NDLI: Comparative population structure of three snook species (Teleostei: Centropomidae) from the eastern central Pacific

Content Provider	Springer Nature Link
Author	Díaz Jaimes, Píndaro Sandoval Castellas, Edson Uribe Alcocer, Manuel
Copyright Year	2007
Abstract	Three snook species, Centropomus viridis, Centropomus medius, and Centropomus robalito, from the eastern central Pacific, representing three of the four proposed phyletic lineages in the genus, were analyzed for genetic variability by means of allozyme and RAPD to evaluate the divergence between populations at different levels of dispersal ability and to evaluate the importance of barriers to dispersal in the population subdivision and genetic diversity. Levels of genetic diversity among species estimated by allozymes were similar and consistent with the observed levels of differentiation in marine fish species. Mean heterozygosity ranged from 0.089 for C. viridis to 0.10 for C. robalito. Genetic diversity for the snook species studied was slightly higher than the mean estimation reported in allozymes for 106 marine fish (0.055) and for anadromous fish species (0.043 to 0.057). Multilocus allele frequency homogeneity tests and population-subdivision estimates for both allozyme and RAPD markers revealed the existence of population structure in C. viridis and C. medius, in coincidence with geographic separation of samples, whereas no divergence was detected in C. robalito. This finding may be attributed to the greater population size of C. robalito, which originated by a recent population range expansion, and hence the potential for dispersal is mediated by larval drift. Fluctuations in population size and population range expansion are used to explain discrepancies between levels of genetic diversity and population structure in the studied species.
Starting Page	380
Ending Page	387
Page Count	8
File Format	PDF
ISSN	13418998
Journal	Ichthyological Research
Volume Number	54
Issue Number	4
e-ISSN	16163915
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-11-26
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Population structure Genetic divergence Genetic markers Population size Zoology Ecology Animal Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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