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 estudo teve como objetivo analisar a viabilidade econômica de uma piscicultura localizada no município de Urupá-RO, por meio dos indicadores econômicos, com ênfase no período de retorno de capital (Payback), valor presente líquido (VPL) e taxa interna de retorno (TIR). Os custos com ração para engorda representaram 81,06%. O empreendimento obteve Payback de cinco anos e seis meses, e uma média de índice de lucratividade de 46,18%. No entanto, a taxa interna de retorno (TIR) expressou-se acima da taxa mínima de atratividade chegando ao sexto ano com 17,0% e VPL positivo para o sexto ano de cultivo de R$ 21.098,41. As projeções realizadas demonstram viabilidade operacional ao longo do tempo. Portanto, a piscicultura possui viabilidade econômica para investimento, porque o valor empregado na atividade é recuperado, com potencial de gerar excedente e se manter exequível ao longo do tempo.
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.
It is important to know the nutritional composition of the fish, especially the nutritional value of the commercial cuts most consumed by the population. The aimed of this study was to evaluate the chemical composition of commercial tambaqui (Colossoma macropomum) cuts in different classes of body weight. The sample collections were carried out in processing units in two municipalities in the state of Rondônia, Brazil. The Data on 200 fish were recorded, with weight ranging from 1000 to 4700 g. Five classes of body weight were established, class 1 - below 1.2 kg; class 2 - from 1.21 to 1.8 kg; class 3 - from 1.81 to 2.4 kg; class 4 - from 2.41 to 3.5 kg; class 5 - over 3.5kg. The commercial cuts were lyophilized and intended for chemical analysis. The Kruskal-Wallis test (α=0.05) was used to compare the averages. The composition of commercial cuts was different in weight classes (p<0.05). The filet presented more representative values in mineral matter, crude protein and total lipids and lower humidity for class 4 (from 2.41 to 3.5 kg). The classes 1 and 5 (below 1.2 and over 3.5 kg) were different (p<0.05) in relation to the lipid and moisture content in the commercial filet and rib cuts. The tambaqui steak in class 4 have a higher lipid content compared to the average of the lightest body weight classes, 9.99 vs 4.50%, in addition to having a lower moisture content (p<0.05). The tambaqui band was different (p<0.05) in relation to nutritional components between body weight classes, with class 4 being richer in minerals, crude protein and lipids in dry matter. Therefore, the class 4 was the most efficient (p<0.05) for production and commercialization. Because the tambaquis with body weight between 2.4 to 3.5 kg stood out in relation to the nutritional components in the different commercial cuts.
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...
With the intensification of fish farming, the amount of residues also increased. One of the by-products generated is leather. However, several factors influence its quality, among them, the types of tanning used. Paiche (Arapaima gigas) is the largest freshwater fish in the world, and therefore has great potential in the use of leather, in addition to being one of the most cultivated fish in the Rondônia state. The aimed was to evaluate the physicomechanical resistance, histological and morphological aspects in different directions of the fibers of the paiche to evaluate the tanning with chromium oxide and vegetable tannin. Paiches with an average weight of 12.0 kg were used, skins were made and tanned using chromium and vegetable tannin as techniques. After tanning, 20 specimens were removed in longitudinal, transverse and diagonal directions to the fish body, to determine resistance in dynamometer and leather for histological analysis, scanning electron microscopy and physical-chemical analysis. The average thickness of the specimens of the leathers ranged 1.79mm to 2.82mm, in addition, there was no interaction between the type of tanning agent and the directions obtained for strength, traction and elongation. Regarding the progressive tearing test, there was also no interaction effect. However, the defined factors had relevant differences for the maximum and average amount applied, and the leathers tanned with vegetable tannin expanded to larger dimensions 110.19 and 85.52 N. According to the images obtained by histology and scanning microscopy, they presented that in the longitudinal and transverse direction the collagen fibers are presented in layers parallel to the leather surface and in the diagonal direction the interlacing is more intense, that is, in addition to the overlapping layers intercalated thinner, close to the surface, fiber bundles can also be seen crossing each other. It is concluded that leathers tanned with vegetable tannin have less resistance than leathers tanned with chromium salts for traction to rupture and greater resistance to tear.
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