A review of catfish (Siluriformes) hybridization

Reviews in Fish Biology and Fisheries, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Язык: Английский

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Impoundments facilitate upstream invasion and introgression: Case studies of fluvial black basses (Micropterus spp.) in the southeastern USA

PLoS ONE, Год журнала: 2025, Номер 20(2), С. e0315620 - e0315620

Опубликована: Фев. 5, 2025

Impoundment construction has resulted in the alternation and loss of fluvial habitats, threatening persistence many native fishes. Compounding this threat, non-native species stocked into impoundments often invade interconnected where they may negatively affect species. Black basses (genus Micropteru s) are popular sportfishes with divergent ecologies: some taxa tolerant widely to create fishing opportunities, whereas others endemic specialists that threatened by introgression congeneric taxa. We investigated whether facilitate invasion two case study systems: Lake Lanier, Georgia, Tenkiller, Oklahoma. In both studies, inhabited upstream tributaries a was established within downstream impoundment. Results from longitudinal surveys provided clear evidence non-natives invaded impoundments, cases, extensive also occurred. Variation spatial trends directionalities across studies insights eco-evolutionary drivers. Within riverscapes studied, proximity impoundment appeared influence dynamics, one case, stream size influential. Introgression rates varied markedly pairs studied–from very little onset hybrid swarming–illustrating importance underlying mechanisms such as habitat alteration, propagule pressure, reproductive isolation. Our results underscore need consider influences them, more holistic riverscape conservation plans for fishes, including black basses.

Язык: Английский

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Cryptic species, biogeography, and patterns of introgression in the fish genus Mogurnda (Eleotridae) from the Australian wet tropics: A purple patch for purple-spots

Molecular Phylogenetics and Evolution, Год журнала: 2025, Номер unknown, С. 108344 - 108344

Опубликована: Апрель 1, 2025

Язык: Английский

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Linking genetic and morphological data to identify closely related and co-occurring catostomid fishes

North American Journal of Fisheries Management, Год журнала: 2025, Номер unknown

Опубликована: Май 20, 2025

ABSTRACT Objective Loss of biodiversity is a critical factor affecting ecosystem health. Yet, evaluating the presence and abundance species can be hampered by ability to identify similar co-occurring species. Although molecular approaches are being increasingly used species, quantifying simplest when biologists specimens visually. The taxonomy sucker Pantosteus western North America has recently been revised based on phylogenetics but without verified means identifying they captured in wild. In this study, we pair morphological data distinguishing characteristics between Bluehead Suckers discobolus, Green P. virescens, Mountain platyrhynchus. Methods We collected genetic samples populations from across their range Snake River, Bonneville Basin, Colorado River United States. generated mitochondrial nuclear DNA sequence paired it with measurements fish digital photographs live specimens. Results Mitochondrial separated Snake/Bonneville watersheds did not separate watershed. Nuclear all three watersheds. Differences body depth, head size, fin length, scales lateral line were variables that distinguished develop discriminant function predict membership high accuracy. Conclusions Molecular fishes may otherwise go unrecognized. When meristic data, inform how closely related suckers offer cost-effective method developing monitoring programs.

Язык: Английский

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Reticulate evolution as a management challenge: Patterns of admixture with phylogenetic distance in endemic fishes of western North America

Evolutionary Applications, Год журнала: 2020, Номер 13(6), С. 1400 - 1419

Опубликована: Июнь 15, 2020

Admixture in natural populations is a long-standing management challenge, with population genomic approaches offering means for adjudication. We now more clearly understand the permeability of species boundaries and potential admixture promoting adaptive evolution. These issues particularly resonate western North America, where tectonism aridity have fragmented reshuffled rivers over millennia, turn reticulation among endemic fishes, situation compounded by anthropogenic habitat modifications non-native introductions. The melding historic contemporary has both confused stymied management. underscore this case study that quantifies basin-wide group native introduced fishes employing double-digest restriction site-associated DNA (ddRAD) sequencing. Our approach: (a) admixed history 343 suckers (10 Catostomidae) across Colorado River Basin; (b) gauges within context phylogenetic distance "ecological specialization"; (c) extrapolates drivers introgression hybrid crosses involve as well invasive species. extends an entire freshwater basin expands previous studies limited scope geographically taxonomically. results detected involving all 10 species, alterations not only accelerating breakdown reproductive isolation, but also introgression. Hybridization occurred genus despite distance, whereas was subgenera, implicating and/or ecological specialization isolation. Understanding extent isolation multiple serves to disentangle their reticulate evolutionary histories provides broadscale perspective conservation

Язык: Английский

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Defining relictual biodiversity: Conservation units in speckled dace (Leuciscidae: Rhinichthys osculus) of the Greater Death Valley ecosystem

Ecology and Evolution, Год журнала: 2020, Номер 10(19), С. 10798 - 10817

Опубликована: Сен. 1, 2020

Abstract The tips in the tree of life serve as foci for conservation and management, yet clear delimitations are masked by inherent variance at species–population interface. Analyses using thousands nuclear loci can potentially sort inconsistencies, standard categories applied to this parsing themselves conflicting and/or subjective [e.g., DPS (distinct population segments); DUs (Diagnosable Units‐Canada); MUs (management units); SSP (subspecies); ESUs (Evolutionarily Significant Units); UIEUs (uniquely identified evolutionary units)]. One potential solution consistent categorization is create a comparative framework accumulating statistical results from independent studies evaluating congruence among data sets. Our study illustrates approach speckled dace (Leuciscidae: Rhinichthys osculus ) endemic two basins (Owens Amargosa) Death Valley ecosystem. These fish persist Mojave Desert isolated Plio‐Pleistocene relicts concern, but lack formal taxonomic descriptions/designations. Double digest RAD (ddRAD) methods 14,355 SNP across 10 populations ( N = 140). Species delimitation analyses [multispecies coalescent (MSC) unsupervised machine learning (UML)] delineated four putative ESUs. F ST outlier 106) were juxtaposed uncover localized adaptations. We detected one hybrid that resulted upstream reconnection habitat following contemporary pluvial periods, whereas remaining represent relics ancient tectonism within geographically springs groundwater‐fed streams. offers three salient conclusions: blueprint multifaceted units; proposed mechanism which criteria intraspecific biodiversity be standardized; strong argument proactive management critically endangered ecosystem fishes.

Язык: Английский

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Evaluating a species phylogeny using ddRAD SNPs: Cyto-nuclear discordance and introgression in the salmonid genus Thymallus (Salmonidae)

Molecular Phylogenetics and Evolution, Год журнала: 2022, Номер 178, С. 107654 - 107654

Опубликована: Ноя. 3, 2022

Язык: Английский

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A community genomics approach to natural hybridization

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2023, Номер 290(1999)

Опубликована: Май 16, 2023

Hybridization is a complicated, oft-misunderstood process. Once deemed unnatural and uncommon, hybridization now recognized as ubiquitous among species. But rates within communities are poorly understood despite the relevance to ecology, evolution conservation. To clarify, we examined across 75 freshwater fish Ozarks of North American Interior Highlands (USA) by single nucleotide polymorphism (SNP) genotyping 33 species (

Язык: Английский

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Hybridization in the Anthropocene – how pollution and climate change disrupt mate selection in freshwater fish

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2024, Номер unknown

Опубликована: Авг. 2, 2024

ABSTRACT Chemical pollutants and/or climate change have the potential to break down reproductive barriers between species and facilitate hybridization. Hybrid zones may arise in response environmental gradients secondary contact formerly allopatric populations, or due introduction of non‐native species. In freshwater ecosystems, field observations indicate that changes water quality chemistry, pollution change, are correlated with an increased frequency Physical chemical disturbances can alter sensory environment, thereby affecting visual communication among fish. Moreover, multiple compounds (e.g. pharmaceuticals, metals, pesticides, industrial contaminants) impair fish physiology, potentially phenotypic traits relevant for mate selection pheromone production, courtship, coloration). Although warming waters led documented range shifts, is ubiquitous few studies tested hypotheses about how these stressors hybridization what this means biodiversity conservation. Through a systematic literature review across disciplines (i.e. ecotoxicology evolutionary biology), we evaluate biological interactions, toxic mechanisms, roles physical change) disrupting preferences inducing interspecific Our study indicates change‐driven impact crucial choice thus could fishes ecosystems. To inform future conservation management, emphasize importance further research identify choice, understand mechanisms behind determine concentrations at which they occur, assess their on individuals, species, diversity Anthropocene.

Язык: Английский

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The Himalayan uplift and evolution of aquatic biodiversity across Asia: Snowtrout (Cyprininae: Schizothorax) as a test case

PLoS ONE, Год журнала: 2023, Номер 18(10), С. e0289736 - e0289736

Опубликована: Окт. 24, 2023

Global biodiversity hotspots are often remote, tectonically active areas undergoing climatic fluctuations, such as the Himalaya Mountains and neighboring Qinghai-Tibetan Plateau (QTP). They provide biogeographic templates upon which endemic can be mapped to infer diversification scenarios. Yet, this process somewhat opaque for Himalaya, given substantial data gaps separating eastern western regions. To help clarify, we evaluated phylogeographic phylogenetic hypotheses a widespread fish (Snowtrout: Cyprininae; Schizothorax) by sequencing 1,140 base pair of mtDNA cytochrome-b (cytb) from Central samples (Nepal: N = 53; Bhutan: 19), augmented with 68 GenBank sequences (N 60 Schizothorax/N 8 outgroups). Genealogical relationships 132) were analyzed via maximum likelihood (ML), Bayesian (BA), haplotype network clustering, clade divergence estimated TimeTree. Snowtrout seemingly originated in Asia, dispersed across QTP, then into Bhutan southward-flowing tributaries east-flowing Yarlung-Tsangpo River (YLTR). Headwaters five large Asian rivers provided dispersal corridors eastern/southeastern Asia. South YLTR transitions Brahmaputra River, facilitating successive westward colonization Himalayan drainages first Bhutan, Nepal, followed far-western subsequently captured (now) westward-flowing Indus River. Two distinct Bhutanese groups recovered: Bhutan-1 (with three subclades) represents southward QTP; Bhutan-2 apparently illustrates northward Lower Brahmaputra. The close phylogenetic/phylogeographic between (Pakistan) Upper Ganges (India/Nepal) potentially implicate an historic, now disjunct connection. Greater species-divergences occurred rather than within-basins, suggesting vicariance driver. is component Earth's largest glacial reservoir (i.e., "third-pole") separate Arctic/Antarctic. Its unique aquatic must defined conserved through broad, trans-national collaborations. Our study provides initial baseline process.

Язык: Английский

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