18 research outputs found
Feeding behavior of ram lambs in the feedlot receiving diets without roughage in different amounts
This study aimed to evaluate the feeding behavior of Santa Inês ram lambs in the feedlot receiving diets without roughage in different amounts. Ten castrated Santa Inês male sheep with an average body weight of 20 kg and an average age of four months were used in the experiment. The following treatments were tested: T1 - animals receiving a diet ad libitum (FS100); T2 - animals receiving 95% of the amount of feed supplied in T1 (FS95); T3 - animals receiving 90% of the amount supplied in T1 (FS90); T4 - animals receiving 85% of the amount supplied in T1 (FS85); and T5 - animals receiving 80% of the amount supplied in T1 (FS80). A Latin square (5 × 5) design was adopted, using two simultaneous squares. The times spent feeding, ruminating, performing other activities; the total chewing time; and the number of periods spent feeding and on other activities changed with the reduction in the amount of feed supplied (P<0.05). Number of rumination chews per cud, time per cud, chewing speed, and time per rumination chew did not differ with the reduction of feed supply (P>0.05). Reducing the amount of feed provided to ram lambs consuming diets without roughage changes their feeding behavior.This study aimed to evaluate the feeding behavior of Santa Inês ram lambs in the feedlot receiving diets without roughage in different amounts. Ten castrated Santa Inês male sheep with an average body weight of 20 kg and an average age of four months were used in the experiment. The following treatments were tested: T1 - animals receiving a diet ad libitum (FS100); T2 - animals receiving 95% of the amount of feed supplied in T1 (FS95); T3 - animals receiving 90% of the amount supplied in T1 (FS90); T4 - animals receiving 85% of the amount supplied in T1 (FS85); and T5 - animals receiving 80% of the amount supplied in T1 (FS80). A Latin square (5 × 5) design was adopted, using two simultaneous squares. The times spent feeding, ruminating, performing other activities; the total chewing time; and the number of periods spent feeding and on other activities changed with the reduction in the amount of feed supplied (P<0.05). Number of rumination chews per cud, time per cud, chewing speed, and time per rumination chew did not differ with the reduction of feed supply (P>0.05). Reducing the amount of feed provided to ram lambs consuming diets without roughage changes their feeding behavior
DESEMPENHO ZOOTÉCNICO DE JUVENIS DE TILÁPIAS DO NILO (Oreochromis niloticus) ALIMENTADOS COM CEPAS PROBIÓTICAS E SUBMETIDOS A DESAFIO SANITÁRIO
O surgimento de doenças ocasionadas pelo estresse durante o cultivo de juvenis vem tornando-se comum devido à intensificação dos sistemas de produção, ocorrendo elevada mortalidade e prejuízos econômicos ao produtor. Mediante esse contexto, os probióticos que são um conjunto de micro-organismos vivos, estão sendo utilizados devido à sua capacidade de estabelecer-se e multiplicar-se no intestino do hospedeiro e promover o equilíbrio da microbiota, contribuindo com a sanidade e o desempenho dos peixes principalmente nas primeiras semanas de vida. Objetivou-se avaliar o desempenho de juvenis de tilápias do Nilo alimentados com cepas probióticas e submetidos a desafio sanitário. Foram utilizados 180 juvenis, distribuídos em delineamento inteiramente casualizado, com três tratamentos, quatro repetições e 15 peixes como unidade experimental. Os tratamentos foram: T1 - peixes cultivados em água limpa sem o uso de probiótico; T2 - peixes cultivados em água sob desafio e sem o uso de probiótico e T3 - peixes cultivados em água sob desafio e com o uso de probiótico. Não houve efeito significativo (P>0,05) nos parâmetros de desempenho zootécnico, no consumo de ração e sobrevivência. A utilização de probiótico na ração não mostrou-se hábil para proporcionar melhorias no desempenho, consumo de ração e na sobrevivência de juvenis de tilápias do Nilo no período de 30 dias de cultivo. Palavras-chave: dejetos de suínos; ganho de peso; piscicultura; probiótico
AVALIAÇÃO ECONÔMICA DO FARELO DE BABAÇU NA DIETA DE TILÁPIA DO NILO
The use of alternative foods to replace traditionally used foods can be a viable alternative to reduce costs in the formulation of fish feed. Babassu (Orbygnia speciosa) has emerged as an alternative to replace some ingredients that burden the diet. The objective was to evaluate the economic viability of the inclusion of babassu meal in replacement of soybean meal in the diet for Nile tilapia. 240 Nile tilapia fingerlings were used, which were distributed in 16 water tanks of 500 liters, in a completely randomized design, with 4 treatments and 4 replications. The treatments were represented by the inclusion of babassu in the diet: T1 with 0% (not including babassu); T2 with 2.5% (25% inclusion), T3 with 5% (50% inclusion), and T4 with 7.5% (75% inclusion). The experiment lasted 60 days. There were no statistical differences (p>0.05) in relation to the economic variables. However, it was observed that the price per kg of the ration of the treatment without the inclusion of babassu is equal to the treatment with the inclusion of 7.5% of babassu. Demonstrating that the replacement of babassu by soybean meal is economically viable, considering the large-scale feed production. It is concluded that the use of 75% inclusion of babassu meal in replacement of soybean meal in diets for tilapia up to 60 days of cultivation was economically viable.A utilização de alimentos alternativos para substituir os tradicionalmente utilizados pode ser uma alternativa viável para reduzir custos na formulação de rações para peixes. O babaçu (Orbygnia speciosa) vem surgindo como uma alternativa para substituição de alguns ingredientes que oneram a alimentação. Objetivou-se avaliar a viabilidade econômica da inclusão do farelo de babaçu em substituição ao farelo de soja em dieta para tilápia do Nilo. Foram utilizados 240 alevinos de tilápia do Nilo, os quais foram distribuídos em 16 caixas d’água de 500 litros, em um delineamento inteiramente casualizado, com 4 tratamentos e 4 repetições. Os tratamentos foram representados pela inclusão de babaçu na dieta: T1 com 0% (a não inclusão de babaçu); T2 com 2,5% (a inclusão de 25%), T3 com 5% (a inclusão de 50%) e T4 com 7,5% (a inclusão de 75%). O experimento teve a duração de 60 dias. Não foram observadas diferenças estatísticas (p>0,05) em relação as variáveis econômicas. Porém foi observado que o preço do kg da ração do tratamento sem inclusão de babaçu é igual ao tratamento com a inclusão de 7,5% de babaçu. Demonstrando que a substituição do babaçu pelo farelo de soja é economicamente viável, pensando na produção de ração em larga escala. Conclui-se que a utilização de 75% de inclusão de farelo de babaçu em substituição ao farelo de soja em rações para tilápias do Nilo criadas durante 60 dias foi economicamente viável
Ichthyometry and electrical bioimpedance analysis to estimate the body composition of tambatinga
Produção e qualidade de tomates cereja fertirrigados com água residuária da piscicultura
The aim of this work was to evaluate the production and the quality of fertirrigated cherry tomatoes with pisciculture wastewater with and without probiotics. The experiment was conducted in pots, under ambient conditions protected by 50% sombrite. The experimental design was a completely randomized design with four treatments and four replicates, the experimental unit consisting of thirty-two plants. Four water slides were tested: water; water from fish farms
without the use of probiotics; water with probiotic and probiotic pisciculture wastewater. Probiotic addition was performed every 48 hours, with 0,5 g of probiotic containing at least 5x109 billion colony forming units per viable gram for every 8 L of water, each plant receiving 1 L of water manually in the morning. The soil used in the experiment to fill the vessels was classified as a NEOSOLO QUARTZARENIC dystrophic sandy texture caatinga stage, mixed with organic compound. The
results showed that there was no difference between treatments for yield, number of fruits, fruit weight and pH. The treatment of water with probiotic was the one that presented lower acidity and better relation SST / ATT. The reuse of fish water with and without addition of the probiotic for fertirrigation of the cherry tomato crop did not interfere in the fruit production.Objetivou-se avaliar a produção e a qualidade de tomates cereja fertirrigados com água residuária da piscicultura com e sem adição de probióticos. O experimento foi conduzido em vasos, sob condições de ambiente protegido por sombrite 50%. O delineamento experimental foi o inteiramente casualizado com quatro tratamentos e quatro repetições, sendo a unidade experimental constituída por trinta e duas plantas. Foram testados quatro lâminas de água: água; água residuária da piscicultura sem o uso de probiótico; água com probiótico e água residuária da piscicultura com probiótico. A adição de probiótico foi realizada a cada 48 h, sendo 0,5 g de probiótico contendo no mínimo 5x109 bilhões de unidades formadoras de colônia por grama viável para cada 8 L de água, cada planta recebia 1 L de água manualmente no período da manhã. O solo utilizado no experimento para preenchimento dos vasos é classificado como um NEOSSOLO QUARTZARÊNICO distrófico textura arenosa fase caatinga litorânea, misturado com composto orgânico. Os resultados mostraram que não houve diferença entre os tratamentos para produção, número de frutos, peso de frutos e pH, o tratamento de água com probiótico foi o que apresentou menor acidez e melhor relação SST/ATT. O reuso da água da piscicultura com e sem adição do probiótico para fertirrigação da cultura do tomate cereja não interferiu na produção dos frutos
Feeding behavior of ram lambs in the feedlot receiving diets without roughage in different amounts
This study aimed to evaluate the feeding behavior of Santa Inês ram lambs in the feedlot receiving diets without roughage in different amounts. Ten castrated Santa Inês male sheep with an average body weight of 20 kg and an average age of four months were used in the experiment. The following treatments were tested: T1 - animals receiving a diet ad libitum (FS100); T2 - animals receiving 95% of the amount of feed supplied in T1 (FS95); T3 - animals receiving 90% of the amount supplied in T1 (FS90); T4 - animals receiving 85% of the amount supplied in T1 (FS85); and T5 - animals receiving 80% of the amount supplied in T1 (FS80). A Latin square (5 × 5) design was adopted, using two simultaneous squares. The times spent feeding, ruminating, performing other activities; the total chewing time; and the number of periods spent feeding and on other activities changed with the reduction in the amount of feed supplied (P0.05). Reducing the amount of feed provided to ram lambs consuming diets without roughage changes their feeding behavior
Whole scrapings of cassava root in diets for broilers from 1 to 21 days of age
The study was conducted to evaluate the effect of including whole cassava root scrapings (WCS) in diets of broilers on performance and the metabolizability of dry matter, crude protein, and gross energy and on nitrogenous balance. Four hundred female and 100 male broilers from Ross strain were used in the performance and metabolism studies, respectively. In both studies, broilers were allotted in completely randomized block design with five treatments and four replicates. The experimental unit was represented for twenty birds per box for performance study and five birds per metabolic cage for metabolism study. The treatments consisted of diets containing 0, 5, 10, 15, and 20% WCS inclusion. Up to 5.1% WCS can be included in the diet of broilers from 1 to 21 without compromising feed conversion and productive efficiency index. Dry matter, crude protein, and gross energy metabolizability and the nitrogen balance of the diets are not influenced by the inclusion of whole cassava root scrapings up to 20% in diets of broilers from 1 to 21 days of age