Journal article
Genetic differentiation through dispersal and isolation in two freshwater fish species from coastal basins of Northeastern Brazil
Neotropical ichthyology, Vol.18(3), pp.1-19
01/01/2020
DOI: 10.1590/1982-0224-2019-0114
Abstract
The coastal basins in Northeastern Brazil used in this study make up two different ecoregions for freshwater fishes (Amazonas estuary and coastal drainages, and Parnaiba) and two areas of endemism for Characiformes (Maranhao and Parnaiba), and exhibits a diversified yet poorly explored freshwater fish fauna. The population structure and biogeography of two migratory freshwater fish species that are commercially exploited from Maranhao and Parnaiba regions were herein analyzed. Molecular sequence data and statistical analyses were used to estimate haplotypes networks and lineage divergence times and correlated with hydrographic history of drainage and paleodrainages of the region. A total of 171 sequences was produced for both species, Schizodon dissimilis (col, n = 70) and Prochilodus lacustris (D-loop, n = 101). All analyses identified the presence of three genetically delimited groups of S. dissimilis and six groups of P. lacustris. The lineage time analyses indicate diversification among these species within the past 1 million year. The results indicate the influence of geodispersal in the formation of the ichthyofauna in the studied area through headwater stream capture events and reticulated connections between the mouths of rivers along the coastal plain due to eustatic sea level fluctuations.
Details
- Title: Subtitle
- Genetic differentiation through dispersal and isolation in two freshwater fish species from coastal basins of Northeastern Brazil
- Creators
- Joao Marcelo S. Abreu - Universidade Federal do MaranhãoBrandon T. Waltz - University of Louisiana at LafayetteJames S. Albert - University of Louisiana at LafayetteNivaldo M. Piorski - Universidade Federal do Maranhão
- Resource Type
- Journal article
- Publication Details
- Neotropical ichthyology, Vol.18(3), pp.1-19
- DOI
- 10.1590/1982-0224-2019-0114
- ISSN
- 1679-6225
- eISSN
- 1982-0224
- Publisher
- Soc Brasileira Ictiologia
- Number of pages
- 19
- Grant note
- DEB 0614334; 0741450; 1354511 / US National Science Foundation; National Science Foundation (NSF) 011644/2016; 01490/16 / FAPEMA; Fundacao de Amparo a Pesquisa e Desenvolvimento Cientifico do Maranhao (FAPEMA)
- Language
- English
- Date published
- 01/01/2020
- Academic Unit
- Biology
- Record Identifier
- 9984936508302771
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