Nitrogen budget in intensive cultures of Litopenaeus vannamei in mesocosms, with zero water exchange and artificial substrates
Balance de nitrógeno en cultivos intensivos de Litopenaeus vannamei en mesocosmos, sin recambios de agua y con sustratos artificiales
JUAN MANUEL AUDELO NARANJO
LUIS RAFAEL MARTINEZ CORDOVA
DOMENICO VOLTOLINA LOBINA
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"After 29 days without water exchanges, 55% of the total nitrogen (N) inputs were retained as shrimp biomass in 1 m3 cultures of juvenile Litopenaeus vannamei with artificial substrates (Aquamats®), in comparison to 37.2 to 44.8% without Aquamats. The N discharged with the effluent was 1.8-2.3% of the inputs, and the sediments contained 35.9-37.3% of the N inputs without Aquamats and 14.7 to 13.6% with Aquamats. In these, close to 16% of the N inputs were in the periphyton, indicating that additional substrates are an attractive alternative for nutrient recycling in shrimp farms operating as closed systems."
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