Discrimination using the Color Variation of Chela in the Mud Crab Genus Scylla in Japan

• FUSEYA Reiko

  Ishigaki Tropical Station, Seikai National Fisheries Research Institute

• YOKOTA Masashi

  Tokyo University of Marine Science and Technology

• WATANABE Seiichi

  Tokyo University of Marine Science and Technology

Bibliographic Information

Other Title

• 日本のノコギリガザミ属３種における鉗脚の色彩変異による判別
• ニホン ノ ノコギリガザミゾク 3シュ ニ オケル ケンキャク ノ シキサイ ヘンイ ニ ヨル ハンベツ

Abstract

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.

Journal

• Aquaculture Science

  Aquaculture Science 55 (2), 265-269, 2007

  Japanese Society for Aquaculture Science

Keywords

• <I>Scylla</I>
• Mud crab
• Chela
• Color variation

Details

• CRID: 1390001204715791360
• NII Article ID: 130003865957
• NII Book ID: AN00124667
• DOI: 10.11233/aquaculturesci1953.55.265
• ISSN: 21850194
• ISSN: 03714217
• NDL BIB ID: 8876378
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030741699
• Web Site: http://id.ndl.go.jp/bib/8876378
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8876378
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed