Salinity tolerance of 4 common guppy fish under various temperatures
ZHAO Yue， XUE Xiao-qiang， WANG Shuai， ZHAO Lin， REN Tong-jun， JIANG Zhi-qiang， HAN Yu-zhe
College of Fisheries and Life Science,Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Key Laboratory of Fish Applied Biology and Aquaculture in North China, Liaoning Province,Dalian Ocean University, Dalian 116023, China
Abstract: Salinity tolerance of 4 common guppy fish Poeciliareticulate was conducted at various temperatures in order to provide convenience for salt treatment of pathogens in ornamental fish culture. The leopard guppy, ivory white guppy, red fan guppy and ice blue guppy were reared in an aquarium at salinity 0, 20, and 28 and water temperature of 16, 22, and 28 ℃ to evaluate the changes in salinity tolerance at different temperatures. The results showed that the guppies had short half lethal time (LT50) at high salinity(S=28) and that the significant interactive effects of temperature and salinity on survival were observed in leopard guppy and red fan guppy (P<0.05). Raising the water temperature led to significant increase in the salinity tolerance of the two guppies at low salinity (S=20). At high salinity(S=28), however, raising the water temperature resulted in significant decline in salinity tolerance of two guppies, with significant increase in salinity tolerance at low water temperature in the two guppies, indicating that temperature affected salinity tolerance of guppies to a certain extent.
2018, Vol. 33 
