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Influence of the number of feeding environments on the performance of bullfrog tadpoles - doi: 10.4025/actascibiolsci.v36i1.16757 Biological Sciences
Castagna, Airton Antonio; Centro Universitário Augusto Motta; Seixas Filho, José Teixeira; Centro Universitário Augusto Motta; Rodrigues, Eliane; Centro Universitário Augusto Motta; Mello, Sílvia Conceição Reis Pereira; Centro Universitário Augusto Motta; Lima, Jorge Luiz Pereira; Centro Universitário Augusto Motta; Pereira, Marcelo Maia; Universidade Estadual Paulista “Júlio de Mesquita Filho”.
Feeding is one of the major factors that influences the growth and development of animals, justifying thus the present experiment that analyzed the effect of the number of feeding environments on the performance of bullfrog tadpoles through the growth (weight and length) and performance (food remains, average feed intake, average weight gain, and feed conversion). The treatments consisted of subunits of two, four, and eight feeding environments in the experimental units at disposal for the tadpole population, and one without subdivisions, comprising a single environment, during 60 experimental days. The design was completely randomized, with four treatments and three replications. The values were tested using an analysis of variance and Duncan test (α =...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquicultura; Ranicultura performance; Nutrition; Frog farming; Sustainable production Ranicultura performance; Nutrition; Frog farming; Sustainable production.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/16757
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Development of a water recirculating system for bullfrog production: technological innovation for small farmers Ciência e Agrotecnologia
Mello,Sílvia Conceição Reis Pereira; Oliveira,Roberto Rodrigues de; Pereira,Marcelo Maia; Rodrigues,Eliane; Silva,Willian Nascimento; Seixas Filho,José Teixeira de.
ABSTRACT Despite the technological progress in frog farming, issues related to the environment, biosafety, and the use of technologies that minimise environmental impacts are frequently neglected by farmers. With the goal of developing a low-cost technology for reuse and preservation of water quality, an anaerobic filtering system combined with an aerobic filtering system was implemented in the grow-out sector in the Frog Culture Research Unit at Fundação Instituto de Pesca do Estado do Rio de Janeiro (FIPERJ). The filtering system received the effluent from six pens of frogs that were populated with 362 frogs in different development phases. The efficiency of the filtering system was evaluated by an analysis of the water before and after passing through...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Frog farming; Effluent treatment; Environmental preservation; Local development..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100067
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Growth in weight and of some tissues in the bullfrog: fitting nonlinear models during the fattening phase Ciência e Agrotecnologia
Pereira,Marcelo Maia; Mansano,Cleber Fernando Menegasso; Silva,Edney Pereira da; Stéfani,Marta Verardino De.
Knowledge of the growth of animals is important so that zootechnical activity can be more accurate and sustainable. The objective of this study was to describe the live weight, development of liver tissue and fat body, leg growth, and cumulative food intake of bullfrogs during the fattening phase using nonlinear models. A total of 2,375 bullfrog froglets with an initial weight of 7.03 ± 0.16 g were housed in five fattening pens (12 m²). Ten samplings were performed at intervals of 14 days to obtain the variables studied. These data were used to estimate the parameters of Gompertz and logistic models as a function of time. The estimated values of weight (Wm) and food intake (FIm) at maturity and time when the growth rate is maximum (t*) were closer to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Frog farming; Growth curves; Growth rate; Logistic model.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000600009
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Fecal collection methods for the determination of protein digestibility in bullfrogs Ciência Rural
Stéfani,Marta Verardino De; Pereira,Marcelo Maia; Reche,Marcio Roberto; Mansano,Cleber Fernando Menegasso.
Adequate methods for the determination of protein digestibility in bullfrogs are important for the understanding of nutrient utilization. Therefore, this study evaluated two methods of feces collection: intestinal dissection and fecal decantation, using cylindric-conical tanks. Frogs were fed with a commercial diet (45% crude protein) which was ground and supplemented with 0.5% chromium oxide III. The frogs were fasted 48h before force-feeding (5% of the animal's live weight). For the decantation method, the animals were sacrificed 36 h after force-feeding and feces were collected directly from the large intestine. For the sedimentation method, feces were collected when they appeared in the tubes attached to the front end of the cylindric tanks. No...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Protein digestibility coefficient; Methodology; Nutrition; Frog farming.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801492
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Histopathological alterations in bullfrog juveniles fed commercial rations of different crude protein levels R. Bras. Zootec.
Seixas Filho,José Teixeira de; Hipolito,Marcio; Martins,Ana Maria Cristina Rabello Pinto da Fonseca; Rodrigues,Eliane; Castagna,Airton Antonio; Mello,Sílvia Conceição Reis Pereira.
The relationship between the quality of dietary crude protein and health of bullfrog juveniles (Lithobates catesbeianus) was evaluated by necropsy and histopathological examination of animals. The histopathology results showed that animals fed different feeds, regardless of CP levels, presented lymphocytary hepatitis, colitis and flattened microvillosities; kidneys with areas of tubulonephrosis and renal tubule calcification; myocarditis and cardiac muscular fiber dissociation. Such injuries suggested a degenerative nutritional process, with development of inflammatory processes spread to all the organs. These findings suggested that the animals had been fed with proteins of low biological value, indicating, apparently, poor feed quality, that harmed the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal nutrition; Aquaculture; Frog farming.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001200003
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Influence of supplying bullfrog tadpoles with feed containing 28% crude protein on performance and enzymatic activities R. Bras. Zootec.
Seixas Filho,José Teixeira de; Oliveira,Maria Goreti Almeida; Moura,Guilherme de Souza; Lanna,Eduardo Arruda Teixeira; Garcia,Silvana Lages Ribeiro; Lima,Jorge Luiz Pereira.
The objective of this study was evaluate the influence of feeding bullfrog tadpoles on commercial feed containing 28% crude protein (CP), on their digestive enzyme performance and activities. The experiment lasted 60 days, at the density of one tadpole/L in boxes containing 30 L water. A hundred and twenty tadpoles at the 25 Gosner stage averaging weight and length was 0.046 g and 6.22 mm, respectively, were used. Survival rate, length, final weight, weight gain, feed consumption, apparent food conversion, specific growth rate and activities of chime, amylase, lipase and trypisin were the parameters evaluated, biweekly, in five biometries. Quadratic effect was observed for the length and the weight. There was larger growth of the tadpoles from the 15th to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestive enzyme; Digestive physiology; Frog farming; Nutrition; Performance.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000100002
Registros recuperados: 6
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