22 results on '"UNIO crassus"'
Search Results
2. On the reintroduction of the endangered thick-shelled river mussel Unio crassus: The importance of the river's longitudinal profile.
- Author
-
Zając, Katarzyna, Florek, Jacek, Zając, Tadeusz, Adamski, Paweł, Bielański, Wojciech, Ćmiel, Adam M., Klich, Mariusz, and Lipińska, Anna M.
- Subjects
- *
UNIO crassus , *WATER quality , *HABITATS , *SEDIMENTS , *ABIOTIC environment - Abstract
Freshwater mussels of the order Unionida provide important ecosystem functions and services. Unfortunately, some previously widespread species are now seriously endangered. To restore the historical range of the population of Unio crassus in the Biała River, southern Poland, the species was reintroduced into a series of ‘stepping stones’ joining two remnant populations. During the first phase of the study, the relationships between the abundance of U . crassus , physical habitat, and water quality were studied to assess reintroduction potential. In general, chemical water quality improved upstream from the existing population, favouring the decision for reintroduction, whereas morphological variables worsened. Mussel abundance was correlated negatively with the elevation and slope of channel, organic matter contents, and pH (exceeding 8.0), but positively with silt presence, water conductivity, and concentrations of HCO 3 − , Ca 2 + , and NO 3 − . During the second phase, adult individuals were introduced into one type of functional habitat—marginal channel sectors with still water and fine sediment. Despite the initial very high rate of reproduction in some parts of the upper reach of the river, the juveniles were ultimately recruited only in the lower part of the restored range, resulting in a very rapid change in recruitment at a channel slope of 1.8‰. Recruitment was positively related to silt content, conductivity, and Ca 2 + and HCO 3 – ions, negatively to channel elevation and slope, and water pH. The host fish species showed no correlation with abiotic habitat features within the studied reach. These results imply that most of the habitat traits related to U . crassus occurrence depended on the river's longitudinal profile, not on the chemical water quality, and that final success of introduction should be evaluated after several years. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
3. What can we infer from the shell dimensions of the thick-shelled river mussel <italic>Unio crassus</italic>?
- Author
-
Zając, Katarzyna, Zając, Tadeusz, and Ćmiel, Adam
- Subjects
- *
UNIO crassus , *BIVALVE shells , *MOLLUSK morphology , *ECOLOGICAL niche , *PHENOTYPIC plasticity , *TAPHONOMY , *SEXUAL dimorphism - Abstract
We studied shell variation in the thick-shelled river mussel (
Unio crassus Philipson, 1788) sampled from two sites of very different character: (1) a rocky channel (San river) and (2) a fine-sediment channel (Zborowianka river). The analyzed mussels differed significantly between the sampled channels in almost all analyzed phenotypic traits and shape indices. Intersexual variation was so low that it cannot be used effectively for sexing in this species. The growth rate was much higher in the fine-sediment and nutrient-rich channel than in the rocky one, but the asymptotic shell length for the rocky channel was larger than for the fine-sediment channel, suggesting higher survival in the mountainous, unmodified river. Shell size differed significantly within the rocky channel, depending on microhabitat: shell size and dorsal arching were much greater in mussels living in the strong current of the rocky midchannel than in those inhabiting still water at the nearest bank. The results demonstrate that microhabitat conditions significantly determine shell shape. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
4. Příspěvek k poznání vodních měkkýšů Jihlavy [A contribution to the knowledge of aquatic molluscs of the Jihlava River]
- Author
-
Beran, Luboš
- Subjects
Fishery ,geography ,geography.geographical_feature_category ,biology ,Mollusca ,Section (archaeology) ,Unio crassus ,Tributary ,faunistics ,Unionidae ,biology.organism_classification - Abstract
This paper presents results of a malacological survey of the middle and upper section of the Jihlava River, a tributary of the Dyje River (Czech Republic). Twenty-three species of aquatic molluscs (13 gastropods, 10 bivalves) were found at 35 sites during research realised mostly in 2017 and 2020. In comparison with the lower section of the Jihlava River, a significantly lower proportion of bivalves of the family Unionidae was found in the middle and upper sections.
- Published
- 2021
5. The complete maternal and paternal mitochondrial genomes of Unio crassus: Mitochondrial molecular clock and the overconfidence of molecular dating.
- Author
-
Burzyński, Artur, Soroka, Marianna, Mioduchowska, Monika, Kaczmarczyk, Agnieszka, and Sell, Jerzy
- Subjects
- *
MITOCHONDRIAL proteins , *UNIO crassus , *UNIONIDAE , *FRESHWATER mussels , *GENOMES - Abstract
The availability of a rapidly growing number of complete mitochondrial genome sequences provokes high confidence dating approaches. However, even if the congruence between mitochondrial and nuclear markers is reasonable, the resulting topologies are frequently questionable. The unique opportunity to study the evolutionary history of two independent mitochondrial genomes in one phylogenetic context exists in the freshwater mussels family Unionidae. The two lineages function under doubly uniparental inheritance since well before the emergence of the family. Despite the relatively high number of available complete sequences of maternally inherited genomes, comparative analyses are limited by the small number of sequences of counterpart paternally inherited genomes. We have sequenced for the first time the representative set of five sequences (two maternal and three paternal) from the species Unio crassus . Comparative analysis of the phylogenies reconstructed using relevant mitogenomic data available in GenBank (13 species in total) reveal that single – genome inferences are congruent only if the relaxed clock is assumed. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
6. JUSTIFICATION FOR THE NECESSITY OF REGISTRATIONIN THE RED DATA BOOK OF UKRAINE THE UNIO CRASSUS PHILIPSSON, 1788 (MOLLUSCA, BIVALVIA, UNIONIDAE)
- Author
-
S. Mezhzheryn, L. Vasilieva, M. Taradainyk, and L. Shevchuk
- Subjects
Geography ,biology ,Unio crassus ,IUCN Red List ,Zoology ,General Medicine ,Unionidae ,biology.organism_classification ,Bivalvia ,Mollusca - Published
- 2019
7. Unio crassus Philipsson 1788
- Author
-
Marković, Vanja, Gojšina, Vukašin, Novaković, Boris, Božanić, Milenka, Stojanović, Katarina, Karan-Žnidaršič, Tamara, and Živić, Ivana
- Subjects
Unionidae ,Unio ,Mollusca ,Animalia ,Biodiversity ,Unionoida ,Unio crassus ,Taxonomy ,Bivalvia - Abstract
82. Unio crassus Philipsson, 1788 Findings in Serbia. Unio stevenianus: Tadić (1960). Unio dokici: Tadić (1960). Unio piscinalis: Droüet (1881, 1884); Tadić (1960). Unio cytherea: Droüet (1881, 1884); Dokić (1882); Tadić (1960). Unio crassus: Dokić (1882); Tadić (1960); Marković (1999); Živić et al. (2001); JDS-ITR Report (2002); Simić et al. (2006); Novaković (2012, pers. comm. 2012, 2014, 2018); Savić (2012); Raković (2015); Lucić et al. (2015); Tomović et al. (2010 b); Tomović (2016). Common name. Thick shelled river mussel. Morphology. Large bivalve. Shell is distinctly rounded in the posterior end, with a completely rounded dorsal margin. It reaches 70 mm (rarely up to 120 mm) in length, 45 mm in height and 35 mm in depth. For more details see Welter-Schultes (2012: 12, figure on the top of the page). Distribution and ecology. Western Palearctic species preferring clean waters (rivers and smaller watercourses) in lowland regions. It usually could be found on a sandy or stony substrate, avoiding polluted muddy rivers. In Serbia it has been found in the Sava, Tisza, Velika and Zapadna Morava, Nišava and Kolubara Rivers and catchments. There are also sporadic findings of the species in the Danube River (Tadić 1960; Tomović et al. 2016). This mussel rarely reaches altitudes over 300 m. a.s.l. in Serbia, while in the neighboring Bulgaria, for example, an abundant population has been recorded as high as nearly 900 m. a.s.l. (Kenderov & Sashov 2017). Other remarks. Despite its relatively wide distribution range it is one of Europe’s most endangered freshwater mussel taxa, being assessed as EN on the IUCN Red List (Lopes-Lima et al. 2014 a) and listed in the 92/43 EEC Directive (annexes II and IV; Directive, 1992). The species is protected on national level as well by Serbian national regulative (Annex 1-strictly protected species; Official Gazette of RS 5/2010, 47/2011, 32/2016, 98/2016). One of the limiting ecological factors for this species are juveniles, which are extremely sensitive to any pollution and require well-oxygenated waters (Welter-Schultes 2012). There are 318 nominal species as synonyms (Graf & Cummings 2021)., Published as part of Marković, Vanja, Gojšina, Vukašin, Novaković, Boris, Božanić, Milenka, Stojanović, Katarina, Karan-Žnidaršič, Tamara & Živić, Ivana, 2021, The freshwater molluscs of Serbia: Annotated checklist with remarks on distribution and protection status, pp. 1-64 in Zootaxa 5003 (1) on page 39, DOI: 10.11646/zootaxa.5003.1.1, http://zenodo.org/record/5120059, {"references":["Tadic, A. (1960) Najvazniji predstavnici skoljaka roda Unio iz Save, Dunava i Kopackog jezera. Prirodnjacki muzej, Beograd, 46 pp. [in Serbian]","Dokic, L. (1882) Skoljke u Srbiji. Grada za faunu Kraljecine Srbije. Kraljevsko-srpska drzavna stamparija, Beograd, 36 pp. [in Serbian]","Zivic, I., Markovic, Z. & Brajkovic, M. (2001) Macrozoobenthos in the Pusta Reka river, left tributary of the South Morava river. Archives of Biological Sciences, 53 (3 - 4), 109 - 122.","JDS-ITR National Tisza Report (2002) Report on the joint investigation of the Tisza River on the territory of the FR Yugoslavia within the international JDS-ITR Program. Federal Hydro- Meteorological Institute, Belgrade, 52 pp.","Simic, V., Simic, S., Petrovic, A., Paunovic, M., Soric, V. & Dimitrijevic, V. (2006) Biodiversity in aquatic ecosystems in Serbia (BAES ex situ online database). Faculty of Sciences, Kragujevac. Available from: http: // baes. pmf. kg. ac. rs (accessed 12 April 2015)","Novakovic, B. (2012) Indicative ecological status assessment of the Juzna Morava River based on aquatic macroinvertebrates. Water research and management, 2 (4), 45 - 50.","Savic, A. (2012) Ecological analysis of macrozoobenthos communities in the Nisava River. University of Belgrade, Belgrade, 172 pp. [PhD. Thesis, in Serbian]","Rakovic, M. (2015) Diversity of Molluscs in the Danube River (1260 - 863.5 rkm) and Taxonomic Analysis of the Genera Planorbarius, Radix, Physella and Ferrissia (Pulmonata: Basommatophora). University of Belgrade, Belgrade, 147 pp. [PhD. thesis, in Serbian]","Lucic, A., Paunovic, М., Tomovic, J., Kovacevic, S., Zoric, K., Simic, V., Atanackovic, A., Markovic, V., Kracun-Kolarevic, M., Hudina, S., Lajtner, J., Gottstein, S., Milosevic, D., Andus, S., Zganec, K., Jaklic, M., Simcic, T. & Vilenica, M. (2015) Aquatic macroinvertebrates of the Sava River. In: Milacic, R, Scancar, J. & Paunovic, M. (Eds.), The Handbook of Environmental Chemistry. Vol. 31. The Sava River. Springer, Heidelberg, New York, Dordrecht, London, pp. 335 - 359. https: // doi. org / 10.1007 / 978 - 3 - 662 - 44034 - 6 _ 13","Tomovic, J., Vrankovic, J., Zoric, K., Borkovic Mitic, S., Pavlovic, S., Saicic, Z. & Paunovic, M. (2010 b) Malakofauna of the Serbian stretch of the Danube River and studied tributaries (the Tisza, Sava and Velika Morava). In: Paunovic, M, Simonovic, P, Simic, V. & Simic, S. (Eds.), Danube in Serbia - Joint Danube survey 2. Ministry of Agriculture, Forestry and Water Management - Directorate for Water, University of Kragujevac, Faculty of Science, Institute for Biology and Ecology, University of Belgrade, Institute for Biological Research \" Sinisa Stankovic \", Belgrade, pp. 207 - 224.","Tomovic, J. (2016) Ekologija, biodiverzitet i konzervacija slatkovodnih skoljki familije Unionidae u Srbiji. Univerzitet u Kragujevcu, Kragujevac, 157 pp. [PhD. thesis, in Serbian]","Welter-Schultes, F. W. (2012) European non-marine molluscs, a guide for species identification, planet poster editions. Planet Poster Editions, Gottingen, 674 pp. [in German]","Kenderov, L. & Sashov, Y. (2017) New record of thick shelled river mussel Unio crassus (Unionidae, Bivalvia) from Palakaria river, Bulgaria. Ecological Engineering and Environment Protection, 9, 96 - 99.","Lopes-Lima, M., Kebapcy, U. & Van Damme, D. (2014 a) Unio crassus. The IUCN Red List of Threatened Species, 2014, e. T 22736 A 42465628. Available from: https: // doi. org / 10.2305 / IUCN. UK. 2014 - 1. RLTS. T 22736 A 42465628. en (accessed 11 March 2021)","Directive, H. (1992) Council Directive 92 / 43 / EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora. Official Journal of the European Union, 206, 7 - 50.","Graf, D. L. & Cummings, K. S. (2021) The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves). Available from: http: // www. mussel-project. net / (accessed 20 March 2021)"]}
- Published
- 2021
- Full Text
- View/download PDF
8. Potential use of beaverCastor fiberL., 1758 dams by the thick-shelled river musselUnio crassusPhilipsson, 1788
- Author
-
Krzysztof Kukuła, Aneta Bylak, Ewa Kukuła, and Joanna Szmuc
- Subjects
0106 biological sciences ,Beaver ,biology ,Ecology ,010604 marine biology & hydrobiology ,Endangered species ,Mussel ,Unionidae ,biology.organism_classification ,Bivalvia ,010603 evolutionary biology ,01 natural sciences ,Habitat ,Unio crassus ,biology.animal ,Genetics ,Animal Science and Zoology ,Mountain stream ,Ecology, Evolution, Behavior and Systematics - Abstract
The objective of this paper is to draw attention to a previously unrecognised habitat for Unio crassus Philipsson, 1788 (Bivalvia: Unionidae), namely beaver dam-and-pond complexes. The construction...
- Published
- 2019
9. Metal concentrations in archaeological and contemporary mussel shells (Unionidae): Reconstruction of past environmental conditions and the present state
- Author
-
Anna Przystupińska, Martyna Błaszczyk, Małgorzata Ożgo, Łukasz J. Binkowski, and Peter Massanyi
- Subjects
Pollution ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,media_common.quotation_subject ,0208 environmental biotechnology ,Fresh Water ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Metal ,Unio ,Animal Shells ,Animals ,Environmental Chemistry ,0105 earth and related environmental sciences ,media_common ,Environmental Biomarkers ,biology ,Public Health, Environmental and Occupational Health ,Unio pictorum ,General Medicine ,General Chemistry ,Mussel ,Unionidae ,biology.organism_classification ,Archaeology ,020801 environmental engineering ,Metals ,Unio crassus ,Unio tumidus ,visual_art ,visual_art.visual_art_medium ,Environmental science ,Poland ,Bioindicator ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
Freshwater mussels are widely used in the monitoring of pollution because they are filter-feeding, long-lived animals that tend to accumulate metals in their shells. The temporal scale of such studies can reach thousands of years, since the composition of shells preserves them against decay. This allows us to reconstruct past environmental conditions and to compare current environmental conditions to those prevalent thousands of years ago. Here we assessed metal concentrations (Ca, Cd, Cr, Cu, Fe, Hg, Ni, Pb and Zn) in recently harvested mussel shells and mussel shells found by archaeologists, and tested the hypothesis that levels of some metals are higher in today's shells, reflecting increasing anthropogenic impact. We observed lower metal concentrations (with the exception of Cd) in shells found by archaeologists (n = 35) than in recently harvested mussel shells (n = 14) (Unio crassus, Unio pictorum, Unio tumidus) in the same water bodies. There were no significant differences in metal levels among species in shells found by archaeologists, while in recently harvested mussels almost all metals for which we tested were found in their highest levels in Unio crassus. The results suggest that metal concentrations in prehistoric times were lower than today, which probably reflects human impact, rather than changes in the geochemical structure of rocks. The results also revealed that metal transfer between mussel shells and surrounding deposits does not occur. We therefore suggest that they might be successfully used as independent bioindicators.
- Published
- 2019
10. AQUATIC MOLLUSC FAUNA OF THE OHŘE RIVER -- AN IMPORTANT SITE OF UNIO CRASSUS PHILIPSSON, 1788 (BIVALVIA: UNIONIDAE) IN NORTHWESTERN BOHEMIA.
- Author
-
BERAN, LUBOŠ
- Subjects
- *
UNIO , *ANIMALS , *UNIONIDAE , *ACTINONAIAS , *BIVALVES - Abstract
Mollusc communities of the Ohře (Eger) River, which drains a large part of northwestern Bohemia, were studied. In total, 43 freshwater mollusc species (22 gastropods, 21 bivalves) were found at 56 sites. The richest malacofauna (31 species) was recorded in the lower river section. One empty shell of Margaritifera margaritifera, a species regarded as critically endangered in the Czech Republic, was found. There are no previous records of this bivalve in the Ohře River and its tributaries, and its recent occurrence there is unlikely. Planorbis carinatus, Unio crassus, Pseudanodonta complanata, Pisidium amnicum and P. moitessierianum, endangered in the Czech Republic, were recorded. The population of U. crassus is the largest in northwestern Bohemia and one of the largest in the Czech Republic. It is divided in two parts by the Nechranice dam lake. Likewise, populations of other species are negatively affected by the dam, as well as by the pollution and watercourse alteration. In some sites the muskrat (Ondatra zibethicus) was observed to predate on unionids and especially on U. crassus. The occurrence of five alien species (Potamopyrgus antipodarum, Physella acuta, Gyraulus parvus, Corbicula fluminea, Dreissena polymorpha) was confirmed. A gradual invasion of C. fluminea was observed; the species is predated by an unidentified animal, probably also muskrat. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
11. EFFECTIVE GROWTH CESSATION IN ADULT UNIO CRASSUS PHILIPSSON, 1788 (BIVALVIA: UNIONIDAE) FROM GERMANY.
- Author
-
NAGEL, KARL-OTTO, DÜMPELMANN, CHRISTOPH, and PFEIFFER, MICHAEL
- Subjects
- *
UNIO crassus , *BIVALVES , *UNIONOIDA , *FRESHWATER mussels - Abstract
Information on the growth and age of the endangered freshwater mussel Unio crassus Philipsson, 1788 is crucial to correctly assess the conservation status of a particular population. This long-term study of individually marked specimens from four populations from central and southwest Germany revealed that zero growth and shrinkage of adult mussels from the upper 50% of their population's length range were common phenomena. Therefore, overall shell length measurements or counting of growth lines on the shells of live adult mussels may grossly underestimate their age and should be regarded as unsuitable for determining the actual age structure of a population. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
12. Comparison of visual observation and excavation to quantify density of the endangered bivalve Unio crassus in rivers of north-eastern France.
- Author
-
Lamand, F. and Beisel, J. N.
- Subjects
UNIO crassus ,BIVALVES ,MOLLUSK populations ,MARINE sediments ,HABITAT destruction - Abstract
Copyright of Knowledge & Management of Aquatic Ecosystems is the property of EDP Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2014
- Full Text
- View/download PDF
13. Effects of water temperature on the larval parasitic stage of the thick-shelled river mussel (Unio crassus).
- Author
-
Taeubert, Jens‐Eike, El‐Nobi, Gamal, and Geist, Juergen
- Subjects
FRESHWATER mussels ,WATER temperature ,CLIMATE change ,PHOXINUS phoxinus ,UNIO crassus - Abstract
ABSTRACT The complex life-cycle of freshwater mussels from the superfamily Unionoidea includes an obligate parasitic phase on a suitable host fish, which makes freshwater mussels particularly susceptible to disruption by environmental stressors. In particular, temperature stress due to rising ambient temperatures resulting from heated effluents, damming of streams and deforestation of banks or climate change may have detrimental effects on threatened mussel species., In this study, the effect of four different temperature regimes (12 °C, 17 °C, 20 °C and 23 °C) on the development and metamorphosis success of Unio crassus encysted on Phoxinus phoxinus was investigated., The highest metamorphosis success as well as the lowest host mortality were found at a temperature of 17 °C. Duration of development was inversely related to the temperature at which the hosts were maintained., Excystment of living juvenile mussels was found between 265 and 357 degree-days for 23 °C and between 433 and 632 degree-days for 12 °C., In conclusion, water temperature during the parasitic phase of U. crassus plays an important role in development and metamorphosis and should be considered in the conservation of the species through catchment management and in the artificial propagation of this species as well as in other endangered mussel species., Copyright © 2013 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
14. JUSTIFICATION FOR THE NECESSITY OF REGISTRATIONIN THE RED DATA BOOK OF UKRAINE THE UNIO CRASSUS PHILIPSSON, 1788 (MOLLUSCA, BIVALVIA, UNIONIDAE)
- Author
-
Shevchuk (Yanovych), L., Vasilieva, L., Taradainyk (Pampura), M., and Mezhzheryn, S.
- Subjects
Unionidae ,Unio crassus ,distribution ,settlement density ,the Red Data Book of Ukraine ,rare species ,перлівницеві (Unionidae) ,поширення ,щільність поселення ,Червона книга України ,рідкісний вид - Abstract
The article substantiates the necessity of registration in the Red Data Book of Ukraine the Unio crassus Philipsson, 1788 – a mollusk, which is an indicator of water purity and an important factor of self-purification of hydro-ecosystems. As a result of monitoring studies, 300 species of Unionidae-like biotopes within all river basins of Ukraine during the period 1993-2018 have been marked with a sharp reduction of the species distribution area. Mollusk has become quite rare in the basins of the Siverskyi Donets, Dniester, Dnieper, Southern Bug, Crimea rivers, and it has not been detected at all in the hydrocenoses of the Western Bug, although in the 40-60s of the last century it was considered to be a widespread species in these regions. Its occurrence in modern reservoirs of Ukraine is only 15 %. The most common Unio crassus in the Prypiat basin (41 % occurrence) U. crassus is a rheophilic species found only in rivers. Given the overall degradation of the country’s aquatic ecosystems, the tendency to reduce the occurrence of U. crassus may intensify, which is why it is important to undertake appropriate environmental measures in a timely manner aimed at preserving the malacofauna of water basins and streams of Ukraine. In due course, this species should be listed in the Red Data Book of Ukraine with the status of “vulnerable”., У статті обґрунтовано необхідність внесення до Червоної книги України перлівниці Unio crassus – молюску, що є індикатором чистоти води та важливим чинником самоочищення гідроекосистем. У результаті моніторингових досліджень 300 типових для перлівницевих біотопів у межах усіх річкових басейнів України у період 1993-2018 рр. відмічено різке скорочення території поширення виду. Молюск став досить рідкісним у басейнах Сіверського Дінця, Дністра, Дніпра, Південного Бугу, річках Криму, а в гідроценозах Західного Бугу він взагалі не виявлений, хоча ще у 40-60-х рр. минулого століття вважався розповсюдженим видом у цих регіонах. Зустрічальність його у сучасних водоймах України становить лише 15%. Найбільш поширена перлівниця в басейні Прип’яті (зустрічальність – 41%). U. crassus – це реофільний вид, виявлений лише у річках. В умовах загальної деградації водних екосистем країни тенденція щодо зменшення зустрічальності U. crassus може посилитись, саме тому важливо вчасно провести відповідні природо- охоронні заходи, спрямовані на збереження малакофауни водойм і водотоків України. На часі внести даний вид до Червоної книги України, надавши статусу «вразливий».
- Published
- 2019
15. Toxicity tests of chlorinated hydrocarbons on the river mussel, Unio crassus (Bivalvia, Unionidae).
- Author
-
SÁRKÁNY-KISS, Andrei, HERCZEG, Ildikó, PALOMBI, Barbara, GRIGORSZKY, István, ANTAL, László, BÁCSI, István, MOZSÁR, Attila, KALMÁR, Attila Ferenc, and NAGY, Sándor Alex
- Subjects
ORGANIC solvents ,TETRACHLOROETHANE ,TETRACHLOROETHYLENE ,TRICHLOROETHYLENE ,UNIO crassus ,CHLOROHYDROCARBONS ,HYDROCARBONS ,UNIONIDAE - Abstract
The toxicity of three highly volatile organic solvents - tetrachloroethane (Cl
2 HC-CHCl2 ), tetrachloroethylene (Cl2 C=CCl2 ), trichloroethylene (ClHC=CCl2 ) - was studied on Unio crassus specimens. The tested chlorinated hydrocarbons sink to the bottom of standing water bodies due to their high density; therefore they represent an increased risk for benthic organisms. For a start, all three compounds were applied in 100% saturation. In the case of tetrachloroethylene and trichloroethylene all specimens died within a few days. In the case of tetrachloroethane the intoxication process was much faster, all the specimens died within 4 hours. Tetrachloroethane proved to be the most toxic compound; its diluted solutions were further tested: in the 5% solution all U. crassus specimens died after 24 hours. The 1% solution had a strong disturbing effect on the behaviour of the bivalves, which was gradually moderated and eventually stopped on the 33rd day. These results suggest that the examined chlorinated hydrocarbons are strongly toxic to living organisms even in aquatic medium and cause rapid death even in low concentrations. [ABSTRACT FROM AUTHOR]- Published
- 2012
16. Host limitation of the thick-shelled river mussel: identifying the threats to declining affiliate species.
- Author
-
Douda, K., Horký, P., Bílý, M., Gompper, Matthew, and Johnson, Jerald
- Subjects
- *
BIVALVES , *FRESHWATER animals , *HOST specificity (Biology) , *UNIO crassus , *UNIONIDAE - Abstract
The conservation of endangered affiliate species, which are critically dependent on the presence of another species, is often hindered by a poor understanding of the relationships between the interacting partners. The parasitic stage of endangered unionid bivalves constitutes a tight host-affiliate linkage between the mussels and their host fishes. However, the threats resulting from potential shortages of the host species are rarely sufficiently quantified and incorporated into conservation strategies. In this paper, we integrated both host quality and availability analyses to assess the potential threats to the endangered thick-shelled river mussel Unio crassus that result from the impairment of its host resources in Central Europe. The experimental determination of the compatibility of U. crassus parasitic larvae (glochidia) with its potential host fishes revealed an intermediate level of host specificity. At least, some glochidia successfully developed on 14 of the 27 potential hosts that were evaluated. Nevertheless, only three fish species ( Scardinius erythrophthalmus, Phoxinus phoxinus and Cottus gobio) enabled the majority of the attached glochidia to transform successfully. Subsequently, our analysis of host availability at sites inhabited by living or extirpated populations of U. crassus showed that the local extirpations of U. crassus are likely associated with an impaired status of the fish assemblage and with the absence of the primary host fishes. These results indicate that the availability of host fish resources may have played at least an additive role in the present pan- European decline of U. crassus and that the evaluation of host limitation without precise data on the host compatibility or host abundance may be ineffective for identifying the threats to particular species. It demonstrates a strong need for more thorough incorporation of host limitation issues into conservation strategies for U. crassus and probably also for other species of freshwater mussels that were previously considered safe from host limitation. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
17. In vitro culture of glochidia of the threatened freshwater mussel Unio crassus Philipsson 1788 – the dilution problem
- Author
-
Magdalena Gąsienica-Staszeczek, Tadeusz Zając, Katarzyna Zając, and Paweł Olejniczak
- Subjects
0106 biological sciences ,biology ,Ecology ,010604 marine biology & hydrobiology ,Parasitism ,Mussel ,Unionidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Unio crassus ,Threatened species ,Animal Science and Zoology ,Developmental Biology - Abstract
We applied in vitro techniques in culturing glochidia of the thick-shelled river mussel Unio crassus, seriously threatened European species. Glochidia were freshly isolated from a gravid female. Th...
- Published
- 2017
18. Use of transponders for individual marking of Unio crassus Philipsson, 1788 (Bivalvia: Unionidae) in mountain rivers
- Author
-
Katarzyna Zając
- Subjects
0106 biological sciences ,Fishery ,biology ,Ecology ,Unio crassus ,010604 marine biology & hydrobiology ,Unionidae ,biology.organism_classification ,Bivalvia ,010603 evolutionary biology ,01 natural sciences - Published
- 2017
19. Notes on the thick-shelled river mussel Unio crassus Philipsson, 1788 (Bivalvia: Unionidae) in Stradomka (southern Poland), a tributary of the Raba river
- Author
-
Maciej Bonk
- Subjects
geography.geographical_feature_category ,thick-shelled river mussel ,biology ,Mussel ,Unionidae ,Bivalvia ,biology.organism_classification ,Fishery ,Stradomka ,Geography ,Unio crassus ,Tributary ,Raba tributary - Published
- 2016
20. Effective growth cessation in adult Unio crassus Philipsson, 1788 (Bivalvia: Unionidae) from Germany
- Author
-
Michael Pfeiffer, Christoph Dümpelmann, and Karl-Otto Nagel
- Subjects
education.field_of_study ,biology ,Range (biology) ,Ecology ,Unio crassus ,Population ,Endangered species ,Conservation status ,Mussel ,Unionidae ,Bivalvia ,biology.organism_classification ,education - Abstract
Information on the growth and age of the endangered freshwater mussel Unio crassus Philipsson, 1788 is crucial to correctly assess the conservation status of a particular population. This long-term study of individually marked specimens from four populations from central and southwest Germany revealed that zero growth and shrinkage of adult mussels from the upper 50% of their population’s length range were common phenomena. Therefore, overall shell length measurements or counting of growth lines on the shells of live adult mussels may grossly underestimate their age and should be regarded as unsuitable for determining the actual age structure of a population. Key wOrDs: growth cessation, age determination, long-term study, Unio crassus, Unionidae
- Published
- 2015
21. The comparative and genetic methods for East European Unionidae taxonomy
- Author
-
Alibek Abdrakhmanov, Aleksandra S. Anisimova, Alexey S. Kondrashov, Victor V. Bogatov, and Tatyana V. Neretina
- Subjects
Eastern european ,Pseudanodonta ,Unio crassus ,Unio tumidus ,Zoology ,Taxonomy (biology) ,Unio pictorum ,Biology ,Unionidae ,biology.organism_classification ,Pseudanodonta complanata - Abstract
Taxonomy of freshwater mussels from family Unionidae has been ambiguous for a long time. A number of methods used for their identification, including the so-called comparative method, are based on shell morphology. However, this morphology turned out to have a high level of within-species variation, and the shape of the shell of a specimen depends strongly on its environment and conditions of growth. For these reasons, the number of species recognized by the comparative method kept increasing. We applied both the comparative morphological method and methods of molecular genetics to address the taxonomy of Unionidae. We performed the comprehensive study of 70 specimens of Unionidae mussels collected from the River Ivitza, Volga basin. The specimens represented 14 comparative species, belonging to 4 comparative genera of Unionidae: Colletopterum, Pseudanodonta, Unio and Crassiana. Sequencing of the nuclear (ITS1) and mitochondrial (COI, 16S rDNA) genetic regions revealed 5 groups with high within-group genetic homogeneity separated from each other by long genetic distances. According to the comparison with the available sequences, these groups correspond to 3 Eastern European genera and 5 species: Anodonta anatina, Pseudanodonta complanata, Unio pictorum, Unio tumidus and Unio crassus. The results obtained indicate that the comparative method is inappropriate for the taxonomic analysis of East European Unionidae.
- Published
- 2018
- Full Text
- View/download PDF
22. Unio crassus Philipsson in Retzius 1788
- Author
-
Klishko, Olga, Lopes-Lima, Manuel, Froufe, Elsa, Bogan, Arthur, Vasiliev, Lyudmila, and Yanovich, Lyudmila
- Subjects
Unionidae ,Unio ,Mollusca ,Animalia ,Biodiversity ,Unionoida ,Unio crassus ,Taxonomy ,Bivalvia - Abstract
Unio crassus Philipsson in Retzius, 1788 Synonyms (in the study area) Unio musivus Spengler, 1793. Unio nana Lamarck, 1819. Unio fusculus Ziegler in Rossm��ssler, 1835. Unio irgizlaica Lindholm, 1904. Description. Shell is oval, thick (up to 8.9 mm in the anterior shell area) and moderately inflated. The ratio of shell width to its height is 0.61���0.80, and the ratio of shell height to its length is 0.46���0.62. The umbo is wide projecting considerably above the dorsal margin. Umbo sculpture is wrinkled or consists of double-looped waves and knobs. Periostracum ranges from green to dark brown, sometimes with rays from the umbo to the ventral margin. Nacre is light blue, light violet or pinkish-white. Pseudocardinal teeth are flattened relatively thick (2.5���3.0 mm) and curved. The outer and inner pseudocardinal teeth of the left valve are generally separated with similar lengths and levels of projection, but occasionally the inner is higher than the outer pseudocardinal tooth. A dark strip on the foot may be well pronounced or not. The papillae of the incurrent aperture are short, conic, and located in two rows close to each other. Comparisons. This species differs from U. pictorum and U. tumidus by having an oval shell shape, often wrinkled umbo sculpture and a higher shell height/length ratio (0.46���0.62). The labial palps in U. crassus are longer and larger than in U. pictorum and U. tumidus. The papillae of the incurrent aperture of U. crassus are shorter and arranged in two rows, whereas there are three to four rows in U. pictorum and U. tumidus. Distribution. In the Ukraine and European Russia restricted to the Black, Caspian and Baltic Sea basins, also found in a restricted range in Transbaikalia, Asian Russia (Fig. 1)., Published as part of Klishko, Olga, Lopes-Lima, Manuel, Froufe, Elsa, Bogan, Arthur, Vasiliev, Lyudmila & Yanovich, Lyudmila, 2017, Taxonomic reassessment of the freshwater mussel genus Unio (Bivalvia: Unionidae) in Russia and Ukraine based on morphological and molecular data, pp. 93-112 in Zootaxa 4286 (1) on page 109, DOI: 10.11646/zootaxa.4286.1.4, http://zenodo.org/record/828332, {"references":["Retzius, A. J. (1788) Dissertatio historico-naturalis sistens nova testaceorum genera. Quam venia ampliss. Facult. Philosophicae Praeside D. M. Andr. J. Retzio [= A. J. Retzius], ad publicum examen defert laurentius Munter Philipsson Scanus. Ad diem X. Decembris 1788. Typis Berlingianis, Lundae, 23 pp.","Spengler, L. (1793) Beskrivekse over et nyt Slaegt af de toskallede Konkylier forhen af migkaldet Chaena, saa der Linneiske Slaegt Mya, hvilket noire bestemmes, og inddeles i tvende Slaegter. Skrivter af Naturhistorie-Selskabet, KiObenhavn, 3 (1), 16 - 69, pl. 2.","Lamarck, J. - B. M. (1819) Histoire Naturelle des Animaux Sans Vertebres. Vol. 6. Imprimerie de A. Belin, Paris, 343 pp.","Rossmassler, E. (1835) Iconographie der Land- und Susswasser-Mollusken, mit vorzuglicher Berucksichtigung der europaischen noch nicht abgebildeten Arten. 1 (1 & 1). Arnoldische Buchhandlung, Dresden und Leipzig, 132 & 26 pp.","Lindholm, W. (1904) Zur Molluskenfauna der Governements Kursk und Orenburg. Annual Report of Zoological Museum of Imperial Academy of Sciences, 8, 338 - 344."]}
- Published
- 2017
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.