A multi-locus assessment of connectivity and historical demography in the bluehead wrasse (Thalassoma bifasciatum)

Haney, Robert A.; Silliman, Brian R.; Rand, David M.

doi:10.1038/sj.hdy.6800940

Cited by 22 publications

(12 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicate that the use of small sample sizes and single locus may or may not show genetic structuring. In our case, genetic (Haney et al 2007). In addition, Chrysoblephus laticeps showed haplotype diversity of 1 for all sites studied, but with overall haplotype diversity not equal to 1 (Teske et al 2010), and Naso vlamingii was observed to have haplotype diversity of 1 even with a large sample size (n ¼ 113) (Klanten et al 2007).…”

Section: Discussionmentioning

confidence: 70%

High gene flow in reef fishes and its implications for ad-hoc no-take marine reserves

Matias

Anticamara²,

Quilang

2013

Mitochondrial DNA

View full text Add to dashboard Cite

Integration of genetic connectivity information in effective marine reserve (MR) design is important in sustaining marine biodiversity. Here, genetic connectivity based on mitochondrial DNA (mtDNA) of three reef fish species, namely Epinephelus merra (n = 67; 32 from Bolinao, 14 from Alaminos, and 21 from Masinloc), Parupeneus multifasciatus (n = 23; 12 from Bolinao and 11 from Masinloc), and Odonus niger (n = 35; 21 from Mabini and 14 from Tingloy), sampled across western Luzon, Philippines, was inferred by assessing their genetic diversity, population genetic structure, and historical demography. The results show high haplotype and nucleotide diversity in the three species. Tests for population structure indicate high gene flow and no spatial genetic structuring for the three species. Mismatch analyses suggest unimodal distribution for E. merra and P. multifasciatus, but bimodal distribution for O. niger. Even with differences in mismatch distributions, all the three species exhibit low raggedness index indicating demographic population expansion. The bimodal distribution of O. niger could be attributed to the mixing of two isolated populations. High gene flow between sampling locations implies genetic exchanges and connectivity between many small MRs and fishing grounds in western Luzon, Philippines, at a scale similar to our study. This research is among the first few to elucidate the high genetic connectivity of reef fish communities across the Philippines (here western Luzon), but it also calls for more support (i.e. government and academia) for genetic research that aims to (1) understand the maintenance of megadiversity of the country and (2) search for effective biodiversity conservation options for the coral reefs.

show abstract

Section: Discussionmentioning

confidence: 70%

High gene flow in reef fishes and its implications for ad-hoc no-take marine reserves

Matias

Anticamara²,

Quilang

2013

Mitochondrial DNA

View full text Add to dashboard Cite

show abstract

“…The Caribbean Sea was once considered a single biogeographic province lacking phylogeographic barriers [56]–[60]. A number of well-known breaks have since been identified through genetic studies, including one between populations east and west of Mona Channel [39], [61], [62] and others isolating the Bahamas [39], [61], [63], [64].…”

Section: Discussionmentioning

confidence: 99%

Population Structure and Phylogeography in Nassau Grouper (Epinephelus striatus), a Mass-Aggregating Marine Fish

et al. 2014

View full text Add to dashboard Cite

To address patterns of genetic connectivity in a mass-aggregating marine fish, we analyzed genetic variation in mitochondrial DNA (mtDNA), microsatellites, and single nucleotide polymorphisms (SNPs) for Nassau grouper (Epinephelus striatus). We expected Nassau grouper to exhibit genetic differentiation among its subpopulations due to its reproductive behavior and retentive oceanographic conditions experienced across the Caribbean basin. All samples were genotyped for two mitochondrial markers and 9 microsatellite loci, and a subset of samples were genotyped for 4,234 SNPs. We found evidence of genetic differentiation in a Caribbean-wide study of this mass-aggregating marine fish using mtDNA (FST = 0.206, p<0.001), microsatellites (FST = 0.002, p = 0.004) and SNPs (FST = 0.002, p = 0.014), and identified three potential barriers to larval dispersal. Genetically isolated regions identified in our work mirror those seen for other invertebrate and fish species in the Caribbean basin. Oceanographic regimes in the Caribbean may largely explain patterns of genetic differentiation among Nassau grouper subpopulations. Regional patterns observed warrant standardization of fisheries management and conservation initiatives among countries within genetically isolated regions.

show abstract

“…This was also supported by a meta-analysis of 44 species of diverse marine organisms (Shanks 2009). Studies of other common Caribbean reef fishes with long PLDs have found no evidence of population genetic structure, even at large scales (Shulman & Bermingham 1995, Rocha et al 2002, Haney et al 2007. Although some species with significant PLDs show population genetic structure, the spatial scale between divergent populations is typically large (100s to 1000s of km: Bernardi et al 2001, Purcell et al 2006 Table 4.…”

Section: Discussionmentioning

confidence: 99%

Variability in connectivity indicated by chaotic genetic patchiness within and among populations of a marine fish

Hogan¹,

Thiessen²,

Heath³

2010

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Despite substantial advances in our understanding of marine population dynamics, there is still much uncertainty as to what processes influence connectivity, gene flow and population structure. To explore this, we examined the spatial and temporal variation in population genetic structure of adult and recently settled bicolor damselfish Stegastes partitus, a coral reef fish. We genotyped adult and juvenile fish from 10 sites over 4 sample years at 9 microsatellite loci. We show spatial heterogeneity in adult and juvenile population structure; however, we found no evidence of a pattern of spatial genetic divergence. Furthermore, genetic structure changed through time and between life stages in an unpredictable manner. Using these data, we test whether pre-or postsettlement selection, sweepstakes effects or variability in connectivity can explain the observed chaotic genetic patchiness. Our results indicate that the contributions of various larval sources likely change through time as a result of stochastic processes such as oceanographic flow. Our results have implications for the management of marine populations, as spatial and temporal variability in connectivity may act to promote long term stability of populations. Therefore it is important that marine management efforts account for such heterogeneity in the design of protected areas.KEY WORDS: Connectivity · Temporal variability · Larval dispersal · Chaotic genetic patchiness · Genetic structure · Coral reef fish Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 417: [263][264][265][266][267][268][269][270][271][272][273][274][275] 2010 through time and space (Larson & Julian 1999). This fine-scale genetic heterogeneity, termed chaotic genetic patchiness (Johnson & Black 1982), is characterized by low level genetic differentiation among and between adult and recruit populations (i.e. low F ST ) that is not consistent in space or time (Johnson & Black 1984).There are 4 main hypotheses put forth to explain chaotic genetic patchiness (Larson & Julian 1999); each infers a different mechanism by which this pattern can be explained. These hypotheses are (1) localized postsettlement selection resulting from microgeographic variation in environmental conditions, (2) variable local natural selection on pre-settlement individuals generating variability in cohorts through space and time, (3) 'sweepstakes chance-matching' (Hedgecock 1994) created by variable reproductive success of the adult source populations as a result of stochastic processes. This causes a genetic drift effect during the larval stage and a subsequent reduction in genetic variability in the recruit populations, and (4) spatial and temporal variability in the genetic composition of recruits caused by fluctuations in the source of larvae (Selkoe et al. 2006).Post-settlement natural selection has been invoked to explain spatial genetic heterogeneity in a marine snail (Johannesson et al. 1995). Generally, however, most studies have shown that gen...

show abstract

A multi-locus assessment of connectivity and historical demography in the bluehead wrasse (Thalassoma bifasciatum)

Cited by 22 publications

References 73 publications

High gene flow in reef fishes and its implications for ad-hoc no-take marine reserves

High gene flow in reef fishes and its implications for ad-hoc no-take marine reserves

Population Structure and Phylogeography in Nassau Grouper (Epinephelus striatus), a Mass-Aggregating Marine Fish

Variability in connectivity indicated by chaotic genetic patchiness within and among populations of a marine fish

Contact Info

Product

Resources

About