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Titolo:
Allozyme and microsatellite loci provide discordant estimates of population differentiation in the endangered dusky grouper (Epinephelus marginatus) within the Mediterranean Sea
Autore:
De Innocentiis, S; Sola, L; Cataudella, S; Bentzen, P;
Indirizzi:
Univ Roma La Sapienza, Dept Anim & Human Biol, I-00161 Rome, Italy Univ Roma La Sapienza Rome Italy I-00161 Human Biol, I-00161 Rome, Italy Cent Inst Marine Res, ICRAM, I-00166 Rome, Italy Cent Inst Marine Res Rome Italy I-00166 Res, ICRAM, I-00166 Rome, Italy Univ Roma Tor Vergata, LESA, Expt Ecol & Aquaculture Lab, I-00133 Rome, Italy Univ Roma Tor Vergata Rome Italy I-00133 ulture Lab, I-00133 Rome, Italy Univ Washington, Marine Mol Biotechnol Lab, Seattle, WA 98105 USA Univ Washington Seattle WA USA 98105 iotechnol Lab, Seattle, WA 98105 USA
Titolo Testata:
MOLECULAR ECOLOGY
fascicolo: 9, volume: 10, anno: 2001,
pagine: 2163 - 2175
SICI:
0962-1083(200109)10:9<2163:AAMLPD>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
BASS DICENTRARCHUS-LABRAX; GENETIC DIFFERENTIATION; ALLELE FREQUENCIES; ANADROMOUS FISHES; MULTIPLE ALLELES; HARDY-WEINBERG; FRESH-WATER; POLYMORPHISM; ATLANTIC; DISTANCE;
Keywords:
allozymes; conservation genetics; Epinephelus marginatus; fish; microsatellites; molecular markers;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
74
Recensione:
Indirizzi per estratti:
Indirizzo: Bentzen, P Dalhousie Univ, Dept Biol, Halifax, NS B3H 4J1, Canada Dalhousie Univ Halifax NS Canada B3H 4J1 x, NS B3H 4J1, Canada
Citazione:
S. De Innocentiis et al., "Allozyme and microsatellite loci provide discordant estimates of population differentiation in the endangered dusky grouper (Epinephelus marginatus) within the Mediterranean Sea", MOL ECOL, 10(9), 2001, pp. 2163-2175

Abstract

The dusky grouper, Epinephelus marginatus, inhabits coastal reefs in the Mediterranean Sea and Atlantic Ocean. A decline in the abundance of this long-lived protogynous hermaphrodite has led to its listing as an endangered species in the Mediterranean, and heightened management concerns regarding its genetic variability and population substructure. To address these concerns, we analysed genetic variation at seven microsatellite and 28 allozyme loci in dusky groupers sampled from seven areas (for microsatellites) and three areas (for allozymes) in the west-central Mediterranean. Levels of genetic variability were higher for microsatellites than for allozymes (mean H-E = 0.78 and 0.07, respectively), but similar to those observed in other marine fishes with comparable markers. Both microsatellites and allozymes revealed significant genetic differentiation among all areas analysed with each class of marker, but the magnitude of differentiation revealed by allozymes over three locales (F-ST = 0.214) was greater than that detected with microsatellites over seven areas, or over the three areas shared with the allozyme analysis (F-ST = 0.018 and -0, respectively). A large proportion of the allozyme differentiation was due to a single locus (ADA*) possibly influenced by selection, but allozyme differentiation over the three areas was still highly significant (F-ST = 0.06, P < 0.0001), and the 95% confidence intervals for allozyme and microsatellite FST did not overlap when this locus was excluded. There was no evidence of isolation by distance with either class of markers. Our results lead us to conclude that dusky groupers are not panmictic in the Mediterranean Sea and suggest that they should be managed on a local basis. However, more work is needed to elucidate genetic relationships among populations.

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Documento generato il 05/04/20 alle ore 03:40:52