Differences in signal contrast and camouflage among different colour variations of a stomatopod crustacean, Neogonodactylus oerstedii.,Scientific Reports

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Differences in signal contrast and camouflage among different colour variations of a stomatopod crustacean, Neogonodactylus oerstedii.
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-27 , DOI: 10.1038/s41598-020-57990-z
Amanda M Franklin _{1,

2} , Justin Marshall ₃ , Adina D Feinstein ₁ , Michael J Bok ₄ , Anya D Byrd ₅ , Sara M Lewis ₁

Affiliation

Animal colouration is often a trade-off between background matching for camouflage from predators, and conspicuousness for communication with con- or heterospecifics. Stomatopods are marine crustaceans known to use colour signals during courtship and contests, while their overall body colouration may provide camouflage. However, we have little understanding of how stomatopods perceive these signals in their environment or whether overall body coloration does provide camouflage from predators. Neogonodactylus oerstedii assess meral spot colour during contests, and meral spot colour varies depending on local habitat. By calculating quantum catch for N. oerstedii's 12 photoreceptors associated with chromatic vision, we found that variation in meral spot total reflectance does not function to increase signal contrast in the local habitat. Neogonodactylus oerstedii also show between-habitat variation in dorsal body colouration. We used visual models to predict a trichromatic fish predator's perception of these colour variations. Our results suggest that sandy and green stomatopods are camouflaged from a typical fish predator in rubble fields and seagrass beds, respectively. To our knowledge, this is the first study to investigate signal contrast and camouflage in a stomatopod. These results provide new insight into the function and evolution of colouration in a species with a complex visual system.

中文翻译：

气孔甲壳动物新角线虫的不同颜色变化之间信号对比度和伪装的差异。

动物的着色通常是在背景匹配（捕食者的伪装）和显眼的（与异或特异物种）交流之间进行权衡。脚足类动物是海洋甲壳类动物，已知在求爱和比赛期间会使用颜色信号，而它们的整体身体颜色可能会提供伪装。然而，我们对气孔足类动物在其周围环境中如何感知这些信号或全身着色是否确实能使捕食者提供伪装一无所知。oerstedii Neogonodactylus oerstedii会在比赛期间评估血斑颜色，而血斑颜色则取决于当地栖息地。通过计算N. oerstedii的12个与色觉相关的光感受器的量子捕获量，我们发现，金属斑点全反射率的变化不会起到增加本地栖息地信号对比度的作用。oerstedii新角线虫还显示背体着色的栖息地之间的差异。我们使用视觉模型来预测三色鱼捕食者对这些颜色变化的感知。我们的结果表明，沙石和绿色的气生足类动物分别是瓦砾田和海草床中典型鱼类捕食者的伪装。据我们所知，这是第一个研究气孔足中信号对比度和伪装的研究。这些结果为具有复杂视觉系统的物种的着色功能和进化提供了新的见识。我们的结果表明，沙石和绿色的气生足类动物分别是瓦砾田和海草床中典型鱼类捕食者的伪装。据我们所知，这是第一个研究气孔足中信号对比度和伪装的研究。这些结果为具有复杂视觉系统的物种的着色功能和进化提供了新的见识。我们的结果表明，沙石和绿色的气生足类动物分别是瓦砾田和海草床中典型鱼类捕食者的伪装。据我们所知，这是第一个研究气孔足中信号对比度和伪装的研究。这些结果为具有复杂视觉系统的物种的着色功能和进化提供了新的见识。

更新日期：2020-01-27

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