Stocks assesment, biomass and fish production in two mediterranean basins (NE Spain)


Autoria(s): Zamora Hernández, Lluís; Saavedra, D.; Moreno i Amich, Ramon
Data(s)

06/06/2013

Resumo

In order to evaluate the success of the reintroduction of the Eurasian otter (Lutra lutra) in the Empordh wetlands (Parc Natural dels Aiguamolls de I'Empordhà), and the Muga and Fluvih basins, density of fish, biomass and production in the Muga and Fluvia Rivers have been estimated, since fishes represent the principal prey in the otter diet. 12 study sites were selected in order to survey the main flows in both basins. Electrofishing surveys were conducted by blocking off the station with barrier nets, which was performed upon 3 successive catches. The density estimated presents a range of 1,136-1 25 ind .ha' in the Muga basin, 4,49-163 ind.ha' in the Fluvih basin and 3,76-52,2 ind.ha' in the Empordh wetlands. Estimated biomass ranges are 0,616-277,6 g.m2, 8,79-351,2 g.m2, and 5,7-108 g.m-2 respectively. These density anfi biomass ranges are similar to other results obtained from rivers inhabited by the Eurasian otter in NE Spain

Identificador

http://hdl.handle.net/10256/7895

Idioma(s)

eng

Publicador

Asociación Española de Limnología

Direitos

Tots els drets reservats

Palavras-Chave #Aiguamolls de l'Empordà (Catalunya) #Aiguamolls de l'Empordà (Catalonia) #Parc Natural dels Aiguamolls de l'Empordà (Catalunya) #Biologia de poblacions -- Catalunya -- Aiguamolls de l'Empordà #Population biology -- Catalonia -- Aiguamolls de l'Empordà
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion