The aim of this study was to evaluate the physiological, zootechnical, and environmental benefits of the use of growth-promoting virginiamycin in the pirarucu diet. The research was conducted at the Carlos Eduardo Matiazze Fish Center, Federal University of Rondônia. In this study, 96 pirarucu fish were distributed in excavated nursery, divided into two treatment groups, control (0.0 mg kg−1) and treatment (75.0 mg kg−1) of feed with virginiamycin, with 8 replications in a completely randomized design. With virginiamycin being incorporated into commercial feed, for 107 days of cultivation, the fish were slaughtered with an average weight of 9.18 kg. Carcass weight, flesh, residues, and internal organs/guts were evaluated to calculate slaughter yields, Spearman’s correlation, and subsequently regression. For the quantification of micronuclei, a count of 1,000 cells per blade was determined. The means of the results obtained were contrasted by the Student’s t-test (α = 0.05). Virginiamycin did not cause oscillations in the limnological variables of the nursery but could reduce micronucleated erythrocytes. The average yields in carcass, flesh, and waste were 67.43, 53.4, and 43.14%, respectively. Virginiamycin provided strong correlations (ρ2) for better productive yields and lower slaughter residue. The hepatosomatic index indicated a strong relationship between liver weight and fat. Virginiamycin may be recommended for fish farming in pirarucu fattening because it contributes to the productive efficiency and sustainability of the fish farm system.
The aimed of the study was to evaluate the caloric value as a function of the proximal composition and correlate the selling price with the nutritional values of commercial cuts of tambaqui (Colossoma macropomum) and pirarucu (Arapaima gigas) in different weight classes. The sample collections were performed in two processing units located in the state of Rondônia, Brazil. Were 200 tambaquis in five weight classes were studied. And, were 77 pirarucus were studied in seven weight classes. The design was completely randomized, with processing carried out in triplicate. The Kruskal-Wallis test (α=0.05) was used to compare the averages and the Spearman correlation (ρ) between price and nutrients. The commercial cuts with the highest caloric value were the tambaqui filet (145.70 kcal/100g) and the pirarucu filet mignon (119.11 kcal/100g) (p<0.05). And the less caloric commercial cuts were steak of tambaqui (100.47 kcal/100g) and pirarucu loin 102.01 kcal/100g) (p<0.05). It was also observed that the variables caloric value and protein content did not correlate with the price of the kilo of fish for the different commercial cuts, which leads to infer that, possibly, the sensorial, market and cultural factors were responsible for the price variations. Regarding the caloric value according to the composition of the tambaqui, the Class 4 was the most efficient category for production and commercialization. And in the composition of the pirarucu, the Class 4 presented satisfactory values of proteins and lipids and a good percentage of mineral matter.
O estudo avaliou os custos e benefícios do programa de inseminação artificial (IA) na Região Central de Rondônia e sua evolução no período de 2011 até 2016. Dados foram fornecidos pela Entidade Autárquica de Assistência Técnica e Extensão rural do Estado de Rondônia (EMATER-RO) - Regional de Ji-Paraná-RO. Os dados foram registrados durante o Programa de Melhoramento Genético em Bovinos de Leite, por meio do Projeto Inseminar em 13 municípios, nos quais foram incluídas, 278 propriedades rurais de produção de leite. As variáveis utilizadas para mensuração da eficiência do programa foram: quantidade média de nitrogênio (N) líquido consumido, número de associações beneficiadas e número de produtores por município; número médio de vacas inseminadas e porcentagem de bezerros nascidos; porcentagem de bezerros machos e fêmeas; despesas e rentabilidade. O programa de IA durante o período de 2011 a 2016 apresentou lucratividade de R$ 195.639,17; chegando a valor médio de R$ 1.774.500,00; alcançados nas vendas de bezerros, com índice de 11 % em despesas e uma rentabilidade média de 89 %. Os valores obtidos nas vendas de bezerras reduziram no decorrer do período analisado, enquanto os custos se mantiveram estáveis. Estratégias para o manejo reprodutivo eficiente e conscientização das associações e produtores são necessárias na região para obtenção de melhores resultados.
O objetivo do trabalho foi avaliar a melhor frequência alimentar sobre a conversão alimentar aparente e o desempenho zootécnico de juvenis de tambaqui de cultivo. O estudo foi desenvolvido no Centro de Pesquisa em Piscicultura Carlos Eduardo Matiazze, Universidade Federal de Rondônia, Presidente Médici, Rondônia. Foram utilizados 225 juvenis de tambaqui, com peso inicial 595,46±19,71 g, distribuídos em 15 hapas em delineamento inteiramente casualizado. O estudo foi desenvolvido em cinco tratamentos de diferentes frequências de alimentação: fornecimento de ração uma vez ao dia (1XD), composto por três horários distintos, para comparar os três diferentes horários; fornecimento de ração duas vezes (2XD) e três vezes (3XD) ao dia. Foi fornecido ração extrusada contendo 28 % de proteína bruta a taxa alimentar de 1,8 e 1,4 %. As variáveis limnológicas mantiveram-se estáveis e dentro das médias recomendadas ao cultivo de tambaqui. Os valores de peso final e ganho de peso médio corporal, apresentaram médias de 1.043,08 e 450,59 g, respectivamente. Os tambaquis que receberam ração duas vezes ao dia, apresentam melhores resultados de conversão alimentar e de desempenho produtivo. Portanto, alimentar juvenis de tambaqui duas vezes ao dia, apesar de demandar menor mão de obra é o suficiente para manter a conversão alimentar aparente e o desempenho zootécnico adequados.
The aimed of this study was to evaluate the mineral composition in commercial cuts of tambaqui (Colossoma macropomum) and pirarucu (Arapaima gigas). Were compared to the minimum values of daily consumption of minerals recommended by the World Health Organization (WHO). The experimental design was completely randomized, with processing performed in triplicate. Data were submitted to ANOVA. If ANOVA appeared statistically significant (α=0.05), the means were compared by Tukey’s Test. There was a difference (p<0.05) between commercial cuts of the tambaqui for different minerals. Tambaqui ribs and band presented the highest values of total iron 1.08 ± 0.12 mg/100g compared to other commercial cuts. The mineral elements Na+, K+, Ca2+ and Mg2+ expressed the highest values for the tambaqui steak, 301.00 ± 80.58, 457.00 ± 129.33, 36.00 ± 4.36 and 46.90 ± 4.68 mg/100g, respectively. There was a difference (p<0.05) between commercial cuts of the pirarucu for different minerals. The mineral elements Total Iron, Na+, K+ and Ca2+ expressed the highest values for pirarucu loin, 0.80 ± 0.07, 406.00 ± 117.50, 529.30 ± 130.58 and 32.00 ± 5.12 mg/100g, respectively. However, Mg2+ expressed a higher value for pirarucu tail fillet 37.10 ± 4.99 mg/100g. The tambaqui steak and pirarucu loin were the cuts that best met the minimum needs for mineral supply.
Ocorrência de Ascaridia galli e Heterakis gallinarum em galinha-d'angola (Numida meleagris) no estado de Rondônia, BrasilOccurrence of Ascaridia galli and Heterakis gallinarum in Guinea Fowl (Numida meleagris) in the State of Rondônia, Brazil ABSTRACT Background: Parasitic diseases are among the problems that most affect birds. The Ascaridia spp. is one of the genera which is responsible for the main infections, and the Ascaridia. galli is the most frequent species found in birds. The Ascaridia spp. egg is oval and present a smooth shell which could be mistaken with the Heterakis gallinarum eggs, once they are the most frequent parasites in birds. Therefore, this case report describes the occurrence of Ascaridia galli and Heterakis gallinarum in a guinea fowl (Numida meleagris) feces and gut. Case: In January 2017, rain season in northern Brazil, a visit was performed to a free range avian breeding property in the municipality of São Miguel do Guaporé in the state of Rondônia, Brazilian Amazonian Region. The property breeds two chicken species: Gallus gallus domesticus and Numida meleagris as well as one quail species. The problem was related to the guinea fowl breeding which was composed by 50 adults and 45 young birds about two or three weeks old. All 45 young guinea fowl were presenting various clinical signs, which included: yellowish catarrhal diarrhea, isolation, loss of appetite, body weight, ruffled feathers, drooping wings and sternal prominence. All animals that presented the clinical signs as ruffled feathers, drooping wings and sternal prominence died on an average of 24 h and the mortality was of 65.9% (29/45). Subsequently, a three-week old bird corpse was necropsied, and it was observed that its intestines presented a large amount of endoparasites besides presenting thickening. As there were a lot of helminths, they were collected along with the intestinal content for examination. The parasitological examinations of the feces were performed by Willys Molay's technique. As a result of the fluctuation technique, were observed and identified large quantities of Heterakis gallinarum and Ascaridia galli eggs. The adult worms of H. gallinarum and A. galli were identified using dichotomous key. Discussion: Ascaridia galli and Heterakis gallinarum infection were reported in guinea fowl in a free range chicken breeding property in the municipality of São Miguel do Guaporé in the state of Rondônia, Brazilian Amazonian Region. Ascaridia galli and Heterakis gallinarum eggs have already been identified in free-range chickens (Gallus gallus domesticus) by flotation techniques, as Willys Mollay and Faust and they are the main species of helminths housed by chickens. However, these parasites are not commonly reported in guinea fowl worldwide, especially in the Numida meleagris species. Regarding necropsy, intestinal wall thickening is generally a common finding which has been reported in chickens, however it is not commonly reported in guinea fowl. Additionally, the presence of clinical signs of nematode parasitos...
Among the disturbances resulting from stress is cannibalism, in the confinement of swines, it is caused by suffering environmental disturbances. Therefore, the aimed of this study was to analyze the rates of condemnation of swine carcasses for cannibalism in the period from January to April 2020 in a slaughterhouse located in the Northern Mesoregion Mato-grossense - Brazil. Data were conducted using ANOVA and Tukey Test (α=0.05). The study of proportions was also carried out as a statistical basis to calculate the percentage of destinations and the total amount of condemned swine carcasses. The averages of the condemned, released and used carcasses show a statistical difference (p<0.05) between the months studied. The monthly averages were 112.25 condemned carcasses (64.25 released, 35 used conditionally and 13 destined for rendering). In the total of carcasses condemned for cannibalism, there were values of 57.28% for release, 31.18% for conditional use and 11.58% for rendering, with a higher incidence in March. The incidence of cannibalism can be considered low in relation to the number of animals slaughtered in a four-month period. However, the economic impact must be taken into account, because the loss due to total conviction and conditional use cause significant financial losses. In addition, uncomfortable production environments have factors closely related to cannibalism, being difficult to control after the outbreak begins. Therefore, the incidence of cannibalism can influence the final carcass yield of swines slaughtered in the finishing phase.
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