Case Study: Guipuzcoan rivers

Estibaliz Díaz Iker Azpiroz Aitor Lekuona Location River basin characteristics

Basin Estuary surface Surface Lenght Q med River (km²) (km²) (km) (m3/s)

Deba 533.8 0.71 62.4 15.3 Urola 337.5 0.98 63.5 9.5 882.5 2.05 82.7 25.9 279.0 1.34 59.4 13.6 Oiartzun 85.3 0.98 16.6 3.2 Bidasoa 700.0 6.83 69.0 24.7 Population

Active Population: 719282 hab. persons (n) % Agriculture/Fishery 2000 0.6 Industry 83200 25.1 Density: 354 Hab/km² Construction 16700 5.0 Services 215900 65.2 Unnemployed 13100 4.0 Total 330900 100 Water quality Obstacles Diadromous species in : 80ies

River Shad Lamprey Eel Salmon Trout Sturgeon Mullet Deba Urola Oria Urumea Oiartzun Bidasoa Diadromous species in Gipuzkoa: Now

River Shad Lamprey Eel Salmon Trout Sturgeon Mullet Deba ? ? ? Urola ? ? ? Oria ? Urumea Oiartzun ? ? Bidasoa Linking ecosystem services with the socio- economic system 2. To identify the list of 1. List of goods and services provided by diadromous species human activities Provisioning: • Food provision • Glass eel recreational Regulating: fishery • Regulation of food web and ecosystem • Glass eel traditional dish • Transporting energy and nutrients from river to sea and reverse on Christmas and San Cultural: Sebastian eve • Gastronomy/tradition • Use of the fish passes • Recreation and stocking actions for • Environmental education environmental • Natural heritage and natural service (the existence value of nature and species education themselves) • Social relations linked to • Scientific the fishery • Spiritual: Satisfaction of knowing that some diadromous are recolonizing the • Diadromous related rivers due to the increase of the habitat quality scientific groups 3. Reasons to identify and monetary assess the ecosystem goods and services • - Enhancing the value of diadromous species so as to increase the desire of managers and society to protect them and their habitat Gipuzkoa: Traditional fishery and cradle of glass eel trade Glass eel fishery and Basque culture Glass eel trade was born in Gipuzkoa Salmon are back in Gipuzkoa! Salmon in the old days

More than 1000 salmons in the pots

BIDASOA Salmon disappearance

1870

1938

1940 Salmon are back! Work in progress ADDRESS PHONE & EMAIL SOCIAL MEDIA AZTI [email protected] esti_azti Txatxarramendi ugartea z/g + +34 667 174 412 48395