 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Molluscs in the Ubolratana Reservoir, Khon Kaen) ผู้เขียน: Rachadaporn Kittivorachate, Chintana Yangyuen สื่อสิ่งพิมพ์:pdf AbstractThe study was conducted six times between 1999 and 2000. Five stations were chosen covering
all areas of the Ubolratana Reservoir. There were 15 families and 69 species of molluscs with Melanoides
tuberculata as the dominant species. The highest density was the Family Thiaridae at 47 – 76 % annually,
and the rarest was Family Hydrobiidae. Maximum numbers of mollusc were found in front of the reservoir
station. At the depth of 0.5 to 2.0 meters molluscs were widely distributed. The population varies
gradually throughout the year but decreased noticeably in December. The fishing operation and animal
migration were the main cause of mollusc quantity dropping. |