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| Vidal, Luiz Vítor Oliveira; Programa de Pós Graduação em Zootecnia - Universidade Estadual de Maringá; Furuya, Wilson Massamitu; Departamento de Zootecnia - Universidade Estadual de Ponta Grossa; Martins, Elias Nunes; Departamento de Zootecnia - Universidade Estadual de Maringá; Xavier, Tadeu Orlandi; Programa de Pós Graduação em Zootecnia - Universidade Estadual de Maringá; Michelato, Mariana; Programa de Pós Graduação em Zootecnia - Universidade Estadual de Maringá; Graciano, Thêmis Sakaguti; Programa de Pós Graduação em Zootecnia - Universidade Estadual de Maringá. |
| The objective of this study was to formulate a mathematical model to estimate digestible energy in animal feeds for tilapia. Literature results were used of the proximate composition of crude protein, ether extract, mineral matter and gross energy, as well as digestible energy obtained in biological assays. The data were subjected to stepwise backward multiple linear regression. Path analysis was performed to measure the direct and indirect effects of each independent variable on the dependent one. To validate the model, data from independent studies and values obtained from a digestibility trial with juvenile Nile tilapia testing five meat and bone meals (MBM) were used, using the Guelph feces collecting system and chromium oxide (III) as an indicator.... |
| Tipo: Fieldwork |
Palavras-chave: 5.07.01.01-0 nutrition; Nutritional value; Estimate; Linear models. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/13304 |
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| Alves,Walison B.; Rolim,Glauco de S.; Aparecido,Lucas E. de O.. |
| ABSTRACT: Evapotranspiration (ET) is the main component of water balance in agricultural systems and the most active variable of the hydrological cycle. In the literature, few studies have used the forecast the day before via Artificial Neural Networks (ANNs) for the northern region of São Paulo state, Brazil. Therefore, this aimed to predict the reference evapotranspiration for Jaboticabal, the major sugarcane-producing region of São Paulo state. We used a historical series of data on average air temperature, wind speed, net radiation, soil heat flux, and daily relative humidity from 2002 to 2012, for Jaboticabal, SP (Brazil). ET was estimated by Penman-Monteith method. To forecast reference evapotranspiration, we used a feed-forward Multi-Layer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modeling; Multi-Layer Perceptron; Air temperature; Estimate. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601116 |
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| Ramalho,Werther P.; Jorge,Rafael F.; Baiocchi,Leandro B.; Peña,Alfredo P.; Pires,Ricardo A. P.. |
| The goal of this study was to assess the population structure of Pseudis bolbodactyla Lutz, 1925 using natural markings to identify individuals. Recruitment, survival, and population size estimations were obtained using the Jolly-Seber stochastic method. A total of 166 individuals were captured, and the striped, spotted, and dotted patterns that make their recognition possible were recorded. Of the specimens captured, 27 were recaptured, including some at pre and post-metamorphic stages. The estimate maximum population size was 52. The indices of survival and recruitment varied among samplings. Sexual dimorphism in size and in the operational sex ratio were detected. Despite the limited scope of our characterization of the P. bolbodactyla population, our... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibian; Capture-recapture; Cerrado; Photograph; Estimate. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600006 |
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| Vidal,Luiz Vítor Oliveira; Furuya,Wilson Massamitu; Martins,Elias Nunes; Xavier,Tadeu Orlandi; Michelato,Mariana; Graciano,Themis Sakaguti. |
| The objective of this study was to formulate mathematical models to estimate digestible protein in some animal feeds for tilapia. Literature results of the proximate composition of crude protein, ether extract, and mineral matter, as well as digestible protein obtained in biological assays, were used. The data were subjected to multiple linear stepwise backward regression. Path analysis was performed to measure the direct and indirect effects of each independent variable on the dependent one. To validate the model, the experience used data from independent studies and values obtained from a digestibility trial with juvenile Nile tilapia testing five meat and bone meals, using the Guelph feces collecting system and chromium oxide (III) as an indicator. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Estimate; Feed; Linear models. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600005 |
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