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- W2116796711 abstract "Experiments were performed to study the effect of measurement duration on the palatability of 11 range species and to define a palatability index. The range species were randomly distributed in five combinations (C1–C5) each containing four species. Each combination was tested over a 15 day experimental period on four 1-year-old sheep and five 2-year-old dromedaries (Camelus dromedarius). Animals received the four range species ad libitum daily at 08:00 h and were supplemented at 17:00 h with spineless cactus. Barley hay (standard food) was offered with the range species only during the first 5 days of each experimental period. Food intakes measured on the first day (I1), average food intakes in the first 5-day period (I5), the second 5-day period (I10) and the third 5-day period (I15) were compared. Significant correlations were found between I1 and I5 (r = 0.93, P < 0.01), I5 and I10 (r = 0.75, 0.01) or I15 (r = 0.61, P < 0.05), and I10 and I15 (r = 0.87, P < 0.001) for sheep. These correlations were higher for dromedaries, and intakes may be predicted by the following regression equations: I5 = 1.09I1 + 0.07 (r = 0.96, P < 0.001); I10 = 1.15I1 + 0.25 (r = 0.85, P < 0.01); I15 = 1.42I1 + 0.32 (r = 0.78, P < 0.01). As the range species were not offered in the same amounts, intakes were expressed as a percentage of the relative quantities offered daily (I1D1, I5D5, I10D10 and I15D15). The same trend as reported above was observed between I1D1 and I5D5, I1D1 and I10D10, and I1D1 and I15D15. Such results suggested that for dromedaries 1 day of measurement may be sufficient for palatability assessment while for sheep this period should be extended to 5 days for better accuracy of intake prediction. As all the range species were not offered at one time, I1D1 and I5D5 ratios were expressed in relation to hay intake (HI)hay distributed (HD) ratio. Two indices were then calculated: R1 = (I1/D1)/(/HI1/HD1) and R2 = (I5/D5)/(HI5/HD5). R1 and R2 were found to be highly correlated for sheep (r = 0.94) and dromedaries (r = 0.92). Therefore, R1 was chosen as a palatability index. The range species were ranked using this index and animal preferences were established." @default.
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- W2116796711 date "1994-03-01" @default.
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- W2116796711 title "Palatability of shrubs and fodder trees measured on sheep and dromedaries: 1. Methodological approach" @default.
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- W2116796711 doi "https://doi.org/10.1016/0377-8401(94)90072-8" @default.
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