ABSTRACT
Arisuryanti, T. 2000. A preliminary study of genetic variation of Galaxias olidus (Salmoniformes : Galaxiidae) in western Victoria, Australia. Biologi2 (9): 487-498.
Four populations (two western populations : Fitzroy River and Scrubby Creek, and two eastern populations : Matthews Creek and Barwon River) of the mountain galaxias, Galaxias olidus, were investigated for genetic variation at 38 loci encoding electrophoretically detectable proteins recorded from 23 system enzymes and general proteins using allozyme electrophoresis methods. Genetic variation was concentrated at only three loci : Malate dehydrogenase (Mdh), Glycerol-3-phosphate dehydrogenase-1 and 2 (Gpdh-1 and Gpdh-2). Fixed allozyme differences were found between the eastern populations and the western populations at Mdh and Gpdh-2 loci while within the western populations were observed at one locus (Gpdh-1). On the basis of genetic similarity values, these four populations are still considered to be conspecific (1=0.95) nonetheless leading to incipient speciation.
Key words: genetic variation â Galaxias allozyme electrophoresi
