Phylogeography and population structure of the Rock Darter species complex, Etheostoma rupestre (Teleostomi: Percidae) across the Mobile River Basin

Janosik, Alexis M.; Whitaker, Justin; Johnston, Colin

doi:10.1007/s10750-022-05122-1

Cited by 2 publications

(8 citation statements)

References 42 publications

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“…Near et al (2011) found genetic evidence of two undescribed taxa (three total lineages) in E. rupestre (an eastern clade and a central clade). Janosik et al (2023) also found evidence of three lineages in Etheostoma rupestre. Two lineages (an Alabama River clade and Coosa/Tallapoosa River clade) exhibited monophyly with the Cytochrome-b gene (Fig.…”

Section: Introductionmentioning

confidence: 80%

“…Populations of E. r. uphapeense possess 7-9 distinct lateral blotches (mean 7.7) as opposed to 5-9 (mean 7.0) in E. r. piersoni (Table 9). Etheostoma r. uphapeense and E. r. piersoni are genetically distinct and monophyletic on cytochrome b (Janosik et al, 2023).…”

Section: Number Of Blotchesmentioning

confidence: 96%

“…Populations of E. r. piersoni can be distinguished from populations of E. r. uphapeense by possessing a lower range and mean of blotches that tend to be slightly more diffuse (5-9 distinct blotches in E. r. piersoni vs. 7-9 in E. r. uphapeense) (Table 9). E. r. piersoni and E. r. uphapeense can be further distinguished with genetics (see Janosik et al 2023). Description.…”

Section: Etheostoma Rupestre Gilbert and Swain 1887 Rock Dartermentioning

confidence: 99%

“…), yet no study has yet examined whether these different color patterns are indicative of distinct lineages. Janosik et al [2023] with permission from Springer Nature Publishing Company; subject to associated copyright policy) displaying the three allopatric lineages of Etheostoma rupestre. Bayesian posterior probabilities are displayed on the nodes.…”

Section: Introductionmentioning

confidence: 99%

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Incipient speciation in allopatric Etheostoma rupestre (Percidae: Etheostomatinae) lineages, with the description of three new subspecies

HILBURN,

JANOSIK,

JOHNSTON

2023

Zootaxa

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In recent years, new species descriptions for the North American darters have proliferated. Most species concepts accepted by contemporary ichthyologists require that a valid species be both monophyletic and diagnoseable, yet many lineages exhibit modal or range differences in morphological characteristics without individuals being diagnosable. Such scenarios present difficulties with regards to proper taxonomic recognition of divergent lineages and often prohibit appropriate conservation action. Following the example of recent authors, we provide meristic, geometric morphometric, and pigmentation data to support the recognition of three subspecies of Etheostoma rupestre, a species endemic to the Mobile Basin. These morphological data cohere with previous genetic work for E. rupestre. The nominate subspecies Etheostoma rupetsre rupestre (Tsai’s Rock Darter) is endemic to the Tombigbee River and Black Warrior River watersheds in Alabama and Mississippi and is characterized by having lower numbers of lateral blotches, lower range and mean of lateral line scales, lower modal number of scales above the lateral line, and lower degrees of nape squamation than other subspecies. Etheostoma rupestre piersoni (Shamrock Darter), ssp. nov., is endemic to the Cahaba and Alabama River Watersheds in Alabama and is characterized by intermediate counts of lateral blotches and higher scale counts and nape squamation than E. r. rupestre. Etheostoma rupestre uphapeense (Jade Darter), ssp. nov., is restricted to several small, disjunct populations in the Coosa and Tallapoosa watersheds in Alabama, Georgia, and Tennessee. Etheostoma r. uphapeense is characterized by having a higher mean number of lateral blotches than both other subspecies and higher scale counts than E. r. rupestre. While E. r. rupestre and E. r. piersoni are widespread and abundant within their respective ranges, E. r. uphapeense has a disjunct range and is often uncommon where it occurs. Etheostoma r. uphapeense should be monitored where it occurs to discern population trends.

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Section: Introductionmentioning

confidence: 80%

Section: Number Of Blotchesmentioning

confidence: 96%

Section: Etheostoma Rupestre Gilbert and Swain 1887 Rock Dartermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Incipient speciation in allopatric Etheostoma rupestre (Percidae: Etheostomatinae) lineages, with the description of three new subspecies

HILBURN,

JANOSIK,

JOHNSTON

2023

Zootaxa

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“…Understanding interactions among geological, climatic changes, and drainage systems, as well as their relationships with freshwater sh species, is important for understanding the mechanisms that affect their diversity, and to devise appropriate conservation strategies. Phylogeographic studies on freshwater sh have become focal points in regions such as North America (Ginson et al 2015;Janosik et al 2023), the Qinghai-Tibet Plateau (Guo et Skog et al 2014). Graylings in the genus Thymallus (Teleostei: Thymallidae) are widely distributed across Eurasia and North America, and they are renowned for their conservative reproductive behavior.…”

Section: Introductionmentioning

confidence: 99%

The freshwater fish genus Thymallus (Thymallidae) in the upper OB-Irtysh River: its evolutionary history and implications for conservation

Peng,

Han,

2024

Preprint

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Quaternary geological and climatic events in central Asia have influenced the evolutionary history of populations of endemic species, and patterns in their distribution. We investigate species of grayling (Thymallus) from the upper OB-Irtysh River, Xinjiang, China, using mitochondrial DNA sequences and 10 microsatellite markers. Phylogenetic analyses attribute this species to Thymallus brevicephalus, and validate its divergence from a sister taxon, the Mongolian grayling (Thymallus brevirostris) through geomorphological changes caused by uplift of the Altai Mountains. Microsatellite analysis using STRUCTURE and pairwise FST analysis reveals significant genetic differentiation between eastern and western T. brevicephalus populations, which we estimate to have diverged approximately 0.81 million years ago (MY). High haplotype and low nucleotide diversities, and patterns of population history, indicate the western population of T. brevicephalus has slowly expanded following the Last Glacial Maximum approximately 0.4–0.1 MY. Hardy–Weinberg disequilibrium and within-population inbreeding coefficients identify a founder effect in this species. The origin of T. brevicephalus corresponds to the uplift of the Altai Mountains. Simultaneously, internal differentiation and population expansion occurred during repeated Quaternary climatic glacial–interglacial cycles. If management of T. brevicephalus, an endemic fish species in the upper Irtysh River in the Altai Mountains, was an option, we recommend establishing two management units separated by the Crane River. Release activities should be carried out independently for the eastern and western populations, and international cooperation in conservation efforts should be strengthened.

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Phylogeography and population structure of the Rock Darter species complex, Etheostoma rupestre (Teleostomi: Percidae) across the Mobile River Basin

Cited by 2 publications

References 42 publications

Incipient speciation in allopatric Etheostoma rupestre (Percidae: Etheostomatinae) lineages, with the description of three new subspecies

Incipient speciation in allopatric Etheostoma rupestre (Percidae: Etheostomatinae) lineages, with the description of three new subspecies

The freshwater fish genus Thymallus (Thymallidae) in the upper OB-Irtysh River: its evolutionary history and implications for conservation

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