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258 results for “freshwater mussel”
Obovaria olivaria maf filtered vcf file from: RAD-tag and mitochondrial DNA sequencing reveal the genetic structure of a widespread and regionally imperiled freshwater mussel, Obovaria olivaria (Bivalvia: Unionidae)
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Data from: No evidence for host specialization or host-race formation in the European bitterling (Rhodeus amarus), a fish that parasitizes freshwater mussels
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Supplementary data for the manuscript "Flow and Entrainment Mechanisms around a Freshwater Mussel Aligned with the Incoming Flow"
<p>This repository is associated with the manuscript for Water Resource Research (WRR): Flow and Entrainment Mechanisms around a Freshwater Mussel Aligned with the Incoming Flow. The repository contains the data files for the manuscript.</p>
Data from: High levels of multiple paternity in a spermcast mating freshwater mussel
Multiple paternity is an important characteristic of the genetic mating system and common across a wide range of taxa. Multiple paternity can increase within-population genotypic diversity, allowing selection to act on a wider spectre of genotypes, and potentially increasing effective population size. While the genetic mating system has been studied in many species with active mating behaviour, little is known about multiple paternity in sessile species releasing gametes into the water. In freshwater mussels, males release sperm into the water, while eggs are retained and fertilised inside the female (spermcast mating). Mature parasitic glochidia are released into the water and attach to the gills of fish where they are encapsulated until settling in the bottom substrate. We used 15 microsatellite markers to detect multiple paternity in a wild population of the freshwater pearl mussel (Margaritifera margaritifera). We found multiple paternity in all clutches for which more than two offspring were genotyped and numbers of sires were extremely high. Thirty-two sires had contributed to the largest clutch (43 offspring sampled). This study provides the first evidence of multiple paternity in the freshwater pearl mussel, a species that has experienced dramatic declines across Europe. Previous studies on other species of freshwater mussels have detected much lower numbers of sires. Multiple paternity in freshwater pearl mussels may be central for maintaining genetic variability in small and fragmented populations and for their potential to recover after habitat restoration, and may also be important in the evolutionary arms race with their fish host with a much shorter generation time.
Data from: Flow, flux and feeding in freshwater mussels
Unionid mussels are important constituents of aquatic systems that are affected by anthropogenic changes in hydrology and concomitant increases in suspended solids, yet little is known about the effects of flow on their suspension feeding. We examined the clearance rates (CR) of four species of freshwater mussels (Lampsilis siliquoidea, Lampsilis fasciola, Ligumia nasuta and Villosa iris) to determine whether they feed selectively on river seston and how this may vary with algal flux (concentration × velocity). The CR for the Lampsilis species was also determined using seston particle size, particle fluorescence, and algal taxon. The CR of all species increased linearly with flow chamber velocity, but exhibited saturation-like kinetics with increasing algal flux. The CR of Lampsilis species were higher for larger (>10 um) vs. smaller (<10 um) particles, the latter of which were numerically dominant in river seston. The CR of Lampsilis mussels on most of the algal taxa declined (linearly or non-linearly) with algal flux indicating that mussels have reduced ability to discriminate among algae at higher flux. This potential feeding limitation could affect mussel growth and survival and make unionids vulnerable to the aforementioned hydrological changes. Ecologically, differential use of algal taxa under different algal flux indicates selective feeding, which may be evidence of resource partitioning for mussel species that occupy the same rivers. The differential use of algal taxa under different algal flux within a mussel species indicates the complex nature of bivalve feeding, their habitat requirements, and their vulnerability to human impacts.
FIG. 4 in DNA barcoding revealed the presence of the invasive freshwater mussel Sinanodonta aff. woodiana (Lea, 1834) in Afghanistan
FIG. 4. — Median joining network for COI sequences of Sinanodonta aff. woodiana (N = 100; Lineage E (Table 1)). The numbers near branches show the number of mutation sites.
FIG. 1 in DNA barcoding revealed the presence of the invasive freshwater mussel Sinanodonta aff. woodiana (Lea, 1834) in Afghanistan
FIG. 1. — Map illustrating Amu Darya River position; Point 1 (red circle) indicates sampling site of Sinanodonta aff. woodiana (Lea, 1834) in Amu Darya River in Kunduz Province, Afghanistan.
Declining freshwater mussel diversity in the middle and lower reaches of the Xin River Basin: Threat and Conservation
<p>Freshwater mussels provide important functions and services for aquatic ecosystems, but populations of many species have been extirpated. Information on biodiversity plays an important role in the conservation and management of freshwater mussels. The Xin River Basin is a biodiversity hotspot for freshwater mussels in China, with more than 43 species known, but populations of which are decreasing. Here, we quantify the diversity of freshwater mussels in the middle and lower reaches of the Xin River Basin and study the correlation of habitat characteristics and freshwater mussel diversity. Compared to the historical period, the number of species, density and biomass of freshwater mussels decreased 33%, 83% and 82% in the current period, respectively. 52% of recorded species were empty shells, and 14 native freshwater mussels were not found in the study area. Four species are currently listed as vulnerable species using IUCN criteria and their global status. The assemblage structure of freshwater mussels exhibits significant spatial differences, and there was a correlation with substrate and physicochemical parameters. The main tributary of the Xin River with higher freshwater mussel diversity should be established as one large protected area because the nestedness component was the main pattern of beta diversity. These results indicated freshwater mussel diversity was declining rapidly, which can help focus conservation effort for freshwater mussel biodiversity.</p>
Figure 6 in Populations of Microcondylaea bonellii (Férussac 1827), Unionidae - an european freshwater mussel at rapid decline - and Unio mancus in Istria, Croatia
Figure 6. Adult Microcondylaea bonellii from Butoniga (1.10.2011), note the arboriform siphonal papillae typical for this species.
Figure 9 in A taxonomic revision of fossil freshwater pearl mussels (Bivalvia: Unionoida: Margaritiferidae) from Pliocene and Pleistocene deposits of Southeastern Europe
Figure 9. Mantle attachment scars on the inner side of subfossil shell of Pseudunio flabellatiformis comb. rev. from the Sucleia outcrop, paleo-Dniester River valley, Middle Pleistocene, Moldova (RMBH, voucher no. Sc5). Scale bar = 10 mm. Photo: Artem A. Lyubas.
Figure 1 in A taxonomic revision of fossil freshwater pearl mussels (Bivalvia: Unionoida: Margaritiferidae) from Pliocene and Pleistocene deposits of Southeastern Europe
Figure 1. Stratigraphic profile of the Sucleia outcrop, paleo-Dniester River valley, Middle Pleistocene, Moldova. The thickness of outcrop in the studied area is 4.6 m. Layers: (1) 0 -40 cm – light-yellow sand with small pebbles; 2) 40-290 cm – light-brown gravel with gray sand and Pseudunio shells; 3) 290-370 cm – coarse pebble with sand and numerous Pseudunio shells; 4) 370-460 cm – pebble with light-brown sand and Pseudunio shells. Photo: Teodor F. Obada.
Supplementary material 1 from: Wu R-W, Liu X-J, Wang S, Roe KJ, Ouyang S, Wu X-P (2019) Analysis of mitochondrial genomes resolves the phylogenetic position of Chinese freshwater mussels (Bivalvia, Unionidae). ZooKeys 812: 23-46. https://doi.org/10.3897/zookeys.812.29908
: Data type: molecular data
Figure 4 from: Wu R-W, Liu X-J, Wang S, Roe KJ, Ouyang S, Wu X-P (2019) Analysis of mitochondrial genomes resolves the phylogenetic position of Chinese freshwater mussels (Bivalvia, Unionidae). ZooKeys 812: 23-46. https://doi.org/10.3897/zookeys.812.29908
Figure 4 Hypotheses of phylogenetic relationships among subfamilies of the Unionidae form this and other studies. ALopes-Lima et al. (2017a)BBolotov et al. (2017a)CHuang et al. 2013; Burzyński et al. 2017; Huang et al. 2018; Wu et al. 2016, 2017bD This study.
Figure 2 from: Wu R-W, Liu X-J, Wang S, Roe KJ, Ouyang S, Wu X-P (2019) Analysis of mitochondrial genomes resolves the phylogenetic position of Chinese freshwater mussels (Bivalvia, Unionidae). ZooKeys 812: 23-46. https://doi.org/10.3897/zookeys.812.29908
Figure 2 The gene arrangement of the F-type mitochondrial genome of Acuticostachinensis, Schistodesmuslampreyanus, Cuneopsisheudei, and Cuneopsiscapitatus.
Figure 3 from: Wu R-W, Liu X-J, Wang S, Roe KJ, Ouyang S, Wu X-P (2019) Analysis of mitochondrial genomes resolves the phylogenetic position of Chinese freshwater mussels (Bivalvia, Unionidae). ZooKeys 812: 23-46. https://doi.org/10.3897/zookeys.812.29908
Figure 3 Phylogenetic trees of freshwater mussels obtained by Bayesian Inference (BI) and Maximum Likelihood (ML) analyses of 12 mitochondrial protein-coding gene sequences (except atp8) and two rRNA combined dataset. Support values above the branches are posterior probabilities and bootstrap support. (*) indicates 100 percent bootstrap support and posterior probabilities. Red font indicates Chinese species.
Figure 1 from: Wu R-W, Liu X-J, Wang S, Roe KJ, Ouyang S, Wu X-P (2019) Analysis of mitochondrial genomes resolves the phylogenetic position of Chinese freshwater mussels (Bivalvia, Unionidae). ZooKeys 812: 23-46. https://doi.org/10.3897/zookeys.812.29908
Figure 1 Shells of the unionids species in this study. AAcuticostachinensis (Lea, 1868) BSchistodesmuslampreyanus (Baird & Adams, 1867) CCuneopsisheudei (Heude, 1874) DCuneopsiscapitatus (Heude, 1874). Scale bar: 4 cm. Photogaphs R-W Wu.
Figure 1 from: Bolotov IN, Vikhrev IV, Lopes-Lima M, Gofarov MY, Konopleva ES, Lunn Z, Chan N, Bogan AE (2019) Indonaia rectangularis (Tapparone-Canefri, 1889), comb. nov., a forgotten freshwater mussel species from Myanmar (Bivalvia, Unionidae). ZooKeys 852: 23-30. https://doi.org/10.3897/zookeys.852.33898
Figure 1 Holotype of Indonaiarectangularis (Tapparone-Canefri, 1889), comb. nov. [MSNG]. A, B Shell, lateral view: inner side of the left valve and outer side of the right valve (A); vice versa (B) C shell, dorsal view D original label [probably by C.M. Tapparone-Canefri] E, F secondary labels [probably by B. Prashad]. Scale bar: 5 mm. (Photos: Ilya V. Vikhrev).
Figure 3 from: Bolotov IN, Vikhrev IV, Lopes-Lima M, Gofarov MY, Konopleva ES, Lunn Z, Chan N, Bogan AE (2019) Indonaia rectangularis (Tapparone-Canefri, 1889), comb. nov., a forgotten freshwater mussel species from Myanmar (Bivalvia, Unionidae). ZooKeys 852: 23-30. https://doi.org/10.3897/zookeys.852.33898
Figure 3 Map of the type locality of Indonaiarectangularis (Tapparone-Canefri, 1889), comb. nov. (dark blue circle). The digital elevation model and other layers of the map were added from the Esri Data & Maps 10 dataset.
Figure 2 from: Bolotov IN, Vikhrev IV, Lopes-Lima M, Gofarov MY, Konopleva ES, Lunn Z, Chan N, Bogan AE (2019) Indonaia rectangularis (Tapparone-Canefri, 1889), comb. nov., a forgotten freshwater mussel species from Myanmar (Bivalvia, Unionidae). ZooKeys 852: 23-30. https://doi.org/10.3897/zookeys.852.33898
Figure 2 Specimens of Indonaiaandersoniana (Nevill, 1877) and I.subclathrata (Martens, 1899) from Myanmar [RMBH biv450_2 and RMBH biv347_2, respectively]. A, B Shell of I.andersoniana, lateral view: inner side of the left valve and outer side of the right valve (A); vice versa (B) C shell of I.andersoniana, dorsal view D, E shell of I.subclathrata, lateral view: inner side of the left valve and outer side of the right valve (D); vice versa (E) F shell of I.subclathrata, dorsal view. Scale bar: 5 mm. (Photos: Ekaterina S. Konopleva).
Fig. 9 in Pathobiology and first report of larval nematodes (Ascaridomorpha sp.) infecting freshwater mussels (Villosa nebulosa, Unionidae), including an inventory of nematode infections in freshwater and marine bivalves
Fig. 9. Second-stage larva of Ascaridomorpha sp. (Nematoda) infecting Villosa nebulosa, in lateral view. Body showing tripartite esophagus ([es], 1st part representing pharynx [p], 2nd part representing muscular anterior portion [amp], 3rd part representing muscular posterior portion [pme]), nerve ring (nr), genital primordium (gp), and anus (a).
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