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88 results for “Percidae”
Data from: Response to MHC-based olfactory cues in a mate choice context in two species of darter (Percidae: Etheostoma)
<p>Mate choice is hypothesized to play an important role in maintaining high diversity at major histocompatibility complex (MHC) genes in vertebrates. Many studies have revealed that females across taxa prefer the scent of males with MHC genotypes different to their own. In this study we tested the "opposites-attract" hypothesis in two species of darter with known differences in female criteria used in mate choice: in the fantail darters (a paternal-care species), females prefer males with visual traits related to nest guarding and egg tending, while in rainbow darters (not a paternal-care species) female mate choice criteria are unknown. In dichotomous mate-choice trials, we presented females of both species with the scents of conspecific males with MHC class IIb genotypes that were either similar or dissimilar to that of the focal female. We evaluated the proportion of time each female spent with each male and calculated the average strength of female preference for both species. Female fantail darters demonstrated a preference for the scent of males with similar (rather than dissimilar) MHC genotypes, but this result was not statistically significant. Rainbow darter females showed no preference for the scent of males with similar or dissimilar MHC genotypes. Our results do not support the "opposites-attract" hypothesis in darters.</p>
Fig. 3 in Development Stability And Cytogenetic Homeostasis Of Perca Fluviatilis (Perciformes, Percidae) In The Rivers Of Rivne Region
Fig. 3. Comparison of Morphological and Cytogenetic Homeostasis Samples of P. fluviatilis in the Rivers of Rivne Region.
Fig. 1 in Development Stability And Cytogenetic Homeostasis Of Perca Fluviatilis (Perciformes, Percidae) In The Rivers Of Rivne Region
Fig. 1. Frequency of Nuclear Damages of P. fluviatilis Peripheral Blood Erythrocytes in the Rivers in Rivne Region: 1 — Styr River; 2 — Sluch River; 3 — Horyn River; 4 — Ustia River; 5 — Zamchysko River; 6 — Stubelka River; 7 — Ikva River.
Fig. 3 in A New Extinct Species Of Pikeperch Sander Svetovidovi (Teleostei, Percidae) From The Late Miocene Of Southern Ukraine
Fig. 3. Quadrate bone of some extinct and extant percid fishes: A–D — Sander svetovidovi sp. n., holotype (NMNH-P 41/4527); E–H — Sander lucioperca, extant (NMNH-P 1/191); I–L — Leobergia zaissanica, Zaissan, Kazakhstan (NMNH-P 52/45); M–P — Perca fluviatilis, extant (NMNH-P 1/176).
Fig. 2 in A New Extinct Species Of Pikeperch Sander Svetovidovi (Teleostei, Percidae) From The Late Miocene Of Southern Ukraine
Fig. 2. Quadrate bone of the recent Sander lucioperca (Linnaeus, 1758): A — lateral surface; B — medial surface.
Fig. 5 in MORPHOLOGICAL CHARACTERISTICS OF HYBRID PIKEPERCH (SANDER LUCIOPERCA f × SANDER VOLGENSIS m) (OSTEICHTHYES, PERCIDAE)
Fig. 5. Canonical analysis based on the eight most important morphological characters (Table 2) selected by the forward stepwise discriminant function analysis for S. lucioperca (square), S. volgensis (triangle) and their F1 hybrid (circle). 95% confidence ellipses are drawn around group centroids, and
Fig. 3 in MORPHOLOGICAL CHARACTERISTICS OF HYBRID PIKEPERCH (SANDER LUCIOPERCA f × SANDER VOLGENSIS m) (OSTEICHTHYES, PERCIDAE)
Fig. 3. Plots of scores of the first and second principal components (PC) for meristic (a) and morphometric characters (b) of S. lucioperca (square), S. volgensis (triangle) and their F1 hybrid (circle).
Fig. 4 in MORPHOLOGICAL CHARACTERISTICS OF HYBRID PIKEPERCH (SANDER LUCIOPERCA f × SANDER VOLGENSIS m) (OSTEICHTHYES, PERCIDAE)
Fig. 4. Variable loadings of principal component (PC) analyses of meristic and morphometric characters of S. lucioperca (square), S. volgensis (triangle) and their F1 hybrid (circle). a – meristic PC1; b – meristic PC2; c – morphometric PC1; morphometric PC2. Full names of analysed characters are
Fig. 2. a – S in MORPHOLOGICAL CHARACTERISTICS OF HYBRID PIKEPERCH (SANDER LUCIOPERCA f × SANDER VOLGENSIS m) (OSTEICHTHYES, PERCIDAE)
Fig. 2. a – S. lucioperca; b-d – S. lucioperca × S. volgensis F1 hybrids; e – S. volgensis; f – hybrid with deformed mandible
Fig. 1 in MORPHOLOGICAL CHARACTERISTICS OF HYBRID PIKEPERCH (SANDER LUCIOPERCA f × SANDER VOLGENSIS m) (OSTEICHTHYES, PERCIDAE)
Fig. 1. Morphometric characters used to differentiate Sander lucioperca and S. volgensis and their hybrid. Each measurement was taken as the shortest (direct) distance between two corresponding ref-
Data from: Integrative ichthyological species delimitation in the Greenthroat Darter complex (Percidae: Etheostomatinae)
<p>Species delimitation is fundamental to deciphering the mechanisms that generate and maintain biodiversity. Alpha taxonomy historically relied on expert knowledge to describe new species using phenotypic and biogeographic evidence, which has the appearance of investigator subjectivity. In contrast, DNA‐based methods using the multispecies coalescent model (MSC) promise a more objective approach to describing biodiversity. However, recent criticisms suggest that under some conditions the MSC may over‐split lineages, identifying species that do not reflect biological reality. Here, we reconcile these approaches using empirical data for the Greenthroat Darter complex (<em>Etheostoma lepidum</em>), a small freshwater fish species with a disjunct distribution in Texas and New Mexico, USA. We demonstrate that MSC methods recognizes all nine sampled populations as distinct species, sometimes splitting specimens from a single locality into multiple species. However, environmental, phenotypic and biogeographic evidence do not corroborate the nine species supported by the MSC. Instead, collective evidence indicates that <em>E. lepidum</em> is comprised of just three species that are consistent with the molecular phylogeny: <em>Etheostoma lepidum</em> (Greenthroat Darter) in rivers draining the eastern Edwards Plateau, <em>Etheostoma</em> cf. <em>lepidum</em> (Texas Darter) in the Concho and San Saba rivers and <em>Etheostoma</em> cf. <em>lepidum</em> (Pecos Darter) in the Pecos River. The Pecos Darter is likely highly imperiled due to its localized distribution and reliance on vanishing spring‐fed stream habitats. The impending biodiversity crisis makes integrative and swift species delimitation more necessary than ever. Our study exemplifies how classic taxonomic expertise combined with molecular phylogenetics can produce a more robust description of threatened biodiversity.</p>
Data from: Response to MHC-based olfactory cues in a mate choice context in two species of darter (Percidae: Etheostoma)
Open the record for dataset details and reuse information.
Data from: Integrative ichthyological species delimitation in the Greenthroat Darter complex (Percidae: Etheostomatinae)
Open the record for dataset details and reuse information.
Fig. 1 in The Morphological Characteristics Of The Danube Ruffe, Gymnocephalus Baloni (Perciformes, Percidae), In The Upper Reaches Of The Dnipro River, Ukraine
Fig. 1. Photo of Gymnocephalus baloni specimen from the upper reaches of the Dnipro.
Figure 1. Common percarina P. demidoffii from the Dniprovske Reservoir. Photo R in Invasion of the common percarina Percarina demidoffii (Percidae, Perciformes) in the Dnieper River upstream
Figure 1. Common percarina P. demidoffii from the Dniprovske Reservoir. Photo R. Novitskiy (2016).
Data from: Phylogeography, hybridization, and species discovery in the Etheostoma nigrum complex (Percidae: Etheostoma: Boleosoma)
<p class="MsoNormal">The history of riverine fish diversification is largely a product of geographic isolation. Physical barriers that reduce or eliminate gene flow between populations facilitate divergence via genetic drift and natural selection, eventually leading to speciation. For freshwater organisms, diversification is often the product of drainage basin rearrangements. In young clades where the history of isolation is the most recent, evolutionary relationships can resemble a tangled web. One especially recalcitrant group of freshwater fishes is the Johnny Darter (<em>Etheostoma nigrum</em>) species complex, where traditional taxonomy and molecular phylogenetics indicate a history of gene flow and conflicting inferences of species diversity. Here we assemble a genomic dataset using double digest restriction site associated DNA (ddRAD) sequencing and use phylogenomic and population genetic approaches to investigate the evolutionary history of the complex of species that includes <em>E. nigrum, E. olmstedi, E. perlongum, </em>and<em> E. susanae</em>. We reveal and validate several evolutionary lineages that we delimit as species, highlighting the need for additional work to formally describe the diversity of the <em>Etheostoma nigrum </em>complex. Our analyses also identify gene flow among recently diverged lineages, including one instance involving <em>E. susanae</em>, a localized and endangered species. Phylogeographic structure within the <em>Etheostoma nigrum </em>species complex coincides with major geologic events, such as parallel divergence in river basins during Pliocene inundation of the Atlantic coastal plain and multiple northward post-glacial colonization routes tracking river basin rearrangements. Our study serves as a nuanced example of how low dispersal rates coupled with geographic isolation among disconnected river systems in eastern North America have produced one of the world's freshwater biodiversity hotspots.</p>
Data from: Phylogeography, hybridization, and species discovery in the Etheostoma nigrum complex (Percidae: Etheostoma: Boleosoma)
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Comparative population genetics of the federally endangered Relict Darter, and its sister taxon the Clarks Darter (Teleostei: Percidae)
<p><span>The southeastern United States harbors one of the most diverse temperate freshwater fish faunas of the world. Unfortunately, due to improper land use practices and habitat degradation, many of the species in this region are imperiled and may become extinct without appropriate conservation efforts. This study examined the population dynamics of an endangered endemic darter of southwest Kentucky, the Relict Darter (</span><span>Etheostoma chienense</span><span>) and its sister taxon, the undescribed Clarks Darter (</span><span>Etheostoma </span><span>cf. </span><span>oophylax</span><span>). Mitochondrial sequence data coupled with SNP data were used to infer population structure, gene flow, genetic variation, and effective population sizes of both species. The results from this study, based on 160 individuals from nine localities, indicate that the endangered Relict Darter possesses limited genetic variation based on mitochondrial DNA haplotypes (N=4). In addition, SNP data (6.8k markers) further indicates limited genetic structure (K=1), as well as a low effective population size (143-918), suggesting that the Relict Darter can be managed as a single, panmictic conservation unit. It is suggested that conservation efforts be taken to protect remaining habitats, augment the system with artificial spawning substrates, and, as a last resort (if needed), supplement the natural population with captive reared individuals. </span><span>Ethesotoma </span><span>cf. </span><span>oophylax </span><span>showed some genetic variation among distant sites, but more samples are needed throughout the range in order to fully understand the population dynamics of this species.</span></p>
Data from: A new species of logperch endemic to Tennessee (Percidae: Etheostomatinae: Percina)
Percina apina, the Tennessee Logperch, is described as a new species endemic to Tennessee and distributed in the Duck River system and Whiteoak Creek. The earliest collection records for Percina apina date to 1971 and the species was identified as Percina burtoni, the Blotchside Logperch. A phylogenetic analysis of mitochondrial DNA (mtDNA) published in 2006 showed that populations identified as Percina burtoni in the Duck River system and Whiteoak Creek were a new and undescribed species. In this study, we test the hypothesis that Percina burtoni is composed of multiple species through analyses of mtDNA, nuclear genetic variation, and traditional meristic trait morphology. Our analyses of morphological divergence, nuclear genotypes, mtDNA gene trees, and comparisons with other sister species pairs of logperches confirm the distinctiveness of Percina apina. Morphologically, Percina apina is distinguished from Percina burtoni through higher average numbers of lateral line scales (93.1 versus 89.9); pored lateral line scales (91.6 versus 88.8); rows of transverse scales (38.1 versus 33.6); and scales around the caudal peduncle (36.2 versus 33.5). The two species also differ in patterns of pigmentation; the lateral blotches in Percina apina are typically wider than high, whereas the blotches tend to be higher than wide in Percina burtoni. We recommend that future species descriptions of North American freshwater fishes leverage available genetic resources and include molecular phylogenetic assessments in analyses of taxon distinctiveness. In addition, we advocate the deposition of morphological data used in species descriptions to online data repositories to ensure that other researchers are able to evaluate and modify hypotheses of species delimitations.
Data from: A new barcheek darter species from Buck Creek (Cumberland River System), Kentucky (Percidae: Etheostomatinae: Catonotus: Oopareia)
Etheostoma nebra, the Buck Darter, is described as a new species endemic to the Buck Creek system of the Cumberland River drainage in Kentucky, USA. The earliest collection records of Etheostoma nebra date to 1955 and were considered a population of Etheostoma virgatum. Etheostoma nebra is delimited through morphological comparisons with Etheostoma virgatum and phylogenetic analyses using DNA sequences from a mitochondrial gene and five nuclear genes. Etheostoma nebra is distinguished from Etheostoma virgatum by a lower number of total lateral scales, fewer pored lateral scales and modally 13 compared with 12 pectoral fin rays. The two species also differ in patterns of pigmentation and nuptial male coloration. In the molecular phylogenies, Etheostoma nebra is not resolved as the sister species of Etheostoma virgatum. A review of all museum collection records of Etheostoma nebra and extensive field surveys in the Buck Creek system demonstrate a dramatic decline of the species over the past 30 years. Collections made from 1955 to 1981 show that Etheostoma nebra was widespread throughout the Buck Creek system, but the species is currently restricted to a small portion of Flat Lick Creek. Etheostoma nebra is critically imperiled based on its restricted geographic distribution and documented disappearance of populations within the Buck Creek system during the past three decades.
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