959 resultados para Coturnix coturnix japonica
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Zootecnia - FCAV
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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O presente trabalho teve como objetivos relacionar o desempenho sexual das codornas japonesas com o canto, nos machos. Foi determinado o perfil de comportamento sexual das codornas e foi constatado que os machos apresentam diferenças individuais conspícuas entre os grupos de maus e bons copuladores. Foi descrito também a taxa de vocalização e determinados os parâmetros acústicos, entretanto mostraram-se semelhantes entre os grupos testados, apesar de apresentarem diferenças na estrutura sonográfica. Houve diferenças no índice gonadossomático entre os dois perfis, porém não se mostraram significativos. Não houve correlação entre o desempenho sexual de machos de codorna japonesa e a taxa de vocalização, apesar de uma tendência dos bons copuladores cantarem mais freqüentemente
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O alumínio está presente de forma marcante em nosso cotidiano, com várias possibilidades de contaminação para o ser humano e animais, através da ingestão de alimentos ou aditivos presentes nos alimentos ou, também, através do uso de medicamentos. Por apresentar uma forte carga elétrica, um forte poder de polarização e características similares com elementos da hidroxiapatita, o alumínio age como um competidor de nutrientes na matriz óssea, Por isso, ele pode ser causa danos à saúde dos seres vivos, como a osteoporose. Diante disso, a presente pesquisa teve como objetivos estudar a influência de diferentes níveis de alumínio na dieta de codornas poedeiras, sobre as características físicas e químicas de seus ossos. A densidade e a porosidade óssea foram determinadas pelo método de imersão em água, utilizando o princípio de Arquimedes. Os resultados obtidos mostraram que concetrações até 20 mg de alumínio por kg de ração fornecida causa uma diminuição na densidade óssea e volta a aumentar para concetrações maiores que este limiar. A porosidade óssea, segue o inverso da densidade. Ela aumenta com concetrações até 20 mg de alumínio por kg de ração fornecida e volta a diminuir para concetrações menores
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The objective of this study was to estimate growth parameters of carcass components (wing, thighs and drumsticks, back and breast) and organs (heart, liver, gizzard and gut) in males and females of one meat-type quail strain (Coturnix coturnix coturnix) and two laying strains (Coturnix coturnix japonica) designated either yellow or red.A total of 1350 quail from 1 to 42d old were distributed in a completely randomised design, with 5 replicates of each strain. The carcass component weights and body organs were analysed weekly and evaluated using the Gompertz function; growth rates were evaluated through derivative equations.The meat-type strain presented the highest growth rates in carcass components and organs. Across strains, females showed the highest weight of internal organs at maturity compared to males.Females had greater growth potential in breast, wings and back than males for both yellow and red laying quail.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Vitamin A deficiency is a serious public health problem in developing countries, and it causes death and blindness among children in the developing countries. The fortification of food could be an important source of vitamins to control deficiency. 60 Coturnix coturnix japonica quails were used in a randomized design with duration of seven weeks. The birds were assigned into five treatments with four repetitions. The objective was to evaluate the influence of the supplementation with different levels of retinyl palmitate (2,000 IU, 4,000 IU, 8,000IU and 16,000 IU) in quails under the levels of retinyl in egg yolks. The method used to dose retinyl in yolks of quail eggs was High Performance Liquid Chromatography and the enzymatic method to quantify the cholesterol concentration. The weight and production of eggs was significantly modified by the supplementation with retinyl in the birds. The results showed a gradual increase in the incorporation of retinyl in the egg yolk as a response to the supplementation, reaching values 384% higher than the control values. By the end of the supplementations a significant reduction in the concentrations of retinyl in the eggs yolk was observed. The most lasting supplementations were with 8,000 IU and 16,000 IU which lasted for three weeks. The cholesterol content in eggs was not significantly modified. The consumption of one egg enriched with 16000UI of retinol palmitate in the present study, by day, would probably reach 10 and 7,3% of the daily recommendations of this micronutrient for children of 1 to 3 years of age, and for 4 to 8 years, respectively. The nutritional value of eggs, related to the vitamin A, can be improved by supplementation of quails
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Vitamin A deficiency is a serious public health problem in developing countries, and it causes death and blindness among children in the developing countries. The fortification of food could be an important source of vitamins to control deficiency. 60 Coturnix coturnix japonica quails were used in a randomized design with duration of seven weeks. The birds were assigned into five treatments with four repetitions. The objective was to evaluate the influence of the supplementation with different levels of retinyl palmitate (2,000 IU, 4,000 IU, 8,000IU and 16,000 IU) in quails under the levels of retinyl in egg yolks. The method used to dose retinyl in yolks of quail eggs was High Performance Liquid Chromatography and the enzymatic method to quantify the cholesterol concentration. The weight and production of eggs was significantly modified by the supplementation with retinyl in the birds. The results showed a gradual increase in the incorporation of retinyl in the egg yolk as a response to the supplementation, reaching values 384% higher than the control values. By the end of the supplementations a significant reduction in the concentrations of retinyl in the eggs yolk was observed. The most lasting supplementations were with 8,000 IU and 16,000 IU which lasted for three weeks. The cholesterol content in eggs was not significantly modified. The consumption of one egg enriched with 16000UI of retinol palmitate in the present study, by day, would probably reach 10 and 7,3% of the daily recommendations of this micronutrient for children of 1 to 3 years of age, and for 4 to 8 years, respectively. The nutritional value of eggs, related to the vitamin A, can be improved by supplementation of quails
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La hibridación entre especies es un fenómeno ampliamente extendido que puede tener consecuencias en la conservación de la biodiversidad. En el presente artículo se hace una revisión del problema de conservación derivado de la suelta de codornices de granja en poblaciones silvestres de codorniz común (Coturnix coturnix). Estas codornices de granja han resultado ser híbridos de codorniz común y codorniz japonesa (Coturnix japonica). Si no existen mecanismos de aislamiento reproductor, estas sueltas favorecerían la introgresión de genes de codorniz japonesa en las poblaciones de codorniz común; ello conllevaría que se produjera un “enjambre de híbridos” y la sedentarización de las poblaciones de codorniz, lo que comportaría muy probablemente su disminución en Europa. Esta amenaza es real, al haberse demostrado que no hay mecanismos de aislamiento reproductor, ni pre-cigóticos, ni post-cigóticos, ni ecológicos. Sin embargo, datos empíricos sugieren que a pesar de ello no se produce el temido “enjambre de híbridos”, sugiriéndose una mortalidad diferencial entre las dos especies como una posible explicación. Finalmente, se sugieren algunas medidas de gestión derivadas de la situación actual, entre las que destacaría un control genético que certifique el origen de los individuos criados en granja y la prohibición de efectuar sueltas de codornices japonesas o híbridos.