschelde. Since twaite shad is of conservation concern (Habitat directive), further knowledge on its migration and reproductive behaviour is needed and acoustic telemetry would be a relevant tool to assess these behaviours.

Biology > Ecology - biodiversity, Biology > Fish
Marine/Coastal, Acoustic telemetry, External tagging, Fish migration, Fish movement, Spawning migrations, Tidal estuary, Tracking data, ANE, Belgium, Belgian Coast, ANE, Belgium, Belgian Continental Shelf (BCS), ANE, North Sea, ANE, Western Scheldt, Belgium, Upper Sea Scheldt, Alosa fallax (Lacepède, 1803)

Geographical coverage
ANE, Belgium, Belgian Coast [Marine Regions]
ANE, Belgium, Belgian Continental Shelf (BCS) [Marine Regions]
ANE, North Sea [Marine Regions]
ANE, Western Scheldt [Marine Regions]
Belgium, Upper Sea Scheldt

Temporal coverage
From 2015 on [In Progress]

Taxonomic coverage
Alosa fallax (Lacepède, 1803) [WoRMS]

Universiteit Gent (UGent), moredata creator
Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), moredata creator

Related datasets
Parent dataset:
LifeWatch observatory data: fish acoustic receiver network, more

Based on this dataset
Breine, J. et al. (2017). Successful external acoustic tagging of twaite shad Alosa fallax (Lacépède 1803). Fish. Res. 191: 36-40., more
Breine, J. et al. (2015). Monitoring van de visgemeenschap in het Zeeschelde-estuarium. Ankerkuilcampagnes 2015. Rapport van het Instituut voor Natuur- en Bosonderzoek, INBO.R.2015.11338975. Instituut voor Natuur- en Bosonderzoek: Brussel. 60 + bijlagen pp., more

Dataset status: In Progress
Data type: Data
Data origin: Sensor platform
Metadatarecord created: 2018-01-03
Information last updated: 2018-01-03
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy