Genetic structure of Brazilian populations of white mouth croaker Micropogonias furnieri (Perciformes : Sciaenidae)

Puchnick‐Legat, Angela; Levy, J.A.

doi:10.1590/s1516-89132006000400011

Cited by 14 publications

(13 citation statements)

References 20 publications

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“…This pattern of differentiation contrasts with the results for allozymes, which did not distinguish among M. furnieri stocks located from Cabo Frio, Brazil (22 • 53 S; 42 • 00 W) to Bahía Blanca (Maggioni et al, 1994;Levy et al, 1998). Studies conducted with restricted fragment length polymorphism (RFLP) analysis of mtDNA also did not detect differences between M. furnieri from Río de Janeiro (23 • S) to Chuy (34 • S) (Puchnick-Legat & Levy, 2006). The discrepancies with these studies are probably because of the use of genetic markers with lower mutation rates than those for mtDNA CR sequences.…”

Section: Discussionmentioning

confidence: 70%

Genetic evidence of two stocks of the whitemouth croaker Micropogonias furnieri in the Río de la Plata and oceanic front in Uruguay

Pereira¹,

Márquez²,

Marı́n

et al. 2009

Journal of Fish Biology

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Analysis of the mitochondrial DNA control region resolved two stocks of whitemouth croaker Micropogonias furnieri in Uruguayan waters, one in the Río de la Plata and the other on the Uruguayan shelf. The whitemouth croaker is the most important coastal fishery resource along the coast and has the greatest commercial importance in the Río de la Plata and its oceanic front. The number of pair-wise differences (pi) and haplotype diversity (h) showed significant differences between the two regions. Frequencies of mtDNA haplotypes did not differ between Río de la Plata from Bahia Blanca M. furnieri. Samples from the oceanic front showed greater genetic variability and a larger effective number of females that were an order of magnitude larger than that in Río de la Plata. Mismatch distributions showed evidence of a recent population expansion in the oceanic region, beginning c. 40,000 b.p. The presence of two stocks of the M. furnieri in the study area should be considered in the management of this species' fishery.

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Section: Discussionmentioning

confidence: 70%

Genetic evidence of two stocks of the whitemouth croaker Micropogonias furnieri in the Río de la Plata and oceanic front in Uruguay

Pereira¹,

Márquez²,

Marı́n

et al. 2009

Journal of Fish Biology

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“…individuals sampled in Montevideo) and the Atlantic Ocean (F ST =0.104), which agree with the results obtained herein. On a larger geographical scale, Puchnik-Legat and Levy (2006) employed RFLPs along the Brazilian coast and obtained estimates of F ST ranging from less than 0.0001 to 0.446. More generally, our results are among the highest estimates of F ST among Sciaenidae.…”

Section: Discussionmentioning

confidence: 99%

“…More recently, Pereira et al (2009) using mitochondrial DNA (mtDNA) as a molecular marker, found moderate levels of gene flow between individuals from Río de La Plata and its oceanic front. Like in Uruguayan waters, a study using RFLPs of mtDNA (Puchnik-Legat and Levy 2006) found restricted gene flow among several populations along the Brazilian coast (see discussion). Likewise, different stocks had been proposed for Brazilian waters by means of morphological analyses (e.g.…”

Section: Introductionmentioning

confidence: 93%

Genetic structure of the white croaker, Micropogonias furnieri Desmarest 1823 (Perciformes: Sciaenidae) along Uruguayan coasts: contrasting marine, estuarine, and lacustrine populations

2011

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Micropogonias furnieri is widely distributed in the southwestern Atlantic Ocean. In Uruguay, Laguna de Rocha and Río de La Plata estuary have been reported as reproductive and nursery areas. In Laguna de Rocha, individuals reach maturity at smaller total length than their oceanic counterparts. It has been difficult to establish whether Laguna de Rocha represents a biologically distinct population or simply ecophenotypic variation. More generally, the possible presence of several distinct populations of white croakers in Uruguayan waters has been hypothesized, but limited data exist to substantiate them. A recent mitochondrial DNA analysis suggested divergence between the Río de La Plata and the Oceanic front populations. Using seven microsatellites loci, we studied the population structure of M. furnieri in the nursery areas suggested by the literature, as well as in three additional localities to test these hypotheses. The individuals of Laguna de Rocha showed a moderate genetic differentiation with respect to some of the other populations surveyed. Specimens of Montevideo showed the higher genetic distinctiveness. Given the apparent absence of geographical barriers, other factors may be responsible for the observed differentiation. The complex pattern of forces interacting in this system makes it difficult to disentangle the causes of the population structure found. The adaptation to local environmental conditions could be playing an important role in population differentiation, as well as the possible selective pressures imposed by fisheries. The results obtained in this work offer clues about the processes responsible for differentiation of fishes in estuarine and marine environments.

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“…Levy et al (1998) compared 17 enzymes and one protein encoding loci by starch and polyacrylamide gel electrophoresis in samples from the same specimens utilized in this study and found high degree of genetic homogeneity in the allele frequencies and a high level of gene flow along the study area. Puchnik-Legat & Levy (2006) analysed mitochondrial DNA of specimens from northern to southern Brazil and found significant differences between these regions but not between SB and SEB. New and more precise genetic studies with microsatellites and intron size polymer-phism identified distinct groups with populational status south of Torres (29ºS) and northward up to Rio de Janeiro (Vasconcellos et al, 2015).…”

Section: Stock Identificationmentioning

confidence: 99%

Stocks and management units of Micropogonias furnieri (Desmarest, 1823) in southwestern Atlantic

Haimovici¹,

Cardoso²,

Unpierre³

2016

lajar

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ABSTRACT. The whitemouth croaker Micropogonias furnieri is a demersal coastal and estuarine sciaenid fish intensely exploited by small and large scale fisheries in Brazil, Uruguay and Argentina between 22° and 40°S. To study the stocks structure of the whitemouth croaker along southeastern (SEB) and southern Brazil (SB) between 22°28' and 33°53'S, morphometric, meristic and growth data were collected during a bottom trawl survey. Consistent differences between different latitudes were not observed neither for the univariate comparisons of the number of gill rakers and dorsal and pectoral fin rays nor for five morphometric measurements. A principal component analysis of the five morphometric measures did not show a geographical grouping pattern. However, the age structure and growth differed significantly between south and north of Cape Santa Marta Grande (29•S). Former references and this study support the existence of two independent stocks of whitemouth croaker in southeastern and southern Brazil and diverse published studies indicate some degree of mixture between fishes spawning along southern Brazil, Uruguay and Argentina. In terms of access of the fleets there are three jurisdictions: along SB and SEB, where only Brazilian boats fish, in the common fishery zone of Uruguay and Argentina where both countries fish and south of 39ºS, where only Argentinian boats can fish but where the whitemouth croaker is not an important target. Efficient management requires the identification of management units based in stocks structure, life history, distribution of the fisheries and jurisdictions. When all these factors are taken into account, excluding local coastal small scale fisheries management, three geographical management units were identified in the shared waters of Argentinian and Uruguayan waters, southern Brazil and southeastern Brazil. Keywords: whitemouth croaker, stock identification, populations, geographic variation, morphometry, growth, Brazil.Stocks y unidades de manejo de la corvina Micropogonias furnieri (Desmarest, 1823) en el Atlántico sudoccidental RESUMEN. La corvina Micropogonias furnieri es un pez demersal costero y estuarino de la familia Sciaenidae abundante e intensamente explotado por flotas costeras e industriales entre el sureste de Brasil (22°S) y el norte de Argentina (40°S). Para el estudio de la estructura de los stocks de la corvina blanca a lo largo del sureste y sur de Brasil, se obtuvieron datos morfométricos, merísticos y de crecimiento a lo largo de la costa sur (SB) y sudeste (SEB) de Brasil entre las latitudes 22º28'S y 33º53'S. No se encontraron diferencias significativas entre las diferentes latitudes de pesca en el número de radios branquiales, rayos de las aletas dorsal y pectoral, ni para las cinco medidas morfométricas. El análisis de componentes principales de las cinco mediciones morfométricas no mostró un patrón de agrupación geográfica. Sin embargo, la estructura de edad y crecimiento difirió significativamente entre el sur y norte del Cabo Santa Marta Grande (29°S)....

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Genetic structure of Brazilian populations of white mouth croaker Micropogonias furnieri (Perciformes : Sciaenidae)

Cited by 14 publications

References 20 publications

Genetic evidence of two stocks of the whitemouth croaker Micropogonias furnieri in the Río de la Plata and oceanic front in Uruguay

Genetic evidence of two stocks of the whitemouth croaker Micropogonias furnieri in the Río de la Plata and oceanic front in Uruguay

Genetic structure of the white croaker, Micropogonias furnieri Desmarest 1823 (Perciformes: Sciaenidae) along Uruguayan coasts: contrasting marine, estuarine, and lacustrine populations

Stocks and management units of Micropogonias furnieri (Desmarest, 1823) in southwestern Atlantic

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