Objective:To reveal subspecies composition of Rhombomy opimus(R.opimus) in Iran. Methods:In this study,field specimens of the gerbil were collected from all its geographical rang in northeast and central parts of Iran...Objective:To reveal subspecies composition of Rhombomy opimus(R.opimus) in Iran. Methods:In this study,field specimens of the gerbil were collected from all its geographical rang in northeast and central parts of Iran and identified on basis of morphological characteristics.Results:Results revealed presence of two subspecies of R.opimus sodalis and R. opimus sargadensis in the country.The first subspecies with brown to hazel-nut color and a size bigger than a typical R.opimus was found only in Golestan province,an isolated colony which is located in plains of north slopes of Alborz Chain Mountains of the country,connected with the Turkmenistan.The subspecies of R.opimus sargadensis with a yellowish color and similar size as a typical R.opimus was found in all other areas of the great gerbil distribution in Iran.There was a distinct topographic difference but similar ectoparasites between colonies of the two subspecies in the study area.Conclusions:Further ecological and genetic investigations are required for more detailed description of the R.opimus subspecies range and structure.The R.opimusPhlebotomus papatasi-Leishmania major association and the ZCL severity and outcome in hosts are discussed.展开更多
Based on population surveys of great gerbil(Rhombomys opimus)by blocking up the mouseholes and inspecting the opened ones conducted in three different habitats in Tengenor,Damaolianheqi,Baotou City of Inner Mongolia i...Based on population surveys of great gerbil(Rhombomys opimus)by blocking up the mouseholes and inspecting the opened ones conducted in three different habitats in Tengenor,Damaolianheqi,Baotou City of Inner Mongolia in February,April,June,August,October and December from 2003 to 2005,relationship between density of the great gerbil and rainfall was analyzed.Results showed that population densities of the great gerbil vary with seasons and years,and its density curves have a single peak value every year.A regression equation Y8=-8.7202 + 0.8806X(df=16,r=0.5394>r0.05=0.468)resulted from analyzing the relationship of the density to the rainfall the previous month indicates that the population size of the great gerbil was positively related to the previous month’s rainfall.The density occurring in August and October can be predicted by that in April.The forecasting models for the density in August and October are Y8=-1.0925+2.6133X4(df=6,r=0.9776>r0.01=0.834)and Y10=-0.2097+2.4992X4(df=6,r=0.9672>r0.01=0.834)respectively.展开更多
基金supported by grants 87-03-27-7836 from Tehran University of Medical Sciences to Mohammad A.Oshaghi
文摘Objective:To reveal subspecies composition of Rhombomy opimus(R.opimus) in Iran. Methods:In this study,field specimens of the gerbil were collected from all its geographical rang in northeast and central parts of Iran and identified on basis of morphological characteristics.Results:Results revealed presence of two subspecies of R.opimus sodalis and R. opimus sargadensis in the country.The first subspecies with brown to hazel-nut color and a size bigger than a typical R.opimus was found only in Golestan province,an isolated colony which is located in plains of north slopes of Alborz Chain Mountains of the country,connected with the Turkmenistan.The subspecies of R.opimus sargadensis with a yellowish color and similar size as a typical R.opimus was found in all other areas of the great gerbil distribution in Iran.There was a distinct topographic difference but similar ectoparasites between colonies of the two subspecies in the study area.Conclusions:Further ecological and genetic investigations are required for more detailed description of the R.opimus subspecies range and structure.The R.opimusPhlebotomus papatasi-Leishmania major association and the ZCL severity and outcome in hosts are discussed.
文摘Based on population surveys of great gerbil(Rhombomys opimus)by blocking up the mouseholes and inspecting the opened ones conducted in three different habitats in Tengenor,Damaolianheqi,Baotou City of Inner Mongolia in February,April,June,August,October and December from 2003 to 2005,relationship between density of the great gerbil and rainfall was analyzed.Results showed that population densities of the great gerbil vary with seasons and years,and its density curves have a single peak value every year.A regression equation Y8=-8.7202 + 0.8806X(df=16,r=0.5394>r0.05=0.468)resulted from analyzing the relationship of the density to the rainfall the previous month indicates that the population size of the great gerbil was positively related to the previous month’s rainfall.The density occurring in August and October can be predicted by that in April.The forecasting models for the density in August and October are Y8=-1.0925+2.6133X4(df=6,r=0.9776>r0.01=0.834)and Y10=-0.2097+2.4992X4(df=6,r=0.9672>r0.01=0.834)respectively.
