Automação do fornecimento de ração para organismos aquáticos

• Autor(a) principal: Ribeiro, Raphaela Rezende [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/132960
• topic: Automatic feeding; Performance; Frog culture; Powdered food; Lithobates catesbeianus; Alimentação automática; Ranicultura; Ração em pó; Desempenho

The success of frog culture depends on the quality of tadpoles, resulting in large and healthy juveniles for rearing. The tadpoles production is the bottleneck of frog culture and its deficit results in a lack of production stability. One of the limiting factors in the frog breeding is the need to provide powder food in the water, as it has low stability and little time fluctuation, reducing its availability and quality due to the sinking and leaching. One way to improve the availability of powder food is increase feeding frequency. This study was to evaluate the effect of feeding frequency and time on performance of bullfrog tadpoles (Lithobates catesbeianus). The experiment was conducted in a factorial completely randomized design, 3x2, with three feeding frequency (12, 24 and 48 times / day) in two periods of supply, day and night, with 5 repetitions each. 30,000 tadpoles were distributed in 30 cages of 0.294 m³ in a pound. The powdered food containing 32% CP was provided through pre-programmed automatic feeders. There was interaction between the treatments; the tadpoles fed 48 meals a day at night gained more weight (4,35g) compared to other treatments. The production of tadpoles in cages with high frequency power and at night proved to be the best treatment at this stage of creation of the bullfrog . This management used decreased the time of metamorphosis of these animals.