Add To Calendar 21/09/2023 16:00:0021/09/2023 16:15:00Europe/ViennaAquaculture Europe 2023INTROGRESSIVE HYBRIDIZATION LEVELS OF TILAPIINES SPECIES IN LAKE VICTORIA BASIN, KENYA INFERRED FROM MICROSATELLITE AND MITOCHONDRIAL DNA GENOTYPING BASED ON NEXT-GENERATION SEQUENCINGCongress LoungeThe European Aquaculture Societywebmaster@aquaeas.orgfalseDD/MM/YYYYaaVZHLXMfzTRLzDrHmAi181982
INTROGRESSIVE HYBRIDIZATION LEVELS OF TILAPIINES SPECIES IN LAKE VICTORIA BASIN, KENYA INFERRED FROM MICROSATELLITE AND MITOCHONDRIAL DNA GENOTYPING BASED ON NEXT-GENERATION SEQUENCING
Gerald Kwikirizaaeg* , Thapasya Vijayana , Papius Dias Tibihikab , Manuel Curtoca , Gerold Winklerd , Juliet Kattabi Nattabie , John Kariukif, Harald Meimberga
aInstitute for Integrative Nature Conservation Research, University of Natural Resources and Life Sciences Vienna (BOKU), Gregor-Mendel-Straße 33, 1180 Vienna, Austria
bNational Fisheries Resources Research Institute, Aquaculture Research and Development Center, P. O. Box 530, Kampala, Uganda
cMARE-Marine and Environmental Sciences Centre, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
dInstitute of Hydrobiology and Water Management, University of Natural Resources and Life Sciences, Vienna (BOKU) Gregor-Mendel-Straße, 33 1180 Vienna, Austria
eMakerere University Kampala, P. O. Box, 7062, Kampala
fDepartment of Biochemistry, University of Nairobi, P. O. Box, 30197-00100, Nairobi, Kenya
gNational Agricultural Research Organization, P. O. Box 421, Kabale, Uganda
ABSTRACT
Despite their high abundance and species richness, tilapiines have been compromised by various factors especially overfishing, climate change, and un-controlled fish translocations. Fish translocations have negatively impacted native tilapiine populations through competition, predation, hybridization, and introgression compromising their genetic integrity. The hybridization levels of different tilapiines in the Lake Victoria basin remains an understudied aspect relatively. The study utilized nuclear microsatellite and mitochondrial DNA (mtDNA ) genetic markers to investigate hybridization signals and compare the genetic diversity of different tilapiines in Lake Victoria, Kenya, using next-generation sequencing. Low levels of hybridization from Oreochromis niloticus into other Oreochromis species were detected by Bayesian clustering analysis and principal coordinate analysis (PCoA ). The results contribute to the need for conservation measures of these fish species.