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36 results for “Cyrenidae”
РИС. 3. Графики Зависимости: А – Ширины (D) и В – фронтальной кривиЗны (D/L) раковины Corbicula fluminea от длины (L). В качестве Зависимых переменных (y) в формулах укаЗаны Ширина (D) и фронтальнаЯ кривиЗна раковины (D/L). FIG. 3. Graphs of correlations between (A) width (D), (B) frontal curvature (H/L) and the shell length (L) of Corbicula fluminea. The formulas include shell width (D) and frontal curvature (D/L) as dependent variables (y). in Особенности аллометрического роста двустворчатого моллюска-вселенца Corbicula fluminea (Bivalvia: Cyrenidae) иЗ бассейна реки Дон
РИС. 3. Графики Зависимости: А – Ширины (D) и В – фронтальной кривиЗны (D/L) раковины Corbicula fluminea от длины (L). В качестве Зависимых переменных (y) в формулах укаЗаны Ширина (D) и фронтальнаЯ кривиЗна раковины (D/L). FIG. 3. Graphs of correlations between (A) width (D), (B) frontal curvature (H/L) and the shell length (L) of Corbicula fluminea. The formulas include shell width (D) and frontal curvature (D/L) as dependent variables (y).
FIG. 2 in Особенности аллометрического роста двустворчатого моллюска-вселенца Corbicula fluminea (Bivalvia: Cyrenidae) иЗ бассейна реки Дон
FIG. 2. Graphs of correlations between (A) height (H), (B) sagittal curvature (H/L) and the shell length (L) of Corbicula fluminea. The height (H) and sagittal curvature of the shell (H/L) are given as dependent variables (y) in the formulas.
FIG. 1 in Особенности аллометрического роста двустворчатого моллюска-вселенца Corbicula fluminea (Bivalvia: Cyrenidae) иЗ бассейна реки Дон
FIG. 1. Schematic map of the sampling area in the warm channel of Novocherkasskaya hydroelectric power plant, August 2019.
Figure 2 in Cytogenetic characteristics of invasive Corbicula fluminalis (Bivalvia: Cyrenidae) of the Northern Dvina River basin
Figure 2. The metaphase plate of C. fluminalis from canal of the Arkhangelsk Thermal Power Plant, Northern Dvina River Basin, Russia. (scale bar = 10 μm).
Figure 1 in Cytogenetic characteristics of invasive Corbicula fluminalis (Bivalvia: Cyrenidae) of the Northern Dvina River basin
Figure 1. The shells morphology of C. fluminalis from canal of the Arkhangelsk Thermal Power Plant, Northern Dvina River Basin, Russia. (A) Right valve, (B) Left valve. (scale bar = 1 cm).
Figure 3 in Cytogenetic characteristics of invasive Corbicula fluminalis (Bivalvia: Cyrenidae) of the Northern Dvina River basin
Figure 3. The metaphase chromosomes of C. fluminalis.
Data from: Phylogenomic analyses confirm a novel invasive North American Corbicula (Bivalvia: Cyrenidae) lineage
The genus Corbicula consists of estuarine or freshwater clams native to temperate/tropical regions of Asia, Africa, and Australia that collectively encompass both sexual species and clonal (androgenetic) lineages. The latter have become globally invasive in freshwater systems and they represent some of the most successful aquatic invasive lineages. Previous studies have documented four invasive clonal lineages, Forms A, B, C, and Rlc, with varying known distributions. Form A (R in Europe) occurs globally, Form B is found solely in North America, mainly the western United States, Form C (S in Europe) occurs both in European watersheds and in South America, and Rlc is known from Europe. A putative fifth invasive morph, Form D, was recently described in the New World from the Illinois River (Great Lakes watershed), where it occurs in sympatry with Forms A and B. An initial study showed Form D to be conchologically distinct: possessing rust-colored rays and white nacre with purple teeth. However, its genetic distinctiveness using standard molecular markers (mitochondrial cytochrome c oxidase subunit I and nuclear ribosomal 28S RNA) was ambiguous. To resolve this issue, we performed a phylogenomic analysis using 1,699-30,027 nuclear genomic loci collected via the next generation double digested restriction-site associated DNA sequencing method. Our results confirmed Form D to be a distinct invasive New World lineage with a population genomic profile consistent with clonality. A majority (7/9) of the phylogenomic analyses recovered the four New World invasive Corbicula lineages (Forms A, B, C, and D) as members of a clonal clade, sister to the non-clonal Lake Biwa (Japan) endemic, C. sandai. The age of the clonal clade was estimated at 1.49 million years (my; ± 0.401– 2.955 my) whereas the estimated ages of the four invasive lineage crown clades ranged from 0.27-0.44 my. We recovered no evidence of nuclear genomic admixture among the four invasive lineages in our study populations. In contrast, 2/6 C. sandai individuals displayed partial nuclear genomic Structure assignments with multiple invasive clonal lineages. These results provide new insights into the origin and maintenance of clonality in this complex system.
FIGURA 4 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 4. Hábitats donde se localizaron los ejemplares de CorbiculO sp.A: canal de riego de Camarles,con el fondo tapizado con material plástico,a su vez infestado de puestas de PomOceO mOculOtO; B: azud de Tivenys / Xerta;C: playa fluvial a escasos metros del azud;D-F: ejemplares vivos de CorbiculO sp.en fondo de arena y grava en el río Ebro.
FIGURA 2 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 2. Fotografía de ejemplares de CorbiculO sp.,en diferentes estadios de desarrollo.Escalas:A: 0,5 cm;B-I: 1 cm.
FIGURA 7 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 7. Representación gráfica del producto de altura y longitud máxima,frente a peso (mg) de las conchas,incluyendo ejemplares capturados en el río y en el canal. Se observa una notable diferencia en la pendiente de las rectas, que puede considerarse como proxy de la densidad de las conchas.Número de ejemplares analizados igual que en Fig.6. Azul:Corbicula sp.; naranja:C.producta; gris:C.fluminea. Graphical representation of the product of height and length respect of weight (mg) of the shells,including specimens captured at the canal and the river.A clear difference can be observed in the slope of the regression line,which can be considered as a proxy of shell density.Number of analyzed specimens as in Fig.6. Blue:Corbicula sp.; orange:C.producta; grey:C.fluminea.
FIGURA 6. A in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 6. A: Gráfica representando longitud máxima de la concha en milímetros (abscisas) frente a peso en gramos (ordenadas) de conchas de Corbicula sp., Corbicula producta y Corbicula fluminea (ejemplares procedentes del canal de Camarles y del río Ebro de diferentes campañas). B: Mismos valores convertidos en logaritmo decimal.Número de ejemplares analizados:Corbicula sp.: 327; Corbicula producta: 139;Corbicula fluminea: 151. Azul: Corbicula sp.;naranja:C.producta; gris:C.fluminea. A: Plot showing maximum length of the shell in millimeters (abscissae) against weight in grams (ordinates) of shells of Corbicula sp.,Corbicula producta and Corbicula fluminea (specimens form Camarles canal and Ebro River from different seasons).B: Same values transformed to decimal logarithms.Number of analyzed specimens:Corbicula sp.:327;Corbicula producta: 139;Corbicula fluminea: 151.Blue:Corbicula sp.; orange:C.producta; grey:C.fluminea.
FIGURA 4 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 4. Hábitats donde se localizaron los ejemplares de Corbicula sp.A: canal de riego de Camarles,con el fondo tapizado con material plástico,a su vez infestado de puestas de Pomacea maculata; B: azud de Tivenys / Xerta;C: playa fluvial a escasos metros del azud;D-F: ejemplares vivos de Corbicula sp.en fondo de arena y grava en el río Ebro. Habitats where Corbicula sp. specimens were located. A: Camarles irrigation canal, with its bottom covered with plastic material, which is infested by Pomacea maculata eggs; B: Tivenys / Xerta weir; C: fluvial beach located close to the weir; D-F: live specimens of Corbicula sp.in sand and gravel bottom in the Ebro River.
FIGURA 5 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 5. Gráfica representando longitud máxima de la concha en milímetros (abscisas) frente a peso en gramos (ordenadas) de conchas de Corbicula del canal de Camarles capturadas en 2017.B:Mismos valores convertidos en logaritmo decimal.Número de ejemplares analizados:Corbicula sp.:104;Corbicula producta: 78.Azul:Corbicula sp;naranja:C.producta. Plot showing maximum length of the shell in millimeters (abscissae) against weight in grams (ordinates) of Corbicula shells from Camarles canal collected in 2017. B:Same values transformed to decimal logarithms.Number of analyzed specimens: Corbicula sp.: 104;Corbicula producta: 78. Blue:Corbicula sp.; orange:C. producta.
FIGURA 2 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 2. Fotografía de ejemplares de Corbicula sp.,en diferentes estadios de desarrollo.Escalas:A: 0,5 cm;B-I: 1 cm. Photographs of specimens of Corbicula sp., at different development stages.Scales:A: 0,5 cm;B-I: 1 cm.
FIGURA 3 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 3. Comparativa de ejemplares de Corbicula sp. con Corbicula producta, en diferentes estadios de desarrollo. A-B: ejemplares juveniles; C-D: ejemplares subadultos;E: visión superior de la zona del umbo; F: detalle del umbo.G: ejemplares adultos, con vista del exterior e interior de la concha. H: detalle de la dentición de las dos valvas.Escalas:A-B:0,5 cm;C-H:1 cm. Comparison of specimens of Corbicula sp.with Corbicula producta, at different development stages.A-B: juveniles;C-D: subadult specimens;E: upper view of the umbo area; F: detail of umbo.G: adult specimens with outer and inner view of the shell.H: detail of dentition in both valves.Scales:A-B:0,5 cm;C-H: 1 cm.
FIGURA 1 in Una nueva especie del género Corbicula (Bivalvia: Cyrenidae) presente en el bajo Ebro
FIGURA 1. Mapa de la península Ibérica donde se detallan los puntos de muestreo en el bajo Ebro (cuadrado ampliado). Map of the Iberian Peninsula with detail of the sampling points in the lower Ebro River (enlarged square).
FIGURA 4 in Rápida expansión de diversas especies del género Corbicula (Bivalvia: Cyrenidae) por el Ebro medio
FIGURA 4. Fotografía representativa de conchas de las tres especies consideradas en este estudio. A-E: Corbicula fluminea. A: Monzalbarba; B: Torres de Berrellén;C: Gallur;D: Zaragoza;E: Alcalá de Ebro.F-J: Corbicula fluminalis.F-H: Pina de Ebro; I: Mequinensa;J: Pina de Ebro.K-O: Corbicula insularis. K: Pina de Ebro;L: La Zaida;M: Mequinensa;N: Zaragoza;O: Monzalbarba.Escala:1cm. Representative photographs of shells of the three species considered in this study.A-E:Corbicula fluminea.A:Monzalbarba;B: Torres de Berrellén;C: Gallur; D: Zaragoza; E: Alcalá de Ebro.F-J: Corbicula fluminalis. F-H: Pina de Ebro; I: Mequinensa;J: Pina de Ebro.K-O: Corbicula insularis. K: Pina de Ebro; L: La Zaida;M: Mequinensa;N: Zaragoza;O: Monzalbarba.Scale bar:1 cm.
FIGURA 6 in Rápida expansión de diversas especies del género Corbicula (Bivalvia: Cyrenidae) por el Ebro medio
FIGURA 6. Resultados del proxy para la estimación de la densidad relativa de las conchas de los diferentes taxones (C. fluminea, C.fluminalis y C. insularis), que representa el producto de la longitud y altura máxima (abcisas) contra el peso (ordenadas). Se muestran los valores obtenidos para el coeficiente de correlación R2 y la pendiente de la recta de cada taxón.Se midieron 100 ejemplares de cada taxón. Results of the proxy used for estimations of relative density of the shells of the different taxa (C. fluminea, C. fluminalis and C. insularis), which represents the product of maximum shell length and height (abscises) against shell weight (ordinates).Values obtained for correlation coefficient (R2) and slope of the straight line for each taxon are also shown.A total of 100 specimens of each taxon were measured.
FIGURA 5 in Rápida expansión de diversas especies del género Corbicula (Bivalvia: Cyrenidae) por el Ebro medio
FIGURA 5. Contajes obtenidos en las localidades de A: presa de Pina de Ebro y B: azud de la Zaida. Counting obtained in the localities of A: Pina de Ebro weir and B: La Zaida weir.
FIGURA 3 in Rápida expansión de diversas especies del género Corbicula (Bivalvia: Cyrenidae) por el Ebro medio
FIGURA 3. Ejemplares vivos capturados de las tres especies del estudio. A-B: Corbicula fluminea A: Monzalbarba y B: Torres de Berrellén. C-D: Corbicula insularis C: de Pina de Ebro y D: Monzalbarba.E-G: Corbicula fluminalis de Pina de Ebro.H: Muestreo representativo con presencia de ejemplares de las tres especies en Pina de Ebro. Live specimens captured of the three species in the study.A-B: Corbicula fluminea A: from Monzalbarba and B: Torres de Berrellén.C-D: Corbicula insularis C: from Monzalbarba and D: Pina de Ebro. E-G: Corbicula fluminalis from Pina de Ebro. H: Representative sampling with presence of the three species at Pina de Ebro.
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