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53 results for “Dreissena”
Figure 3 in First record of metacercariae trematodes Opisthioglyphe ranae (Digenea: Telorchiidae) and Echinostoma bolschewense (Digenea: Echinostomatidae) in Dreissena polymorpha (Bivalvia: Dreissenidae) from the Don and Volga river basins, Russia
Figure 3. Maximum likelihood phylogeny of Echinostoma genus based on the mitochondrial dataset (COI gene fragment). Numbers near nodes are bootstrap support (BS) values of IQ-TREE. Scale bar indicates the branch lengths. Red color indicates our sequence from the Sokolovskoe Reservoir (Don River basin) and Volga River.
Figure 7 in First record of metacercariae trematodes Opisthioglyphe ranae (Digenea: Telorchiidae) and Echinostoma bolschewense (Digenea: Echinostomatidae) in Dreissena polymorpha (Bivalvia: Dreissenidae) from the Don and Volga river basins, Russia
Figure 7. Encysted metacercariae of Opisthioglyphe ranae detected in Dreissena polymorpha from Seversky Donets River (Don River Basin, Russia) (A) Metacercarial cysts in the visceral mass of zebra mussel. (B) Encysted metacercaria.
Figure 1 in First record of metacercariae trematodes Opisthioglyphe ranae (Digenea: Telorchiidae) and Echinostoma bolschewense (Digenea: Echinostomatidae) in Dreissena polymorpha (Bivalvia: Dreissenidae) from the Don and Volga river basins, Russia
Figure 1. Map of study area. (A) Discovery of the Dreissena polymorpha in Volga and Don rivers basin, Russia: 1. Sokolovskoe reservoir (Don River basin), 2. Volga River, 3. Seversky Donets River (Don River basin); (B) View of the habitat of D. polymorpha (a) Sokolovskoe reservoir (photo by A. Tomilova), (C) Seversky Donets River (photo by A. Lyubas).
Figure 6 in First record of metacercariae trematodes Opisthioglyphe ranae (Digenea: Telorchiidae) and Echinostoma bolschewense (Digenea: Echinostomatidae) in Dreissena polymorpha (Bivalvia: Dreissenidae) from the Don and Volga river basins, Russia
Figure 6. Encysted metacercariae of Echinostoma bolschewense detected in Dreissena polymorpha from Volga and Don River basin, Russia (A) Metacercarial cysts in the gonad of zebra mussel. (B) Encysted metacercaria.
Figure 4 in First record of metacercariae trematodes Opisthioglyphe ranae (Digenea: Telorchiidae) and Echinostoma bolschewense (Digenea: Echinostomatidae) in Dreissena polymorpha (Bivalvia: Dreissenidae) from the Don and Volga river basins, Russia
Figure 4. Maximum likelihood phylogeny of Opisthioglyphe ranae based on the nuclear dataset (28S rDNA gene fragment). Numbers near nodes are bootstrap support (BS) values of IQ-TREE. Scale bar indicates the branch lengths. Red color indicates our sequence from the Seversky Donets River.
Figure 5 in First record of metacercariae trematodes Opisthioglyphe ranae (Digenea: Telorchiidae) and Echinostoma bolschewense (Digenea: Echinostomatidae) in Dreissena polymorpha (Bivalvia: Dreissenidae) from the Don and Volga river basins, Russia
Figure 5. Maximum likelihood phylogeny of Opisthioglyphe ranae based on the mitochondrial dataset (COI gene fragment). Numbers near nodes are bootstrap support (BS) values of IQ-TREE. Scale bar indicates the branch lengths. Red color indicates our sequence from the Seversky Donets River.
Fig. 7 in Towards a ground pattern reconstruction of bivalve nervous systems: neurogenesis in the zebra mussel Dreissena polymorpha
Fig. 7 Suggested ground patterns based on available data for numbers of serotonin-lir apical flask-shaped cells within bivalve apical organs. For further assessment, data on crucial clades, in particular Palaeoheterodonta and Protobranchia, are vital. Phylogeny of major bivalve lineages based on González et al. (2015). Red flask-shaped cells represent the cell count of respective serotonin-lir cells in the apical organ of studied species. Blue cells represent the hypothetical ground pattern. Within Heterodonta, Spisula solidissima shows three flask-shaped cells, while Dreissena
Fig. 6 in Towards a ground pattern reconstruction of bivalve nervous systems: neurogenesis in the zebra mussel Dreissena polymorpha
Fig. 6 Components of the serotonin-lir nervous system in the late veliger larva of Dreissena polymorpha. Serotonin-lir (bright yellow to dark red), acetylated α-tubulin-lir (green), and cell nuclei counter staining (blue). All images are in lateral view and apical is always up. Scale bars are 15 μm. a One flask-shaped serotonin-lir cell (red asterisk) remains of the apical organ and a neurite (n) projects dorsally into the velum (ve). The anlage of the future cerebral ganglion consists of six round, nonflask-shaped cells (turquoise x). (an) anus, (mo) mouth opening, (st) stomach. b Detail of a. Paired cerebro-visceral connectives (cvc) project
Fig. 2 in Towards a ground pattern reconstruction of bivalve nervous systems: neurogenesis in the zebra mussel Dreissena polymorpha
Fig. 2 Development of the serotonin-lir nervous system in Dreissena polymorpha from trochophore to early veliger stage. Serotonin-lir (bright-yellow to dark-red), acetylated α-tubulin-lir (green), and cell nuclei counter staining (blue). All images are in lateral view and apical is always up. Scale bars are 15 μm. a Trochophore larva (23 hpf). First serotonin-lir flask-shaped cell (red asterisk) at the apical pole. (at) apical tuft, (pt) prototroch, (tt) telotroch. b Early veliger larva (39 hpf). Two flask-shaped serotonin-lir cells (red asterisks) in the apical organ underlying the velum (ve). Postero-ventrally, the posterior larval sensory organ (pso) develops. Faintly labeled paired cerebro-visceral connectives (cvc) connect the posterior larval sensory organ (pso) to the
Fig. 5 in Towards a ground pattern reconstruction of bivalve nervous systems: neurogenesis in the zebra mussel Dreissena polymorpha
Fig. 5 Development of the serotonin-lir nervous system in Dreissena polymorpha from mid- to late veliger stage. Serotonin-lir (bright yellow to dark red), acetylated α-tubulin-lir (green), and cell nuclei counter staining (blue). b, c Details of a. f Detail of e. All images are in lateral view and apical is always up. Scale bars are 15 μm. a Mid-veliger larva (114 hpf). One remaining flask-shaped cell of the larval apical organ (red asterisk) underlain by the anlage of the cerebral ganglion which contains five roundish non-flask-shaped cells (turquoise x). Paired cerebrovisceral connectives (cvc) project from the anlage of the cerebral ganglion to the posterior larval sensor organ (pso). (an) anus, (mo) mouth opening, (tt) telotroch b Detail of the remaining flask-shaped cell
Fig. 4 in Towards a ground pattern reconstruction of bivalve nervous systems: neurogenesis in the zebra mussel Dreissena polymorpha
Fig. 4 Components of the serotonin-lir nervous system in the mid-veliger stage of Dreissena polymorpha. Serotonin-lir (bright yellow to dark red), acetylated α-tubulin-lir (green), and cell nuclei counter staining (blue). c, d, e Details of a. All images are in lateral view and apical is always up. Scale bars are 15 μm. a Overview of major neural components including four flask-shaped serotonin-lir cells (red asterisks) that form the apical organ. Neurites (n) project dorsally into the velum (ve). The anlage of the cerebral ganglion (turquoise x) is located underneath the apical organ. Cerebro-visceral connectives (cvc) connect the posterior larval sensory organ (pso) with the apical organ (ao). b Same individual as in a but colorcoded for depth. c Detail of the apical organ (red asterisks) and the anlage
The zebra mussel (Dreissena polymorpha) as a model organism for ecotoxicological studies: a prior 1H NMR spectrum interpretation of a whole body extract for metabolism monitoring.
<p>NMR data of the zebra mussel <em>Dreissena polymorpha</em> whole body polar extract metabolome</p> <p>- 1D <sup>1</sup>H annotated spectrum - 600 MHz</p> <p>- 2D <sup>1</sup>H-<sup>1</sup>H JRES spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>1</sup>H COSY spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>1</sup>H TOCSY spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>13</sup>C HSQC spectrum - 600 MHz</p> <p>- 2D<sup>1</sup>H-<sup>13</sup>C HSQC spectrum - 800 MHz</p> <p>- 2D<sup>1</sup>H-<sup>31</sup>P HSQC spectrum - 800 MHz</p> <p>- <sup>1</sup>H annotated spectrum description tables (.xlsx)</p> <p>- Instructions for data visualization in Topspin</p>
Data from: Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis
Dreissenid mussels (including the zebra mussel Dreissena polymorpha and the quagga mussel D. rostriformis) are among the world's most notorious invasive species, with large and widespread ecological and economic effects. However, their long‐term population dynamics are poorly known, even though these dynamics are critical to determining impacts and effective management. We gathered and analyzed 67 long‐term (>10 yr) data sets on dreissenid populations from lakes and rivers across Europe and North America. We addressed five questions: (1) How do Dreissena populations change through time? (2) Specifically, do Dreissena populations decline substantially after an initial outbreak phase? (3) Do different measures of population performance (biomass or density of settled animals, veliger density, recruitment of young) follow the same patterns through time? (4) How do the numbers or biomass of zebra mussels or of both species combined change after the quagga mussel arrives? (5) How does body size change over time? We also considered whether current data on long‐term dynamics of Dreissena populations are adequate for science and management. Individual Dreissena populations showed a wide range of temporal dynamics, but we could detect only two general patterns that applied across many populations: (1) Populations of both species increased rapidly in the first 1–2 yr after appearance, and (2) quagga mussels appeared later than zebra mussels and usually quickly caused large declines in zebra mussel populations. We found little evidence that combined Dreissena populations declined over the long term. Different measures of population performance were not congruent; the temporal dynamics of one life stage or population attribute cannot generally be accurately inferred from the dynamics of another. We found no consistent patterns in the long‐term dynamics of body size. The long‐term dynamics of Dreissena populations probably are driven by the ecological characteristics (e.g., predation, nutrient inputs, water temperature) and their temporal changes at individual sites rather than following a generalized time course that applies across many sites. Existing long‐term data sets on dreissenid populations, although clearly valuable, are inadequate to meet research and management needs. Data sets could be improved by standardizing sampling designs and methods, routinely collecting more variables, and increasing support.
Mejillón cebra (Dreissena polymorpha)
**Ejemplar**: *Dreissena polymorpha* **Nombre común**: Mejillón cebra, zebra mussel, musclo zebrat **Descripción**: Molusco bivalvo de tamaño inferior a 3 cm. Concha triangular con borde romo, dibujo irregular de bandas blancas y oscuras. Se fija al sustrato formando extensos racimos. Frecuente en aguas estancadas. Alta tolerancia a variaciones en salinidad. Especie invasora, originaria de mares Negro y Caspio. Su principal vector de introducción es la navegación **Localidad** pantano de Buseo (Valencia). Donación de V. Javier García Gimeno **Sigla museo, colección y entidad**: MUVHNZM0000. Colección 3 especies invasoras en España MUVHN **Técnica digitalización / modelo**: fotogrametría, Pentax K-1 Mark II. **Software**: Metashape **Registro fotográfico**: Natalia Conejero-Ortega. **Procesado fotogramétrico**: J.A. Villena **Cita ejemplar**: Colección 3D de especies invasoras en España. MUVHN.  Ejemplares en posición de vida sobre rama. Source: Objaverse 1.0 / Sketchfab
Fig. 4 in The Study Of Age-Related Variability Of Pigmentation Patterns Of The Shells Of Dreissena Polymorpha (Bivalvia, Dreissenidae) From Different Parts Of It'S Range
Fig. 4. Frequences of main pattern types at different age zones on zebra mussel shells.
Invasive zebra mussel (Dreissena polymorpha) threatens an exceptionally large population of the depressed river mussel (Pseudanodonta complanata) in a postglacial lake
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Data from: Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis
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Does lake eutrophication support biological invasions in rivers? A study on Dreissena polymorpha (Bivalvia) in lake-river ecotones
<p>The zebra mussel (Dreissena polymorpha) has all traits required to effectively colonize the aquatic environment and consequently reduce the diversity of native bivalves We hypothesized that the zebra mussel chooses lake outlets characterized by medium current velocity and good food conditions. Here, we analyzed differences between bivalve abundances in lake outlets with varying environmental conditions such as the Carlson Index (trophy status), depth, width, current velocity, bed vegetation coverage, and type of bottom substrate. The results showed that the zebra mussel inhabits outlets that provide food (high trophy outlets) and have a mineral bed and a medium current velocity (ca. 0.2–0.3 m s-1). The following main factors seem to be favorable for colonizing such outlets: (1) easy access to high amounts of food due to the increased density of the suspension drifting from the lake and (2) easy transport of the zebra mussel larvae from the lake to the downstream. The zebra mussel larvae drifting with the current may colonize the downstream. An increase in lake trophy may indirectly cause an increase in biological invasions in rivers.</p>
Figure 2 in Characteristics of zebra mussel (Dreissena polymorpha) populations in infested reservoirs, northwest Bulgaria
Figure 2. Principal component analysis (PCA) correlation biplot of the environmental variables. m – Ogosta reservoir sites; & – Rabisha reservoir sites.
Figure 3 in Characteristics of zebra mussel (Dreissena polymorpha) populations in infested reservoirs, northwest Bulgaria
Figure 3. Absolute abundance (ind./m2) and total biomass (g/m2) of zebra mussels at different sampling sites in the Ogosta and Rabisha reservoirs in April 2006.
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