Propuesta de gestion de la pesca en las poblaciones de trucha comun del rio Louzara (Lugo, Espana)

Maria Monica Lopez, Alfredo Rios and Guillermo Munoz

Revista Espanola de Estudios Agrosociales y Pesqueros, 2010, issue 227, 20

Abstract: Se describe la situacion de las poblaciones de peces del rio Louzara a partir del inventario demografico de la especia principal, la trucha comun, y a partir del analisis de la presion pesquera y del habitat (calidad del agua, fisiografia del cauce y vegetacion de la cuenca). Se han realizado nueve estaciones de muestreo por pesca electrica, registrandose la longitud furcal, peso, edad y crecimiento de las escamas sobre los ejemplares capturados. Los resultados informan de un habitat de gran calidad para la trucha, muy levemente alterado por la accion humana pero con baja biomasa poblacional (11,5 kg/ha) y fuertes desequilibrios entre edades. Se concluye que la elevada presion de los pescadores, debida a un regimen de aprovechamiento libre, esta en el origen de los desequilibrios demograficos detectados. Se propenen las medidas de gestion a aplicar para favorecer la regeneracion natural de las poblaciones de trucha. The situation of the fish population in the Louzara River was described from the study of the demographic characteristics of the main species, brown trout, and the environment analysis (quality of the water, physiography of the river bed, vegetation of the basin and fishing effort). A fish inventory was carried out in nine sampling points by means of electric fishing. Length, weight, age and growth were measured in individuals captured. The strong influence of the overfishing pressure on a free fishing area in a slightly altered environment was shown (low stocks, 11.5 kg/ha, and unbalanced ages). Finally, management rules were proposed in order to improve the populations of brown trout.

Keywords: Farm Management; Land Economics/Use; Livestock Production/Industries (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:ags:spreea:186504

DOI: 10.22004/ag.econ.186504

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