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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Population structure of two closely related pelagic cichlids in Lake Victoria, Haplochromis pyrrhocephalus and H. laparogramma
Gene, Volume 441, No. 1-2, Year 2009
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Description
Cichlid fishes in Lake Victoria show spectacular diversification that is thought to be recent. Therefore, by investigating those fishes, we may be able to elucidate recently completed or ongoing speciation processes. We studied the population structures of two closely related pelagic cichlid species, Haplochromis pyrrhocephalus and H. laparogramma, using a mitochondrial DNA locus and 12 nuclear microsatellite loci as putative neutral markers. Ten and two populations of H. pyrrhocephalus and H. laparogramma, respectively, were sampled from the southern part of Lake Victoria. We grouped those 12 populations into four mutually differentiated regional populations, one of which consisted of the two H. laparogramma populations. The levels of differentiation were substantial at the mitochondrial locus (FST = 0.03-0.54), but very low at microsatellite loci (RST = 0.008-0.116). The data from both types of loci indicated that the regional population of H. laparogramma was first separated from those of H. pyrrhocephalus if we set aside one erratic population of H. pyrrhocephalus. The data also suggested recent population expansions of the two species, the time scales for which were estimated to be on the order of 104-105 years. These data suggested that dynamic speciation processes accompanied occasional spawning of new species and population size changes in this lake. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Maeda, Kaoru
Japan, Fukuoka
Kyushu University
Takeda, Miyuki
Japan, Fukuoka
Kyushu University
Kamiya, Koichi
Japan, Fukuoka
Kyushu University
Aibara, Mitsuto
Japan, Tokyo
Tokyo Institute of Technology
Mzighani, Semvua Isa
Japan, Tokyo
Tokyo Institute of Technology
Tanzania, Dar es Salaam
Tanzania Fisheries Research Institute Tafiri
Nishida, Mutsumi
Japan, Tokyo
The University of Tokyo
Mizoiri, Shinji
Japan, Tokyo
Tokyo Institute of Technology
Sato, Tetsu
Japan, Tokyo
Tokyo Institute of Technology
Terai, Yohey
Japan, Tokyo
Tokyo Institute of Technology
Okada, Norihiro
Japan, Tokyo
Tokyo Institute of Technology
Tachida, Hidenori
Japan, Fukuoka
Kyushu University
Statistics
Citations: 14
Authors: 11
Affiliations: 4
Identifiers
Doi:
10.1016/j.gene.2008.11.008
ISSN:
03781119
Research Areas
Cancer
Genetics And Genomics
Study Design
Cross Sectional Study