Fat Deposition in Broilers: Effect of Dietary Energy to Protein Balance, and Early Life Caloric Restriction on Productive Performance and Abdominal Fat Pad Size

Abstract

The effect of dietary energy to protein balance, and early life caloric restriction on abdominal fat pad development in the male broiler chicken was studied. Dietary energy concentration had no significant (P s 0.05) effect on abdominal fat pad size, although decreasing the calorie.protein ratio of the diet resulted in a significant (P £ 0.05) reduction in the proportion of this tissue in the body. Reducing the calorie: protein ratio from a level considered optimum, by the addition of feather meal to the diet was equally as effective in reducing fat pad size as was the addition of a higher quality protein as exemplified by soybean meal plus DL-methione. Restricting the caloric intake of broilers in the 0-3 week growing period by the use of an ad libitum fed low energy diet (2233 kcal. M.E./kg.) had no significant (P s 0.05) effect on fat pad development. It is suggested that the degree of calorie restriction was not of sufficient magnitude to influence adipocyte hyperplasia. These results are discussed in relation to findings with other avian and mammalian species.

Yüksek Kalorili Bıldırcın Karma Yemlerine Deve Dikeni (Silybum marianum) Tohumu İlavesinin Yumurta Verimi, Yumurta Kalite Özellikleri, Kuluçka Randımanı ve Oksidatif Stres Parametreleri Üzerine Etkisi

“…Daily feed consumption in study groups varied between 28.78 g and 30.51 g, and the difference between the groups was statistically insignificant (Table 3). While feed consumption was expected to decrease depending on energy content in groups consuming high calorie diet Griffiths et al [20] similar results were achieved in all groups of this study and thus it was determined that quails use the extra energy they consumed for egg production and accordingly egg production increased in parallel with energy consumption. Furthermore, the fact that they used extra energy, they produced due to extra-caloric and extrametabolic effects of oils, for egg production did not caused a significant difference in feed consumption also in these groups.…”

Influence of post-hatch starvation on broiler chick’s productivity

“…The effect of these enzymes on feed digestion and absorption are due to duration of feed which remain in GIT [19]. This was confirmed by [20]. The percentage mortality was high in the treatments with increase feed holding time (Table 2).…”

Níveis de Energia e Relações Energia: Proteína para Frangos de Corte de 22 a 42 dias de Idade

“…Este resultado é diferente daquele obtido por GRIFFITHS et al (1977) A conversão alimentar não foi afetada pela interação (P>0,10), mas sim pelos efeitos principais da relação EM:PB e do nível de energia (P<0,05). As melhores conversões foram obtidas com a ração contendo o nível alto de energia e a menor relação EM: PB (Tabela 2).…”

“…José Humberto Vilar da Silva 1 , Luiz Fernando Teixeira Albino 2 , Adriana Helena do Nascimento 3 56 dias de idade, GRIFFITHS et al (1977) não observaram efeito sobre o ganho, mas o consumo e a gordura abdominal aumentaram em termos absolutos e a conversão alimentar piorou. Redução significativa no ganho de peso e pior conversão (NASCIMENTO et al, 1998), além de aumentos significativos nas porcentagens de gordura abdominal e extrato etéreo e queda no teor de proteína da carcaça , foram observadas em frangos, na fase inicial, alimentados com rações contendo relações energia:proteína, que passaram de 125,0 para 136,9 e 151,5.…”