Excretion rates of indigestible plastic balls of different specific gravities and diameters in dairy cattle
| Autor: | Tomohiro Seyama, Koji Kasai, Hirofumi Hirayasu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Lower Gastrointestinal Tract 040301 veterinary sciences Chemistry 04 agricultural and veterinary sciences General Medicine Anatomy 0403 veterinary science Excretion 03 medical and health sciences Rumen 030104 developmental biology Animal science Recovery rate Digestive tract Particle size General Agricultural and Biological Sciences Dairy cattle Specific gravity |
| Zdroj: | Animal Science Journal. 88:94-98 |
| ISSN: | 1344-3941 |
| DOI: | 10.1111/asj.12590 |
| Popis: | We used plastic balls to investigate how their specific gravity and diameter affect excretion rate and rumination in dairy cattle, to develop a capsule that can be used for reaching the lower gastrointestinal tract without physical breakdown and/or degradation in the rumen. Twelve types of indigestible plastic balls composed of a combination of four specific gravities (0.95, 1.19, 1.41, or 2.20) and three diameters (3.97, 6.35, or 7.94 mm) were orally administered to lactating dairy cows, and the balls were collected from feces, after 120 h post-administration, to evaluate the recovery rate. Recovery rate of the balls with specific gravity 1.19 or 1.41 and diameter 6.35 or 7.94 mm was higher than those with specific gravity 0.95 or 2.20 and diameter 3.97 mm. The cumulative recovery rate at 24 and 48 h post-administration was higher for balls with specific gravity 1.19 than that for balls with other specific gravities. These results suggest that specific gravity 1.19 or 1.41 and diameters 6.35-7.94 mm are optimal for use in bypass capsules for administration to cattle. In addition, the passage time of capsules differed between specific gravities 1.19 and 1.41. |
| Databáze: | OpenAIRE |
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