イワミ　ノリオ   岩見　徳雄    所属   理工学部 総合理工学科    職種   准教授
言語種別	英語
発行・発表の年月	2022/12
形態種別	学術雑誌
査読	査読あり
標題	Statistical analysis of the effects of environmental factors and fish species on class-sorted phytoplankton composition in aquaculture ponds in northern Thailand
執筆形態	共著
掲載誌名	Maejo International Journal of Energy and Environmental Communication
掲載区分	国外
出版社・発行元	Maejo University in Thailand
巻・号・頁	4-3,pp.32-38
担当範囲	特定不可能
国際共著	国際共著
著者・共著者	Truc-Ly Le-Huynh, Norio Iwami, Niwooti Whangchai, Redel Gutierrez, Kazuya Shimizu, Tomoaki Itayama*
概要	This study statistically investigated these relationships in aquaculture ponds. Data collected at 21 tilapia and 13 catfish ponds in September 2009, December, and March 2010 in northern Thailand were used for the analysis. The statistical analysis showed that PO4-P and NH4-N concentrations in catfish ponds were significantly higher than in tilapia ponds. The cyanobacterial abundance in catfish ponds was significantly greater than in tilapia ponds. The best model selected by AICc included season and pond type as factors influencing cyanobacterial abundance but not nutrients. Furthermore, it was hypothesized that cyanobacterial abundance was reduced in March because the predation of cyanobacteria by tilapia may be encouraged at high temperature.