تنوع و تعدد گونه هاي جونده در شهرستان خرم آباد و بخش هاي تابعه

Variation and Frequency of Rodent Species in Khoram - abad District with Different Climates

Rodents are the biggest order among mammals and are one of the successful groups among animals. They are able to transmit more than 35 diseases to human and cause huge damages on economical situation of many countries. Therefore exact identification and application of appropriate control measures of rodents in each locality are essential. This study was conducted to identify species composition of rodents in Lorestan district from June 2002 till April 2003.Sample collections were carried out at 24 fixed and a new random localities each month and each time 3 different Sherman traps (30-50) were used. Specimens were killed by chloroform, weighed and morphological characters measured and then they were subjected to autopsy taxidermy and identification methods. Total number of rodents was 168, which belonged to 2 suborder, 3 family, 3 sub families, 9 genus and 9 species. Meriones persicus with 38.09% was the most prevalent and Sciurus anomalous with 1.19% was the rarest species among specimens. Results showed that number species or biodiversity was at highest level 7 species at 1800-2000m latitude in Zagheh region, where at least diversity 2 species was seen at 800-1200m latitude in Waysian and Chegini regions. These differences werenʹt significant when analyzed by Cochran (P=0.088, a=0.05) and Freedman tests, but when analyzed by Pearson regression rate (P=0.89, a=0.05). There was a positive and significant relation between latitude and biodiversity. These results should be t hat confirmed b y further studies i n other regions with different climates.