Biomassa sustentável de juvenis de pirarucu em tanques-rede de pequeno volume

Cavero, Bruno Adan Sagratzki; Pereira-Filho, Manoel; Roubach, Rodrigo; Ituassú, Daniel Rabello; Gandra, André Lima; Crescêncio, Roger

doi:10.1590/s0100-204x2003000600008

Cited by 8 publications

(8 citation statements)

References 2 publications

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“…A total of 120 Arapaima juveniles were acclimatized for 10 days in tanks of 5,000 L. Then, 96 individuals (11.49 ± 1.70 g and 12.55 ± 1.42 cm) were selected by similar size and distributed in 12 net cages of 1 m 3 at stocking density of eight fish per cage. This stocking density and biomass corresponded to the smallest number of individuals required per replicate for statistical analysis and the minimum stocking density recommended by Cavero et al () for culture of the species in cages. During the following 68 days, fish were fed at 10% of live weight (adjusted based on biometric measures) three times per day (9:00, 14:00 and 17:00 hr).…”

Section: Methodsmentioning

confidence: 76%

“…Biometric measures were taken twice (at 32 and 68 days) to determine the growth performance, determining biomass, weight gain, survival, feed conversion ratio (Cavero et al, ; Dias et al, ), specific growth rate (SGR(%): ln final weight − ln initial weight/days of experiment), relative condition factor (Kn: observed weight/expected weight) and fish uniformity growth following Ribeiro, Preto, and Kochenborger ().…”

Section: Methodsmentioning

confidence: 99%

“…Arapaima gigas is a species endemic to the Amazon region, known locally as ‘pirarucu’, and with a production of 8.6 tons in 2016. Its production has expanded because it presents rapid growth, reaching 10 kg in just one year, breaths air and accepts artificial feed despite being a carnivorous fish (Cavero et al, ; IBGE, ; Oliveira et al, ). The production of native species has grown by 43.7% in Brazil (Brasil, ; Peixe Br, ), and this increase is a result of the use of new production strategies, including net cages and feeds to improve growth performance and immune responses (Brum et al, ; Inoue, Maciel, Affonso, Boijink, & Tavares‐Dias, ; Merrifield et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of anEnterococcus faecium‐based probiotic on growth performance and health of Pirarucu,Arapaima gigas

et al. 2019

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Intensive fish farming has resulted in an increased concern for disease outbreaks. Probiotic use is one of the strategies being developed to improve fish health and productivity. Measures of probiotic colonization, growth performance, haematological characteristics and parasite load were used to evaluate the effect of diets supplemented with Enterococcus faecium on growth and health of Arapaima gigas juveniles. A completely randomized design with four treatments (diet with E. faecium at 1 × 106 CFU/g and 1 × 108 CFU/g, control diet and diet with the culture medium MRS) and three replicates was used. Ninety‐six Arapaima juveniles were distributed in 12 cages fed with the specified diet for 68 days. Colonization of the intestinal tract by lactic acid bacteria reduced the total number of heterotrophic bacteria in fish fed with probiotics compared to controls. Fish fed a supplemented diet containing 1 × 108 CFU/g presented higher values of weight gain, survival and fish growth uniformity, and lower values of feed conversion ratio. The prevalence of Trichodina sp. could have affected the survival of fish in the control group. Reduction in parasite load and an increase in haematocrit, the number of erythrocytes, thrombocytes, neutrophils and monocytes were also observed in fish fed the diet containing 1 × 108 CFU/g. Enterococcus faecium presented a probiotic effect in A. gigas juveniles and can be recommended for use at a concentration of 1 × 108 CFU/g to modify the gut microbiota, improve growth performance and haematology and reduce parasitic load.

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Section: Methodsmentioning

confidence: 76%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of anEnterococcus faecium‐based probiotic on growth performance and health of Pirarucu,Arapaima gigas

et al. 2019

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“…Os resultados das biometrias foram utilizados para calcular os seguintes índices que refletem o crescimento dos animais: crescimento específico em peso (CE (%) = 100 × (Ln peso final -Ln peso inicial) /tempo), fator de condição alométrico (k = peso/comprimento b x 10 3 ), sobrevivência final e biomassa final (BF) equivalente à relação entre sobrevivência final e o peso médio final obtido (BF (g) = [número final de peixes/tanque-rede] x peso médio), de acordo com Cavero et al (2003b).…”

Section: Methodsunclassified

“…Nesse sistema são criados peixes com hábitos alimentares distintos, como demonstram os estudos realizados com a onívora tilápia Oreochromis niloticus (Sonoda, 2002), com o carnívoro pirarucu Arapaima gigas (Cavero et al, 2003b), com o frugívoro tambaqui Colossoma macropomum (Brandão et al, 2004) e com a perca-prateada Bidyanus bidyanus (Rowland et al, 2004).…”

Section: Introductionunclassified

Crescimento de Pimelodus maculatus (Actinopterygii, Pimelodidae) estocados em diferentes densidades em tanques-rede

Almeida¹,

Nuñer²

2011

Biotemas

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ResumoO estudo teve por objetivo avaliar a influência das densidades 8, 32, 56 e 80 peixes/m 3 sobre o crescimento de Pimelodus maculatus (mandi-amarelo) em tanques-rede de 1m 3 instalados em viveiro de terra de 0,19ha, sem renovação de água, localizado em uma propriedade particular em Santo Amaro da Imperatriz, Santa Catarina. Os peixes foram alimentados diariamente com ração comercial extrusada contendo 32% de proteína bruta, na proporção de 5% da biomassa estocada. Foram realizadas biometrias mensais de 30% do número de peixes estocados em cada tanque-rede para avaliação do comprimento total, peso total, crescimento específico, fator de condição, sobrevivência e biomassa. Ao final do experimento o comprimento e o peso foram iguais nas densidades 8, 32 e 56 peixes/m 3 , e superiores aos registrados com 80 peixes/m 3 . A sobrevivência foi igual nas diferentes densidades, apresentando média de 91,4 ± 5,4%, sendo que as maiores biomassas foram registradas nas densidades 56 e 80 peixes/m 3 . Os resultados demonstraram a influência das densidades testadas sobre o crescimento dos peixes e indicaram a densidade de 56 peixes/m 3 como a ideal para o crescimento de juvenis de P. maculatus. No entanto muitas informações ainda deverão ser produzidas para otimizar a produção de biomassa desta espécie. Unitermos: mandi-amarelo, crescimento, cultivo intensivo AbstractGrowth of Pimelodus maculatus (Actinopterygii, Pimelodidae) in cages at different stocking densities. This study aimed to evaluate the influence of densities 8, 32, 56 and 80 fish/m 3 on the productive performance of Pimelodus maculatus in 1m 3 cages installed in 0.19ha earthen ponds without water renewal, located on private property in Santo Amaro da Imperatriz, Santa Catarina. Fish were fed daily with extruded commercial ration containing 32% of crude protein, in a proportion of 5.0% of the stocked biomass. Fish were sampled monthly (30% of the stocked fish) in each cage to evaluate length, weight, specific growth rate, survival, condition factor and biomass. Final length and weight were the same at densities 8, 32 and 56 fish/m 3 , with values higher than those registered with 80 fish/m 3 . The survival was the same at the different densities, with a mean of 91.4 ± 5.4%, Biotemas, 22 (3): 113-119, setembro de 2009

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Effects of stocking density on the performance of juvenile pirarucu (Arapaima gigas) in cages

et al. 2012

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Pirarucu, Arapaima gigas, is a carnivorous freshwater fish that exists along the Amazon Basin. This study investigated the effect of stocking density on growth performance and economic return of pirarucu in cages. Fish were stocked at densities of 10 or 12.5 fish/m 3 in 4.0-m 3 cages installed in Sítios Novos Reservoir (Ceará State, Brazil), with three replicate cages for each density. Fish were fed a formulated diet containing 40% crude protein and 14.2 MJ/kg of feed and cultured for 140 days. The following physicochemical parameters of the water were always at satisfactory levels for fish culture throughout the experiments: water temperatures ranged from 26.3 to 30.2°C, DO 3.2 to 7.7 mg/L, pH 6.9 to 7.7 and transparency 100 to 130 cm. Survival was high and ranged between 100.0% and 94.7 ± 5.0% in cages at 10 and 12.5 fish/m 3 , respectively. Density significantly affected (P b 0.05) final mean weight (2630.4 ± 213.7 and 2138.0 ± 148.2 g) and weight gain (2516.9±202.0 and 2043.1±142.9 g). In contrast, specific growth rate (2.25±0.09 and 2.22±0.06%/day), feed conversion ratio (1.2±0.1 and 1.2±0.2) and production (26.3±2.1 and 25.4±2.6 kg/m 3 ) were not significantly (P>0.05) affected by stocking density. Economic analysis was emphasized mostly on sales price and pirarucu juveniles and feed costs. The total costs of production were estimated at US$4.52/kg and US$5.31/kg for stocking densities of 10 fish/m 3 and 12.5 fish/m 3 , respectively. At a local market price of US$5.55/kg, the model used suggests that a commercial enterprise can be profitable only for density of 10 fish/m 3 . Furthermore, the economic viability of implementing of pirarucu culture in cages was analyzed using profitability indicators such as internal rate of return (IRR), net present value (NPV) and payback period. The high survival, very fast growth and moderated production rates of pirarucu stocked demonstrate that cages are a viable alternative method to standard ponds for the commercial production of pirarucu. The economic indicators appear to be attractive, thus pirarucu cage culture can become a profitable industry.

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Biomassa sustentável de juvenis de pirarucu em tanques-rede de pequeno volume

Cited by 8 publications

References 2 publications

Effects of anEnterococcus faecium‐based probiotic on growth performance and health of Pirarucu,Arapaima gigas

Effects of anEnterococcus faecium‐based probiotic on growth performance and health of Pirarucu,Arapaima gigas

Crescimento de Pimelodus maculatus (Actinopterygii, Pimelodidae) estocados em diferentes densidades em tanques-rede

Effects of stocking density on the performance of juvenile pirarucu (Arapaima gigas) in cages

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