Chromosome Study Of Bats From Different Localities In Ethiopia

Bats were captured by using nets and hand picking and thenrnchromosome preparations were made from bone marrow cells according tornLee and Elder’s (1980) method cited in Hillis et al. (1996) with somernmodifications. Somatic metaphase chromosomes of bat specimens collectedrnfrom Arbaminch, Koka, Merehabete and Ziway regions in Ethiopia werernstudied. The specimens were identified belong to the following families andrnspecies. Pipistrellus pipistrellus and Scotophilus dinganii or S. viridisrn(family Vespertilionidae), Micropteropus pusillus (family Pteropidae),rnChaerephone pumila (family Molossidae) and a taxonomically yetrnunidentified specimen collected from Merehabete region. Five karyotypes,rndiffering in chromosome number, fundamental number and chromosomernmorphology were identified. Accordingly, the karyotype of Micropteropusrnpusillus consists of 2n=35, FN=70 and in rare cases 2n=36, FN =72 with allrnthe chromosomes being biarmed; Pipistrellus pipistrellus 2n=36, FN=52rnwith metacentric and acrocentric chromosomes; Scotophilusrndinganii(S.viridis) 2n=36, FN=54 with metacentric/ acrocentricrnchromosomes; Chaerephon pumila 2n=48, FN=60 with metacentric,rnacrocentric and telocentric chromosomes;Merehabete specimenrn2n=42,FN=82 with 40 biarmed and two telocentric chromosomes. Thernpresent karyotypes differed from previous reports either in 2n number, orrnfundamental numbers or chromosome morphology.rnKey words or phrases: Bat, 2n number, Fundamental number, Karyotype,rnEthiopia, Chromosome.

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