Length-Weight Relationship of the Three-Spot Swimming Crab (Portunus sanguinolentus Herbst, 1783) in Trang Province, Thailand
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Abstract
The length-weight relationship of Three-spot swimming crab (Portunus sanguinolentus Herbst, 1783) in the coastal area of Trang, southern Thailand was estimated from 1,553 crabs (male=956, female=597) collected by two fishing gear types, i.e. crab gill net and crab trap. The sampling was conducted between January to December 2016. The range of the inner carapace width (ICW), the outer carapace width (OCW) and the carapace length (CL) were 5.21-10.76, 6.34-13.34 and 2.82-6.56 cm, respectively. The range of body weight (BW) was 18-130 g The length-weight relationships between inner carapace width, outer carapace width and carapace length with body weight of the crabs were BW=0.208*ICW2.710, BW=0.134*OCW2.627 and BW=2.121*CL2.248, respectively. The values of the exponent “b” in the length–weight relationship (W=aLb) of males and females varied between 2.242 to 2.742. The slope of the linear equation, the number indicating growth pattern, were significantly different from “b=3” (p < 0.05) for all measured length of crabs. It can be concluded the growth patterns of Three-spot swimming crab was allometric.
Article Details
เนื้อหาและข้อมูลในบทความที่ลงตีพิมพ์ในวารสารวิชชา มหาวิทยาลัยราชภัฏนครศรีธรรมราช ถือเป็นข้อคิดเห็นและความรับผิดชอบของผู้เขียนบทความโดยตรง ซึ่งกองบรรณาธิการวารสารไม่จำเป็นต้องเห็นด้วยหรือร่วมรับผิดชอบใด ๆ
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการตีพิมพ์ในวารสารวิชชา มหาวิทยาลัยราชภัฏนครศรีธรรมราช ถือเป็นลิขสิทธ์ของวารสารวิชชา มหาวิทยาลัยราชภัฏนครศรีธรรมราช หากบุคคลหรือหน่วยงานใดต้องการนำข้อมูลทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อการกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวิชชา มหาวิทยาลัยราชภัฏนครศรีธรรมราชก่อนเท่านั้น
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