IMIS - Marine Research Groups | ||||
2013_Foyle: Freshwater and coastal migration patterns in the silver-stage eel Anguilla anguilla
Citation
Barry, J., Newton, M., Dodd, J. A., Lucas, M. C., Boylan, P., & Adams, C. E. (2016). Freshwater and coastal migration patterns in the silver‐stage eel Anguilla anguilla. https://marineinfo.org/id/dataset/6333
Contact:
Barry, James Availability:
![]() Description
The unimpeded downstream movement patterns and migration success of small female and male Anguilla anguilla through a catchment in north-west Europe were studied using an acoustic hydrophone array along the River Finn and into the Foyle Estuary in Ireland. more
The unimpeded downstream movement patterns and migration success of small female and male Anguilla anguilla through a catchment in north-west Europe were studied using an acoustic hydrophone array along the River Finn and into the Foyle Estuary in Ireland. Twenty silver-stage A. anguilla were trapped 152 km upstream from a coastal marine sea-lough outlet and internally tagged with acoustic transmitters of which 19 initiated downstream migration. Migration speed was highly influenced by river flow within the freshwater compartment. Anguilla anguilla activity patterns were correlated with environmental influences; light, tidal direction and lunar phase all influenced the initiation of migration of tagged individuals. Migration speed varied significantly between upstream and lower river compartments. Individuals migrated at a slower speed in transitional water and sea-lough compartments compared with the freshwater compartment. While 88.5% survival was recorded during migration through the upper 121 km of the river and estuary, only 26% of A. anguilla which initiated downstream migration were detected at the outermost end of the acoustic array. Telemetry equipment functioned efficiently, including in the sea-lough, so this suggests high levels of mortality during sea-lough migration, or less likely, long-term sea-lough residence by silver A. anguilla emigrants. This has important implications for eel management plans. Scope Themes: Biology > Fish, Fisheries Keywords: Marine/Coastal, Brackish water, Acoustic telemetry, Acoustic Telemetry, Tracking, Anguilla anguilla (Linnaeus, 1758) Temporal coverage
1 July 2013 - 1 March 2014 Quasi continuous (< 1 min.) Taxonomic coverage
Anguilla anguilla (Linnaeus, 1758) [WoRMS]
Contributors
Fisheries Ireland, more, data creator
Related datasets
Parent dataset: European Tracking Network (ETN) data, more Dataset status: Completed
Data type: Data
Data origin: Research: field survey
Metadatarecord created: 2019-10-07
Information last updated: 2023-05-22
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