Molecular phylogeography of western Mediterranean dusky grouper Epinephelus marginatus

Gilles, André; Miquelis, Anne; Quignard, Jean-Pierre; Faure, Éric

doi:10.1016/s0764-4469(00)00114-1

Cited by 22 publications

(25 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taking the genetic divergence results for the cytochrome b gene as an example, specimens from Venezuela (VE1), Amapá (AP16), Pará (PA3) and Maranhão (MA2) had sequences which were 100% similar (Table 4) and the results for the 16S rRNA gene were similar (Table 5), suggesting that there are no barriers preventing continuous genetic flow between the populations within each group. The low nucleotide divergence values for the two genes are often observed in closely related taxa, our results with the cytochrome b gene being similar to population studies on fish such as Dicentrarchus labrax (Allergruci et al, 1999) and Epinephelus marginatus (Gilles et al, 2000).…”

Section: Genetic Differences In the Macrodon Populationssupporting

confidence: 89%

“…There was no perfect geographic structuring of the sampled populations in the clades, as is shown by specimens from one locality grouping with specimens from another, geographically distant, locality. Gilles et al (2000) used cytochrome b gene sequences to study Epinephelus marginatus (Serranidae) populations and observed that in spite of high nucleotide similarity between French and Tunisian populations there was a certain geographic structuring of the specimens and that cladograms showed separate French and Tunisian populations. Allergruci et al (1999), studying Dicentrarchus labrax, also observed that in spite of the high level of nucleotide similarity in the cytochrome b gene sequences there was a certain geographic structuring within Mediterranean D. labrax populations, with populations from the northwest (French waters) and east (Greek and Egyptian waters) being clearly distinct from Tyrrenian populations.…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…Futuyma (1997) postulated that low levels of genetic flow and population isolation are important for speciation to take place. Several studies have assessed the degree of genetic differentiation of fish populations based on mitochondrial DNA sequences, especially cytochrome b and D-loop region sequences (Dawson et al, 2001;Gilles et al, 2000;Allergruci et al, 1999).…”

Section: Isolation Of the Macrodon Populationsmentioning

confidence: 99%

See 2 more Smart Citations

Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis

2003

View full text Add to dashboard Cite

The king weakfish (pescada-gó in Portuguese -Macrodon ancylodon (Sciaenidae), a demersal (bottom-feeding) species found in South America Atlantic coastal waters from the Gulf of Paria in Venezuela to Baia Blanca in Argentina, is an economically important species because of its abundance and wide acceptance by consumers. Because of its wide distribution this fish may be subject to geographic isolation and this may have resulted in distinct populations along its coastal range. Considering that this species represents an important economic resource, confirmation of whether M. ancylodon is a single species or there are different genetic stocks spread over its wide distribution would be an important contribution to conservation policies and population management of the king weakfish. To investigate differences between king weakfish populations we used the cytochrome b and 16S rRNA genes to characterize M. ancylodon specimens caught throughout its South American range from Venezuela to Argentina. Our results clearly distinguished two genetically different groups which show nucleotide divergence and genetic structuring patterns that strongly suggest they may be different species, disagreeing with the widely accepted traditional taxonomy that accepts only one species of Macrodon in the western Atlantic.

show abstract

Section: Genetic Differences In the Macrodon Populationssupporting

confidence: 89%

Section: Phylogenetic Analysesmentioning

confidence: 99%

Section: Isolation Of the Macrodon Populationsmentioning

confidence: 99%

See 1 more Smart Citation

Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis

2003

View full text Add to dashboard Cite

show abstract

“…The deep splits observed in rock hind, greater soapfish, parrotfish, and blenny are of an equivalent magnitude to the divergences observed in cytochrome b between Newfoundland and Norwegian samples of the capelin Mallotus vilosus (d=5.7%; Birt et al 1995). These values approach divergences between sister species of other marine fishes (Johns and Avise 1998), but are less than that described between cryptic sympatric species in another grouper, E. marginatus (d=0.158; Gilles et al 2000).…”

Section: Discussionmentioning

confidence: 68%

Ancient divergences and recent connections in two tropical Atlantic reef fishes Epinephelus adscensionis and Rypticus saponaceous (Percoidei: Serranidae)

2003

View full text Add to dashboard Cite

Reef habitats of the tropical Atlantic are separated by river outflows and oceanic expanses that may preclude larval dispersal or other population connections in shorefishes. To examine the impact of these habitat discontinuities on the intraspecific phylogeography of reef-associated species we conducted range-wide surveys of two amphi-Atlantic reef fishes that have dispersive pelagic larval stages. Based on 593 bp of mtDNA cytochrome b from the rock hind Epinephelus adscensionis and 682 bp from the greater soapfish Rypticus saponaceous (n=109 and 86, respectively), we found evidence of relatively ancient separations as well as recent surmounting of biogeographic barriers by dispersal or colonization. Rock hind showed slight but significant population genetic differentiation across much of the tropical Atlantic Ocean (F ST =0.056), but deep divergence between the southeastern United States and seven other localities from the Bahamas to the south, central and east Atlantic (mean pairwise d=0.040, overall F ST =0.867). The geographic distribution of the two rock hind lineages is highly unusual in genetic studies of Caribbean Sea reef fishes, because those lineages are separated by less than 250 km of open water within a major biogeographic region. In contrast, highly significant population genetic structure was observed among greater soapfish from the SW Caribbean, Brazil, and mid-Atlantic ridge (F ST =0.372), with a deep evolutionary separation distinguishing putative R. saponaceous from West Africa (mean pairwise d=0.044, overall F ST =0.929). Both species show evidence for a potential connection between the Caribbean and Brazilian provinces. While widespread haplotype sharing in rock hind indicates that larvae of this species cross oceanic expanses of as much as 2000 km, such a situation is difficult to reconcile with the isolation of populations in Florida and the Bahamas separated by only 250 km. These findings indicate that populations of some species in disjunct biogeographic zones may be isolated for long periods, perhaps sufficient for allopatric speciation, but rare gene flow between zones may preclude such evolutionary divergence in other species.

show abstract

“…To date, there exist two studies describing the genetic population structure of E. marginatus. De Innocentiis et al (2001) have compared two molecular markers, allozymes and microsatellites, revealing that Mediterranean dusky grouper populations are non panmittic, additionally Gilles et al (2000), analysing cytochrome b sequences, have suggested the presence of a cryptic species along the Algerian coasts.…”

Section: Introductionmentioning

confidence: 99%

Genetic population structure ofEpinephelus marginatus(Pisces, Serranidae) revealed by two molecular markers

Maggio

Andaloro

Arculeo

2006

Italian Journal of Zoology

View full text Add to dashboard Cite

In this paper, data are presented regarding the population structure of dusky grouper (Epinephelus marginatus) which was sampled in the Mediterranean Sea and Atlantic Ocean using two different molecular markers, ND2 RFLP and cytochrome b (cyt b) sequence analysis. The main objective of the study is to analyse the genetic variability of E. marginatus in the Mediterranean Sea to define how the biological characteristics of the species, such as the dispersal capability of pelagic larvae and the benthonic-sedentary life style, can affect the genetic population structure or maintaining the gene flow or determining genetic differences. Furthermore, we considered an Atlantic sample to establish the presence of genetic differences between the two biogeographical areas under consideration. Analysis of variation based on ND2 RFLP analysis revealed a genetic difference between the Atlantic and Mediterranean samples, whilst cyt b sequence analysis did not. There exists evidence for genetic differentiation for both molecular markers in the Mediterranean region. The majority of the variation was due to the Ustica Island sample and this could be due to differences in fisheries effort since the island is a protected area where recreational and professional fisheries are almost completely forbidden. The pattern of genetic diversity, haplotype networks and mismatch distribution suggest a historical influence on the genetic structure of E. marginatus and recent population expansion. An analysis of the genetic structure of the dusky grouper will be the prerequisite for decisions regarding conservation and fisheries management.

show abstract

Molecular phylogeography of western Mediterranean dusky grouper Epinephelus marginatus

Cited by 22 publications

References 11 publications

Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis

Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis

Ancient divergences and recent connections in two tropical Atlantic reef fishes Epinephelus adscensionis and Rypticus saponaceous (Percoidei: Serranidae)

Genetic population structure ofEpinephelus marginatus(Pisces, Serranidae) revealed by two molecular markers

Contact Info

Product

Resources

About