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[Objective] This paper aimed to the tolerance and behavioral changes of Triplophysa (Itedinichthys) yarkandensis (Day) under the salinity and alkalinity.[Method] Triplophysa (Itedinichthys) yarkandensis (Day) was used as objects, defining a low-temperature environment (13 ± 0.5) Ti, their preferences under the gradient concentrations of salinity (S)/alkalinity (Aik ) were determined, and the effects of salinity (S)/alkalinity (Aik) toxicity on the Triplophysa (iledinichthys) yarkandensis (Day) in Tarim river were studied.[Result] When Aik was around pH 6.5 -7.5 with temperature(13 ± 1 ) Ti, the TC%) of S to T.(H.)yarkandensis (Day) were 20.0870 %c, 16.2490 %c, 13.3300 %c, 12.5680 %c and 12.3930 %c at 12, 24, 48, 72 and 96 hours, respectively, and the safe S was 4.1676 %c.The LC50 of Alkto T.(H.) yarkandensis (Day) were 12.1590, 9.9776, 9.5076, 8.6485 and 4.5220 g · I.1 at 12, 24, 48, 72 and 96 hours, respectively, and the safe Aik was 2.7179 g · L-l.Among them, 4 %c was the main preference area, and 3 -4 g · L-l was the range of Aik preference.In conclusion, although the low temperature of S/Alk toxicity tolerance slowed, behavior preferences were also different of T.(II.) yarkandensis (Day), and the S/Alk stress of Tarim water salinization seriously affected the growth and development of T.(II.) yarkandensis (Day).[Conclusion]The present study would provide a scientific basis for the enhancement and protection of T.(II.) yarkandensis (Day). [ABSTRACT FROM AUTHOR]

The effects of salinity, alkali and weight on oxygen consumption and ammonia excretion rate of Triplophysa (Hedinichthys) yarkandensis (Day) were studied by means of the experimental ecology method in laboratory. Results showed that salinity, alkali and weight had significant effects on the oxygen consumption and ammonia excretion rate( P<0.05), when salinity was 5 g · L-1and the oxygen consumption rate of T. H. yarkandensis (Day) increased as the salinity decreased. The ammonia excretion rate of T. H. yarkandensis (Day) decreased as the salinity increased, the ammonia excretion rate was 0. 084 mg · （g · h）-1 when the salinity was 20 g · L-1. The oxygen consumption rate from the first of T. H. yarkandensis (Day), then as the alkali decreased, the alkali maximum was 11.922 mmol · L-1, and when alkali was 31.922 mmol · L-1the ammonia excretion rate from the first of T. H. yarkandensis (Day) increased. The oxygen consumption rate of T.H. yarkandensis (Day) increased as weight increased, and ammonia excretion rate of T. H. yarkandensis (Day) increased as weight decreased. The O/N ratio of T. H. yarkandensis (Day) increased with the salinity and alkali decreased, and the O/N ratio T. H. yarkandensis(Day) increased as weight increased, when the salinity was 5 g · L-1and the alkali was 11. 922 mmol · L-1. Therefore, so that salinity, alkali and weight were involved in osmoregulation of T. H. yarkandensis (Day) adapting for different salinity, to change the oxygen consumption and ammonia excretion rate of T. H. yarkandensis (Day). It is good at the oxygen consumption and ammonia excretion rate of T. H.yarkandensis (Day), when the salinity is 5 g · L-1and the alkali is 11.922 mmol · L-1, may be related to the Na+/K+-ATP. [ABSTRACT FROM AUTHOR]