Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]
Por um escritor misterioso
Last updated 14 abril 2025
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://dfzljdn9uc3pi.cloudfront.net/2023/15973/1/fig-2-full.png)
Previous studies about the genetic diversity, connectivity and demographic history in Lutjanidae fishes have reported a common pattern of genetic homogeneity and expansion in populations from Western South Atlantic. In the present work, we inferred the population structure, the levels of genetic diversity and the demographic history of the Brazilian snapper Lutjanus alexandrei, a recently described and endemic species from Northeastern coast of Brazil. Five different fragments, including mitochondrial DNA (Control Region, Cyt b and ND4) and nuclear DNA (Myostatin and S7) regions were analyzed in 120 specimens of L. alexandrei from four localities in Northeastern Brazil, representing the first study of population genetics in this species. High levels of genetic diversity were observed following a panmictic pattern, probably related to the larval dispersal by the current tides along the Brazilian coast. In addition, both demographic history and neutrality tests indicated that L. alexandrei has undergone population expansion during Pleistocene. In this sense, the sea level variation from this period could have increased the available resources and suitable habitats for the Brazilian snapper.
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://www.frontiersin.org/files/Articles/480084/fmars-06-00545-HTML/image_m/fmars-06-00545-g001.jpg)
Frontiers Phylogeography and Historical Demography of Two Sympatric Atlantic Snappers: Lutjanus analis and L. jocu
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://d3i71xaburhd42.cloudfront.net/b110b920b63d32ff8fe5f9a1ce438b9ed7389df1/7-Figure1-1.png)
PDF] Multiloci analyses suggest synonymy among Rhomboplites, Ocyurus and Lutjanus and reveal the phylogenetic position of Lutjanus alexandrei ( Lutjanidae: Perciformes)
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://media.springernature.com/m685/springer-static/image/art%3A10.1007%2Fs10641-022-01310-z/MediaObjects/10641_2022_1310_Fig1_HTML.png)
Reproductive biology of the lane snapper, Lutjanus synagris (Linnaeus 1758) (Perciformes, Lutjanidae), in the Maranhão continental shelf, Northeast of Brazil
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://www.frontiersin.org/files/Articles/953895/fmars-09-953895-HTML/image_m/fmars-09-953895-g003.jpg)
Frontiers First evidence of population genetic structure of the deep-water blackmouth catshark Galeus melastomus Rafinesque, 1810
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://i1.rgstatic.net/publication/345016191_Variacao_e_divergencia_entre_Snappers_Lutjaninae_-_Perciformes_do_Atlantico_sul_ocidental_regiao_controle_mitocondrial_para_diagnose_de_pressao_pesqueira_ou_novo_Barcode_para_peixes/links/6321b98b873eca0c008894cb/largepreview.png)
PDF) Variação e divergência entre Snappers (Lutjaninae – Perciformes) do Atlântico sul ocidental: região controle mitocondrial para diagnose de pressão pesqueira ou novo Barcode para peixes?
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://www.researchgate.net/profile/Horacio-Schneider/publication/233838891/figure/fig3/AS:339852181688327@1458038482687/Haplotype-networks-based-on-A-the-mitochondrial-control-region-810-bps-of-Brazilian_Q320.jpg)
PDF) Population structure of Lutjanus purpureus (Lutjanidae - Perciformes) on the Brazilian coast: Further existence evidence of a single species of red snapper in the western Atlantic
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://i1.rgstatic.net/publication/233838891_Population_structure_of_Lutjanus_purpureus_Lutjanidae_-_Perciformes_on_the_Brazilian_coast_Further_existence_evidence_of_a_single_species_of_red_snapper_in_the_western_Atlantic/links/56e7e6cc08aeb6f93f54d376/largepreview.png)
PDF) Population structure of Lutjanus purpureus (Lutjanidae - Perciformes) on the Brazilian coast: Further existence evidence of a single species of red snapper in the western Atlantic
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://www.researchgate.net/profile/Felipe-Araujo-8/publication/354171693/figure/fig4/AS:1061465909911552@1630084602061/The-ultrametric-tree-inferred-in-BEAST-based-on-the-COI-gene-also-featuring-the-species_Q320.jpg)
PDF) Mitochondrial DNA suggests Hybridization in Freshwater Stingrays Potamotrygon (POTAMOTRYGONIDAE: MYLIOBATIFORMES) from the Xingu river, ia and reveals speciation in Paratrygon aiereba
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://media.springernature.com/m685/springer-static/image/art%3A10.1007%2Fs10641-022-01310-z/MediaObjects/10641_2022_1310_Fig2_HTML.png)
Reproductive biology of the lane snapper, Lutjanus synagris (Linnaeus 1758) (Perciformes, Lutjanidae), in the Maranhão continental shelf, Northeast of Brazil
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://c5.rgstatic.net/m/435982309481010/images/template/default/author/author_default_m.jpg)
PDF) Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://www.mdpi.com/fishes/fishes-07-00085/article_deploy/html/images/fishes-07-00085-g001.png)
Fishes, Free Full-Text
![Genetic connectivity and population expansion inferred from multilocus analysis in Lutjanus alexandrei (Lutjanidae–Perciformes), an endemic snapper from Northeastern Brazilian coast [PeerJ]](https://www.researchgate.net/publication/374268100/figure/fig2/AS:11431281194195521@1695990763347/Graphic-representation-of-maximum-values-of-intra-and-interspecific-distances_Q320.jpg)
Grazielle GOMES, Teacher, Dra, Federal University of Pará, Belém, UFPA, Department of Genetics
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