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23 results for “aquatic snails”
Aquatic macrophyte, snail, and crayfish abundance and richness data for ten lakes in Vilas County, WI, USA, 1987-2020
Data accompanying the paper Szydlowski et al. "Macrophyte and snail community responses to 30 years of population declines of invasive rusty crayfish (Faxonius rusticus)." Macrophytes and snails were sampled in ten lakes in Vilas County, Wisconsin, USA during summer sampling events in 1987, 2002, 2011, and 2020. Lakes had varying levels of invasion by F. rusticus, which affected measures of macrophytes and snails. Macrophytes were sampled using a point-intercept transect method and snails were sampled using different sampler types which were dependent on substrate. Macrophytes were sampled at 6-14 sites per lake and snails were sampled at 16-31 sites per lake. Crayfish were regularly sampled at either 24 or 36 sites per lake between 1987 and 2020. Overall, this dataset provides abundance and richness data for over 25 species of snails and over 40 species of macrophytes in 10 north temperate lakes.
Fig. 1 in Ladislavella Occulta (Jackiewicz, 1959) - A Species Of Aquatic Snails New For Hungary With Remarks On Its Distribution In Central And Eastern Europe
Fig. 1. Shells of Ladislavella occulta from Hungary and Poland. Upper row – Hungary, Bátorliget (HNHM), lower row – three paratypes of this species from Rawicz, Poland (ZIN). Scale bars: 2 mm
Fig. 2 in Ladislavella Occulta (Jackiewicz, 1959) - A Species Of Aquatic Snails New For Hungary With Remarks On Its Distribution In Central And Eastern Europe
Fig. 2. Shells of L. occulta (A-G) and L. terebra (H) from various countries of Central and Eastern Europe. A. Ukraine, Zhitomir Region, Dzerzhinsk (ZMB); B. Germany, Halle District, Salziger Lake (NMG); C. Ukraine, Transcarpathian Region, a pool in Khust District (LMBI); D. Russia, Moscow Region, Oka River basin, without exact locality (ZMMU); E. Russia, Republic of Mordovia, Alatyr' River near Obrochnoye station (ZIN); F. Russia, Kursk Region, Seym River near L'gov Town (ZIN); G. Ukraine, Poltava Region, Lubny District, Pleistocene deposits (ZIN); H. Russia, Barents Sea, Kolguev Island (ZMMU). Scale
Fig. 3. A in Ladislavella Occulta (Jackiewicz, 1959) - A Species Of Aquatic Snails New For Hungary With Remarks On Its Distribution In Central And Eastern Europe
Fig. 3. A map of Europe showing known findings of L. occulta. The Pleistocene records are not shown, This map is based on data published in literature (JACKIEWICZ 1998, 2000; BERAN 2008, STADNICHENKO 2004, ANISTRATENKO et al. 2018) and own data. Squares indicate findings identified by anatomical data; circles – findings based on empty shells. The location of Bátorliget is indicated by a star
Data from: Distribution, population dynamics and potential impacts of the invasive snail, Tarebia granifera in aquatic ecosystems of north-eastern South Africa
<p>Aquatic ecosystems globally have been invaded by molluscs. <em>Tarebia granifera</em> is a highly successful invader, often becoming the dominant aquatic invertebrate species in an invaded ecosystem. Resultingly, it has been suggested that <em>T. granifera</em> may have severe negative impacts on these invaded ecosystems. Limited information is available regarding the population structures and densities of <em>T. granifera</em>, particularly in invaded countries such as South Africa, and information on this could assist in developing management and control strategies for this invasive species. The aim of the present study was to assess the current distribution, densities, and population structures of <em>T. granifera</em> in invaded habitats on the Limpopo and Phongolo River systems, South Africa. This was accomplished by collecting aquatic benthic molluscs from sites across these systems. Water quality parameters were measured at each site and water samples collected for chemical nutrient analyses. The density of snails was determined for each site and the population size and structure as well as birth rate was calculated for <em>T. granifera. </em><em>Tarebia granifera</em> was found to be the dominant molluscan species in habitats where it was present and all size classes from new-born to mature adults were found throughout at some of the highest densities globally. Worryingly, native molluscan species, were often absent or in much lower densities than reported in literature at sites where <em>T. granifera</em> was present, suggesting a negative effect on the native molluscan density and diversity. Contrary to most previous studies, there were no significant correlations between <em>T. granifera </em>and the selected water quality parameters. Higher densities and new-born recruitment of <em>T. granifera </em>were observed in the spring than autumn, likely in response to shifts in environmental conditions. This study provides crucial insights into the population structure and dynamics of <em>T. granifera</em> in invaded habitats, particularly for relatively newly invaded regions such as southern Africa.</p>
Environmental Reconstructions Based on Aquatic and Terrestrial Snails Originating from the Early Bronze Age and the Late Islamic Period– A Stable Isotope Case Study from the Al-Khashbah Archaeological Site, Sultanate of Oman
<p>Supplementary data for the article: "Environmental Reconstructions Based on Aquatic and Terrestrial Snails Originating from the Early Bronze Age and the Late Islamic Period– A Stable Isotope Case Study from the Al-Khashbah Archaeological Site, Sultanate of Oman"</p>
Parasite infection and the movement of the aquatic snail Potamopyrgus antipodarum along a depth cline
<ol> <li>Parasite species that use two or more host species during their life cycle depend on successful transmission between these species. These successive host species may have different habitat requirements; for example, one host species can be aquatic while the other is terrestrial. To overcome this complicating factor in transmission, a wide diversity of parasite species have adaptations that alter habitat preference in one host species in order to facilitate transmission to the next host species.</li> <li>Two common trematode parasites from New Zealand, <em>Atriophallophorus</em> <em>winterbourni</em> and <em>Notocotylus</em> spp., both have a two-host life‑cycle. The aquatic snail <em>Potamopyrgus</em> <em>antipodarum</em> is the intermediate host, from which the parasites require transmission to dabbling ducks or other waterfowl. Of these parasites, <em>A</em>. <em>winterbourni</em> is most frequently found in snails from the shallow-water margin, which may indicate parasite-induced movement of infected snails to the foraging habitat of dabbling ducks.</li> <li>To test if the parasites manipulate the snails to move to shallow water, we stretched tubular mesh cages across depth-specific ecological habitat zones in a lake. Both infected and healthy snails were released into the cages. After eleven days, significantly higher infection frequencies of <em>A. winterbourni</em> were retrieved from the shallowest end of the cages, while <em>Notocotylus</em> spp. frequencies did not vary with depth.</li> <li>The hypothesis that <em>A. winterbourni</em> induces its snail host to move toward the shallow-water habitat cannot be rejected based on the results from the experiment. Although additional research will be needed to address alternative explanations, the depth preference of infected snails may be a parasite adaptation that facilitates trophic transmission of parasites to dabbling ducks.</li> </ol>
Parasite infection and the movement of the aquatic snail Potamopyrgus antipodarum along a depth cline
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Evolution of aquatic snails' defences resulted in clade-specific differences in egg toxicity, pigments, and warning colouration
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Data from: Distribution, population dynamics and potential impacts of the invasive snail, Tarebia granifera in aquatic ecosystems of north-eastern South Africa
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FIGURE 4 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 4. Ranges of occurrence of species of the family Physidae. 1—P. acuta, 2—A. hypnorum, 3—P. gyrina, 4—P. fontinalis (Feliksiak 1939; Adam 1960; Backhuys 1975, Vidal Abarca & Suarez 1986; Lisický 1991; Anderson 1996, 1997;Turner et al. 1998; Cossignani & Cossignani 1995; Kerney 1999; Anderson 2003; Beran 2004; Bank 2006; Yildirim et al. 2006; Son 2007; Horsȃk et al. 2010; Glöer & Diercking 2010; CABI Data Mining 2011; Bódis et al. 2012; Laenko 2012; Van Damme et al. 2012; Welter-Schultes 2012; Glöer 2015; Vinarski et al. 2015; Raković et al. 2016; Piechocki & Wawrzyniak-Wydrowska 2016; Moroz et al. 2017; Cieplok & Spyra 2020; www.faunaeuropea.org; http://www.animalbase.uni-goettingen.de).
FIGURE 7 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 7. Characteristic features of P. gyrina with special emphasis on the white lip (10.18150/WOIHYB) (Phot. M. Gawlak).
FIGURE 3 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 3. Scanning electron microscopy image of A. hypnorum shell (10.18150/UFOMHM) A, B—front (with visible lip) and back side of the shell, C—projecting lamellar crystals on the lip (Phot. A—C M. Gawlak).
FIGURE 2 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 2. Scanning electron micrographs of the shell apex of Physidae (10.18150/FIZSWX) Horizontally: A—P. acuta (subsidence ponds); B—A. hypnorum (anthropogenic ponds, Poland); C—P. fontinalis (Nida River, Poland); D—P. gyrina (Ireland, The Argory- ditch and Sandy Bay L Neagh; Wales, Gwent Levels in pond in flood plain (l. Killen); E- Apex of the small (young) specimens—1—P. acuta, 2—A. hyponorum, 3—P. fontinalis, 4—P. gyrina (Phot. A–E M. Gawlak).
FIGURE 1 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 1. Physidae of Western and Central Europe (10.18150/YPDFJU)—general shell morphology A—Physa acuta (Phot. M. Kanturski), B—Aplexa hypnorum, C—Physa fontinalis, D—Physa gyrina; 1—front side of the shell, 2—shell from the side view, 3—back side of the shell (Phot. B–D A. Cieplok, A. Spyra).
FIGURE 6. P in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 6. P. acuta shell features (SEM) (10.18150/G6UWMN); in which the sutural belts are visible (A), the structure of a white lip (B) with characteristic projecting lamellar crystals (C) is indicated by an arrow (Phot. A–C M. Gawlak), (D) a view of the lip visible under the stereoscopic microscope (Phot. M. Kanturski).
FIGURE 8 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 8. Correspondence Analysis (CA) diagram for the Physidae species; 1—Whorl convexity, 2—Spire, 3—Shell thickness, 4—Thickened appendages, 5—Shell shine, 6—Shell width and height ratio, 7—Aperture height, 8—Shell height, 9—Lip, 10—Apex, 11—Shell width, 12—Aperture width, 13—Spire height.
FIGURE 5 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 5. SEM micrograph of a P. fontinalis shell (10.18150/HIMKRE) (A–C) (Phot. M. Gawlak).
Figure 1 from: Vinarski M (2015) Conceptual shifts in animal systematics as reflected in the taxonomic history of a common aquatic snail species (Lymnaea stagnalis). Zoosystematics and Evolution 91(2): 91-103. https://doi.org/10.3897/zse.91.4509
Figure 1 - A great pond snail in its natural environment. 12.08.2014. Russia, Western Siberia, "Malaya Sos'va" Nature Reserve, Kopanoye Lake (photo: M. Vinarski).
Figure 4 from: Vinarski M (2015) Conceptual shifts in animal systematics as reflected in the taxonomic history of a common aquatic snail species (Lymnaea stagnalis). Zoosystematics and Evolution 91(2): 91-103. https://doi.org/10.3897/zse.91.4509
Figure 4 - Varieties of Lymnaea stagnalis as they were identified by malacologists of the 19th century. A. Lymnaea stagnalis var. typica (det. S. Clessin; ZIN). B. Lymnaea stagnalis var. media (det. C.A. Westerlund; GNM). C. Lymnaea stagnalis var. producta (det. C.A. Westerlund; GNM). D. Lymnaea stagnalis var. rosea (identified by a unknown person; ZMUC). E. Lymnaea stagnalis var. colpodia (det. C.A. Westerlund; GNM). F. Lymnaea stagnalis var. variegata (det. C.A. Westerlund; GNM). G. Lymnaea stagnalis var. turgida (det. C.A. Westerlund; GNM). H. Lymnaea stagnalis var. raphidia (det. C.A. Westerlund; GNM). I. Lymnaea stagnalis var. palustriformis (det. A. Fuchs, NHMW). Scale bars 5 mm.
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