scholarly journals First records of Sinanodonta woodiana (Lea, 1834) and Corbicula fluminea (O. F. Müller, 1774) (Mollusca, Bivalvia) from the Adriatic part of Croatia

2020 ◽  
Vol 28 (4) ◽  
pp. 295-302
Author(s):  
Luboš Beran
Keyword(s):  
Shell Length ◽  
Corbicula Fluminea ◽  
Rare Occurrence ◽  
First Time ◽  
Abundant Population ◽  
Sinanodonta Woodiana

Sinanodonta woodiana (Lea) and Corbicula fluminea (O. F. Müller) are among the most invasive aquatic molluscs found in Europe. Both species were recorded in the Adriatic part of Croatia for the first time in 2019 although in the Danubian Croatia they were more common. An abundant population of S. woodiana was found in an oxbow of the Cetina River; mussels with shell length of ca. 12–17 cm dominated. A population of C. fluminea was recorded in the freshwater section of the Zrmanja River above the Jankovića Buk waterfall which forms the border between the brackish and the freshwater sections of the river. Possible pathways of their introduction and reasons for their rare occurrence in contrast to the Danubian Croatia are discussed.

scholarly journals New evidence on the relationships between Hypnophila Bourguignat, 1859 and Gomphroa Westerlund, 1902 (Gastropoda: Eupulmonata: Azecidae)

2020 ◽  
Vol 28 (4) ◽  
pp. 286-294
Author(s):  
Giuseppe Manganelli ◽  
Joanna Pieńkowska ◽  
Ewa Kosicka ◽  
Debora Barbato ◽  
Andrea Benocci ◽  
...  
Keyword(s):  
Shell Length ◽  
Corbicula Fluminea ◽  
Rare Occurrence ◽  
First Time ◽  
New Evidence ◽  
Abundant Population ◽  
Sinanodonta Woodiana

Sinanodonta woodiana (Lea) and Corbicula fluminea (O. F. Müller) are among the most invasive aquatic molluscs found in Europe. Both species were recorded in the Adriatic part of Croatia for the first time in 2019 although in the Danubian Croatia they were more common. An abundant population of S. woodiana was found in an oxbow of the Cetina River; mussels with shell length of ca. 12–17 cm dominated. A population of C. fluminea was recorded in the freshwater section of the Zrmanja River above the Jankovića Buk waterfall which forms the border between the brackish and the freshwater sections of the river. Possible pathways of their introduction and reasons for their rare occurrence in contrast to the Danubian Croatia are discussed.

scholarly journals Integrated Monitoring with Moss-Bag and Mussel Transplants in Reservoirs

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1800
Author(s):  
Gana Gecheva ◽  
Vesela Yancheva ◽  
Iliana Velcheva ◽  
Elenka Georgieva ◽  
Stela Stoyanova ◽  
...  
Keyword(s):  
Trace Element ◽  
Polybrominated Diphenyl Ethers ◽  
Quality Standard ◽  
Fontinalis Antipyretica ◽  
Integrated Monitoring ◽  
Chlorinated Paraffins ◽  
Diphenyl Ethers ◽  
First Time ◽  
Moss Bags ◽  
Sinanodonta Woodiana

For the first time, transplants with moss-bags and mussels together were applied to study the water quality in standing water bodies. The tested species: Fontinalis antipyretica Hedw. and Sinanodonta woodiana (Lea, 1834) were collected from unpolluted sites and analyzed to obtain background levels. Then, the moss and mussels were left in cages for a period of 30 days in three reservoirs where both are not present naturally. Two of the reservoirs suffer from old industrial contamination and one is affected by untreated wastes. Twenty-four compounds were studied, among them trace elements Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Zn and organic priority substances: six polybrominated diphenyl ethers (PBDEs) congeners and short-chain chlorinated paraffins (SCCPs). The trace element accumulation was significant after the exposition period in all studied stations. PBDEs and SCCPs were also accumulated up to two times more in the moss tissues. PBDEs in the mussels exceeded the environmental quality standard (EQS). The applied combined transplants, and especially the moss-bags, revealed severe contamination with heavy metals not detected by the water samples. The moss and the mussel followed a different model of trace element and PBDEs accumulation. The SCCPs levels were alarmingly high in all plant samples. The study confirmed PBDEs and SCCPs as bioaccumulative compounds and suggested that an EQS for SCCPs in biota needs to be established.

scholarly journals Population structure and symbiotic relationships of the invasive species Sinanodonta woodiana (Lea, 1834) in water bodies of Ukraine

2021 ◽  
Vol 280 ◽  
pp. 06006
Author(s):  
Tetiana Yermoshyna ◽  
Оlesia Pavliuchenko
Keyword(s):  
Invasive Species ◽  
Body Weight ◽  
Shell Length ◽  
Native Species ◽  
Relative Number ◽  
Fold Increase ◽  
The Body ◽  
Sex Structure ◽  
Symbiotic Relationships ◽  
Sinanodonta Woodiana

Understanding the process of penetration and distribution of the invasive species Sinanodonta woodiana is important for predicting associated changes in biodiversity and the structure of freshwater communities. The biomass, density, age and sex structure of mollusk populations were analyzed. An increase in the size of Chinese pond mussels was noted after the introduction: the shell length of individuals from a pond (Romanivka village, 2017) was 24,2% more than of mollusks from the Velyka Repida river (Matroska village, 2004), and in 2019 it increased by another 14,7% (by 42,5% compared to the shell length of the mollusks from the Velyka Repida river). The body weight of S. woodiana from the river was 125,3 g, while in the pond there was a 2,13-fold increase in body weight in 2017, with a further increase in this indicator by another 23,6% in 2019 and another 37,7% in 2020. The relative number of S. woodiana and native species Unio pictorum and Anodonta anatina in 2017 was 26,3%, 47,4% and 26,3%, in 2020 – 64,0%, 16,0% and 20,0% respectively. Ciliates of the genus Conchophthirus and Trichodina, Aspidogaster conchicola, Helobdella stagnalis, larvae of Chironomus sp. are in a symbiotic relationship with S. woodiana. The most common Conchophthirus sp. – in 21,6% of individuals. Further spread of S. woodiana to the cold regions of Ukraine and the formation of new populations in the already developed regions should be expected.

scholarly journals Malacological news from the Czech and Slovak Republics in 2020

2021 ◽  
Vol 20 ◽  
pp. 56-74
Author(s):  
Tomáš Čejka ◽  
Luboš Beran ◽  
Radovan Coufal ◽  
Libor Dvořák ◽  
Jaroslav Č. Hlaváč ◽  
...  
Keyword(s):  
Native Species ◽  
New Records ◽  
Corbicula Fluminea ◽  
The Czech Republic ◽  
Cepaea Nemoralis ◽  
Location Data ◽  
First Occurrence ◽  
Ca 50 ◽  
Cornu Aspersum ◽  
First Time

This paper presents important faunistic records including location data with all details conducted in the Czech and Slovak Republics during 2020. Four new non-native species, Arion intermedius, Ambigolimax valentianus, Clathrocaspia knipowitschii and Krynickillus melanocephalus, were recorded outdoors in Slovakia. Radix lagotis was genetically confirmed for the first time from several sites in the Czech Republic and Slovakia. Corbicula fluminea, recorded in Moravia for the first time in 2018, was found in another river, ca 50 km far from the first occurrence. Cepaea nemoralis, recorded in Slovakia for the first time in 2015, seems to have started spreading. New sites of Cornu aspersum were noticed in Prague and Bratislava; for the first time it was also found in Brno. There are also new records of several endangered species, e.g. Vertigo moulinsiana, Pisidium hibernicum, P. globulare, and Pseudanodonta complanata, presented.

scholarly journals First report of Devonian corals from the Bitlis-Pötürge Massif (SE Turkey): a rare occurrence of corals on the northern margin of Gondwana

2021 ◽  
Vol 19 ◽  
pp. 1-11
Author(s):  
Julien Denayer ◽  
Izzet Hoşgör
Keyword(s):  
Upper Devonian ◽  
Arabian Plate ◽  
Rare Occurrence ◽  
Metamorphic Belt ◽  
Northern Margin ◽  
Rugose Corals ◽  
Se Turkey ◽  
First Time ◽  
The Relationship ◽  
Tabulate Corals

The Bitlis-Pötürge Massif of SE Turkey is a metamorphic belt separating the Arabian Plate from the Taurides. It includes a non-metamorphic Palaeozoic sequence that contains locally fossiliferous strata. Here is reported for the first time an assemblage of Upper Devonian rugose and tabulate corals from the Meydan Formation, composed of the rugose Frechastraea schafferi (PENECKE), Peneckiella cf. teicherti HILL, Pseudopexiphyllum supradevonicum (PENECKE), and Macgeea desioi VON SCHOUPPÉ, and the tabulate Thamnopora reticulata (DE BLAINVILLE), Alveolites ex. gr. suborbicularis and Scoliopora sp. The rugose corals suggest a Late Frasnian age. The palaeobiogeographic affinities of corals are discussed. The species F. schafferi and the genus Pseudopexiphyllum –so far only reported from Turkey, Iran and Afghanistan– are probably limited to the northern margin of Gondwana and therefore diagnostic for this palaeogeographic area. Until now, the northern margin of Gondwana yielded very few Upper Devonian corals so this occurrence in SE Turkey is particularly important to estimate the relationship between these corals and the ones from the northern margin of the Palaeotethys Ocean.

Schmidleinema santiniketanense sp. nov. (Cyanobacteria/ Cyanoprokaryota) from a building facade in Santiniketan, India

Phytotaxa ◽  
2016 ◽  
Vol 283 (2) ◽  
pp. 181 ◽  
Author(s):  
NITIN KESHARI ◽  
SUDIPTA KUMAR DAS ◽  
SIBA PRASAD ADHIKARY
Keyword(s):  
West Bengal ◽  
Morphological Characters ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Rare Occurrence ◽  
Climatic Region ◽  
Consensus Tree ◽  
The Family ◽  
First Time

Schmidleinema is a monotypic genus in the family Fischerellaceae (Cyanobacteria / Cyanoprokaryota) with S. indicum is the sole species described so far. Due to its rare occurrence and reported only from a tropical climatic region, the taxon was not thoroughly studied, thus its taxonomic position is ubiquitous. No molecular data of the species is available so far. While studying the aero-terrestrial cyanobacterial flora of Santiniketan, West Bengal (India), a new Schmidleinema species, i.e. Schmidleinema santiniketanense sp. nov. was documented.  Light microscopic study of morphological characters of the species revealed its distinctness from the earlier descriptions of Schmidleinema indicum, particularly in the characteristics of sheath and branching pattern. Partial sequence of 16S rRNA gene of the species was obtained and deposited in GenBank for the first time. A consensus tree prepared with  sequences of different groups of  heterocystous and branched cyanobacteria retrieved from GenBank showed its phylogenetic position.

Spatial and temporal variation in biomass and size structure of Corbicula fluminea in Danube River catchment, Hungary

Biologia ◽  
2012 ◽  
Vol 67 (4) ◽  
Author(s):  
Erika Bódis ◽  
Csaba Sipkay ◽  
Bence Tóth ◽  
Nándor Oertel ◽  
János Nosek ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Chlorophyll A ◽  
Shell Length ◽  
Size Structure ◽  
Corbicula Fluminea ◽  
Dry Mass ◽  
Danube River ◽  
Spatial And Temporal Variation ◽  
River Catchment ◽  
The Danube River

AbstractThe aim of this study was to reveal the spatial and temporal variation in biomass, density, and size structure of the invasive clam, Corbicula fluminea in the Danube River catchment and to explore the environmental factors determining these patterns. Samples were taken seasonally during the years 2007 and 2008 at 15 sites located along a river continuum from a second order stream to the Danube River. C. fluminea was the most abundant species in the main arm of the Danube; however, it was found in great density in the side arms, too. In the Ipoly River it only occured close to the conjuction, and it was not present at all in the second and third order streams. Regression models were developed to predict dry mass (DW, g) from linear body dimension [shell length (L), mm]. For the description of length-dry mass relationship, the power function (DW = a * Lb) was applied. The highest density, biomass, and mean shell length were 178 ind. m−2, 24.9697 g DW m−2, and 21.99 mm, respectively. ANOVA detected significant spatial variation in biomass; however, significant temporal variation was not recorded between the years, only among the seasons. Multiple linear regressions were used to find the relationship between the biomass and the environmental parameters. The coarse and very fine sediment fractions and the high water temperature provided suitable habitat for C. fluminea. Although statistically significant correlation was not detected between the chlorophyll-a content of water and the biomass, the highest biomass values were recorded at sites with high chlorophyll-a value.

Identification of larvae: the zebra mussel (Dreissena polymorpha), quagga mussel (Dreissena rosteriformis bugensis), and Asian clam (Corbicula fluminea)

1994 ◽  
Vol 72 (3) ◽  
pp. 406-417 ◽  
Author(s):  
S. J. Nichols ◽  
M. G. Black
Keyword(s):  
Shell Length ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Corbicula Fluminea ◽  
The United States ◽  
Zebra Mussels ◽  
Shell Size ◽  
Asian Clam ◽  
Clam Corbicula ◽  
Asian Clams

There are presently four freshwater bivalves in the United States that produce larvae or veligers commonly found in the water column: two forms of Asian clams and two species of dreissenids. Portions of the geographic range of three of these bivalves, one species of Asian clam (Corbicula fluminea), zebra mussels (Dreissena polymorpha), and quagga mussels (Dreissena rosteriformis bugensis), overlap, causing problems with larval identification. To determine which characteristics can be used to separate larval forms, adult Asian clams, quaggas, and zebra mussels were brought into the laboratory and induced to spawn, and the resulting larvae were reared. Hybrids between quaggas and zebra mussels were also produced, but not reared to maturity. Characteristics allowing for the most rapid and accurate separation of larvae were hinge length, shell length/height, shell shape, shell size, and the presence or absence of a foot and velum. These characteristics were observed in laboratory-reared larvae of known parentage and field-caught larvae of unknown parentage. In most cases, larvae of the Asian clam can be readily separated from those produced by either type of dreissenid on the basis of shell size and presence of a foot. Separating the gametes and embryos of the two types of dreissenids is not possible, but after shell formation, most of the larval stages can be distinguished. Hinge length, shell length/height, and the similarity in size of the shell valves can be used to separate straight-hinged, umbonal, pediveliger, and plantigrade larvae. Quagga × zebra mussel hybrids show characteristics of both parents and are difficult to identify.

Occurrence of a New Zealand pea crab, Pinnotheres novaezelandiae, in five species of surf clam

1995 ◽  
Vol 46 (7) ◽  
pp. 1071 ◽  
Author(s):  
P Palmer
Keyword(s):  
New Zealand ◽  
Shell Length ◽  
First Record ◽  
Surf Clam ◽  
North West ◽  
Pea Crab ◽  
First Time

In samples from 60 random stations in four depth strata along the Manawatu-Horowhenua coast north-west of Wellington, Pinnotheres novaezelandiae was found in Mactra discors, M. murchisoni and Spisula aequilateralis but not in Paphies donacina or Dosinia anus. This is the first record of P. novaezelandiae from M. murchisoni. The incidence of P. novaezelandiae in each of the three infested species of surf clam was compared. Significantly more pea crabs were found to infest M. discors than M. murchisoni or S. aequilateralis. In Mactra discors the occurrence of pea crabs decreased with increased depth. Carapace widths of pea crabs from M. discors were significantly larger than those from M. murchisoni and S. aequilateralis. No significant differences were found between the carapace widths of pea crabs from M. murchisoni and S. aequilateralis. Crab size was positively correlated to host shell length, with significantly larger crabs inhabiting significantly larger shellfish. Pinnotheres atrinacola was recorded for the first time from S. aequilateralis.

scholarly journals How the fluctuations of water levels affect populations of invasive bivalve Corbicula fluminea (Müller, 1774) in a Neotropical reservoir?

2015 ◽  
Vol 75 (1) ◽  
pp. 135-143 ◽  
Author(s):  
LRP. Paschoal ◽  
DP. Andrade ◽  
G. Darrigran
Keyword(s):  
Population Structure ◽  
Spatial Distribution ◽  
Water Column ◽  
Shell Length ◽  
Native Species ◽  
Corbicula Fluminea ◽  
Water Levels ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Significant Difference

Corbicula fluminea is an invasive bivalve responsible for several environmental and financial problems around the globe. Despite the invasive potential of this species, it suffers certain restrictions in lentic environments due to natural phenomena that significantly affect its population structure (e.g. water column fluctuation and sunlight exposure). The present study addresses how temporal decline of the water level in a Neotropical reservoir and exposure to sunlight affect the population structure of C. fluminea. Samplings were carried out twice in the reservoir of Furnas Hydroelectric Power Station (HPS) (Minas Gerais, Brazil), in 2011 and 2012. Population density, spatial distribution and mean shell length of C. fluminea were estimated for each year after sampling in 51 quadrats (0.0625m2) placed on three transects at different distances along the reservoir margins (0, 10 and 20 m from a fixed-point). We observed a predominance of C. fluminea in both years, with a simultaneous gradual decrease in density and richness of native species in the sampling area. Significant differences in density of C. fluminea were registered at different distances from the margin, and are related to the temporal variability of physical conditions of the sediment and water in these environments. We also registered a trend toward an increase in the density and aggregation of C. fluminea as we moved away from the margin, due to the greater stability of these areas (>10 m). The mean shell length of C. fluminea showed significant difference between the distinct distances from the margin and during the years, as well as the interaction of these factors (Distances vs.Years). These results were associated with the reproductive and invasive capacity of this species. This study reveals that these temporal events (especially water column fluctuation) may cause alterations in density, spatial distribution and mean shell length of C. fluminea and the composition of the native malacofauna in Neotropical lentic environments.

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