Stocking density of yellowtail lambari (Astyanax lacustris) in earthen ponds for small-scale aquaculture
DOI:
https://doi.org/10.20950/1678-2305/bip.2026.52.e998Keywords:
Growth, Logistic model, Water quality, Feed intakeAbstract
The yellowtail lambari, Astyanax lacustris, is a small-sized species suitable for small-scale aquaculture. Five stocking densities (10, 25, 50, 75, and 100 fish/m2) were evaluated in three production cycles. Experimental units were 50-m2 earthen ponds, with minimal water replacement to compensate for infiltration and evaporation. Sixty-day-old fish (5.67 ± 0.10 cm and 2.67 ± 0.16 g) were fed a commercial diet twice daily in 45-day production cycles. Stocking densities influenced lambari growth. Lambari growth at all treatments showed good fit in the logistic model, but lower densities resulted in higher growth rates and larger asymptotic sizes. Among productive performance parameters, daily weight gain and specific growth rate were inversely proportional to stocking density, whereas the number of fish and biomass produced per area were directly proportional. These growth results were associated with reduced water quality and feed intake at higher stocking densities. Fish density did not affect feed conversion ratios (ranging from 1.44 to 1.58) but did influence carcass yield (82.00 to 84.85%). Under the conditions of this study, intermediate stocking densities showed good balance between growth and productivity per area.
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Copyright (c) 2026 Camila Fernandes Correa, Dariane Beatriz Schoffen Enke, Rafael Vilhena Reis Neto, Eloisa Peniche Tamasia, Liandra Lopes Filholino Collaço
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