著者
渡辺 宗孝 岩田 清二
出版者
The Japanese Society for Animal Psychology
雑誌
動物心理学年報 (ISSN:00035130)
巻号頁・発行日
vol.6, pp.75-82, 1956-04-25 (Released:2009-10-14)
参考文献数
10
被引用文献数
13 11

(1) ダンゴムシにおいては交替性転向反応が明らかに認められる。(2) 予め撰択的に転向させた場合と強制的に転向させた場合とでは, その後の撰択反応に差が認められない。(3) 撰択反応に先んじて, 同じ方向に強制的に2回転向せしめた場合には, 1回だけ転向せしめた場合に比較して, 交替性が更に高率に現われる。(4) 先行転向1回の場合には, 撰択点と先行転向点との間の距離が増すに従つて交替性が減少し, 距離を16cmにすると対照との問に有意の差が認められなくなる。(5) 先行転向2回の場合には, 撰択点とその直前の転向点との間の距離を増大せしめたときのみならず, 両先行転向点間の距離を増大せしめても交替性が減少する。しかしこれらの場合直線路を16cmとしても, 猶その前の転向の影響が見られる。(6) 以上の結果はいづれもHULLの反応性制止の原則を是認すれば, それから期待されることである。
著者
岩田 清二 渡辺 宗孝
出版者
社団法人日本動物学会
雑誌
動物学雑誌 (ISSN:00445118)
巻号頁・発行日
vol.66, no.12, pp.464-467, 1957-12-15

A terrestrial isopod pill-bug, Armadillidium vulgare, shows a positive thigmotactic behavior in a L-T maze as shown in Fig. 1. The so-called alternate turning response of this animal seems to be a natural result of this thigmotaxis as described in the following lines. The animals started from the starting box continue to progress until they come to the L-point and knock against the wall which blocks their straight passage, and there they are forced to turn to the right and run along the left wall of the straight path keeping close contact with it. This causes an oblique progression somewhat leftwards at T-point after they have been freed from the contact with the wall, perhaps owing to the homostrophic reflex. In this way, they strike against the distal wall of the T-point with their right body-sides. Further progress ensues keeping the contact of this body-side with the distal wall, resulting in the leftward turning. This is a typical behavior observed in the majority of the animals in the maze, indicating that the basic mechanism of behavior is thigmotaxis. As is stated above, the animals found in the left area at the end of the straight path turn to the left alternating with the preceding rightward turning at L-point. However, those found exceptionally in the right area turn to the right agreeing with the preceding. This fact seems to indicate that the turning is directly based on the mechanism depending upon thigmotaxis (homostrophic reflex) rather than what is predicted by the place avoidance theory or the reactive inhibition theory, both of which claim that the direction of turning at T-point is determined by that in preceding turn.
著者
岩田 清二 渡辺 宗孝
出版者
社団法人日本動物学会
雑誌
動物学雑誌 (ISSN:00445118)
巻号頁・発行日
vol.66, no.12, pp.468-471, 1957-12-15
被引用文献数
1

An experiment was designed to analyse what sense organ is functioning in maze turning behavior of a pill-bug, Armadillidium vulgare. The animals operated were put one by one into a maze as shown in Fig. 1. Blinding both compound eyes has no serious influence on the behavior in the maze regarding the mode, the track and the rate of progression, except for fine zigzag walking in some individuals. Extirpation of antennae, on the contrary, reduces markedly the speed of walking and makes the animal walk holding its side of anterior body close to the wall of the path. Blinding, in this case also, does not affect the behavior. When either of two antennae is extirpated, the animal behaves depending upon the tactile sense of the remaining antenna or of the body surface of operated side. Even when the animal goes straight on at T-point till it comes contact with the distal wall at right angle, the initial tactile sensation is naturally induced by the remaining antenna. Therefore, the direction of turning at T-point is determined so as to keep the antennae contact with the distal wall. These results afford direct evidences to justify the thigmotaxis theory of alternate turning response of this animal, in which the progression and turning are claimed to depend not on the visual sense but on the positive thigmotaxis based on the tactile sense of antennae or body surface.