Toyota Kenji, Usami Kazuki, Mizusawa Kanta, Ohira Tsuyoshi
Marine Biological Station, Sado Center for Ecological Sustainability, Niigata University, Sado, Niigata 952-2135, Japan. E-mail:
Department of Biological Sciences, Faculty of Science, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa, 259-1293, Japan. E-mail:
Zool Stud. 2022 Feb 23;60:e3. doi: 10.6620/ZS.2022.61-03. eCollection 2022.
Organisms have the ability to adapt their behavior and physiology in response to seasonal changes in their habitat's environments. Although it is known that a specific light wavelength affects growth and reproduction in various animal taxa, its effect on sexual and seasonal differences in year-round breeding animals remains unclear. Here, we demonstrate that a blue light stimulus promotes or suppresses larval growth in the red swamp crayfish depending on the season. During the spawning season (natural growing period), blue light irradiation accelerates female growth faster than in males, but suppresses growth in both females and males in the overwintering season. Moreover, these seasonal plastic effects of blue light show apparent sexual differences, with female juveniles exhibiting the greatest sensitivity. Our findings provide an opportunity to research how the red swamp crayfish can adapt to various habitable niches from the point of view of light color perception, and can be applied for the development of a more effective aquaculture system, not only for crayfish, but also for other commercially available decapod crustaceans using a specific light environment.
生物体有能力根据其栖息地环境的季节性变化来调整其行为和生理机能。尽管已知特定的光波长会影响各种动物类群的生长和繁殖，但其对全年繁殖动物的性别差异和季节性差异的影响仍不清楚。在此，我们证明蓝光刺激根据季节促进或抑制红沼泽螯虾幼体的生长。在产卵季节（自然生长时期），蓝光照射使雌性生长加速的速度比雄性更快，但在越冬季节抑制雌性和雄性的生长。此外，蓝光的这些季节性可塑性效应表现出明显的性别差异，雌性幼体表现出最大的敏感性。我们的研究结果为从光色感知的角度研究红沼泽螯虾如何适应各种适宜栖息地提供了契机，并且可应用于开发更有效的水产养殖系统，不仅适用于螯虾，也适用于其他利用特定光照环境的商业可用十足目甲壳类动物。
