濟州島의 外都川에서 Parioglossus dotui 3個體가 採集되었다. 이 記錄은 韓國에서 처음일 뿐아니라 本種이 日本以外의 곳에서 얻어진 最初의 記錄이다. 採集된 標本을 記載하며 新韓名으로 꼬마청황을 提唱한다. 이들 標本의 形質은 日本産의 것과 잘 一致했다. 外都川에 있어서 採集地點은 海水의 影響을 받을 可能性이 있는 地點이며, 本種이 작은 무리를 짓고 游泳하는 事實이 觀寮되었다.

The ratio of cellulolytic bacteria to heterotrophic bacteria were about 24.8∼67.6% in Han River. It was identified that Aeromonas sp. DJ-1 was the highest cellulolytic bacteria. Cellulase activity of Aeromonas sp. DJ-1 decreased about 55-64%, 45∼70% by treatment of phenoxy herbicide 2,4-D, 2,4,5-T, respectively. 2,4,5-T degrading bacteria were not isolated, but 2,4-D degrading bacteria were about 0.0001 ∼0.0016% ranges among total heterotropic bacteria. The two isolates, HUD21 and HUD51, capable of degrading of 2,4-D, were identified as Pseudomonas sp. and Agrobacter sp., respectively. These isolates in the ability of biodegradation of 2,4-D shown the degradation rate of 99% after 2 days, and the 2,4-D degrading optimum temperatures are 30˚C for HUD21, 37˚C for HUD51. The genes encoding enzymes of 2,4-D degradation were located at plasmid.