Impact of starch and sugar addition into the diet on feed intake, body weight and digestibility in addax (Addax nasomaculatus)
Marcin Przybyło , Sara Dander , Karolina Krawiec , Alina Kloska , Paweł Górka
AbstractIt is recommended that grains and fruits should be excluded from diets for captive ruminants. An important rational for this recommendation, beside the fact that these feeds are likely not a part of wild ruminants’ diet, is that increased intake of nonstructural carbohydrates reduces intake of roughages and may have a negative impact on the gastrointestinal tract of these animals. The aim of the study was to determine impact of addition of starch and sugar on feed intake, body weight and digestibility in addax. Four adult female addax were used in a 4 × 4 Latin square design and fed a basal diet consisting of a small portion of wheat bran (100 g/day/animal; diet A), wheat bran and wheat (100 and 400 g/day/animal; diet B), wheat bran and sucrose (100 and 50 g/day/animal; diet C) or wheat bran, wheat and sucrose (100, 400 and 50 g/day/animal; diet D). Ground wheat was used as a source of starch and sucrose was used as a source of sugar in the diet. The amounts of wheat and sucrose were set to account for 15 and 2% of dry matter (DM), respectively, consumed by addax prior to the study, thus, reflecting starch and sugar intake with grain and fruits by addax in some zoos. Meadow hay was fed ad libitum. Each experimental period lasted 19 days: 14 days of adaptation and 5 days of data and sample collection. Feed intake was controlled daily. Body weight was controlled at the initiation of the study and at the end of each experimental period. Representative samples of feces were collected during the last 5 days of each experimental period and total tract nutrient digestibility was calculated using indicatory method. Wheat bran, wheat and sucrose were always consumed. Addition of wheat to the diet reduced DM intake of hay (P < 0.01) but addition of sucrose had no effect (P = 0.96). Total DM intake was not affected by treatment (P ≥ 0.21) as well as total tract nutrient digestibility, with exception to crude protein digestibility that was greater when wheat was fed in the diet (P = 0.05). Body weight was also not affected by treatment (P ≥ 0.31). There was no interaction between wheat and sugar addition to the diet in the current study. In order to ensure high intake of roughages by captive ruminants, grain (starch) supplementation should be limited.
|Publication size in sheets||0.3|
|Book||Cledwyn Thomas (eds.): Advances in Animal Biosciences : Proceedings of the XIIIth International Symposium on Ruminant Physiology (ISRP 2019), 3-6 September 2019, Leipzig, Germany, Advances in Animal Biosciences, vol. 10, no. 3, 2019, Cambridge University Press, 658 p.|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.