駆集網の色彩の濃さの効果について

スポンサーリンク

概要

• 論文の詳細を見る

• The author has done those experiments continously for the former report (Refference 1) which was carried out the effect of colour vinyle cord as a model net on drive to fish. 10 goldfish Carassius auratus of an average total length of 3.5cm. were liberated in a wooden tank of 50cm. long, 26cm. wide and 10cm. water depth. A pair of model nets are prepared which wooden frames are stretched netting of small mesh, except the middle part, because inserting three glass tubes in it, seeing Fig. 1. Observing for effect of colours, there were used red, blue and black inks to fill each glass tube, and for depth of colour, these inks were diluted in 10……1, 000 times. The centralizing method was done with repeat of 40 times using all these 11 conditions and in all combinations of two conditions each. The sum of the total values were given in Table 1. and they were applied the chi-square test of statistics and the visible distance of the glass tubes in the water were given in Table 2. Even the driving effect is in being of difference by kinds of colours, he recognized superiority and inferiority of the effect according the depth of colour in the same. The visible distance of those glass tubes in the water was coincided with the order of depth of colour, neverthless the colour more visible in the water is not always excellent on the driving effect. As coincide with the result of the former report, the red ink of non-dilution is most excellent on driving effect. To sum up of those conception, he thinks over that the distinctness with kind and depth of colour is excellent on driving effect.

• 社団法人 日本水産学会の論文

著者

• 草下 孝也

  東京大学農学部

関連論文

• 垂直網の網目と魚体の大きさとの関係
• 傾斜沈垣網の効果について
• 彩色した沈垣網の効果について
• 狭い場所から開放されたときの魚群の行動
• 魚の種類による駆集網の駆集効果
• 駆集網に関する二つの実験方法による網目の大きさ
• 駆集網の色彩の濃さの効果について

スポンサーリンク