INVESTIGADORES
COLAUTTI Dario Cesar
artículos
Título:
EXTENSIVE CAGE CULTURE OF PEJERREY (Odontesthes bonariensis) IN A SHALLOW PAMPEAN LAKE IN ARGENTINA
Autor/es:
COLAUTTI, D. C.; GARCIA DE SOUZA, J. R.; BALBONI, L.; BAIGUN, C.
Revista:
AQUACULTURE RESEARCH
Editorial:
Wiley-Blackwell
Referencias:
Lugar: Oxford UK; Año: 2010 p. 376 - 384
ISSN:
1355-557X
Resumen:
Pejerrey is mostly a zooplanktivorous fish and one of the most important native fish of Argentinean inland waters. This species has been traditionally cultured by still costly semi-intensive and intensive methods mainly for stocking purposes. In this study we evaluated the implementation of an extensive culture method by using floating cages in a shallow pampean lake, taking advantage of the high zooplankton productivity of the lake. Four cages were located in Lacombe Lake and stocked with juveniles (16.24±1.69mm total length) at 50 fish m-3 density. Along the experiment, the temperature ranged between 10 and 26 °C and the lake zooplankton biomass ranged between 12 and 3269 µg dw L-1. The growth patterns in length were similar in the four cages and directly related to the lake thermal conditions. The average final total length after 315 days was 154.4±8,8mm. The survival rate ranged between 53.5 and 64.7% during the first 110 days, then decreasing to 11.1-25.7% for the whole experimental period. Growth rate for the first two months was the highest documented for pejerrey culture. This simple technique offers the possibility to obtain juvenile pejerrey at a low cost and provides the alternative of reinforcing the natural populations with fish already adapted to the natural environmental conditions.