ABSTRACT The objective of this study was to evaluate increasing levels of dried apple pomace on cat diets and its effects on the apparent total tract digestibility (ATTD) of nutrients and diet metabolizable energy (ME) and palatability. Fecal characteristics of cats were also evaluated. Four experimental diets were produced to contain 0, 30, 60, and 90 g kg−1 of dried apple pomace. Two experiments were carried out. In experiment 1, the diets were offered to twelve adult cats distributed in a completely randomized block design (n = 6). Two evaluation periods (blocks) of 11 days were used to analyze diet digestibility and fecal characteristics. In experiment 2, the palatability of diets containing 0 (control) vs. 90 g kg−1 of dried apple pomace was compared using 20 adult cats on two consecutive days (n = 40). Increasing dietary dried apple pomace levels (0-90 g kg−1) linearly reduced the ATTD of crude protein (834.0-798.0 g kg−1 of dry matter) and ME (4290.1-4161.0 kcal). There was a quadratic effect of the increasing dried apple pomace levels on the ATTD of the other nutrients, as well as on fecal dry matter (fDM) content and output. The dietary inclusion of 90 g kg−1 of dried apple pomace promoted a greater intake ratio (0.61) in relation to the control diet. The inclusion of up to 90 g kg−1 of dried apple pomace reduces diet digestibility, ME, and fDM of cats. However, it improves diet palatability. These results indicate that the dried apple pomace is a palatable fibrous component and its inclusion can be used to reduce the energy content of cat foods.
RESUMO. Objetivou-se avaliar a qualidade interna de ovos de poedeiras comerciais da linhagem Hy-Line W-36(r), em função da temperatura, tempo e embalagem. Foram conduzidos dois experimentos, que iniciaram com um dia de diferença, cada um com 140 ovos. Cada experimento foi dividido em duas fases, sendo de um a nove dias e de nove a 21 dias. O delineamento foi em blocos casualisados. Na primeira fase, os tratamentos foram arranjados em fatorial 2 x 3 + 1, embalagem (com ou sem), tempo (3, 6 e 9 dias), e um controle no primeiro dia. Na segunda fase, o arranjo foi 2 x 2+1, embalagem (com ou sem), refrigeração (com ou sem), e um controle no nono dia. Avaliou-se o peso do ovo, percentagem de albúmen, gema e casca, índice gema e unidade Haugh. A qualidade interna reduziu (p < 0,05) durante o armazenamento, e os ovos mantidos no ambiente apresentaram redução (p < 0,05) na qualidade interna, enquanto que os ovos sob a refrigeração apresentaram a mesma (p > 0,05) qualidade no nono e no 21º dia. A embalagem melhorou (p < 0,05) a qualidade, no entanto, não com a mesma eficiência que a refrigeração. Conclui-se que a qualidade dos ovos piora com o armazenamento se não houver refrigeração e a utilização de embalagem gera melhor qualidade interna, no entanto, não é tão eficaz quanto à refrigeração.
ABSTRACT. Current assay evaluates the internal quality of eggs of Hy-Line W-36 hens, according to storage time, temperature and packaging. Two equal experiments, starting one day apart, were conducted with 140 eggs each. The two experiments were divided into two phases, from 1 to 9 days and from 9 to 21 days, in a randomized block design. In the 1st phase, the treatments were arranged in a factorial 2 x 3+1, packaging (with or without), time (3, 6 and 9 days), with control on the 1st day. In the 2nd phase, treatments were arranged in a factorial design 2 x 2 + 1, packaging (with or without), cooling (with or without), and control on the 9th day. Egg weight, albumen, yolk and shell percentage, yolk index and Haugh unit were evaluated. The internal quality was reduced (p < 0.05) during storage and the internal quality of eggs kept at room temperature decreased (p < 0.05), whereas eggs stored under refrigeration showed the same quality (p > 0.05) on the 9th and 21st days. Packaging assured better quality (p < 0.05), but not similar to the quality of refrigerated eggs. Results showed that the internal quality of the eggs was worse when there was no refrigeration during storage time and that packages provided better internal quality, although not as effective as cooling.