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<p>The mud spiny lobster <i>Panulirus polyphagus</i> is the most commonly landed spiny lobster species in Bangladesh, yet biological information on the species remains limited. The present study evaluated the length–weight relationship and relative condition factor of <i>P. polyphagus</i> from Teknaf, Moheshkhali, and Inani along the southeast coast of Bangladesh during October–December 2025. A total of 270 specimens were examined, comprising 90 individuals from each site (45 males and 45 females). Body weight ranged from 131.19 to 366.00&#xa0;g in males and 133.03–392.37&#xa0;g in females, and carapace length from 5.83 to 8.07&#xa0;cm and 5.84–8.23&#xa0;cm, respectively. Body weight differed significantly among sites (<i>p</i> &lt; 0.05), whereas carapace length did not vary among sites or sexes. Strong length–weight relationships were observed across all sites and sexes (R² = 0.797–0.896), with slope (b) values ranging from 2.571 to 3.088. ANCOVA indicated no significant differences in the length–weight relationship among sites or between sexes (<i>p</i> &gt; 0.05). Relative condition factor values remained close to unity across all groups, and two-way ANOVA showed no significant effects of site or sex (<i>p</i> &gt; 0.05). The findings provide baseline information for future monitoring and assessment of <i>P. polyphagus</i> in the coastal waters of Bangladesh.</p>

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Length–Weight Relationship and Condition Factor of Mud Spiny Lobster Panulirus polyphagus (Herbst, 1793) Along the Southeast Coast of Bangladesh

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • Antar Sarkar,
  • Tanjina Akter Brishty,
  • Sk. Ahmad Al Nahid,
  • Md. Oahidur Rahman Raihan,
  • Nazmul Hasan,
  • Arafat Islam Shuvo,
  • Md. Yeliash Al Jaber

摘要

The mud spiny lobster Panulirus polyphagus is the most commonly landed spiny lobster species in Bangladesh, yet biological information on the species remains limited. The present study evaluated the length–weight relationship and relative condition factor of P. polyphagus from Teknaf, Moheshkhali, and Inani along the southeast coast of Bangladesh during October–December 2025. A total of 270 specimens were examined, comprising 90 individuals from each site (45 males and 45 females). Body weight ranged from 131.19 to 366.00 g in males and 133.03–392.37 g in females, and carapace length from 5.83 to 8.07 cm and 5.84–8.23 cm, respectively. Body weight differed significantly among sites (p < 0.05), whereas carapace length did not vary among sites or sexes. Strong length–weight relationships were observed across all sites and sexes (R² = 0.797–0.896), with slope (b) values ranging from 2.571 to 3.088. ANCOVA indicated no significant differences in the length–weight relationship among sites or between sexes (p > 0.05). Relative condition factor values remained close to unity across all groups, and two-way ANOVA showed no significant effects of site or sex (p > 0.05). The findings provide baseline information for future monitoring and assessment of P. polyphagus in the coastal waters of Bangladesh.