Discrimination using the color variation of chela in the mud crab genus Scylla in Japan
Discrimination using the color variation of chela in the mud crab genus Scylla in Japan
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利用日本青蟹属蟹爪颜色变化进行识别
DOI：
10.11233/aquaculturesci1953.55.265
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Seiichi Watanabe
中科院分区：
文献类型：
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作者：
R. Fuseya;M. Yokota;Seiichi Watanabe
为了对青蟹属的种类进行分类，以便于种群管理，利用简单的数字图像分析技术观察了不同种类青蟹的颜色差异。使用从42蟹获得的数字图像，我们采样的原始颜色规格（sRGB）值的4行上的每只螃蟹的螯。通过颜色匹配函数将这些数据转换为L* a* B* 颜色规格值。3种植物的L*、a* 和B* 值在不同观测区域的特征不同。特别是1号线和2号线上的青蟹a* 值几乎高于其他2种，而锯缘青蟹B* 值低于其他2种。主成分分析和判别分析也表明，三个物种之间有明显的颜色分化。因此，我们可以通过这些颜色规格的特征来区分三种。
To classify species of the mud crab genus Scylla for stock managements, color variations among species were observed using a simple digital imaging analysis. Using digital images obtained from 42 crabs, we sampled original color specification (sRGB) values of 4 lines on a chela of each crab. These data were translated into L* a* b* color specification values by the color matching functions. The characters of L*, a* and b* values were different among three species in several observed regions. In particular, a* values of Scylla olivacea on Line 1 and 2 were almost higher than the other 2 species, and b* values of Scylla serrata on Line 1 and 2 were lower than the others. Principal component and discriminant analyses also demonstrated apparent color differentiation among three species. Therefore, we can distinguish three species by these features of color specification.