TY - JOUR
T1 - Spatial and temporal mitochondrial DNA genetic homogeneity of dolphinfish populations (Coryphaena hippurus) in the eastern central Pacific
AU - Píndaro, Díaz Jaimes
AU - Manuel, Uribe Alcocer
AU - Sofía, Ortega García
AU - Durand, Jean Dominique
N1 - Funding Information:
This study was funded by the Programa de Apoyo a Proyectos de Investigación e Innovación Tecnológica, DGAPA-UNAM, grant IN227403. We are grateful to Erika Mojica Quezada, Evangelina Castillo Olguín, Mónica Domínguez López, and Francisco Sancho for collecting and processing samples. Thanks to the two anonymous reviewers who provided valuable comments and improved notably the manuscript and to Ellis Glazier for editing the English-language text.
PY - 2006/9
Y1 - 2006/9
N2 - Dolphinfish (Coryphaena hippurus) samples were collected over four consecutive years from four locations in the eastern central Pacific to evaluate the genetic variation in a 751 bp segment of the mitochondrial NADH subunit 1 (ND1) to test for the presence of genetic population structure. Sequence analyses revealed no significant differences among collections from the same location in the different years sampled nor between locations. Mismatch distributions, estimations of population expansion parameters, and neutrality tests revealed significant fluctuations in population size in coincidence with past glacial and interglacial periods during the late Pleistocene. The low levels of nucleotide diversities and shallow coalescence of mtDNA genealogies observed were coincident with the estimated demographic parameters and neutrality tests, in suggesting the presence of important past population size fluctuations or range expansion. The prevention of the accumulation of deep lineages independently on how it was originated, probably delayed the emergence of a population divergence process which might account for the lack of genetic differences detected.
AB - Dolphinfish (Coryphaena hippurus) samples were collected over four consecutive years from four locations in the eastern central Pacific to evaluate the genetic variation in a 751 bp segment of the mitochondrial NADH subunit 1 (ND1) to test for the presence of genetic population structure. Sequence analyses revealed no significant differences among collections from the same location in the different years sampled nor between locations. Mismatch distributions, estimations of population expansion parameters, and neutrality tests revealed significant fluctuations in population size in coincidence with past glacial and interglacial periods during the late Pleistocene. The low levels of nucleotide diversities and shallow coalescence of mtDNA genealogies observed were coincident with the estimated demographic parameters and neutrality tests, in suggesting the presence of important past population size fluctuations or range expansion. The prevention of the accumulation of deep lineages independently on how it was originated, probably delayed the emergence of a population divergence process which might account for the lack of genetic differences detected.
KW - GENE flow
KW - Historical demography
KW - Population expansion
KW - Subpopulations
UR - http://www.scopus.com/inward/record.url?scp=33751100901&partnerID=8YFLogxK
U2 - 10.1016/j.fishres.2006.04.015
DO - 10.1016/j.fishres.2006.04.015
M3 - Artículo
SN - 0165-7836
VL - 80
SP - 333
EP - 338
JO - Fisheries Research
JF - Fisheries Research
IS - 2-3
ER -