Intensification of Amazon River Prawn Hatchery
2024
Michelle Pinheiro Vetorelli | Laurindo André Rodrigues | Janaina Mitsue Kimpara | Wagner C. Valenti
The effects of the intensification on the performance of the Amazon River prawn hatchery carried out in a simple recirculation system were investigated. Newly hatched larvae were stocked in 120 L tanks at 80, 100, 120 and 140 larvae L&minus:1 in a closed recirculating system. The experiment used a randomized block design with five replicates. An exponential equation was adjusted to express the relationship between the stocking density and productivity (postlarvae L&minus:1). The development, larval quality, survival and postlarval (PL) dry weight did not significantly differ among the treatments (p >: 0.05). When 80 larvae were stocked, the productivity (54 ±: 11 PL L&minus:1) was lower than those at higher densities (p <: 0.05). Stocking 120 and 140 larvae L&minus:1 resulted in higher productivities (75 ±: 18 and 80 ±: 17 PL L&minus:1, respectively) with a lower use of Artemia nauplii to produce each postlarvae (~1200 Artemia nauplii PL&minus:1). The maximum mean M. amazonicum postlarval production estimated by the exponential model was 93 PL L&minus:1. This means that despite the increase in stocking density, productivity tends to stabilize. The results showed that M. amazonicum tolerates high intensification in recirculating hatchery systems based on a crushed shell bed biofilter, and the intensification optimizes Artemia use.
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