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<p>The effects of seven different light spectra—white (full spectrum), violet (400 nm), blue (425 nm), cyan (510 nm), green (525 nm), yellow (598 nm), and red (638 nm)—on the survival, growth, molting, respiratory metabolism, antioxidant capacity, and stress responses of juvenile swimming crabs were investigated, and to further explore the molecular mechanisms through which light spectra influence these physiological processes, transcriptome analysis was conducted. Results indicate that cyan light enhanced the growth performance of swimming crabs, with greater mean values of specific growth rate (SGR), weight gain rate (WGR), and molting frequency than those of the other groups. Additionally, the oxygen consumption rate (OCR) and ammonia excretion rate (AER) of crabs in yellow group (<i>P</i>&lt;0.05) were significantly increased. Swimming crabs experienced heightened oxidative stress, as antioxidant enzymes were unable to effectively neutralize excessive lipid peroxides under red light. Furthermore, the expression of (retinoid X receptor) <i>rxr</i> and (ecdysone-induced protein 75) <i>e75</i> genes in juvenile swimming crabs under cyan light were significantly elevated (<i>P</i>&lt;0.05), promoting molting. Our further investigation into the potential molecular mechanisms of these effects revealed the structural molecule activity, cuticle composition, and ribosomal function as potential regulators of molting, and the close ties of DNA replication and base excision repair pathways with oxidative stress responses. Our findings suggest that cyan light is beneficial for enhancing the growth and overall well-being of juvenile swimming crabs.</p>

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Effects of light spectrum on survival rate, growth performance, and oxidative stress in juvenile swimming crab (Portunus trituberculatus)

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Lulu Zhu,
  • Shuai Zhang,
  • Shujian Chen,
  • Changbin Song,
  • Yangfang Ye,
  • Ronghua Li,
  • Weiwei Song,
  • Changkao Mu,
  • Chunlin Wang,
  • Ce Shi

摘要

The effects of seven different light spectra—white (full spectrum), violet (400 nm), blue (425 nm), cyan (510 nm), green (525 nm), yellow (598 nm), and red (638 nm)—on the survival, growth, molting, respiratory metabolism, antioxidant capacity, and stress responses of juvenile swimming crabs were investigated, and to further explore the molecular mechanisms through which light spectra influence these physiological processes, transcriptome analysis was conducted. Results indicate that cyan light enhanced the growth performance of swimming crabs, with greater mean values of specific growth rate (SGR), weight gain rate (WGR), and molting frequency than those of the other groups. Additionally, the oxygen consumption rate (OCR) and ammonia excretion rate (AER) of crabs in yellow group (P<0.05) were significantly increased. Swimming crabs experienced heightened oxidative stress, as antioxidant enzymes were unable to effectively neutralize excessive lipid peroxides under red light. Furthermore, the expression of (retinoid X receptor) rxr and (ecdysone-induced protein 75) e75 genes in juvenile swimming crabs under cyan light were significantly elevated (P<0.05), promoting molting. Our further investigation into the potential molecular mechanisms of these effects revealed the structural molecule activity, cuticle composition, and ribosomal function as potential regulators of molting, and the close ties of DNA replication and base excision repair pathways with oxidative stress responses. Our findings suggest that cyan light is beneficial for enhancing the growth and overall well-being of juvenile swimming crabs.