Abstract：Abstract：To observe the survival of imported Oncomelania hupensis robertsoni in lake–marshland and water network regions. A study pilot was established in a snail habitat of schistosomiasis -epidemic in Jiangling County, Hubei Province between October, 2009 and April, 2011. O.h.robertsoni snails in wild experiment field are collected and identified, and put into wild experimental area after properly marked. The survival rate of Oncomelania snails are checked in pre-determined time intervals, and the number of imported O.h.robertsoni snails is estimated by mark-recapture method. The results showed that estimated number of Oncomelania hupensis robertsoni Danling strains is 1501.88±134.38 after 6 month survival (2009.10–2010.04). After breeding seasons (2010.07), most Oncomelania snails are from original group, with an estimated total number of Oncomelania snails to be 1587.17±429.09. However, the number drops to 210.34±151.69 in 2010.10. Estimated number of Pengshan strains after breeding seasons (2010.07) is 1112.63±292.48, and drops to 112.23±107.54 in 2010.10..The results suggest that the precision of test(P＞0.05) and theory marked results are consistent.It is indicated that species population of imported O.h.robertsoni decreases during short period of time after moved to lake-marshland and water network regions.
2012, Vol. 28 
