Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.
Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan,
Zoolog Sci. 2023 Jun;40(3):203-207. doi: 10.2108/zs220118.
Different crustacean species can differ in their response to light. In Tanaidacea, a small group of aquatic, benthic crustaceans, previous studies suggested that several species may be positively phototactic based on their attraction to nocturnal light traps, but no experimental investigations of phototaxis had been conducted on this group. Here we show experimentally that two species in the genus are phototactic but exhibit opposite reactions to light; , which inhabits the blades and stipes of seaweeds, was positively phototactic, whereas , which inhabits muddy sediments overlying bedrock, was negatively phototactic. This differential response may reflect differences in photoenvironment between these species' microhabitats.
不同甲壳动物物种对光的反应可能不同。在端足目，一组小型水生底栖甲壳动物中，之前的研究表明，一些物种可能具有正趋光性，因为它们会被夜间的灯光陷阱吸引，但对该群体的趋光性还没有进行过实验研究。在这里，我们通过实验表明，属的两个物种具有趋光性，但对光的反应相反； ，栖息在海藻的叶片和茎上，具有正趋光性，而 ，栖息在基岩上的泥泞沉积物中，具有负趋光性。这种差异反应可能反映了这些物种微生境之间的光照环境差异。
