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Experimental taxonomy of bulinus gastropoda planorbidae 3. electrophoretic observations on bulinus forskalii bulinus browni bulinus barthi and bulinus scalaris from east africa with additional electrophoretic data on the subgenus bulinus sensu stricto from other parts of africa



Experimental taxonomy of bulinus gastropoda planorbidae 3. electrophoretic observations on bulinus forskalii bulinus browni bulinus barthi and bulinus scalaris from east africa with additional electrophoretic data on the subgenus bulinus sensu stricto from other parts of africa



Steenstrupia 6(13): 177-193



The relative electrophoretic mobilities of the enzymes esterase-D, .alpha.-glycerophosphate dehydrogenase, phosphoglucose isomerase, 3-hydroxybutyrate dehydrogenase, phosphoglucomutase, isocitrate dehydrogenase, nucleoside phosphorylase and glutamate-oxaloacetate transaminase are given for 52 populations belonging to the subgenus Bulinus. The species studied are B. forskalii (Ehrenberg), B. scalaris (Dunker), B. browni (Jelnes), B. barthi (Jelnes), B. senegalensis (Mueller) and B. cernicus (Morelef). The majority of the samples are wild populations of East African origin and in general show a very low amount of genetic variation. Based on data from wild populations, the validity of the species B. browni and B. barthi in relation to B. forskalii is discussed. For a reliable identification of the East African species, the enzyme .alpha.-glycerophosphate dehydrogenase can be used, the relative mobilities of this enzyme being 1.09 for B. forskalii, 1.35 for B. barthi, 1.46 for B. scalaris and 1.65 for B. browni. Indications of enzyme characters which might be useful for identification purposes in other parts of Africa are given. From the genetic structure of the wild populations and from laboratory breeding experiments, it is inferred that species of the B. forskalii complex are using both self- and cross-fertilization in reproduction.

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