Mitochondrial DNA analysis of population structure in the Atlantic croaker, Micropogonias undulatus (Perciformes: Sciaenidae)
| Author(s) | Lankford, Thomas E. Jr. | |
| Author(s) | Targett, Timothy E. | |
| Author(s) | Gaffney, Patrick M. | |
| Ordered Author | Thomas E. Lankford Jr., Timothy E. Targett, Patrick M. Gaffney | |
| UD Author | Lankford, Thomas E. Jr. | en_US |
| UD Author | Targett, Timothy E. | en_US |
| UD Author | Gaffney, Patrick M. | en_US |
| Date Accessioned | 2015-12-09T15:59:35Z | |
| Date Available | 2015-12-09T15:59:35Z | |
| Publication Date | 1999 | |
| Description | Publisher's PDF. | en_US |
| Abstract | Genetic population struc- ture in Atlantic croaker ( Micropogonias undulatus Linnaeus) was examined by using the polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) analysis of mi- tochondrial DNA (mtDNA). Juvenile croaker from three U.S. Atlantic locali- ties (Delaware, North Carolina, and Florida) and one Gulf of Mexico local- ity (Louisiana) were screened to docu- ment the magnitude and spatial distri- bution of mtDNA variation in M. undulatus ; to evaluate the integrity of Cape Hatteras, North Carolina, as a genetic stock boundary; and to estimate levels of gene flow among Atlantic lo- calities to provide an improved basis for future decisions regarding coastwide management of this fishery resource. RFLP analysis of the ATPase 6 and D-loop mtDNA regions revealed a total of 15 composite haplotypes in 93 indi- viduals. Monte Carlo simulations re- vealed no geographic heterogeneity in mtDNA haplotype frequencies among Atlantic localities and no evidence that juveniles collected north and south of Cape Hatteras originated from sepa- rate gene pools (net sequence diver- gence=–0.002%). There was significant heterogeneity between Atlantic and Gulf of Mexico samples, suggesting re- stricted gene flow between these two re- gions. Analysis of molecular variance also indicated regional (Atlantic versus Gulf) population structure, but pro- vided no evidence that Cape Hatteras represents a genetic stock boundary. AMOVA indicated relatively high gene flow ( N e m U = 12–23 effective female mi- grants per generation) among Atlantic localities. These findings are consistent with 1) a single genetic stock of M . undulatus on the Atlantic coast and 2) separate, weakly differentiated stocks in the Atlantic and Gulf of Mexico. | en_US |
| Department | University of Delaware. School of Marine Science and Policy. | en_US |
| Citation | Lankford et al.: Population structure in Micropogonias undulatus. Fish. Bull. 97:884-890 (1999) | en_US |
| ISSN | 0090-0656 | en_US |
| URL | http://udspace.udel.edu/handle/19716/17288 | |
| Language | en_US | en_US |
| Publisher | United States. National Marine Fisheries Service. | en_US |
| dc.source | Fishery Bulletin | en_US |
| dc.source.uri | http://fishbull.noaa.gov/ | en_US |
| Title | Mitochondrial DNA analysis of population structure in the Atlantic croaker, Micropogonias undulatus (Perciformes: Sciaenidae) | en_US |
| Type | Article | en_US |
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