Population Structure of Eastern Oysters (<i>Crassostrea virginica</i>) Inhabiting the Laguna Madre, Texas, and Adjacent Bay Systems

King, Tim L.; Ward, Rocky; Zimmerman, Earl G.

doi:10.1139/f94-307

Cited by 29 publications

(59 citation statements)

References 5 publications

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“…Studying the population structure of oysters in Lagoons of Texas, King et al (1994) found significant differentiation with a mean F,, estimate of 0.164. The lagoons of Texas are up to 10 times older than those involved in the present study.…”

Section: Genetic Structure Of the Populationsmentioning

confidence: 99%

“…In the Mediterranean only 2 bivalves (Ruditapes aureus and R, decussatus) from 1 lagoon (Etang d e Thau) have been analysed (Borsa & Thiriot-Quievreux 1990, Borsa et al 1991. Studying the genetic structure of oyster population of lagoons of southern Texas, USA, King et al (1994) found differentiation between lagoons, a result of importance for fishery and conservation.…”

Section: Introductionmentioning

confidence: 99%

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No evidence for genetic differentiation of the mussel Mytilus galloprovincialis between lagoons and the seaside

Skalamera¹,

Renaud²,

Raymond³

et al. 1999

Mar. Ecol. Prog. Ser.

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Twelve locations of Mytilus galloprov~ncialis were sampled in lagoons and along the seaside in southern France. Lagoons represent a habitat with widely varying ecoloqcal conhtions. Each lagoon has its own characteristic range of sahities and temperatures which fluctuate throughout the year. We studied several fundamental parameters of the population genetics of M. galloprov~cialis at 8 enzymatic loci (genetic differentiation between locations, heterozygote deficits, selection, linkage disequilibrium) and investigated whether they are influenced by the high spatial and temporal instability of the lagoons (brackish water). In contrast to what could be expected based on the corresponding literature, we found no evidence for genetic differentiation, either among lagoons or between lagoons and the seaside. There was, thus, no evidence of selection on any of the loci studied.

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Section: Genetic Structure Of the Populationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

No evidence for genetic differentiation of the mussel Mytilus galloprovincialis between lagoons and the seaside

Skalamera¹,

Renaud²,

Raymond³

et al. 1999

Mar. Ecol. Prog. Ser.

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show abstract

“…For example, in several marine species, estuaries and embayments, disconnected from ocean currents, retain local recruits, as evidenced by genetically distinct populations (e.g., King et al 1994;Beheregaray and Sunnucks 2001;Watts and Johnson 2004). Islands, especially archipelagos, which can disrupt and complicate the flow of currents (Scheltema 1986), are another potentially important source of barriers to connectivity, a possibility that was recognized by Darwin (1859, p. 401) in the Galapagos Islands.…”

mentioning

confidence: 99%

Islands Increase Genetic Subdivision and Disrupt Patterns of Connectivity of Intertidal Snails in a Complex Archipelago

JOHNSON

2006

Evolution

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The view that marine species with planktonic dispersal have highly connected, demographically open populations is giving way to recognition that populations may often be largely self‐recruiting, or demographically closed. This raises the question of what local conditions might favor isolation of populations. To test the importance of islands for local isolation in species with planktonic larvae, we examined allozyme variation among 35 populations of the intertidal snail Austrocochlea constricta in the Houtman Abrolhos Islands, Western Australia, spanning 60 km. Heterogeneity of allozyme frequencies among populations was high, with average FST of 0.237, indicating highly localized populations. Increased subdivision was associated with islands at different scales: between island groups, separated by deep water gaps, and between disconnected sets of islands within groups. At short distances, up to two km, subdivision increased fivefold between islands compared with that between populations on the same island. Along 11 km of continuous, sheltered shore, there was isolation by distance but among a linear series of islands over similar distance, there was greater subdivision at short distances but no association with distance. These patterns had been seen previously in the direct‐developing snail Bembicium vittatum, but its finding in A. constricta confirms for a planktonic disperser the importance of this complex archipelago for both retention of locally produced larvae and disruption of patterns of connectivity. Taken together, these results indicate that islands can increase both the “open” and the “closed” components of recruitment and that applicable models of genetic connectivity depend substantially on local conditions.

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“…Genetic differentiation can be attributed to genetic drift and/or natural selection in populations isolated by hydrogeographic barriers (Hoover & Gaffney 2005), such as temperature, salinity and oceanic currents (Reeb & Avise 1990). King et al (1994) observed a distinct genetic composition in the Population genetics of mangrove oysters 7…”

Section: Discussionmentioning

confidence: 95%

Assessing the genetic diversity of the mangrove oysterCrassostrea rhizophorae(Bivalvia, Ostreidae) by microsatellite markers in southeastern Brazil

Galvao

Hilsdorf

2015

Marine Biology Research

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Oysters of the genus Crassostrea are an economically important resource occurring along the Brazilian coast, mainly in estuarine regions. Inter-and intra-population genetic diversity is essential for monitoring long-term genetic changes and for sustainable use of this bivalve by coastal fishing communities. Microsatellite markers were used to evaluate the genetic diversity of natural populations of the mangrove oyster Crassostrea rhizophorae in southeastern Brazil. Samples of 150 oysters from four areas were analyzed. Microsatellite loci were obtained from an enriched microsatellite library. The genetic structure was evaluated using an index of genetic differentiation described previously. The effective population size and rate of gene flow were estimated through a maximum likelihood coalescent approach using Migrate. The mean number of alleles ranged from 10 to 21 and the expected heterozygosity from 0.89 to 0.91. Evidence of a possible bottleneck effect under three mutational models was found. The D est index indicated low to moderate differentiation among sample locales. Coalescent analysis showed variation in effective population size and asymmetry in the gene flow among samples. Levels of genetic variability and differentiation found among C. rhizophorae populated banks have important implications for the sustainable harvest, cultivation and conservation of this marine resource in the studied area.

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Population Structure of Eastern Oysters (Crassostrea virginica) Inhabiting the Laguna Madre, Texas, and Adjacent Bay Systems

Cited by 29 publications

References 5 publications

No evidence for genetic differentiation of the mussel Mytilus galloprovincialis between lagoons and the seaside

No evidence for genetic differentiation of the mussel Mytilus galloprovincialis between lagoons and the seaside

Islands Increase Genetic Subdivision and Disrupt Patterns of Connectivity of Intertidal Snails in a Complex Archipelago

Assessing the genetic diversity of the mangrove oysterCrassostrea rhizophorae(Bivalvia, Ostreidae) by microsatellite markers in southeastern Brazil

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