Hiyama Atsuki, Otaki Joji M
.The BCPH Unit of Molecular Physiology, Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan.
Laboratory of Conservation Ecology, Faculty of Science and Engineering, Chuo University, Tokyo 112-8551, Japan.
Insects. 2020 Feb 14;11(2):122. doi: 10.3390/insects11020122.
The pale grass blue butterfly (Lepidoptera: Lycaenidae) has been used as an environmental indicator species for radioactive pollution after the Fukushima nuclear accident. Here, based on the one-individual tracking method in the field, we examined dispersal-associated and other behavioral traits of this butterfly, focusing on two subspecies, in mainland Japan and in Okinawa. The accumulated distances in the adult lifespan were 18.9 km and 38.2 km in mainland and Okinawa males, respectively, and 15.0 km and 7.8 km in mainland and Okinawa females, respectively. However, the mean distance from the starting point was only 24.2 m and 21.1 m in the mainland and Okinawa males, respectively, and 13.7 m and 7.4 m in the mainland and Okinawa females, respectively. Some quantitative differences in resting and feeding were found between subspecies and between sexes. The ARIMA (autoregressive integrated moving average) model indicated that the dispersal distance was 52.3 m (99% confidence interval value of 706.6 m) from the starting point in mainland males. These results support the idea that despite some behavioral differences, both subspecies of this butterfly are suitable as an environmental indicator because of the small dispersal ranges.
在福岛核事故之后，淡青斑蝶（鳞翅目：灰蝶科）被用作放射性污染的环境指示物种。在此，基于野外单个体追踪方法，我们研究了这种蝴蝶的扩散相关行为和其他行为特征，重点关注日本本土和冲绳的两个亚种。日本本土和冲绳雄性蝴蝶在成虫寿命期间的累计飞行距离分别为18.9千米和38.2千米，日本本土和冲绳雌性蝴蝶分别为15.0千米和7.8千米。然而，日本本土和冲绳雄性蝴蝶距起点的平均距离分别仅为24.2米和21.1米，日本本土和冲绳雌性蝴蝶分别为13.7米和7.4米。在亚种之间以及性别之间，在静息和取食方面发现了一些数量差异。自回归积分滑动平均（ARIMA）模型表明，日本本土雄性蝴蝶距起点的扩散距离为52.3米（99%置信区间值为706.6米）。这些结果支持了这样一种观点，即尽管存在一些行为差异，但由于这种蝴蝶的扩散范围较小，其两个亚种都适合作为环境指示物种。
