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28 results for “pond snail”
Fig. 3a-j in Physico-chemical characteristics of habitats colonized by the pond snail Radix labiata (Gastropoda, Basommatophora, Lymnaeidae): a model approach
Fig. 3a-j: Graphical presentation of essential parameters associated with logistic regression: white vertical line: position of the maximum probability of occurrence (xmax), black bar: optimum range of the given variable, grey-shaded area: range of the given variable that is still tolerated by the species; a) water temperature, b) pH, c) electric conductivity, d) oxygen content in the water, e) nitrate concentration in the water, f) water depth, g) biological oxygen demand within five days, h) content of ammonium nitrogen, i) geographic altitude, j) current velocity.
Fig. 1 in Physico-chemical characteristics of habitats colonized by the pond snail Radix labiata (Gastropoda, Basommatophora, Lymnaeidae): a model approach
Fig. 1: General habitus of the shell of R. labiata as well as the living animal: a) Front view of the shell (height: 1.4 cm, width: 0.75 cm), b) back view of the shell, c) living animal with its typical triangular tentacles.
Fig. 2a-j in Physico-chemical characteristics of habitats colonized by the pond snail Radix labiata (Gastropoda, Basommatophora, Lymnaeidae): a model approach
Fig. 2a-j: Results of the logistic regression procedure carried out for ten environmental variables: a) water temperature, b) pH, c) electric conductivity, d) oxygen content in the water, e) nitrate concentration in the water, f) water depth, g) biological oxygen demand within five days, h) content of ammonium nitrogen, i) geographic altitude, j) current velocity.
Year 1 Tanzanian ponds snail-parasite dynamics
<div> <div> <div> <div> <p>Different populations of hosts and parasites experience distinct seasonality in environmental factors, depending on local-scale biotic and abiotic factors. This can lead to highly heterogeneous disease outcomes across host ranges. Variable seasonality characterizes urogenital schistosomiasis, a neglected tropical disease caused by parasitic trematodes (<em>Schistosoma</em> <em>haematobium</em>). Their intermediate hosts are aquatic <em>Bulinus</em> snails that are highly adapted to extreme rainfall seasonality, undergoing prolonged dormancy yearly. While <em>Bulinus</em> snails have a remarkable capacity for rebounding following dormancy, we investigated the extent to which parasite survival within snails is diminished. We conducted an investigation of seasonal snail-schistosome dynamics in 109 ponds of variable ephemerality in Tanzania from August 2021 to July 2022. First, we found that ponds have two synchronized peaks of schistosome infection prevalence and observed cercariae, though of lower magnitude in the fully-desiccating than non-desiccating ponds. Second, we evaluated total yearly schistosome prevalence across an ephemerality gradient, finding ponds with intermediate ephemerality to have the highest infection rates. We also investigated dynamics of non-schistosome trematodes, which lacked synonymity with schistosome patterns. We found peak schistosome transmission risk at intermediate pond ephemerality, thus the impacts of anticipated increases in landscape desiccation could result in increases or decreases in transmission risk with global change.</p> </div> </div> </div> </div>
Figure 1 in New data on pond snails (Mollusca: Gastropoda: Lymnaeidae) inhabiting the Ukrainian Transcarpathian: diversity, distribution and ecology
Figure 1. Map showing the localities of samples studied. Details for each sampling point are given in Table 1.
Figure 2 in First molecularly substantiated records of the pond snail Ampullaceana fontinalis in the Siverskyi Donets River Basin, Ukraine (Gastropoda: Lymnaeidae)
Figure 2. Voucher of PS43 specimen, Ampullaceana fontinalis, from the Borova River, Luhansk region, Ukraine.
Figure 3 in First molecularly substantiated records of the pond snail Ampullaceana fontinalis in the Siverskyi Donets River Basin, Ukraine (Gastropoda: Lymnaeidae)
Figure 3. Phylogenetic relationships within the genus Ampullaceana obtained using the maximum likelihood optimality criterion based on COI sequences (Log-likelihood of the tree = -4245.7847). Values of both the SH-like approximate likelihood-ratio test (SH-aLRT) and ultrafast bootstrapping are shown for branches.
Year 1 Tanzanian ponds snail-parasite dynamics
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Figure 4 in First molecularly substantiated records of the pond snail Ampullaceana fontinalis in the Siverskyi Donets River Basin, Ukraine (Gastropoda: Lymnaeidae)
Figure 4. Phylogenetic relationships within the clade of Ampullaceana fontinalis (see Fig 3).
Figure 1 in First molecularly substantiated records of the pond snail Ampullaceana fontinalis in the Siverskyi Donets River Basin, Ukraine (Gastropoda: Lymnaeidae)
Figure 1. Habitat of Ampullaceana fontinalis in the Borova River, Luhansk region, Ukraine.
Nonnative fish facilitate nonnative snails and alter food web structure in experimental pond communities
<p>1. Contemporary ecosystems commonly support multiple nonnative species, which can alter community structure and interact with one another directly and indirectly. Novel interactions between invasive species can result in the facilitation or suppression of one or both invaders, making it important to understand the underlying mechanisms that affect invasion outcomes. </p> <p>2. Goldfish (<em>Carassius</em> <em>auratus</em>) and Chinese mystery snails (<em>Cipangopaludina</em> <em>chinensis</em>) are freshwater species that have been introduced widely through the aquarium trade and co-occur in their nonnative ranges. We used an outdoor mesocosm experiment to assess separate and combined effects of goldfish and mystery snails on pond community structure and to investigate whether goldfish and mystery snails affected one another positively, neutrally, or negatively. We predicted that the distinct trophic levels of each species and the anti-predator traits of mystery snails would lead to positive interactions between invaders and synergistic effects on the aquatic community. </p> <p>3. Goldfish directly increased turbidity and decreased floating filamentous algae, zooplankton, juvenile native snails, and survival of amphibians via consumptive effects. Goldfish indirectly increased attached periphyton, phytoplankton, and body size of surviving native green frogs (<em>Lithobates</em> <em>clamitans</em>) through trophic cascades and/or release from competition. Mystery snails had more subtle effects, including reducing growth rates of native gray tree frogs (<em>Hyla</em> <em>versicolor</em>), likely through competitive interactions. </p> <p>4. With goldfish present, mystery snails showed increased reproductive success (higher total biomass of juveniles), likely due to indirect competitive release from other herbivores. In contrast to their effects on native snails, goldfish did not consume juvenile mystery snails, likely due to their unique traits (e.g., large size and shell thickness). Mystery snails slightly reduced goldfish growth but did not affect their survival. </p> <p>5. These results suggest unidirectional facilitation between invaders via indirect changes in the food web. Overall, our study found strong direct and indirect effects of invasive aquarium species, particularly goldfish, and provides experimental support for the invasional meltdown hypothesis within urban waterbodies, which are especially prone to invasions.</p>
Nonnative fish facilitate nonnative snails and alter food web structure in experimental pond communities
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Figure 6 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 6. Shells of the three lymnaeid species described here as new to science. A, Galba pacifica, the holotype. B, G. pacifica, a paratype (ZIN no. 4/531-2021, a ditch near the Horokatomamu Stream). C, G. pacifica, a paratype (RMBH, no. MLym-1113/4, Naie Stream). D, Kamtschaticana nipponica, the holotype. E, K. nipponica, a paratype (RMBH, no. MLym-1115/3). F, K. nipponica, a paratype (RMBH, no. MLym-1115/1). G, Orientogalba hokkaidoensis, the holotype. H, O. hokkaidoensis, a paratype (Hikirichi Stream). I, O. hokkaidoensis, a paratype (RMBH, no. MLym-1114/2). Scale bars: 5 mm. Photographs: Maxim V. Vinarski (A, B, D, G, H) and Olga V. Aksenova (C, E, F, I).
Figure 2 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 2. Maximum likelihood consensus phylogeny of the Lymnaeidae (five partitions: three codons of COI + 16S rRNA + 28S rRNA). Black numbers near nodes are bootstrap support values. Non-target clades are collapsed. The names of taxa recorded in the Far East are red; those having trans-Beringian (Holarctic) ranges are blue; that of the species endemic to Alaska is green; and the names of alien species are purple. The outgroup taxa are omitted. Information on COI, 16S rRNA, and 28S rRNA sequences that were used to build the tree is given in the Supporting Information (Table S1).
Figure 1 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 1. Species richness and distribution of pond snails (Lymnaeidae) on the eastern margin of Asia and Alaska. A, regional zonation of East Asia and Alaska based on the distribution of Lymnaeidae. The numbers in white circles indicate the number of species in corresponding regions. B, scatter plot of principal component (PC) analysis based on the presence–absence dataset of pond snails (Lymnaeidae) throughout regions of East Asia and Beringia. Distribution areas: ALA, Alaska; AMU, Amur River basin and Primorye; CHU, Chukchi Peninsula; HON, Honshu; HOK, Hokkaido; ḎM, Kamchatka Peninsula; KOL, Kolyma Highlands; KOR, Korean Peninsula; KUR, Kurile Archipelago; OKH, Okhotsk Sea Coast; SAK, Sakhalin Island. The data on pond snail occurrences are presented in Table 3. PC1 and component PC2 accounted for 38.8% and 21.1% of the total variance, respectively. The map was created using ESRI ARCGIS v.10 software (www.esri.com/arcgis).
Figure 5 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 5. Shells of the Amphipepleinae species. A, Radix auricularia (Russia, Khabarovsk City, a pond in the city park; LMBI). B, Radix coreana syn. nov., a syntype (ZMB; after Vinarski 2016). C, Radix cf. hamadai (Japan, Hokkaido, Matsumae; LMBI). D, Radix japonica (Japan, Yeddo; SMF). E, R. japonica (Japan, Yokohama; SMF). F, R. japonica (original drawing after Jay 1857). G, Radix onychia (Japan, Lake Biwa, southern shore near Otsu; ZIN). H, Orientogalba ollula (Russia, Primorye Territory, near Possiet Settlement; ZIN). I, Radix plicatula [Taiwan (= 'Formosa'); MNHN]. J, Radix plicatula [East China ('Manchouria, Port-Artur'); MNHN]. K, Kamtschaticana kamtschatica, the lectotype (ZIN). L, K. kamtschatica (Russia, Kamchatka, the Valley of Geysers). M, Kamtschaticana sp.1 (Russia, Kamchatka Peninsula, Lake Azabachye). Scale bars: 1 mm in K; 2 mm in G, H, L, M; 5 mm in A–E, I, J; not given in the original drawing in F. Photographs: Maxim V. Vinarski (A–E, G–J), Tatiana Ya. Sitnikova (K), and Olga V. Aksenova (L, M).
Figure 4 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 4. The copulatory apparatuses of the pond snails discussed in the taxonomic account. A, Dallirhytis atkaensis (Russia, the Chukchi Peninsula, Lake Vaaliuchio). B, Galba sibirica (Mongolia, the Teellin-gol River; after Vinarski et al. 2017b). C, Galba truncatula (Abkhazia, Gagra District, wet shore of Inkit Lake; after Vinarski et al. 2017b). D, Ladislavella liogyra (Russia, Primorye, a pool near Lake Lebedinoye). E, Walhiana catascopium (Russia, Kamchatka, Azabachye Lake; RMBH). F, Lymnaea sorensis (Russia, Kamchatka, Kamchatka River; RMBH). G, Kamtschaticana kamtschatica (Russia, Magadan Region, a water reservoir; after Vinarski et al. 2021). H, Orientogalba ollula (Russia, Primorye Territory, near Possiet Settlement; after Kruglov 2005). I, Radix auricularia (Russia, Tyumen' Region, Vylposl channel near Labytnangi Town). J, Radix plicatula (China, Bejing, an artificial pond in the former Emperor's summer palace; after Vinarski et al. 2020). K, Radix cf. hamadai (Japan, Matsumae; after Vinarski et al. 2020). Scale bars: 1 mm. Photographs: Maxim V. Vinarski (A–D, G, I–K) and Olga V. Aksenova (E, F).
Figure 3 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 3. Shells of the Lymnaeinae species. A, Dallirhytis atkaensis (USA, Alaska, Birch Lake; RMBH). B, Dallirhytis atkaensis (Russia, the Chukchi Peninsula, an unnamed lake; ZIN). C, Galba sibirica (Mongolia, the Teellin-gol River; after Vinarski et al. 2017b). D, Galba truncatula (Russia, Irkutsk Region, vicinities of Kirensk Town; LMBI). E, Ladislavella liogyra (Russia, Amur basin, vicinities of Nikol'sk-Ussuriysky Town; ZIN). F, Walhiana arctica (Canada, Ontario, Hudson's Bay; NHMUK). G, Walhiana catascopium (Canada, British Columbia, Aintworth hot springs; RMBH). H, Walhiana catascopium (Russia, Kamchatka, Azabachye Lake; RMBH). I, Lymnaea jugularis (USA, Michigan, the Rouge River; NHMUK). J, Lymnaea sorensis (Russia, Lake Baikal, a syntype; ZIN). K, Lymnaea jugularis (USA, Minnesota, a neotype with label; ZIN). Scale bars: 2 mm in C, D, F–H; 5 mm in A, B, E, I–K. Photographs: Maxim V. Vinarski (A–F, I–K) and Olga V. Aksenova (G, H).
Figure 7 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
Figure 7. Copulatory apparatuses of the three lymnaeid species described here as new to science. A, Galba pacifica, a paratype (RMBH, no. MLym-1113/4, Naie Stream), soft body and the copulatory apparatus. B, Kamtschaticana nipponica, a paratype (RMBH, no. MLym1115/1), soft body. C, Orientogalba hokkaidoensis, a paratype (RMBH, no. MLym-1114/2), soft body, female part of the reproductive system and the copulatory apparatus. Scale bars: 1 mm (copulatory apparatuses and female reproductive system) and 5 mm (soft bodies). Photographs: Olga V. Aksenova.
Table 3 in Taxonomy and trans-Beringian biogeography of the pond snails (Gastropoda: Lymnaeidae) of East Asia: an integrative view
<p><b>Table 3.</b> Species richness of the native pond snails (Lymnaeidae) in the East Asia and Alaska.</p><table><tbody><tr><th><b>Species</b></th><th><b>HON</b></th><th><b>HOK</b></th><th><b>KOR</b></th><th><b>AMU</b></th><th><b>SAK</b></th><th><b>KUR</b></th><th><b>KAM</b></th><th><b>KOL</b></th><th><b>OKH</b></th><th><b>CHU</b></th><th><b>ALA</b></th></tr><tr><th><b>Subfamily Lymnaeinae Rafinesque, 1815</b></th></tr></tbody><tbody><tr><th><i>Dallirhytis atkaensis</i> (Dall, 1884)</th><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1</td><td>1</td></tr><tr><th><i>Galba pacifica</i></th><td></td><td>1</td><td></td><td></td><td>1</td><td>1</td><td>1</td><td></td><td></td><td></td><td></td></tr><tr><th><i>Walhiana arctica</i> (Lea, 1864) comb. nov.</th><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1</td></tr><tr><th><i>Walhiana catascopium</i> (Say, 1817) comb. nov.</th><td></td><td></td><td></td><td></td><td></td><td></td><td>1</td><td></td><td></td><td>1</td><td>1</td></tr><tr><th><i>Ladislavella liogyra</i> (Westerlund, 1897)</th><td></td><td></td><td></td><td>1</td><td>1</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th><i>Lymnaea sorensis</i> B. Dybowski, 1912</th><td></td><td></td><td></td><td></td><td></td><td></td><td>1</td><td>1</td><td></td><td></td><td></td></tr><tr><th><b>Subfamily Amphipepleinae Pini, 1877</b></th></tr><tr><th><i>Kamtschaticana kamtschatica</i> (Middendorff, 1850)</th><td></td><td></td><td>1</td><td></td><td></td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td></tr><tr><th><i>Kamtschaticana nipponica</i></th><td></td><td>1</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th><i>Kamtschaticana</i> sp.1 (possible undescribed species)</th><td></td><td></td><td></td><td></td><td>1</td><td></td><td>1</td><td></td><td></td><td></td><td></td></tr><tr><th><i>Orientogalba hokkaidoensis</i></th><td>1</td><td>1</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th><i>Orientogalba ollula</i> (Gould, 1859)</th><td>1</td><td>1</td><td>1</td><td>1</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th><i>Radix auricularia</i> (Linnaeus, 1758)</th><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td><td>1</td></tr><tr><th><i>Radix onychia</i> (Westerlund, 1883)</th><td>1</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th><i>Radix plicatula</i> (Benson, 1842)</th><td>1</td><td>1</td><td>1</td><td>1</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th>Total</th><td>5</td><td>6</td><td>3</td><td>5</td><td>4</td><td>2</td><td>6</td><td>3</td><td>2</td><td>4</td><td>5</td></tr><tr><th>Lymnaeinae vs. Amphipepleinae</th><td>0/5</td><td>1/5</td><td>0/3</td><td>1/4</td><td>2/2</td><td>1/1</td><td>3/3</td><td>1/2</td><td>0/2</td><td>2/2</td><td>3/2</td></tr></tbody></table><p>An empty cell indicates the absence of the species in a given area.Distribution areas:ALA, Alaska;AMU,Amur River basin and Primorye;CHU,Chukchi Peninsula; HOK,Hokkaido; HON, Honshu;ḎM, Kamchatka Peninsula;KOL, Kolyma Highlands; KOR,Korean Peninsula; KUR,Kurile Archipelago; OKH, Okhotsk Sea Coast;SAK,Sakhalin Island.</p>
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