Electrophoretic Determination of Populations of the Striped Bass, Morone saxatilis, in the Upper Chesapeake Bay

Morgan, Raymond P.; Koo, Ted S. Y.; Krantz, George E.

doi:10.1577/1548-8659(1973)102<21:edopot>2.0.co;2

Cited by 30 publications

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“…Morgan et al (1973) first used serum proteins to show differentiation among striped bass sampled in Maryland tributaries. A later study of fish from Maryland tributaries and the Rappahannock River based on serum proteins as well as the G-3-PDH protein showed no evidence for genetic populations (Sidell et al, 1980).…”

Section: Introductionmentioning

confidence: 99%

Reconciling nuclear microsatellite and mitochondrial marker estimates of population structure: breeding population structure of Chesapeake Bay striped bass (Morone saxatilis)

2005

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Comparative analyses of nuclear and organelle genetic markers may help delineate evolutionarily significant units or management units, although population differentiation estimates from multiple genomes can also conflict. Striped bass (Morone saxatilis) are long-lived, highly migratory anadromous fish recently recovered from a severe decline in population size. Previous studies with protein, nuclear DNA and mitochondrial DNA (mtDNA) markers produced discordant results, and it remains uncertain if the multiple tributaries within Chesapeake Bay constitute distinct management units. Here, 196 young-of-the-year (YOY) striped bass were sampled from Maryland's Choptank, Potomac and Nanticoke Rivers and the north end of Chesapeake Bay in 1999 and from Virginia's Mataponi and Rappahannock Rivers in 2001. A total of 10 microsatellite loci exhibited between two and 27 alleles per locus with observed heterozygosities between 0.255 and 0.893. The 10-locus estimate of R ST among the six tributaries was À0.0065 (95% confidence interval À0.0198 to 0.0018). All R ST and all but one y estimates for pairs of populations were not significantly different from zero. Reanalysis of Chesapeake Bay striped bass mtDNA data from two previous studies estimated population differentiation between y ¼ À0.002 and 0.160, values generally similar to mtDNA population differentiation predicted from microsatellite R ST after adjusting for reduced effective population size and uniparental inheritance in organelle genomes. Based on mtDNA differentiation, breeding sex ratios or gene flow may have been slightly male biased in some years. The results reconcile conflicting past studies based on different types of genetic markers, supporting a single Chesapeake Bay management unit encompassing a panmictic striped bass breeding population. Heredity (2005) 94, 606-615.

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Section: Introductionmentioning

confidence: 99%

Reconciling nuclear microsatellite and mitochondrial marker estimates of population structure: breeding population structure of Chesapeake Bay striped bass (Morone saxatilis)

2005

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“…Population subdivision has been demonstrated in striped bass, Morone saxatilis (Morgan et al, 1973); bluegills, Lepomis macrochirus (Avise & Smith, 1974); darters, Etheostoma radiosum (Echelle etaL, 1975); red shiners, Cyprinella lutrensis (King etaL, 1985); salmonids (Utter etal., 1973); and mosquitofish, Gambusia sp. (Smith etal., 1983;Kennedy etal., 1985;McCleneghan et al, 1985;Zimmerman et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Population genetic responses of two minnow species (Cyprinidae) to seasonal stream intermittency

1990

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Two species of minnows, Cyprinella lutrensis (Notropis) and C. umbratilis (Cyprinidae) were sampled from Denton and Hickory Creeks, respectively, in northcentral Texas during periods of continuous flow and intermittency from 1983 to 1986. Allozyme variability was assessed for 14 structural loci in each species. Average heterozygosity (H) in C. lutrensis ranged from 0.10 to 0.16, and proportion of polymorphic loci (P) ranged from 0.44 to 0.78, while H and P in C. umbratilis ranged from 0.00 to 0.08 and 0.00 to 0.44, respectively. Heterozygote deficiencies were observed during flowing and intermittent conditions for both species, accounting for deviations from Hardy-Weinberg equilibrium. Temporal heterogeneity, measured by Fs-r, was higher in C. lutrensis (0.403) than in C. umbratilis (0.121). Allele frequencies fluctuated significantly in C. lutrensis but not in C. umbratilis. Genetic similarities between populations of C. lutrensis from flowing and intermittent conditions were highest between intermittent and subsequent flowing events. It is likely that intermittency resulted in a bottleneck and genetic drift, restructuring the genome of these fish as colonizers for subsequent flowing populations. These effects were less pronounced in C. umbratilis. Alternate effects ofintermittency on the genomes of the species reflect differences in genetic strategies of a generalist, C. lutrensis, and a relative specialist, C. umbratilis.

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“…Haemoglobin showed no variation between two collection sites (Lake Kohangatera and the Waikaia River), but plasma protein appeared to have two types of banding one of which was found in both localities. Plasma proteins may be useful for further studies below the species level (Morgan et al 1973).…”

Section: Resultsmentioning

confidence: 99%

Muscle myogens in the New Zealand Galaxiidae

Mitchell

Scott²

1979

New Zealand Journal of Marine and Freshwater Research

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The muscle myogen proteins of 10 species of the family Galaxiidae exhibited a high degree of species specificity when separated by starch gel electrophoresis. Non-diadromous, nonlacustrine species had some variation in the proteins present, while diadromous and lacustrine species, except for Galaxias maculatus, had remarkably uniform muscle myogen electropherograms. The variation can be explained by polymorphism and mosaic evolution of isolated freshwater populations. It was found that previously erected specific and generic categories, except for G. vulgaris, are clearly defined by differences in muscle protein. The standardised electropherogram types obtained were subjected to cluster analysis using both squared Euclidean distance and the complement of Jacard's coefficient with average sorting strategy. A principal component analysis was also carried out. The first two components of the principal component analysis widely spaced the three genera included in this study (Salmo, Galaxias, and Neochanna), with N. burrowsius occupying an intermediate position between Galaxias and Neochanna. Previous workers have considered this species to be a connecting link between the two genera. The dendrogram produced by using squared Euclidean distance (which included all available information) first clustered the types into Salmoniidae and Galaxiidae. The latter were split into the genus Neochanna and the genus Galaxias which was then subdivided into stout-bodied species (G. argenleus and G. jasciatus) and slenderbodied species. G. brevipinnis and G. vulgaris types were further separated from the three alpine Galaxias species and G. maculatus. The substantial agreement of these results with previous taxonomic efforts indicates that electrophoretic data can be a valid taxonomic tool.

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Electrophoretic Determination of Populations of the Striped Bass, Morone saxatilis, in the Upper Chesapeake Bay

Cited by 30 publications

References 0 publications

Reconciling nuclear microsatellite and mitochondrial marker estimates of population structure: breeding population structure of Chesapeake Bay striped bass (Morone saxatilis)

Reconciling nuclear microsatellite and mitochondrial marker estimates of population structure: breeding population structure of Chesapeake Bay striped bass (Morone saxatilis)

Population genetic responses of two minnow species (Cyprinidae) to seasonal stream intermittency

Muscle myogens in the New Zealand Galaxiidae

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