Cuttlefish camouflage: visual perception of size, contrast and number of white squares on artificial checkerboard substrata initiates disruptive coloration.
Cuttlefish camouflage: visual perception of size, contrast and number of white squares on artificial checkerboard substrata initiates disruptive coloration.
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发表时间：
2001-06
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通讯作者：
C. Chiao;R. Hanlon
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作者：
C. Chiao;R. Hanlon
我们调查了一些视觉背景的功能，影响年轻的乌贼，乌贼法老，改变他们的皮肤图案从“一般相似”的底层破坏性着色，打破了他们的身体形态。使用计算机生成的黑/白色棋盘图案作为基底，我们首先发现，白色方块的大小必须在一定的狭窄范围内（相对于乌贼“白色方块”的大小），动物才能表现出破坏性的皮肤图案。第二，在棋盘格大小合适的情况下，乌贼会根据白色和黑色方块的对比度来调节其破坏性的皮肤图案。第三，通过控制黑色背景上白色方块的数量，我们发现，在316个黑色方块中，只有4个白色方块（或1.25%）会产生破坏性图案，而将白色方块的数量增加到20个、40个或80个并不会增加乌贼“白色方块”出现的频率，而只是增加了表达的清晰度。这些结果表明，周围基质中的白色物体的大小，对比度和数量影响年轻乌贼的破坏性皮肤图案的产生和表达。
We investigated some visual background features that influence young cuttlefish, Sepia pharaonis, to change their skin patterning from 'general resemblance' of the substratum to disruptive coloration that breaks up their body form. Using computer-generated black/white checkerboard patterns as substrata, we first found that the size of the white squares had to be within a certain narrow range (relative to the size of the cuttlefish 'white square') for the animal to exhibit disruptive skin patterning. Second, given the appropriate size of checker, cuttlefish regulated their disruptive skin patterns according to the contrast between white and black squares. Third, by manipulating the number of white squares on a black background, we found that as few as four white squares among 316 black squares (or 1.25%) produced disruptive patterning, yet increasing the number of white squares to 20, 40 or 80 did not increase the frequency of appearance of the cuttlefish 'white square', but only its clarity of expression. These results demonstrate that the size, contrast and number of white objects in the surrounding substratum influence the production and expression of disruptive skin patterns in young cuttlefish.