Genetic differentiation among populations of the blackfin goodea Goodea atripinnis (Cyprinodontiformes: Goodeidae): implications for its evolutionary history

Abstract

Central Mexico is characterized by a complex topography that is the result of historic and contemporary tectonic and climatic factors. These events have influenced the evolutionary history of numerous freshwater fishes in the region. Nonetheless, recent studies have shown that life-history traits and ecological characteristics of species may influence dispersal capabilities and the degree of genetic connectivity.Goodea (Cyprinodontiformes: Goodeidae) is one of the most widely distributed and environmentally tolerant genera of goodeids. In this study, the authors analysed variation in the mitochondrial cytochrome b gene to evaluate the phylogeographic relationships, genetic structure, genetic diversity and demographic history of Goodea from across its distribution range. They found low genetic differentiation and identified shared haplotypes among several regions. Geographic segregation was found in samples southwest and northeast of the Lower Lerma region, with some internal isolated groups showing phylogeographic differentiation and unique haplotypes. The AMOVA best explained genetic structure when grouped by haplogroups rather than when grouped by recognized biogeographic regions. Several regions showed null genetic diversity, raising the possibility of dispersal mediated by humans. Finally, Bayesian Skyline Plot analysis showed a population expansion for the Southwest haplogroup, except for the Armería population and sub-group II of the Northeast haplogroup. All this suggests a recent colonization of Goodea atripinnis throughout some of the biogeographic regions currently inhabited by this species.

Speciation on a complex landscape; phylogeny and demography of Mexican Goodeid fish

“…Some previous analyses of genetic differentiation between populations of dimorphic and monomorphic Goodeinae species found gene flow to be occurring, but less readily between populations of monomorphic species (Ritchie et al ., 2007). Recent genetic analysis of populations within Goodea and Ilyodon suggest connectivity and gene flow between species and populations is highly variable and mediated by complex topographical changes (Beltrán-López et al ., 2017, 2021). Whilst we detect moderate levels of ancient gene flow, it is not possible here to tell whether gene flow is adaptive and has contributed to phenotypic diversity and diversification, as observed in other systems (Malinsky et al ., 2015; Meier et al ., 2017; Svardal et al ., 2020), but some of these introgressed genes were maintained.…”

Evolutionary history of the Aztec shiner Aztecula sallaei (Günther, 1868) (Teleostei: Cyprinidae): An endemic and monotypic species of Mexico

“…The relationships and ichthyofauna interchange/isolation between the headwaters of Panuco and Lerma rivers have been widely found in other fish species, with events occurring in different spatiotemporal scales (Domínguez‐Domínguez et al, 2010). Recent events have been documented in the goodeids Xenotoca variata , Goodea atripinnis , and Girardinichthys multirradiatus (Beltrán‐López et al, 2020; Doadrio & Domı́nguez, 2004; Domínguez‐Domínguez et al, 2006, 2010) the poeciliid Poeciliopsis infans (Mateos et al, 2002), the cyprinids Yuriria alta (Domínguez‐Domínguez et al, 2006) and Algansea tincella (Pérez‐Rodríguez et al, 2009), and the silverside Chirostoma jordani (Betancourt‐Resendes et al, unpublished data). This supports the idea of a complex geological and phylogeographic history of shared species that inhabit the Upper Lerma and Panuco basins.…”

Cyanotoxins bioaccumulation by fish in an anthropized reservoir in central Mexico

“…In this regard, tropical freshwater reservoirs are environments with multiple human uses (e.g., aquaculture of non-native species, artisanal fisheries, water supply, irrigation) that allow the evaluation of ecological and human health risks posed by cyanotoxins. Accordingly, in this research we focused on three fish species from an anthropized reservoir in Central Mexico: Goodea atripinnis, which is endemic (Beltrán-López et al 2021); Poeciliopsis gracilis, which was originally distributed in southern Mexico in rivers north and west of the Isthmus of Tehuantepec (in both Pacific and Atlantic versants) (Ward et al 2022), and has been introduced into several basins in Central Mexico, including Pánuco, Balsas (Miller 2009), and upper Lerma (this study), usually accidentally by aquaculture activities of other species (Contreras-MacBeath et al 2014); finally, Oreochromis niloticus (Nile tilapia), which has been introduced worldwide for aquaculture and local fishing, sometimes resulting in its establishment outside its original culture areas. The introduction of Nile tilapia has been considered a threat to the native aquatic fauna (Forneck et al 2021, Gracida-Juárez et al 2022.…”