Inconsistent reproductive isolation revealed by interactions between<i>Catostomus</i>fish species

Mandeville, Elizabeth G.; Parchman, Thomas L.; Thompson, Kevin G.; Compton, Robert I.; Gelwicks, Kevin R.; Song, Se Jin; Buerkle, C. Alex

doi:10.1002/evl3.29

Cited by 60 publications

(128 citation statements)

References 88 publications

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“…To prepare genomic libraries for high throughput DNA sequencing, we first extracted DNA from fin tissue using Qiagen DNeasy Blood & Tissue kits according to the manufacturer's instructions, using a QIAcube robot (Qiagen, Inc.). We then prepared reduced‐complexity genomic libraries according to protocols in Parchman et al (), similar to previous sequencing projects involving fish with similarly sized genomes (Mandeville et al, , ; Underwood, Mandeville, & Walters, ; Walters et al, ). This genotyping‐by‐sequencing method involves first fragmenting DNA using restriction enzymes (EcoRI and MseI), then ligating unique 8–10 base pair (bp) nucleotide barcodes to the DNA of each individual fish.…”

Section: Methodsmentioning

confidence: 99%

“…The bivariate relationship of proportion of ancestry in each cluster ( q ) and interspecific ancestry ( Q ) allowed us to assign individuals to hybrid classes representing different histories of hybridization (e.g., F 1 , F 2 , backcrossed hybrids, and later‐generation recombinant hybrids; as in Gompert et al, , Lindtke, Gompert, Lexer, & Buerkle, , Mandeville et al, ). Yellowstone cutthroat individuals were identified as having q > 0.9 and Q ≤ 0.25.…”

Section: Methodsmentioning

confidence: 99%

“…We chose these criteria to bin individuals into categories based on two factors: q and Q values for reference individuals in this data set representing parental species, and also on applications of the entropy model to other data sets, including simulated data sets (Gompert et al, ; Lindtke et al, ; Mandeville et al, ). Both of these lines of evidence suggest that it is reasonable to expect among‐individual variation in q and Q within a hybrid class.…”

Section: Methodsmentioning

confidence: 99%

“…This variation might result from variation in outcomes of recombination, and potentially as a result of selection acting on some subset of ancestry combinations. Intraspecific variation in parental species can also affect q and Q estimates; Q estimates in particular are known to be depressed when there is intraspecific variation in parental species (Mandeville et al, ) or when parental species are closely related (see simulations in Lindtke et al, ). In these trout, it is likely that individuals with <10% ancestry in one cluster are a product of variable intraspecific ancestry in parental species due to historical stocking of both rainbow and cutthroat trout from multiple sources.…”

Section: Methodsmentioning

confidence: 99%

“…Taken together, the potential for both ecological and genetic effects on native species has led conservation practitioners to be deeply alarmed about the prospect of interspecific hybridization with non‐native species (Allendorf, Leary, Spruell, & Wenburg, ). However, it is far from straightforward to predict outcomes of hybridization, due to the potential for geographic variation in hybridization outcomes (Mandeville et al, ), incomplete understanding of the relative fitnesses of hybrids and parental species (Arnold, Ballerini, & Brothers, ), and the potential for environmental context to influence outcomes of hybridization (Hatfield & Schluter, ).…”

Section: Introductionmentioning

confidence: 99%

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Variable hybridization outcomes in trout are predicted by historical fish stocking and environmental context

et al. 2019

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Hybridization can profoundly affect the genomic composition and phenotypes of closely related species, and provides an opportunity to identify mechanisms that maintain reproductive isolation between species. Recent evidence suggests that hybridization outcomes within a species pair can vary across locations. However, we still do not know how variable outcomes of hybridization are across geographic replicates, and what mechanisms drive that variation. In this study, we described hybridization outcomes across 27 locations in the North Fork Shoshone River basin (Wyoming, USA) where native Yellowstone cutthroat trout and introduced rainbow trout co‐occur. We used genomic data and hierarchical Bayesian models to precisely identify ancestry of hybrid individuals. Hybridization outcomes varied across locations. In some locations, only rainbow trout and advanced backcrossed hybrids towards rainbow trout were present, while trout in other locations had a broader range of ancestry, including both parental species and first‐generation hybrids. Later‐generation intermediate hybrids were rare relative to backcrossed hybrids and rainbow trout individuals. Using an individual‐based simulation, we found that outcomes of hybridization in the North Fork Shoshone River basin deviate substantially from what we would expect under null expectations of random mating and no selection against hybrids. Since this deviation implies that some mechanisms of reproductive isolation function to maintain parental taxa and a diversity of hybrid types, we then modelled hybridization outcomes as a function of environmental variables and stocking history that are likely to affect prezygotic barriers to hybridization. Variables associated with history of fish stocking were the strongest predictors of hybridization outcomes, followed by environmental variables that might affect overlap in spawning time and location.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Variable hybridization outcomes in trout are predicted by historical fish stocking and environmental context

et al. 2019

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Strong philopatry in an estuarine‐dependent fish

Sarakinis,

Reis‐Santos,

Donnellan

et al. 2024

Ecology and Evolution

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Understanding fish movement is critical in determining the spatial scales in which to appropriately manage wild populations. Genetic markers provide a natural tagging approach to assess the degree of gene flow and population connectivity across a species distribution. We investigated the genetic structure of black bream Acanthopagrus butcheri across its entire distribution range in Australia, as well as regional scale gene flow across south‐eastern Australia by undertaking a comprehensive analysis of the populations in estuaries across the region. We applied genome‐wide sampling of single‐nucleotide polymorphism (SNP) markers generated from restriction site‐associated DNA sequencing. Genetic structure and potential gene flow was assessed using principal component analyses and admixture analyses (STRUCTURE). Using 33,493 SNPs, we detected broad scale genetic structuring, with limited gene flow among regional clusters (i.e. Western Australia, South Australia and western Victoria; and eastern Victoria, Tasmania and New South Wales). This is likely the result of unsuitable habitats, strong ocean currents (e.g. the Leeuwin Current and the East Australian Current), large water bodies (e.g. Bass Strait) and known biogeographical provinces across the continent. Local‐scale genetic structuring was also identified across the south‐eastern Australian estuaries sampled, reflecting that the coexistence of both migratory and resident individuals within populations (i.e. partial migration), and the movement of fish into coastal waters, still results in strong philopatry across the region. Instances of movement among estuaries at this spatial scale were primarily found between adjacent estuaries and were likely attributed to lone migrants utilising inshore coastal currents for movement beyond nearby habitats. Targeting SNP markers in A. butcheri at this continental scale highlighted how neither spatial proximity of estuaries nor black bream's ability to move into coastal waters reflects increased gene flow. Overall, our findings highlight the importance of location‐specific management.

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Influence of dams on sauger population structure and hybridization with introduced walleye

Rosenthal,

Mandeville,

Pilkerton

et al. 2024

Ecology and Evolution

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Dams have negatively affected freshwater biodiversity throughout the world. These negative effects tend to be exacerbated for aquatic taxa with migratory life histories, and for taxa whose habitat is fundamentally altered by the formation of large reservoirs. Sauger (Sander candadensis; Percidae), large‐bodied migratory fishes native to North America, have seen population declines over much of the species' range, and dams are often implicated for their role in blocking access to spawning habitat and otherwise negatively affecting river habitat. Furthermore, hybridization appears to be more frequent between sauger and walleye in the reservoirs formed by large dams. In this study, we examine the role of dams in altering sauger population connectivity and facilitating hybridization with introduced walleye in Wyoming's Wind River and Bighorn River systems. We collected genomic data from individuals sampled over a large spatial scale and replicated sampling throughout the spawning season, with the intent to capture potential variation in hybridization prevalence or genomic divergence between sauger with different life histories. The timing of sampling was not related to hybridization prevalence or population divergence, suggesting limited genetic differences between sauger spawning in different time and places. Overall, there was limited hybridization detected, however, hybridization was most prevalent in Boysen Reservoir (a large impounded section of the Wind River). Dams in the lower Wind River and upper Bighorn River were associated with population divergence between sauger upstream and downstream of the dams, and demographic models suggest that this divergence has occurred in concordance with the construction of the dam. Sauger upstream of the dams exhibited substantially lower estimates of genetic diversity, which implies that disrupted connectivity between Wind River and Bighorn River sauger populations may already be causing negative demographic effects. This research points towards the importance of considering the evolutionary consequences of dams on fish populations in addition to the threats they pose to population persistence.

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Inconsistent reproductive isolation revealed by interactions betweenCatostomusfish species

Cited by 60 publications

References 88 publications

Variable hybridization outcomes in trout are predicted by historical fish stocking and environmental context

Variable hybridization outcomes in trout are predicted by historical fish stocking and environmental context

Strong philopatry in an estuarine‐dependent fish

Influence of dams on sauger population structure and hybridization with introduced walleye

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