Effects of the short dark period on ruminating behavior of goats

概要

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The experiments were conducted to study how short dark periods a day affects on ruminating behavior and eating behavior of 5 goats. Lighting schedules of a day were 2 hours dark (2D) : 22 hours light (22L), 3D: 21L and 4D: 20L in three experiments.<BR>In the 2 D experiment, ruminating time was less during the dark period than the light period and 4D of 4D experiment significantly (p<0.05), but eating time was more in the dark period than the light period.<BR>In 3D and 4D experiments, too, the ruminating time less during the dark period than the light period (P<0.05), and eating time also followed the same pattern.<BR>As mentioned above, results of those three experiments suggest that the short dark period play a role of controlling the circadian changes of ruminating bahaviors.
日本暖地畜産学会の論文