Intensive nursery production of the Pacific white shrimp Litopenaeus vannamei using two commercial feeds with high and low protein content in a biofloc-dominated system

•Litopenaeus vannamei PL were fed low (LP30) and high (HP40) protein diets in limited exchange nursery raceways.•Molasses prevented significant accumulation of NH3 but not NO2 in the culture medium.•The HP40 treatment had higher NO2, NO3 and PO4 than the LP30 treatment.•Shrimp fed HP40 had higher gr...

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