Artículo
Effects of stocking density and natural food availability on the extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow Pampean lake in Argentina
Garcia de Souza, Javier Ricardo
; Solimano, Patricio José
; Maiztegui, Tomás
; Baigún, Claudio Rafael M.
; Colautti, Dario César
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Fecha de publicación:
06/2015
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Aquaculture Research
ISSN:
1355-557X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
An experiment was conducted for 80 days at La Salada de Monasterio Lake (Buenos Aires, Argentina) to assess the effect of stocking density and natural food availability on the growth and production of zooplanktivorous juveniles of pejerrey (Odontesthes bonariensis) in extensive cage culture. Ten cages were installed and stocked with 33-day-old fish, at three density treatments: 25, 50 and 75 ind. m-3. Zooplankton was analysed in terms of abundance, biomass and diversity considering three size classes. Caged pejerrey diet was assessed regularly. The pejerrey gut contents composition was clearly different from cage zooplankton, showing a trend to contain bigger components. Reared fish exhibited a tendency to diversification of the diet and to change the mean prey size depending on fish length and stocking density. Regression models showed a positive and direct effect of the bigger zooplankton biomass on fish growth rates, which were also inversely affected by the availability of smaller zooplankton. The results demonstrate that stocking density and available zooplankton, in both quantity and quality, are key factors in regulating extensive cage culture of pejerrey. Handling stocking densities in a dynamic way it is possible to maximize fish growth, biomass harvest or fish number according to the goals of production.
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Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(IIB-INTECH)
Articulos de INST.DE INVEST.BIOTECNOLOGICAS - INSTITUTO TECNOLOGICO CHASCOMUS
Articulos de INST.DE INVEST.BIOTECNOLOGICAS - INSTITUTO TECNOLOGICO CHASCOMUS
Articulos(ILPLA)
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Citación
Garcia de Souza, Javier Ricardo; Solimano, Patricio José; Maiztegui, Tomás; Baigún, Claudio Rafael M.; Colautti, Dario César; Effects of stocking density and natural food availability on the extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow Pampean lake in Argentina; Wiley Blackwell Publishing, Inc; Aquaculture Research; 46; 6; 6-2015; 1332-1344
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