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Cryptic diversity in the mtDNA of the ornamental fish Carnegiella strigata
Author(s) -
Schneider C. H.,
Gross M. C.,
Terencio M. L.,
Porto J. I. R.
Publication year - 2012
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2012.03403.x
Subject(s) - biology , mitochondrial dna , tributary , genetic diversity , phylogeography , ecology , population , monophyly , zoology , phylogenetic tree , clade , gene , geography , genetics , demography , cartography , sociology
Mitochondrial DNA ( mtDNA) sequences of the marbled hatchetfish Carnegiella strigata , an ornamental fish exported from the Negro River, was examined to determine its genetic diversity and population structure in blackwater rivers (Negro and Uatumã Rivers) in the central Amazon. Analyses of a 646 bp fragment of the ATPase 6/8 mtDNA gene revealed two monophyletic lineages of C. strigata with considerable genetic distance between them (10–12%), suggesting that these lineages should not be considered a single stock. Furthermore, there were strong differences in the geographical distribution of the lineages. These results indicate a past association between drainages of the Negro and Uatumã Rivers. They also suggest that, in the Negro River, its main tributary, the Branco River, may act as a geographical barrier and potentially an ecological barrier between populations of the middle and lower portions of the river.