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A COMPARISON OF ALLOZYME HETEROZYGOSITY AND LIFE HISTORY VARIABLES IN FOUR STRAINS OF AFRICAN CATFISH (CLARIAS GARIEPINUS)
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: J. P. Grobler --- , , L. C. Hoffman --- , , South Africa J. F. Prinsloo --- , , South AfricaWe studied allozyme polymorphism and its relation to morphological characteristics in 122 individuals from four lines of African catfish. Starch gel electrophoresis was used to screen 26 loci, of which five were polymorphic. Average heterozygosity levels differed moderately among lines... -
Genetic varaiation within and differentiation between Pseudobarbus quathlambae (Pisces, Cyprinidae) populations from the Senqunyane, Jordane and Bokong Rivers (Central Lesotho)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FH van der Bank JL Rall GJ SteynHorizontal starch-gel electrophoresis was used to obtain baseline genetic information on critically endangered Pseudobarbus quathlambae populations in the Senqunyane, Jordane and Bokong Rivers in the Lesotho Highlands. Allelic frequencies were similar between the populations and generations studied. However, allele classes... -
Large allozyme variation within populations and isozyme differences between Clarias gariepinus and C. ngamensis from the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Herman van der Bank Nico SmitAn allozyme study of 47 Clarias gariepinus and 53 C. ngamensis individuals revealed variation at 11 (57.9%) and eight (40%), out of 19 and 20 loci, respectively. The average heterozygosity of 0.167, 57.9% polymorphism and average of 1.895 alleles at... -
Genetic characterisation of oyster populations along the north-eastern coast of Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Dridi MS Romdhane S Heurtebise ElM Cafsi P Boudry S LapègueThe taxonomy of oysters has been traditionally based on characteristics of the shell. More recently, the analysis of protein and DNA polymorphism has provided a means to overcome difficulties in distinguishing the different species of oysters based solely on shell... -
Quantification of shell banding polymorphism in the East African tree snail Sitala jenynsi (Pulmonata: Ariophantidae)
Item type: Journal Article • Journal: African Zoology • Authors: Peter F. Kasigwa --- Department of Zoology, Tanzania John A. Allen --- School of Biological Sciences, University of Southampton, U.K.In eastern Africa, populations of the tree snail Sitala jenynsi are monomorphic, dimorphic or trimorphic for the width of the upper brown band on their shells.We measured the variation in the width of this band in several populations and analysed... -
Genetic variation in a North African rodent pest, Meriones shawi: microsatellite polymorphism
Item type: Journal Article • Journal: African Zoology • Authors: Aude Lalis --- Département Systématique et Evolution, France Josie Lambourdière --- Service de Systématique Moléculaire, Muséum National d’Histoire Naturelle, FranceMeriones shawi is an ubiquitous and endemic rodent in northern African. This species is considered as an economically important pest because it often damages crops. Moreover, the gerbillines are known to function as reservoirs for a variety of serious human... -
Multiplex-ready PCR assay of SSR marker diversity among quality protein maize inbred parental lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Adeniyi S Atanda --- Department of Agronomy, Nigeria Gbadebo Olaoye --- Department of Agronomy, NigeriaPhenotypic markers have long been used for classification of maize (Zea mays) cultivars. However, because of shortcomings in detecting differences among closely related genotypes, coupled with sensitivity to environmental conditions, molecular marker techniques have been employed in the determination of... -
Geographic variation in West African Agama picticauda: insights from genetics, morphology and ecology
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Sneha Krishnan --- , USA 80526, 4257858934 Caleb Ofori-Boateng --- , , Ghana Matthew K Fujita --- , , USA Adam D Leaché --- , USAWest Africa is a region characterised by high species diversity and endemism, making it an ideal region to study the evolution of genetic and phenotypic differentiation. Species in this region often vary in morphology and genetics; however, the specific drivers... -
Mc1r genotype and plumage colouration in highly polymorphic jackal buzzards, Buteo rufofuscus
Item type: Journal Article • Journal: African Zoology • Authors: Sophia Bam --- School of Life Sciences, South Africa Lorinda Hart --- School of Life Sciences, South Africa Sandi Willows-Munro --- School of Life Sciences, South AfricaEvolution is driven by natural selection acting on variable phenotypic traits. Understanding the molecular basis of those traits is crucial for elucidating the mechanisms of natural selection. The southern African jackal buzzard (Buteo rufofuscus) displays extreme plumage colour polymorphism, with... -
Morphological variations in the African palm weevil, Rhynchophorus phoenicis (F) (Coleoptera: Curculionidae), in Kenya and Uganda
Item type: Journal Article • Journal: African Zoology • Authors: James P Egonyu --- International Centre of Insect Physiology and Ecology, Kenya Alfonce Leonard --- Tanzania Agricultural Research Institute (TARI) Ukiriguru Centre, Tanzania Chrysantus Mbi Tanga --- International Centre of Insect Physiology and Ecology, Kenya Sevgan Subramanian --- International Centre of Insect Physiology and Ecology, KenyaWe investigated morphological differences in the African palm weevil (Rhynchophorus phoenicis) from Kenya (Busia and Kwale) and Uganda using a LEICA EZ4HD stereo microscope and an absolute digimatic caliper. Ten pronotal colour patterns were recorded, of which two (brown with... -
Patterned, plain, and in-between: An assessment of ecogeographic divergence between colour pattern morphs of the common egg-eater Dasypeltis scabra
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jody M. Barends --- University of Johannesburg, South Africa Ielhaam Bassier --- University of the Western Cape, South Africa Emma E. Buckley --- University of the Western Cape, South Africa Cora S. Stobie --- National Museum, South Africa Michael F. Bates --- National Museum, South AfricaIntraspecific variation in colour patterns may reflect adaptive responses to local environmental regimes that favour selection of different trade-offs between visual communication, thermoregulation, and anti-predatory functions. Understanding the drivers of colour pattern variation within species can therefore provide valuable insights... -
Genome-wide genetic-marker variation uncovers potential stock structuring of oceanic tuna (skipjack) and coastal tuna (kawakawa) within the western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FA Mzingirwa --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya NJ McKeown --- Aberystwyth University, United Kingdom GM Okemwa --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya WHH Sauer --- Rhodes University, South Africa JS Halafo --- Instituto Oceanográfico de Moçambique (InOM), Mozambique JG Mshana --- Sokoine University of Agriculture, Tanzania JN Kamau --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya PW Shaw --- Rhodes University, South AfricaTuna and tuna-like species are highly mobile and migratory, and therefore assumed to have single highly connected populations over large ocean regions. However, empirical data on the genetic population structure of such species in the western Indian Ocean (WIO) remain... -
Using wing bar patterns to identify sex in Crowned Eagles Stephanoaetus coronatus: A misleading field characteristic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shane C Sumasgutner --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South Africa Lauren K Common --- University of Vienna, Austria Simon Thomsett --- Soysambu Conservancy, Kenya Colleen T Downs --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South Africa Petra Sumasgutner --- University of Vienna, AustriaAlmost universally, raptors exhibit some degree of sexual size dimorphism, with many species also having substantial sexual dimorphism in plumage patterns. The monophyletic clade ‘booted eagles’ generally do not, except for the Crowned Eagle Stephanoaetus coronatus, which are believed to...