Color effect of the environment-friendly sinker for octopus drift-line

Young-il An
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引用次数: 3

Abstract

The choice behavior of the octopus in response to the environment-friendly colored sinker for octopus drift-line and the sinkers fishing effect were studied under experimental conditions in the water tank and thefield. The colors of the sinkers used for the experiment are white, black, yellow and green. Artificial baitsare attached to the sinkers in order to attract the octopuses in the experiment. In the water tank experiment,two sinkers of two different colors are placed in a compartmentalized corner of the rectangular tank, and aCCD camera records the choice behaviors of the octopuses to the colored sinkers. In the field experiment,the catch investigation of octopus for each colored sinker was conducted 14 times in total by using 2(A, B)commercial fishing boats at the coast of Gangneung within 30m of depth in 2006. The number of coloredsinkers per operation was a total of 24-40 pieces with the same number of sinkers individually for fourcolors. As a result, it was found that the octopus selected white the most followed by black and yellow intheir choice of colored sinkers in the water tank experiment, and green was the lowest in their choice. Evenin the field experiment, the sinkers of white and black showed a higher catch of octopus than the sinkers ofyellow and green. Key words : Octopus Drift-line, Environment-friendly Sinker, Color effect
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八爪鱼漂线环保型下沉器的色彩效果
在水箱和野外试验条件下,研究了章鱼对环境友好型彩色下沉器对章鱼漂线的选择行为和下沉器的捕捞效果。实验中使用的下沉器的颜色有白色、黑色、黄色和绿色。在实验中,为了吸引章鱼,在下沉器上贴上了人工鱼饵。在水箱实验中,将两种不同颜色的下沉器放置在矩形水箱的一个分隔的角落,aCCD摄像机记录章鱼对不同颜色的下沉器的选择行为。在现场试验中,2006年在江陵沿海30米深度范围内,利用2艘(A、B)商业渔船,共进行了14次各色沉船的章鱼捕捞调查。每次操作的彩色下沉器数量为24-40个,每种颜色的下沉器数量相同。结果发现,在水箱实验中,章鱼对颜色的选择中,白色的选择最多,其次是黑色和黄色,绿色的选择最少。即使在实地试验中,白色和黑色的水槽也比黄色和绿色的水槽更容易捕获章鱼。关键词:章鱼漂线;环保沉线;色彩效果
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