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Consumo de oxígeno del pargo flamenco Lutjanus guttatus (Perciformes: Lutjanidae) durante su cultivo larval

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Actinomicetos aislados de Argopecten purpuratusproductores de enzimas extracelulares y con actividad inhibitoria de patógenos marinos

Intensive culture system of Litopenaeus vannamei in commercial ponds with zero water exchange and addition of molasses and probiotics

Authors

CORRESPONDING

Enox de Paiva Maia

enoxmaia@hotmail.com

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1

Aquarium Aquicultura, Varzea da Ema s/n, Zona Rural, Mossoró, RN, Caixa Postal: 05, Brazil

George Alves Modesto

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1

Aquarium Aquicultura, Varzea da Ema s/n, Zona Rural, Mossoró, RN, Caixa Postal: 05, Brazil

Luis Otavio Brito

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2

Departamento de Pesca e Aquicultura, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, Dois Irmão, 52171-900, Recife, PE, Brazil

Alfredo Olivera Galvez

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2

Departamento de Pesca e Aquicultura, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, Dois Irmão, 52171-900, Recife, PE, Brazil

Tereza Cristina Vasconcelos Gesteira

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3

Centro de Diagnóstico de Enfermidades de Organismos Aquáticos, Instituto de Ciências do Mar, Universidade Federal do Ceará, Avenida da Universidade, 2853, Benfica, Fortaleza, CEP: 60020-181, Brazil

Abstract

A 16-week trial was carried out to evaluate an intensive culture system of Litopenaeus vannamei in commercial ponds with zero water exchange. Two management strategies were used:  one with the addition of molasses (ML) and the second with commercial probiotic and molasses (PML), each with four replicates. Shrimp L. vannamei(2.09 ± 0.3 g) were stocked in 2.6 ha ponds without liners at a density of 98 shrimp m-2. The commercial probiotics used with molasses was a mixture of Bacillus spp. and Lactobacillus sp. After 16 weeks, no significant differences were found in mean dissolved oxygen, temperature, salinity, pH, total heterotrophic bacteria and zootechnical parameters (yield, FCR, survival and final weight) between the two management strategies. Total ammonia nitrogen concentration (53 to 69%) was the highest inorganic nitrogen compound. There were no significant differences between its concentrations in the two management strategies. The addition of molasses and probiotics are important management strategies for increased shrimp growth in an intensive system in ponds with zero water exchange, however, molasses is cheaper than the probiotics. Molasses inputs were based on a percentage of the daily feed allotments (by weight) and application rates of 30% of total daily feed in combination with commercial probiotics in intensive ponds without liners with zero water exchange was not sufficient to recycle all nitrogen waste with 10 HP ha-1.

Key words

Molasses, probiotics, total heterotrophic bacteria, zootechnical parameters

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