Abstract
One experiment was carried out to study the amylase activity in the small intestine (jejunum and ileum) of rabbits from litters maintained on different feeding patterns. Two hundred White New Zealand rabbits were analyzed, out of which 40 35- days-old rabbits, 80 50-days-old rabbits and 80 70-days-old rabbits were slaughtered. To modulate the pattern of feed and milk intake before weaning, the litters were modulated for eight young rabbits until 16 days old. From 16 days until weaning, they were submitted to low or high milk availability, litters maintained with four or eight young rabbits receiving diets containing normal or high starch level. The animals were distributed in a factorial design 2x2x2 (two milk intake patterns versus two starch levels in the diets before weaning versus two starch levels in the diets after weaning). The results showed that litters maintained with four or eight young rabbits from 16 to 35 days old did not modify (P>0.05) the activity amylase independent of the evaluated age after weaning . The diets with high starch level in lactation phase increased (P
Highlights
O amido é digerido quase que na sua totalidade no intestino delgado e a amilase pancreática é a principal enzima envolvida nesse processo
Amylase specific activity1in the jejunum and ileum of rabbits at 35, 50 and 70 days of age fed with diets contends different starch levels before and after weaning and maintained in litters with four or eight young rabbits from 16 days of age to weaning
DOJANA, N. et al The activity of some digestive enzymes in domestic rabbits before and after weaning
Summary
Para avaliar a atividade amilásica no jejuno e no íleo de coelhos após a desmama, foram utilizados 200 coelhos da raça Nova Zelândia Branco, submetidos a diferentes padrões de alimentação desde a fase de lactação. Para modular o padrão de consumo de leite e de ração antes da desmama, as ninhadas foram ajustadas para 8 láparos ao nascer até o 16o dia de vida. A partir do 16.o dia de idade até a desmama, com 35 dias de idade, as ninhadas foram distribuídas em um esquema fatorial 2 x 2 (dois tamanhos de ninhadas versus dois níveis de amido nas dietas) ou seja, foram submetidas à alta ou baixa disponibilidade de leite, mantendo ninhadas com 4 ou 8 láparos, os quais receberam dietas com níveis normal (15%) ou alto (24%) de amido (Tabela 1). A partir da desmama, os 160 animais restantes foram redistribuídos em esquema fatorial 2x2x2 (ninhadas submetidas à baixa e alta disponibilidade de leite versus dois níveis de amido nas dietas até a desmama versus dois níveis de amido nas dietas após a desmama). Percentual and chemical composition of the experimental diets in natural matter
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