Conservation Assessment of the Yazoo Darter (<i>Etheostoma raneyi</i>)

Sterling, Ken A.; Warren, Warren L.; L.Gayle, Henderson

doi:10.1656/058.012.0429

Cited by 12 publications

(22 citation statements)

References 17 publications

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“…Habitat and associated fish assemblage stability in this system (Schaefer, Clark, & Warren, 2012, Table S1) allowed us to model the occupancy and coexistence of redspot and goldstripe darters with data collected at 53 historic (1999-2003Sterling et al, 2013) and 44 contemporary (2015-2016) sites (97 sites total, Table S2) ( Figure 1). Of the 44 currently surveyed sites, 39 had never been previously sampled.…”

Section: Datasetsmentioning

confidence: 99%

Modelling patterns of coexistence of three congeneric headwater fishes

et al. 2020

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Mechanisms driving patterns of occurrence and co-occurrence among NorthAmerican freshwater fishes are poorly understood. In particular, the influence of biotic interactions on coexistence among stream reaches and their effects on regional species distribution patterns is not well understood for congeneric headwater fishes.2. Occupancy models provide a useful framework for examining patterns of co-occurrence while also accounting for imperfect detection. Occupancy models may be extended to test for evidence that a dominant species influences the occurrence of a subordinate species and thus evaluate support for the hypothesis that species interactions drive patterns of coexistence.3. We examined patterns of occurrence and co-occurrence at the stream-reach scale among three species of darters (Percidae: Etheostomatinae) that occupy headwater streams within a Gulf Coastal Plain drainage in the south-eastern U.S.A. We assessed species occurrences at 97 sites in first-to third-order streams on one occasion each and used data from four sub-reaches sampled with equal effort at each site to estimate species-specific detection probabilities. Following sampling, a suite of habitat variables was collected at three equidistant points along each of the three transects established within a sub-reach. Coarse (stream-segment, catchment, network) scale variables were also incorporated using geospatial data.Single-species and two-species occupancy models were used to examine patterns of occupancy and coexistence. The occupancy of each species was influenced by distinct habitat variables.Goldstripe darters (Etheostoma parvipinne) were constrained by a stream size gradient, groundwater input appeared to influence the occurrence of Yazoo darters (Etheostoma raneyi), and local habitat heterogeneity (e.g. variation in depth and current velocity) appeared to influence the occupancy of redspot darters (Etheostoma artesiae). 5.We found no evidence that the presence of one species influenced the occurrence of another within a stream-reach based on two-species occupancy models.Rather, species co-occurrences were best explained as independent occurrences within a stream-reach according to species-specific habitat associations.

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Section: Datasetsmentioning

confidence: 99%

Modelling patterns of coexistence of three congeneric headwater fishes

et al. 2020

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“…A life history study of E. faulkneri was conducted at Morris Creek (Johnston & Haag, 1996), results of which are consistent with the literature for other clade Adonia snubnose darters (Carney & Burr, 1989;Khudamrongsawat & Kuhajda, 2007;Barton & Powers, 2010 (Knight & Cooper, 1987). Genetic studies indicate that E. faulkneri has lower genetic diversity relative to E. raneyi, likely suffers from decreased gene flow because of anthropogenic habitat destruction and fragmentation, and effective population sizes are likely dangerously low (Powers & Warren, 2009;Sterling 2011;Sterling et al 2012;Sterling et al 2020) Conservation management Etheostoma faulkneri is restricted to one headwater drainage in the upper Yazoo River basin with a total area of only about 1500 km 2 (relative to about 3200 km 2 for E. raneyi) and is distributed almost entirely on private lands (Sterling et al, 2013 (Shields et al, 1995;Warren et al, 2002;Keck & Etnier, 2005;Fore et al, 2019). Manuscript to be reviewed development and appears to hold the largest connected population of E. faulkneri , 2013…”

Section: Habitatbiology and Population Geneticsmentioning

confidence: 99%

“…of north-central Mississippi in the upper Yazoo River basin (Figure 1). Etheostoma raneyi avoids the bottomland streams of the Mississippi Alluvial Plain and is limited to relatively higher-gradient, perennial streams draining sandy geologic formations of the Upper Gulf Coastal Plain (Stephenson et al, 1928;Randolph & Kennedy, 1974;Thompson & Muncy, 1986;Suttkus et al, 1994;Thompson, 2011;Sterling et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Description of a new species of cryptic snubnose darter (Percidae: Etheostomatinae) endemic to north-central Mississippi (v0.1)"

2020

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Many subclades within the large North American freshwater fish genus Etheostoma (Percidae) show brilliant male nuptial coloration during the spring spawning season. Traditionally, perceived differences in color were often used to diagnose closely related species. More recently, perceived differences in male nuptial color have prompted further investigation of potential biodiversity using genetic tools. However, cryptic diversity among Etheostoma darters renders male nuptial color as unreliable for detecting and describing diversity, which is foundational for research and conservation efforts of this group of stream fishes. Etheostoma raneyi (Yazoo Darter) is an imperiled, range-limited fish endemic to north-central Mississippi. Existing genetic evidence indicates cryptic diversity between disjunctly distributed E. raneyi from the Little Tallahatchie and Yocona river watersheds despite no obvious differences in male color between the two drainages. Analysis of morphological truss and geometric measurements and meristic and male color characters yielded quantitative differences in E. raneyi from the two drainages consistent with genetic evidence. Morphological divergence is best explained by differences in stream gradients between the two drainages. Etheostoma faulkneri, the Yoknapatawpha Darter, is described as a species under the unified species concept. The discovery of cryptic diversity within E. raneyi would likely not have occurred without genetic tools. Cryptic diversity among Etheostoma darters and other stream fishes is common, but an overreliance on traditional methods of species delimitation (e.g., identification of a readily observable physical character to diagnose a species) impedes a full accounting of the diversity in freshwater fishes in the southeastern United States.

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“…Manuscript to be reviewed lacking a swim bladder (Page, 1983;Johnston & Haag, 1996;Sterling, Warren & Henderson, 2013). Long distance movements for spawning or feeding are not documented for snubnose darter species.…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Cryptic diversity among Yazoo Darters (Percidae: Etheostoma raneyi) in disjunct watersheds of northern Mississippi (v0.1)"

2020

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The Yazoo Darter, Etheostoma raneyi (Percidae), is an imperiled freshwater fish species endemic to tributaries of the Yocona and Little Tallahatchie rivers of the upper Yazoo River basin, in northern Mississippi, USA. The two populations are allopatric, isolated by unsuitable lowland habitat between the two river drainages. Relevant literature suggests that populations in the Yocona River represent an undescribed species but a lack of data prevents a thorough evaluation of possible diversity throughout the range of the species. Our goals were to estimate phylogenetic relationships of the Yazoo Darter across its distribution and identify cryptic diversity for conservation management purposes. Maximum likelihood (ML) phylogenetic analyses of the mitochondrial cytochrome b (cytb) gene returned two reciprocally monophyletic clades representing the two river drainages with high support. Bayesian analysis of cytb was consistent with the ML analysis but with low support for the Yocona River clade. Analyses of the nuclear S7 gene yielded unresolved relationships among individuals in the Little Tallahatchie River drainage with mostly low support, but returned a monophyletic clade for individuals from the Yocona River drainage with high support. No haplotypes were shared between the drainages for either gene. Additional cryptic diversity within the two drainages was not indicated. Estimated divergence between Yazoo Darters in the two drainages occurred during the Pleistocene (<1 million years ago) and was likely linked to repeated spatial shifts in suitable habitat and changes in watershed configurations during glacial cycles. Individuals from the Yocona River drainage had lower genetic diversity consistent with the literature. Our results indicate that Yazoo Darters in the Yocona River drainage are genetically distinct and that there is support for recognizing Yazoo Darter populations in the Yocona River drainage as a new species under the unified species concept.

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Conservation Assessment of the Yazoo Darter (Etheostoma raneyi)

Cited by 12 publications

References 17 publications

Modelling patterns of coexistence of three congeneric headwater fishes

Modelling patterns of coexistence of three congeneric headwater fishes

Peer Review #1 of "Description of a new species of cryptic snubnose darter (Percidae: Etheostomatinae) endemic to north-central Mississippi (v0.1)"

Peer Review #1 of "Cryptic diversity among Yazoo Darters (Percidae: Etheostoma raneyi) in disjunct watersheds of northern Mississippi (v0.1)"

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