The Effects of Video Images, Slides and Pecking Sounds of Conspecifics on Feeding Behavior of Chicken.

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  • BAO Yuexian
    Faculty of Agriculture, Tokyo University of Agriculture and Technology United Graduate School (Ibaraki University)
  • MATSUZAWA Yasuo
    Faculty of Agriculture, Ibaraki University
  • YASUE Takeshi
    Faculty of Agriculture, Ibaraki University

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  • 同種個体の動画,静止画およびついばみ音の提示が鶏の採食行動に及ぼす影響
  • ドウシュ コタイ ノ ドウガ セイシガ オヨビ ツイバミ オン ノ テイジ ガ ニワトリ ノ サイショク コウドウ ニ オヨボス エイキョウ

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In this study we observed the influences of video images and slides of feeding or standing conspecifics and pecking sounds as social stimuli on feeding behavior of 16 adult hens. Each stimulus was presented individually in the way of "continuous presentation" or "connective presentation" . In the continuous presentation six different visual and auditory stimuli were used : moving and static life-size images of both of feeding and standing hens, pecking sounds and a blank illumination (control), with each bird exposed to each of six stimuli for 5 minutes. Both amount of food consumed and number of food pecks were significantly greater when exposed to the moving image of feeding hen than when exposed to others. Following the moving feeding hen's image, static feeding hen's image induced significantly greater food consumption and food pecks than three other stimuli. There was no significant difference between static feeding hen's image and pecking sounds in these two measurements. In the connective presentation experiment, four kinds of stimuli that took turns successively at 15-second shifts with five repetitions during 5 minutes were connected in the same order but different starting point, and consequently four types of presentations were made up in both the moving image - peck sound series and static image-peck sound series. What kind of stimulus appeared first strongly affected food consumption over whole 5 minute period in both series. But time series analysis revealed that change patterns of number of food pecks fluctuated showing the same effects of each stimulus as those found in the continuous presentation experiment and were significantly regular regardless of what kind of stimulus appeared first. It was concluded that feeding behavior of hen could be most strongly accelerated by the visual stimuli of actions of feeding conspecifics and static feeding hen's image might also have a comparable effect to food pecking sounds, and hens could change their feeding behavior at short intervals in keen response to changes of stimuli.

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