Study Of Rainbow Trout's Trammel Net Breeding Technology At Liujiaxia Reservoir In Gansu

Rainbow trout,named Sanwenyu either.It's original producing area is Alaska's ghyll until 1886 year.Afterward,East area of America,Japan,Europe, Oceania,South America and East Asia begin also.Rainbow trout is breeding abroad in world now.Rainbow trout live in cold,oxygenful and iimpidity water in ghyll.Hydrophily insect,carapace,fingerling,polliwog and grain feedingstuff all can be their food.Rainbow trout is a kind can be breeding in intensive got-up environment.Liujiaxia reservoir lie in northwest in china.There is many gulf and abundance resource of cold water.There is great preponderance to develop trammel net breeding.Since 1980 year,the trying of rainbow trout's trammel net breeding didn't succeed until 1996 year.The succeed come from the cooperation between Gansu aquatic product institute and Gansu Liujiaxia reservoir fishery. Because many information haven't been gained,result many losing,such as water temperature,water quality and prescription of feedingstuff,prevention of disease,etc.The aim of the study of rainbow trout,s trammel net breeding technology at Liujiaxia reservoir is to offer breeding technique and needing information.Probe into suiting mode to breed rainbow trout at Liujiaxia reservoir.This study summarized the actuality,trend and foreground of breeding rainbow trout.Providing decision-making gist for government and investor;it discovered that suiting period of water temperature is 203 day,and unsuiting period is 162 day a year in Liujiaxia;the time to put fry in reservoir is the middle ten days of April,to September 10 is a period to sink down case and stop food, and the trammel net should be drag up on November.Diaphaneity,quantity of dissolving oxygen,biochemistry needing quantity of dissolving oxygen,general Iron ion and things to float of Liujiaxia reservoir fit breeding of rainbow trout. Stick out a mile,merchandise fish should be drag up before July 20,then the second produce should begin on the last ten days of August,fry of 150g can be vended on the last ten days of November.So avoiding living through the winter at reservoir.The experimentation provided feedstuff prescription in reason,reduced the coefficient of bait material,so advanced the breeding benefit.This study offered binding control measure to prevention fish diseases,and screen out some allowable,effective medicament.Further more,this study offered some notice for general manage and fry choice.It a guidance of rainbow trout,s trammel net breeding at Liujiaxia reservoir...