Resumo -O objetivo deste trabalho foi avaliar o desempenho, as variáveis fisiológicas e o comportamento de cinco linhagens de frangos de corte caipiras criadas em sistema semi-intensivo, em região de clima quente. Utilizaram-se 400 aves, com idade inicial de 35 dias, em cinco tratamentos representados pelas linhagens caipiras: Pescoço Pelado, Vermelho Pesadão, Carijó, Master Griss e Colorido. Utilizou-se um delineamento inteiramente casualizado, com quatro repetições e 20 parcelas. Avaliaram-se desempenho (ganho de peso, consumo de ração e conversão alimentar), temperatura retal, frequência respiratória e comportamento. Não houve diferenças significativas entre as linhagens para desempenho e variáveis fisiológicas. Todas as linhagens apresentaram desconforto térmico e, com base nos comportamentos observados, notou-se uma adaptação à alta temperatura. As linhagens Pescoço Pelado, Vermelho Pesadão, Carijó, Master Griss e Colorido podem ser utilizadas para a criação em sistema semi-intensivo, em região de clima quente.Termos para indexação: ambiência, avicultura alternativa, comportamento, desempenho. Strains of free-range broilers reared in semi-intensive system in a hot climate regionAbstract -The objective of this work was to evaluate the performance, physiological traits, and behavior of five lines of free-range broilers reared in a semi-intensive system in hot climate region. Four hundred birds, with an initial age of 35 days, were used in five treatments represented by the free-range lines: Pescoço Pelado, Vermelho Pesadão, Carijó, Master Griss, and Colorido lines. A completely randomized design with four replicates and 20 plots was used. Performance (weight gain, feed intake, and feed conversion), rectal temperature, respiratory frequency, and behavior were evaluated. There were no significant differences between the lines for performance and physiological variables. All lines showed thermal discomfort and, based on their behaviors, an adaptation trend to hot climate was noted. The Pescoço Pelado, Vermelho Pesadão, Carijó, Master Griss, and Colorido lines can be reared in semi-intensive systems in hot climate region.
O objetivo foi avaliar a variação anual das características morfológicas de pelame de vacas mestiças Holandesas x Gir, ½ e ¾ de Holandês da região de Salinas - Minas Gerais. As características morfológicas do pelame estudadas foram: espessura da capa, comprimento médio dos pelos e densidade numérica. A coleta de pelos foi realizada em cada estação climática (primavera, verão, outono e inverno). A caracterização climática das estações do ano foram obtidas a partir dos dados disponibilizados pelo Instituto Nacional de Meteorologia (Inmet). Os dados para as características morfológicas do pelame foram submetidos à análise de variância seguindo um delineamento inteiramente casualizado em esquema fatorial (dois graus de sangue e quatros estações climáticas). Encontrou-se efeito de estação do ano, demonstrando que o pelame das vacas mestiças se ajusta com as variáveis ambientais. E o comprimento e número de pelos/cm² apresentaram-se maiores nos animais ¾ Holandês. Conclui-se que os animais mestiços estudados possuem pelame curto, pouco denso e bem assentado, principalmente no verão. Os animais ½ Holandês apresentaram pelame menos denso e mais curto que os animais ¾ Holandês.
The physiological parameters and the productive performance of free-range broilers submitted to installations with different materials of tile composition were evaluated. 320 male broilers of the Vermelho Pesadão lineage were used, with an initial age of 35 days, distributed among the following treatments: 1) Fiber cement tile painted white on the outside; 2) Cardboard tile coated with double-sided canvas -black for the interior and white for the exterior; 3) Tetra Pak® box tile; 4) Tile of Tetra Pak® boxes covered with PET bottles. A completely randomized design was used, with 4 replicates per treatment and 20 broilers per experimental unit. The climatic environment was evaluated daily at 8, 10, 12, 14 and 16 hours. The productive and physiological parameters were evaluated every 7 days, the last ones being collected at 9 and 15 hours. In the afternoon, the highest values of air temperature and black globe temperature index and humidity were recorded, regardless of the materials evaluated. Fiber cement tiles and cardboard tiles coated with double-sided canvas showed the lowest values of climatic variables. There was no difference between the types of tile for the variables of productive performance and physiological parameters. It was concluded that the fiber-cement tiles painted white on the outside, and the cardboard coated with light canvas on the outside provided a better thermal environment inside the aviaries, which can be indicated for use in shelters for the creation of free-range broilers.
The objective was to determine zoometric indices, correlate, and predict body weight based on the biometric measurements of F1 Dorper × Santa Inês (F1 D × SI) ewes created extensively. Were 25 F1 D × SI sheep monitored, with ages varying from 2 to 9 months. Body weight, thoracic perimeter, belly perimeter, body length, withers height, rump height, rump width, and rump length were measured on a monthly basis and zoometric indices were estimated from them. Descriptive data analysis, Pearson's correlation, and regression analysis were performed. The biometric measurements and zoometric indices of F1 D × SI ewes indicate an animal of aptitude for cutting, with good conformation. In addition, they demonstrate favorable aspects for reproduction, a fundamental characteristic in the selection of matrices. Body weight has a high and positive correlation for all characteristics analyzed, with values ranging from 0.74 of the rump length to 0.88 of the thoracic perimeter. The regressions for all biometric measurements were highly significant (P <0.0001) with an emphasis on the thoracic perimeter that has the highest coefficient of determination (R² = 0.77), the other measures presented below 0.70. It was concluded that F1 Dorper × Santa Inês ewes have characteristics for meat production and for reproduction. Also, of the biometric measurements, the thoracic perimeter can be used to predict the body weight of F1 Dorper × Santa Inês ewes.
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