Life History of Baetiella macani(Ephemeroptera:Baetidae)in a Feeder Stream of the Three Gorges Reservoir
Investigation of aquatic insect growth process plays an important role in understanding the biological characteristics of aquatic organisms and the ecological environment status in river,and can also provide scientific reference for constructing and improving the ecological and environmental protection system of rivers in the study area.The study researched the life history of Baetiella macani in Pangxie Stream,which feeds into the Xiangxi River Bay.Monthly samples of larvae were taken from January to December,2017.The life history was studied using the size-frequency method and checked by the effective accumulative temperature for larval development.B.macani was determined to exhibit trivoltinism,having an overwintering generation and two summer generations.The larval production interval of the overwintering generation was three to four months,the accumulated degree days for larval development were estimated to be 1286℃.The larval production interval of the summer generations was one to two months,the accumulated degree days for larval development were estimated to be 757℃.The results increased the life history database of aquatic insects in China,and presented the life history traits of the genus Baetiella for the first time.
aquatic insectthe Xiangxi Riverlife cyclethe effective accumulative temperaturesize frequency method
NETL
NSTL
万方数据
维普
