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1.
Arq. bras. med. vet. zootec ; 62(2): 453-459, abr. 2010. tab
Article in Portuguese | LILACS | ID: lil-551846

ABSTRACT

Determinou-se a composição de partes da carcaça - pescoço, dorso e pés de aves -, e sua digestibilidade, usadas para cães nas formas crua e cozida. Os animais, pesados antes e depois do período experimental, foram alimentados uma vez ao dia, com livre acesso ao alimento por uma hora. Cada animal recebeu aproximadamente 50g alimento/kg de peso. As fezes, coletadas diariamente, foram pesadas e congeladas até a realização das análises bromatológicas. Os pés apresentaram os maiores valores de proteína bruta (PB) e matéria mineral (MM), o pescoço, o maior valor de energia bruta (EB), e o dorso, os de matéria seca (MS), matéria orgânica (MO) e extrato etéreo (EE). O cozimento não alterou a composição dos alimentos, entretanto os alimentos cozidos apresentaram teores menores em PB e maiores em EE. Os coeficientes de digestibilidade da MO e da PB do pescoço aumentaram significativamente quando este foi cozido, e os valores de energia metabolizável (EM) e energia digestível (ED) diminuíram. O cozimento do dorso resultou em redução de EM e ED. Os coeficientes de digestibilidade da MS, MO e PB e a ED e EM do pé foram significativamente maiores para os pés cozidos.


In order to use an ingredient to formulate dog foods, it is ideal to the industry to know its properties including the digestibility. So, this work studied the chemical composition and the digestibility of chicken parts used to feed dogs, since they are used frequently by the dog food industry. The ingredients were raw and cooked neck, back, and feet. The animals were weighted before and after the experimental period and food was served once a day. The food was weighted before and after being served. Each animal consumed approximately 50g food/kg body weight. The feces were collected daily and freezed as well as the food until the bromatological analyses procedures. The feet had the highest values for crude protein (CP) and mineral content (MC); while the back, the highest values for dry matter (DM), organic matter (OM), and fat. Cooking had no significant effect on chemical composition of the ingredients. Considering the digestibility coefficient, OM and CP of neck had a significant increase when it was used in the cooked form; but, the metabolizable energy (ME) and the digestible energy (DE) values considerably decreased. For the back, the heat treatment resulted in a significant reduction of ME and DE and the digestibility coefficients of DM, OM, and CP, and ME, and DE of the feet were higher using the same treatment.


Subject(s)
Animals , Food Analysis/methods , Birds , Dogs
2.
Arq. bras. med. vet. zootec ; 60(6): 1388-1398, dez. 2008. tab
Article in English | LILACS | ID: lil-506548

ABSTRACT

The effect of dietary conjugated linoleic acid (CLA) in association with two vegetable oil sources on the fatty acids of meat and giblets of broiler chickens was evaluated. Two hundred 21-day-old broiler chickens were distributed in a completely randomized factorial design 2 x 5 (two oil sources, soybean or canola oil; and five levels of CLA, 0.0, 2.5, 5.0, 7.5, and 10.0g/kg). The addition of CLA to the diet resulted in an increase (P<0.05) in CLA deposition in the analyzed tissues. CLA supplementation also reduced (P<0.05) the rate of polyunsaturated to saturated fatty acids in thigh, breast, heart, and gizzard. There was interaction of CLA x oil source (P<0.05). The intake of soybean oil, associated with increasing CLA, resulted in an increase in lipid deposition in edible portions as observed by an increase in the overall content of fatty acids, including CLA, while the use of canola oil, associated with increasing CLA in the diet, resulted in a decrease in lipid content in edible portions, specifically regarding that of saturated fat (P<0.05) in breast meat and liver and in the content of monounsaturated fatty acids (P<0.05) in thigh, breast, liver, and gizzard.


Avaliou-se o efeito da suplementação de ácido linoléico conjugado (CLA) associado com duas fontes de óleo na dieta de frangos de corte sobre a composição de ácidos graxos das vísceras e da carne de aves. Duzentos frangos de corte, machos, com 21 dias de idade, foram distribuídos em delineamento inteiramente ao acaso, em arranjo fatorial 2 x 5 (duas fontes de óleo, soja e canola e cinco níveis de CLA, 0,0, 2,5, 5,0, 7,5 e 10,0g/kg). A adição de CLA na dieta resultou em aumento (P<0,05) de sua deposição na carne e nas vísceras de aves. Foi observado decréscimo (P<0,05) na taxa de poliinsaturados:saturados nas carnes da coxa e do peito, no coração e na moela com a suplementação de CLA. Houve interação (P<0,05) CLA x fonte de óleo. O uso de teores crescentes de CLA na dieta contendo óleo de soja na dieta resultou em aumento (P<0,05) no conteúdo lipídico. O contrário foi verificado com a utilização de óleo de canola, especificamente no conteúdo de ácidos graxos saturados (P<0,05) na carne do peito e no fígado e de monoinsaturados (P<0,05) nas carnes do peito e da coxa, fígado e moela.


Subject(s)
Animals , Male , Fatty Acids/analysis , Fatty Acids/chemistry , Linoleic Acids, Conjugated/administration & dosage , Linoleic Acids, Conjugated/pharmacology , Body Composition , Dietary Supplements , Glycine max , Meat , Plant Oils/administration & dosage , Plant Oils/metabolism , Poultry
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