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<p>The Portunidae family is one of the most economically significant crab families globally. This study evaluated the effects of LED light colors (red, green, blue) on the catch per unit effort (CPUE) and catch rates, and carapace widths (CW) of swimming crabs through field experiments conducted in Terengganu (Malaysia), Pattani (Thailand), and Penghu (Taiwan). Across all sampling locations, the Generalized Linear Mixed Models (GLMMs) results showed that the positive effects of LED lights on CPUE followed the order: blue light, green light, and red light. However, the differences in CPUE among the different light treatments were small. Although some variation was observed in the responses of different species to each LED light color, these differences were not statistically significant. In terms of catch rate and carapace width, the effects of LED light treatments were not apparent. Crabs across the sampling locations varied significantly in size. Although the impact on catch rates was limited, LED lights hold potential for reducing bait loss caused by bycatch. Future research should investigate light intensity, bait-light combinations, and environmental impacts to optimize the application of LED lights in swimming crab trap fisheries.</p>

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The effect of LED wavelength variations on catch efficiency in Portunidae trap fisheries

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Wei Yu Lee,
  • Hui Xu,
  • Muhamad Naimullah,
  • Mhd Ikhwanuddin,
  • Khor Waiho,
  • Hanafiah Fazhan,
  • Sukree Hajisamae,
  • Yasuzumi Fujimori

摘要

The Portunidae family is one of the most economically significant crab families globally. This study evaluated the effects of LED light colors (red, green, blue) on the catch per unit effort (CPUE) and catch rates, and carapace widths (CW) of swimming crabs through field experiments conducted in Terengganu (Malaysia), Pattani (Thailand), and Penghu (Taiwan). Across all sampling locations, the Generalized Linear Mixed Models (GLMMs) results showed that the positive effects of LED lights on CPUE followed the order: blue light, green light, and red light. However, the differences in CPUE among the different light treatments were small. Although some variation was observed in the responses of different species to each LED light color, these differences were not statistically significant. In terms of catch rate and carapace width, the effects of LED light treatments were not apparent. Crabs across the sampling locations varied significantly in size. Although the impact on catch rates was limited, LED lights hold potential for reducing bait loss caused by bycatch. Future research should investigate light intensity, bait-light combinations, and environmental impacts to optimize the application of LED lights in swimming crab trap fisheries.