Caracterização de efluentes de viveiros de engorda de rã-touro (lithobates catesbeianus, Shaw, 1802)

Aim: Current analysis characterizes the effluent from bullfrog-rearing ponds during the grow-out phase; Methods: Temperature, pH, dissolved oxygen, electric conductivity, turbidity, total phosphorus, N-NH3, N-NO3, BOD5 and COD and the number of thermotolerant coliforms (Escherichia coli) of the inlet and outlet water of the ponds were analyzed twice a week. Assay consisted of a completely randomized experimental design with two treatments (inlet and outlet water) and six repetitions in a split-plot, coupled to collection over time as subplot; Results: All variables were significantly different (p < 0.05) between treatments and over time (p < 0.05). Average rates of temperature, pH and dissolved oxygen levels of the supply water were higher when compared to those of the effluent. The other variables such as conductivity, turbidity, total phosphorus, ammonia, nitrate, biological oxygen demand, chemical oxygen demand and E. coli were higher in the effluent when compared to rates in the supply water; Conclusions: The management during grow-out phase caused the deterioration of the water quality, with increasing levels of dissolved nutrients and the number of thermotolerant coliform. Ammonia and phosphorus levels in the effluent, caused by waste food, skin and feces, accelerate the eutrophication process of the receiving water body. Further studies on effluent treatment are required.

Crescimento, comportamento ingestivo e desempenho reprodutivo de novilhas mestiças holandês x zebu, em pastejo, submetidas à suplementação protéica durante a época das águas

The objective of this study was to evaluate the effect of supplemental protein during the rainy season on body growth, ingestive behavior and reproductive performance of crossbred Gir x Holstein dairy heifers, with mean age of 21 ± 4.1 months and average initial body weight of 296.7 ± 57.3 kg, distributed in a completely randomized design with four treatments and six replicates per treatment. Heifers remained on Brachiaria brizantha cv. Marandu pasture, managed according to a rotational grazing system and, as treatment, it was supplemented with protein concentrate (34%, 43%, 56% and 66% BW) and level of supply of 0.30% body weight (BW). The animals were weighed and the mean weight of the lot was used for the calculation of adjustment of the amount of concentrate offered. Heifers that reached 330.0 kg of live weight were artificially inseminated and, 45 days after insemination, pregnancy diagnosis was performed for the calculation of pregnancy rate and age at conception. No significant difference of protein levels was observed on grazing, eating behavior, productive performance and age at conception of dairy heifers on pasture. The average daily weight gain of BW and age at conception were, on average, 0.907 kg/animal and 24.03 months, respectively.

Seasonal effects on semen and testosterone in zebu and taurine bulls

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Características do crescimento morfométrico e composição corporal de girinos de rã-touro em cativeiro

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação da qualidade de efluentes na criação de rã-touro (Lithobates catesbeianus)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência de probióticos no desempenho produtivo e fisiológico de rã-touro Rana catesbeiana Shaw, 1802

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Perfil de cortisol, glicemia e de parâmetros sanguineos de girinos de rã-touro, Rana catesbeiana, em diferentes densidades e após exposição aérea

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Atividade de fosfomonohidrolases envolvidas com o crescimento e absorção da cauda de girinos de rã-touro (Lithobates catesbeianus)

Pós-graduação em Biotecnologia - IQ

Parâmetros genéticos para características de crescimento, reprodutivas e de carcaça em bovinos Canchim

Pós-graduação em Zootecnia - FCAV

Desempenho e características da carcaça e da carne de bovinos de diferentes grupos genéticos

Pós-graduação em Zootecnia - FCAV

Estudo da interação genótipo-ambiente por meio de modelos de normas de reação em bovinos de corte da raça Nelore

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ocorrência de Salmonella spp. em carcaças e vísceras de rãs (Rana catesbeiana - Rã de Touro): avaliação do processo de abate

Pós-graduação em Medicina Veterinária - FMVZ

Taxas e frequências de alimentação na produção de rã-touro em baias inundadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Crescimento e deposição dos nutrientes da rã-touro na engorda: ajuste de modelos não lineares

Pós-graduação em Aquicultura - FCAV

Estresse de manejo criatório em rãs-touro: aspectos hormonais, hematológicos e morfológicos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)