The performance of juvenile Litopenaeus vannamei fed commercial diets of differing protein content, in a super-intensive biofloc-dominated system.

Autor: Prangnell, David Ian, Castro, Leandro Fonseca, Ali, Abdulmehdi S., Browdy, Craig L., Samocha, Tzachi Matzliach
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Zdroj: Journal of Applied Aquaculture; 2022, Vol. 34 Issue 1, p1-22, 22p
Abstrakt: The effect of two commercial feeds of differing protein content, 35% or 40% (HI-35 and EXP), on Pacific White Shrimp Litopenaeus vannamei, performance, and system water quality were investigated. Juvenile shrimp were reared in six 40 m3 indoor raceways containing biofloc-dominated water for 77 days. Performance of EXP-fed shrimp was superior for much of the trial. However, a Vibrio outbreak constrained final production. Final survival was significantly higher (P <.05) with HI-35 (93.1 ± 1.8%) than EXP (83.4 ± 1.6%). No problematic heavy metal accumulation was observed in culture water or shrimp tissue. Higher feed protein content increased nitrite and nitrate concentrations (maximum of 3.6 mg L−1 NO2-N and 401 mg L−1 NO3-N in EXP), and alkalinity consumption. Both feeds supported high growth rates (>2 g week−1) and yields (7.79–8.21 kg m−3), demonstrating their suitability for shrimp culture in super-intensive, biofloc-dominated no exchange systems. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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