Laboratory for Sensory Ecology, Department of Biological Sciences, Bowling Green State University, Bowling Green, OH 43403, USA.
Department of Biology, Friends University, 2100 W. University Avenue, Wichita, KS 67213, USA.
J Exp Biol. 2021 Apr 1;224(7). doi: 10.1242/jeb.240457. Epub 2021 Apr 15.
Orientation within turbulent odor plumes occurs across a vast range of spatial and temporal scales. From salmon homing across featureless oceans to microbes forming reproductive spores, the extraction of spatial and temporal information from chemical cues is a common sensory phenomenon. Yet, given the difficulty of quantifying chemical cues at the spatial and temporal scales used by organisms, discovering what aspects of chemical cues control orientation behavior has remained elusive. In this study, we placed electrochemical sensors on the carapace of orienting crayfish and measured, with fast temporal rates and small spatial scales, the concentration fluctuations arriving at the olfactory appendages during orientation. Our results show that the spatial aspects of orientation (turning and heading angles) are controlled by the temporal aspects of odor cues.
在广阔的时空范围内，生物在混乱的气味羽流中进行定位。从鲑鱼在无边无际的海洋中洄游，到微生物形成有性孢子，从化学线索中提取时空信息是一种常见的感觉现象。然而，鉴于在生物使用的时空尺度上量化化学线索的难度，发现控制定向行为的化学线索的哪些方面仍然难以捉摸。在这项研究中，我们在定向小龙虾的甲壳上放置了电化学传感器，并以快速的时间速率和小的空间尺度测量了在定向过程中到达嗅觉附肢的浓度波动。我们的结果表明，定向的空间方面（转弯和航向角）受气味线索的时间方面控制。
