In 2011, the Duero Basin Authority began a program to recover longitudinal connectivity in the upper basin of the river, removing or making transverse barriers permeable. Icthios has managed the monitoring and evaluation of the project, analyzing the migratory movements of salmonids and cyprinids and evaluating longitudinal connectivity in a 25 km stretch of river. For this study, radio telemetry techniques (PIT tagging and radiotracking) have been used with more than 8,000 tagged fish (brown trout, Iberian barbel, Northern straight mouth nase and Iberian chub).
The results of this study have been published in scientific journals and conferences:
Marcos, C. & González, G. (2015) Longitudinal connectivity recovery in Corneja River (Spain). Fish Passage 2015. Groningen (Holanda). Junio de 2015.
Marcos Primo, C., González Fernandez, G., 2015. Acciones de mejora de la conectividad fluvial en la cuenca alta del Tormes. RestauraRios 2015: 697–702.
Pedescoll, A., Aguado, R., Marcos, C., González, G., 2018. Performance of a pool and weir fishway for Iberian cyprinids migration. A case study. VII Iberian Congress of ichthyology (SIBIC 2018), June 13-15, 2018, Faro, Portugal.
Pedescoll, A., Aguado, R., Marcos, C., González, G., 2019. Collateral damage of a dam. Ecological flow as an afterthought. Restaurarrios. 2019:367- 373
Pedescoll, A., Aguado, R., Marcos, C., González, G., 2019. Reconnecting the Tormes river (Spain): 3 years monitoring results, Restaurarrios 2019: 790-796
Pedescoll, A., Aguado, Marcos, C., González, G., 2019. Performance of a Pool and Weir Fishway for Iberian Cyprinids Migration: A Case Study. Fishes 4, 45. 11 pp
To know more:
https://www.chduero.es/migraciones-piscicolas-y-conectividad-longitudinal-parte-i-el-rio-tormes
https://www.rtve.es/alacarta/videos/la-aventura-del-saber/aventuramrtormes/3869663/