The Distribution and Abundance of Rodents in Alleltu Woreda, Oromia Region, Ethiopia.

No Thumbnail Available



Journal Title

Journal ISSN

Volume Title


Addis Ababa University


The study on the distribution and abundance of rodents was canied out inside and outside agricultural areas at Alleltu peasant association fi'om Oct. 2002 to April, 2003. The study was conducted in three live trapping grids inside the wheat, bean and lentil field in agricultural areas. A survey study was also conducted in different habitats outside the cultivated fields using live and snap h·aps. During the whole study period, a total of 260 and 61 captures of rodents were made inside and outside the cultivated fields respectively, by Capture Mark Recaphlre (CMR) method. A total of321 specimens were h'apped fi'om 3762 trap nights. The rodent species were: Maslomys lIalatensis, MilS mahomel alld Arvicallihis abyssillicl/s. Population size estimate on the live trapping grids was made using minimum number of animals (MNA) method as the numbers of recaptures were very few to use the Stochastic Jolly- Seber model. Population size fluctuated in the different stages of crops. It reached its peak when the crops were maturing and declined after harvest. Outside the cultivated field, the snap trapping resulted in zero capture while the live h'apping showed an increase in the number of rodents fi'om March to April. Biomass varied in response to fluctuation of population size and differences in abundance of each species in the tln'ee griqs. Most of the distribution and abundance of rodents showed significant temporal variation. The spatial variation of rodents showed that M Ilalatellsis was the dominant species in the cultivated fields. But, A. abyssilliC/ls was revealed to be in a relatively higher number outside the cultivated field around the bushes.