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24 results for “Shell Lake”
РИС. 1. Раковины Digyrcidum и Bithynia иЗ водоемов Тюменской области: A. Digyrcidum bourguignati иЗ оЗ. Кривое, 30.07.2015. B. D. starobogatovi иЗ устьЯ р. Вагай, 06.07.2012. C. Bithynia curta иЗ оЗ. Каракундус, 09.07.2012. D. B. tentaculata иЗ старицы р. ИртыШ, 02.07.2005. E. B. decipiens иЗ оЗ. АрбаШ, 07.07.2012. F. B. producta иЗ р. Ирюм, 15.06.2012. МасШтаб: 1 мм. Фото Н.И. Андреева FIG. 1. Shells of Digyrcidum and Bithynia species of the Tyumen Region waterbodies. A. Digyrcidum bourguignati, Krivoye Lake, 30.07.2015.B. D. starobogatovi, the Vagai River mouth, 06.07.2012. C. Bithynia curta, Karakundus Lake, 09.07.2012. D. B. tentaculata, an oxbow of the Irtysh River, 02.07.2005. E. B. decipiens, Arbash Lake, 07.07.2012. F. B. producta, Iryum River, 15.06.2012. Scale bars: 1 mm. Photos: N.I. Andreyev. in Моллюски семейства Bithyniidae (Mollusca, Gastropoda) Тюменской области
РИС. 1. Раковины Digyrcidum и Bithynia иЗ водоемов Тюменской области: A. Digyrcidum bourguignati иЗ оЗ. Кривое, 30.07.2015. B. D. starobogatovi иЗ устьЯ р. Вагай, 06.07.2012. C. Bithynia curta иЗ оЗ. Каракундус, 09.07.2012. D. B. tentaculata иЗ старицы р. ИртыШ, 02.07.2005. E. B. decipiens иЗ оЗ. АрбаШ, 07.07.2012. F. B. producta иЗ р. Ирюм, 15.06.2012. МасШтаб: 1 мм. Фото Н.И. Андреева FIG. 1. Shells of Digyrcidum and Bithynia species of the Tyumen Region waterbodies. A. Digyrcidum bourguignati, Krivoye Lake, 30.07.2015.B. D. starobogatovi, the Vagai River mouth, 06.07.2012. C. Bithynia curta, Karakundus Lake, 09.07.2012. D. B. tentaculata, an oxbow of the Irtysh River, 02.07.2005. E. B. decipiens, Arbash Lake, 07.07.2012. F. B. producta, Iryum River, 15.06.2012. Scale bars: 1 mm. Photos: N.I. Andreyev.
РИС. 2. Раковины Opisthorchophorus, Paraelona и Boreoelona иЗ водоемов Тюменской области: A. Opisthorchophorus troscheli иЗ оЗ. Кривое, 30.07.2015. B. O. abacumovae иЗ р. Ирюм, 25.08.2015. C. O. baudonianus иЗ р. Ирюм, 02.07.2015. D. Paraelona socialis иЗ р. Ирюм, 02.07.2015. E. Paraelona milachevitchi иЗ р. Ирюм, 02.07.2015. F. Boreoelona sp. иЗ беЗымЯнного оЗера в пойме р. БольШой Балык, 02.06.2019. G. B. contortrix иЗ беЗымЯнного оЗера в пойме р. БольШой Балык, 02.06.2019. H. B. sibirica иЗ беЗымЯнного оЗера в пойме р. БольШой Балык, 02.06.2019. МасШтаб: 1 мм. Фото Н.И. Андреева. FIG. 2. Shells of Opisthorchophorus, Paraelona and Boreoelona species of the Tyumen Region waterbodies. A. Opisthorchophorus troscheli, Krivoye Lake, 30.07.2015. B. O. abacumovae, Iryum River, 25.08.2015. C. O. baudonianus, Iryum River, 02.07.2015. D. Paraelona socialis иЗ р. Ирюм 02.07.2015. E. Paraelona milachevitchi, Iryum River, 02.07.2015. F. Boreoe - lona sp., an unnamed lake in the Bolshoy Balyk River floodplain 02.06.2019, G. B. contortrix, Iryum River, 15.07.2012. H. B. sibirica, an unnamed lake in the Bolshoy Balyk River floodplain, 02.06.2019. Scale bars: 1 mm. Photos: N.I. Andreyev. in Моллюски семейства Bithyniidae (Mollusca, Gastropoda) Тюменской области
РИС. 2. Раковины Opisthorchophorus, Paraelona и Boreoelona иЗ водоемов Тюменской области: A. Opisthorchophorus troscheli иЗ оЗ. Кривое, 30.07.2015. B. O. abacumovae иЗ р. Ирюм, 25.08.2015. C. O. baudonianus иЗ р. Ирюм, 02.07.2015. D. Paraelona socialis иЗ р. Ирюм, 02.07.2015. E. Paraelona milachevitchi иЗ р. Ирюм, 02.07.2015. F. Boreoelona sp. иЗ беЗымЯнного оЗера в пойме р. БольШой Балык, 02.06.2019. G. B. contortrix иЗ беЗымЯнного оЗера в пойме р. БольШой Балык, 02.06.2019. H. B. sibirica иЗ беЗымЯнного оЗера в пойме р. БольШой Балык, 02.06.2019. МасШтаб: 1 мм. Фото Н.И. Андреева. FIG. 2. Shells of Opisthorchophorus, Paraelona and Boreoelona species of the Tyumen Region waterbodies. A. Opisthorchophorus troscheli, Krivoye Lake, 30.07.2015. B. O. abacumovae, Iryum River, 25.08.2015. C. O. baudonianus, Iryum River, 02.07.2015. D. Paraelona socialis иЗ р. Ирюм 02.07.2015. E. Paraelona milachevitchi, Iryum River, 02.07.2015. F. Boreoe - lona sp., an unnamed lake in the Bolshoy Balyk River floodplain 02.06.2019, G. B. contortrix, Iryum River, 15.07.2012. H. B. sibirica, an unnamed lake in the Bolshoy Balyk River floodplain, 02.06.2019. Scale bars: 1 mm. Photos: N.I. Andreyev.
Рис. 1. Раковины беЗЗубок: А – Beringiana chereshnevi (оЗ. АЗабачье, Камчатка); В – Kunashiria japonica (оЗ. Утиное, о-в Зеленый); С – Kunashiria haconensis (оЗ. Лагунное, о-в КунаШир). МасШтаб 5 см. Fig. 1. Shells of anodontins: А – Beringiana chereshnevi, Azabachie Lake, Kamchatka; В – Kunashiria japonica, Utinoye Lake, Zelionyi Is.; С – Kunashiria haconensis, Lagunnoye Lake, Kunashir Is. Scale bar 5 cm. in Beringiana and Kunashiria (Bivalvia: Unionidae: Anodontinae)
Рис. 1. Раковины беЗЗубок: А – Beringiana chereshnevi (оЗ. АЗабачье, Камчатка); В – Kunashiria japonica (оЗ. Утиное, о-в Зеленый); С – Kunashiria haconensis (оЗ. Лагунное, о-в КунаШир). МасШтаб 5 см. Fig. 1. Shells of anodontins: А – Beringiana chereshnevi, Azabachie Lake, Kamchatka; В – Kunashiria japonica, Utinoye Lake, Zelionyi Is.; С – Kunashiria haconensis, Lagunnoye Lake, Kunashir Is. Scale bar 5 cm.
РИС. 8. Примеры проблем с иЗображением при работе на СЭМ. А, В. Засветка раЗличных частей раковин глохидиев (А. Anodonta anatina (=Colletopterum), оЗ. Красное, ХакасиЯ. В. Inversiunio reinianus, оЗ. Бива, о-в Хонсю, ЯпониЯ). C. РаЗнаЯ скорость сканированиЯ (слева – очень быстраЯ, справа – медленнаЯ) наружной поверхности глохидиЯ (Anodonta cygnea, р. Ялма, МосковскаЯ обл.). D. Артефакты в виде гориЗонтальных полос вследствие накоплениЯ отрицательного ЗарЯда при недостаточном напылении внутренней поверхности глохидиЯ (Nodularia douglasiae, ПетровскаЯ протока, бассейн р. Амур, Хабаровский кр.). МасШтаб 50 мкм (А, В), 2 мкм (С), 5 мкм (D). Микроскопы Zeiss EVO 40 (А, С, D), Zeiss MERLIN (В), напыление углеродом (А, С), хромом (В, D). FIG. 8. Illustration of different problems with SEM images. A, B. Overall illumination of some glochidia shells parts (A. Anodonta anatina (= Colletopterum), Krasnoe Lake, Khakassia. B. Inversiunio reinianus, Biwa Lake, Honshu Island, Japan). C. Different scanning speed (faster on the left and slower on the right) of the exterior glochidia valve (Anodonta cygnea, Yalma River, Moscow Oblast). D. Artifacts as horizontal stripes because of additional accumulation of a negative charge due to insufficient coating of the interior glochidia valve (Nodularia douglasiae, Petrovskaya channel, Amur River basin, Khabarovsk Krai). Scale bars 50 μm (A, B), 2 μm (C), 5 μm (D). Zeiss EVO 40 (A, C, D) and Zeiss MERLIN (B) microscopes, sputter coating with carbon (A, C) and chromium (B, D). in Методика подготовки раковин глохидиев (Bivalvia, Unionidae) длЯ работы на сканируюЩем Электронном микроскопе
РИС. 8. Примеры проблем с иЗображением при работе на СЭМ. А, В. Засветка раЗличных частей раковин глохидиев (А. Anodonta anatina (=Colletopterum), оЗ. Красное, ХакасиЯ. В. Inversiunio reinianus, оЗ. Бива, о-в Хонсю, ЯпониЯ). C. РаЗнаЯ скорость сканированиЯ (слева – очень быстраЯ, справа – медленнаЯ) наружной поверхности глохидиЯ (Anodonta cygnea, р. Ялма, МосковскаЯ обл.). D. Артефакты в виде гориЗонтальных полос вследствие накоплениЯ отрицательного ЗарЯда при недостаточном напылении внутренней поверхности глохидиЯ (Nodularia douglasiae, ПетровскаЯ протока, бассейн р. Амур, Хабаровский кр.). МасШтаб 50 мкм (А, В), 2 мкм (С), 5 мкм (D). Микроскопы Zeiss EVO 40 (А, С, D), Zeiss MERLIN (В), напыление углеродом (А, С), хромом (В, D). FIG. 8. Illustration of different problems with SEM images. A, B. Overall illumination of some glochidia shells parts (A. Anodonta anatina (= Colletopterum), Krasnoe Lake, Khakassia. B. Inversiunio reinianus, Biwa Lake, Honshu Island, Japan). C. Different scanning speed (faster on the left and slower on the right) of the exterior glochidia valve (Anodonta cygnea, Yalma River, Moscow Oblast). D. Artifacts as horizontal stripes because of additional accumulation of a negative charge due to insufficient coating of the interior glochidia valve (Nodularia douglasiae, Petrovskaya channel, Amur River basin, Khabarovsk Krai). Scale bars 50 μm (A, B), 2 μm (C), 5 μm (D). Zeiss EVO 40 (A, C, D) and Zeiss MERLIN (B) microscopes, sputter coating with carbon (A, C) and chromium (B, D).
Figure 6 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 6. Plots of length against PC1 for all eight species of Lavigeria studied with regressed lines and R2 values. Length values are log transformed.
Figure 3 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 3. Character state APPL. An adult specimen of L. n. sp. X (left) and a juvenile (right). Notice the perimetric, wrinkle-like, lines on the front surface of the apertural lip of the adult. Scale bar = 0.2 cm.
Figure 7 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 7. Fifty per cent majority-rule consensus trees of five, nine, ten and 31 trees (from top to bottom, respectively) from four matrices. Matrices are coding the data of Table 1. See Analysis for explanation of the matrices. Tree and character statistics are given in Table 3. Optimality criterion: maximum parsimony, exhaustive search. All characters binary, of equal weight and unordered. Numbers indicate percentage of topologies that include the respective branches.
Figure 5 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 5. Character states DFST, AXRB and UEPW. Adult specimens of (A) L. n. sp. W, (B) L. n. sp. F, (C) L. n. sp. K, (D) L. n. sp. J showing the aperture in side view and (E) an apertural view of an adult L. n. sp. W. In A-D the trajectory of the suture tends to deviate downwards in comparison to the trajectory of the spiral cord of the previous whorl immediately above the suture (DFST). A and D also show the loss of, or irregularities in the appearance of axial sculpture (AXRB). In E, arrowheads show the undulations formed at the edge of the parietal side of the aperture (UEPW). Scale bar = 0.2 cm.
Figure 2 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 2. Character states WGPW and APLT. An adult specimen of L. n. sp. A (left) and a juvenile (right). The adult shows a thickened (APLT) and opaque (WGPW) inner surface of the apertural lip in comparison to the juvenile. Scale bar = 0.2 cm.
Figure 1 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 1. Eight species used in this study, apertural and side views of adult specimens. (A) Lavigeria new species N. (B) L. n. sp. F. (C) L. n. sp. J. (D) L. n. sp. X. (E) L. n. sp. K. (F) L. n. sp. W. (G) L. n. sp. A. (H) L. n. sp. U. C-H all belong to the same clade. A and B belong to different clades within the genus. Scale bar = 0.2 cm.
Figure 4 in Adulthood and phylogenetic analysis in gastropods: character recognition and coding in shells of Lavigeria (Cerithioidea, Thiaridae) from Lake Tanganyika
Figure 4. Character state APDT. An adult specimen of L. n. sp. J (left) and a juvenile on the right. Notice in the adult how the parietal side of the apertural lip is completely detached from the previous whorl and a false umbilicus has developed. Scale bar = 0.2 cm.
Fig. 2 in Shell size and population density of Cerastoderma glaucum Poiret 1789 (Mollusca: Bivalvia) in "Pomorie Lake" (Black Sea coast, Bulgaria)
Fig. 2. Population density of Cerastoderma glaucum per 1 m2 of each size group during seasons.
Fig. 1 in Shell size and population density of Cerastoderma glaucum Poiret 1789 (Mollusca: Bivalvia) in "Pomorie Lake" (Black Sea coast, Bulgaria)
Fig. 1. Map of the studied area (the location of the sampling sites is indicated with numbers).
FIGURE 8 in Descriptions of two new shell-dwelling species of Metriaclima (Cichlidae) from Lake Malaŵi, Africa
FIGURE 8. Sheared second principal components (morphometric data) plotted against the first principal components (meristic data) of 14 specimens of Metriaclima ngarae from Ngara (x) and 20 specimens of Metriaclima gallireyae from Gallireya Reef (+).
FIGURE 3 in Descriptions of two new shell-dwelling species of Metriaclima (Cichlidae) from Lake Malaŵi, Africa
FIGURE 3. CT scan of the cranium of Metriaclima ngarae Holotype, PSU 13365, adult male, 59.1 mm SL, Ngara, Lake Malaŵi; angle of ethmovomerine block is 46.4° with parasphenoid.
Data from: Can fractal dimensions objectivize gastropod shell morphometrics? A case study from Lake Lugu (SW China)
<p>Morphometrics are fundamental for statistical analyses of fossils, particularly because soft parts or DNA are rarely preserved and thus hard parts such as shells are commonly the only source of information. Geometric morphometrics i.e. landmark analysis has been successfully established but exhibits a couple of shortcomings. On the one hand landmarking is rather subjective and on the other hand the application at the level of micro-sculpture is difficult.</p> <p>With the aid of high-resolution 3D scanning technology and analyses of fractal dimensions, we test whether shortcomings of linear and geometric morphometrics can be overcome. As a model group, we selected a clade of modern viviparid gastropods from Lake Lugu, the shells of which show a high degree of sculptural variation. Linear and landmark analyses were applied to the same shells, in order to root the fractal dimensions. The genetic diversity of the gastropod clade was basically assessed.</p> <p>The genetic results suggest that the gastropod clade represents a single species. The results of all morphometric methods applied are in line with the genetic results, which is that no clustering of morpho-types occurs. Apart from this overall agreement, landmark and fractal dimension analyses do not correspond with each other but represent data sets with different information. Generally, the fractal dimension values quantify the roughness of the shell surface, the resolution of the 3D-scans determining the level. In our approach, we captured the micro-sculpture but not the first-order sculptural elements, which explains that fractal dimension and landmark data are not in phase.</p> <p>We can show that analyzing fractal dimensions of gastropod shells opens a window to more detailed information that can be considered in evolutionary and ecological contexts. We propose that using 3D-scans with a low resolution may successfully substitute landmark analyses because it overcomes the subjective landmarking. Analyses of 3D-scans with higher resolution than used in this study will provide surface roughness information at the mineralogical level. We suggest that fractal dimension analyses of a combination of differently resolved 3D-models will significantly improve the quality of shell morphometrics.</p>
Data from: Can fractal dimensions objectivize gastropod shell morphometrics? A case study from Lake Lugu (SW China)
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Shell Lake Water Level Data from 1983 to 2014 in Wisconsin
The lake level data of Shell Lake in Wisconsin. Shell Lake is monitored by USGS, Wisconsin Department of Natural Resources, and the Town of Shell Lake. These three entities share most of the same datum and most of the data. This dataset is a combination of the data from all three sources.
FIGURE 7. A in Descriptions of two new shell-dwelling species of Metriaclima (Cichlidae) from Lake Malaŵi, Africa
FIGURE 7. A male Metriaclima gallireyae at Gallireya Reef (10.500153 S, 34.233362 E), Lake Malaŵi.
FIGURE 4. A in Descriptions of two new shell-dwelling species of Metriaclima (Cichlidae) from Lake Malaŵi, Africa
FIGURE 4. A male Metriaclima ngarae at a submerged reef near Ngara (10.233397 S, 34.106592 E).
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