scholarly journals Compilation of information on occurrence and conservation status for the freshwater mussel fauna of Nebraska, Kansas, and Oklahoma

Data Series ◽  
2021 ◽  
Author(s):  
Natasha B. Carr ◽  
Tammy S. Fancher
Keyword(s):  
Conservation Status ◽  
Freshwater Mussel

scholarly journals POPULATIONS OF MICROCONDYLAEA BONELLII (FÉRUSSAC 1827), UNIONIDAE – AN EUROPEAN FRESHWATER MUSSEL AT RAPID DECLINE - AND UNIO MANCUS IN ISTRIA, CROATIA

2018 ◽  
Vol 17 ◽  
pp. 53-59
Author(s):  
Alexander C. Mrkvicka
Keyword(s):  
Adriatic Sea ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Rapid Decline ◽  
Eastern Region ◽  
Habitat Directive ◽  
Habitat Changes ◽  
The Eu ◽  
Construction Works ◽  
Severe Flooding

Microcondylaea bonelli (Férussac 1827) inhabits rivers in the northern and eastern region of the adriatic sea. Actual IUCN conservation status is VU (vulnerable), it is listed in Annex V of the Flora-Fauna-Habitat directive of the EU. Due to construction works, frequent severe flooding and habitat changes the species is in rapid decline in its whole area. Conservation status should therefore be altered to CR (Critically Endangered) and the habitats of the remaining populations especially in Croatia managed to stop the decline.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Food Source ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Freshwater Ecosystems ◽  
State Laws ◽  
Mussel Species ◽  
Symbiotic Relationships ◽  
Mussel Shells ◽  
The Many ◽  
Freshwater Mollusks

<em>Abstract</em>.—Catfishes are important in freshwater ecosystems not only as consumers, but also as essential partners in symbiotic relationships with other organisms. Freshwater mollusks are among the many organisms that have interactions with catfishes. For example, ictalurids are hosts for larvae of several native freshwater mussel species. The larvae, which attach briefly to gills or fins of fish to complete their development to the free-living juvenile stage, disperse via upstream and downstream movement of host fish. In turn, freshwater mussels serve as a food source for some catfish species while other catfish species may use spent mussel shells for habitat. Ictalurids also benefit from the conservation status of many freshwater mussel species. Federal and state laws protecting these invertebrates can preserve water quality and habitat and, at times, provide incentives and funding for conservation and restoration of stream and riparian habitats.

scholarly journals Microcondylaea bonellii as a new host for the European bitterling Rhodeus amarus

2020 ◽  
pp. 4
Author(s):  
Ronaldo Sousa ◽  
Arthur E. Bogan ◽  
Duarte V. Gonçalves ◽  
Jasna Lajtner ◽  
Vincent Prié ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Water Circulation ◽  
Filter Feeding ◽  
Suitable Host ◽  
New Host ◽  
Physiological Cost ◽  
First Time

We report for the first time that the freshwater mussel Microcondylaea bonellii (Férussac, 1827) functions as a suitable host for the European bitterling Rhodeus amarus (Bloch, 1782). Given the recent expansion of R. amarus in Europe, the possible physiological cost (e.g. competition for oxygen, reduction in water circulation, and consequent impairment of filter-feeding) of this interaction may further affect the already poor conservation status of M. bonellii populations.

Molecular phylogeny, biogeography, and conservation status of the Texas-endemic freshwater mussel Lampsilis bracteata (Bivalvia, Unionidae)

Zootaxa ◽  
2019 ◽  
Vol 4652 (3) ◽  
pp. 442-456
Author(s):  
ISABEL PORTO-HANNES ◽  
LYUBOV E. BURLAKOVA ◽  
ALEXANDER Y. KARATAYEV ◽  
HOWARD R. LASKER
Keyword(s):  
Endemic Species ◽  
Management Practices ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Common Species ◽  
River Drainage ◽  
Land And Water Management ◽  
Guadalupe River ◽  
Central Texas ◽  
Definition Of

Lampsilis bracteata (Gould), the Texas Fatmucket, is a regional endemic species in the central Texas biogeographic province which is a candidate to be listed as threatened or endangered under the Endangered Species Act of 1973. Lampsilis bracteata is morphologically similar to the common species L. hydiana (Lea). Here, we examine the molecular taxonomic identification of L. bracteata, and compare its historical range with its current geographic distribution. Tests of genetic affinities based on two mitochondrial genes typically used for DNA barcoding (cytochrome oxidase subunit 1, COI and NADH dehydrogenase subunit 1, ND1) support recognition of L. bracteata as a full species. An unexpected spin-off result was that ND1 sequences of L. satura (Lea), a threatened species in Texas, formed a highly supported cluster within putative L. cardium Rafinesque. As an endemic species, the distribution of L. bracteata has been historically restricted; however, poor land and water management practices have further reduced its distribution from eighteen to just eight streams in the Colorado River drainage and to one stream in the Guadalupe River drainage. For L. bracteata, as for many other imperiled freshwater mussel species, effective conservation measures rely on correct species identification, definition of its geographic range and assessment of its changes in the recent past. 

scholarly journals Conservation status and a novel restoration of the endangered freshwater mussel Unio crassus Philipsson, 1788: Poland case

2021 ◽  
pp. 3
Author(s):  
Marianna Soroka ◽  
Barbara Wasowicz ◽  
Katarzyna Zając
Keyword(s):  
Genetic Diversity ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Freshwater Ecosystems ◽  
Anthropogenic Influence ◽  
Population Abundance ◽  
Protection Measures ◽  
Active Protection ◽  
New Localities ◽  
Improve Water Quality

Bivalves play an important part in freshwater ecosystems and improve water quality; the thick-shelled river mussel Unio crassus is classified as a bioindicator. Unfortunately, the species is regarded as endangered and is under species protection in the whole of Europe. The reasons for the drastic decline of its populations are: considerable eutrophication of waters, anthropogenic influence in its broad sense and the presence of invasive species. The life cycle of U. crassus includes the stage of larva which is an obligatory parasite of fish. This makes it possible for the species to disperse and populate new territories but it limits the development to places where appropriate host species are available. Intensive measures have been taken in Poland to protect U. crassus, while in France numerous new localities of the species have been bar-coded. In 2010–2014 active protection measures were taken in southern Poland, including inventorying, studies of genetic diversity and reintroductions. The project contributed to the increase in population abundance and in the number of localities of the thick-shelled river mussel, which resulted in a twofold increase in the range of occurrence of the species in the river. The procedures presented here can and should be used in further restitution of U. crassus not only in Poland but also elsewhere in Europe.

scholarly journals Range decline and conservation status of Westralunio carteri Iredale, 1934 (Bivalvia:Hyriidae) from south-western Australia

2015 ◽  
Vol 63 (2) ◽  
pp. 127 ◽  
Author(s):  
Michael W. Klunzinger ◽  
Stephen J. Beatty ◽  
David L. Morgan ◽  
Adrian M. Pinder ◽  
Alan J. Lymbery
Keyword(s):  
Western Australia ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Iucn Red List ◽  
Environmental Data ◽  
Extent Of Occurrence ◽  
The North ◽  
Secondary Salinisation ◽  
Management Measures ◽  
Iucn Red List Criteria

Westralunio carteri is the only species of freshwater mussel found in south-western Australia and, owing to a lack of comprehensive information on its ecology, its conservation status has been speculative. To more accurately predict the true conservation status of this species, the historical and contemporary distributional records were modelled with environmental data that identified salinity, perenniality and total nitrogen as variables responsible for limiting the species’ current extent of occurrence, inferring threatening processes. The species was found to have undergone a 49% reduction in extent of occurrence in less than three generations, due primarily to secondary salinisation. Current distribution is bounded by Gingin Brook in the north to the Kent, Goodga and Waychinicup Rivers in the South, within 50–100 km of coastal south-western Australia. Field observations indicated that W. carteri was almost never found at sites where mean salinity was >1.6 g L–1. This was corroborated by laboratory tolerance trials that showed that W. carteri has an acute salinity tolerance (LD50) of 1.6–3.0 g L–1. Application of IUCN Red List criteria indicates that W. carteri qualifies for listing as vulnerable. Conservation management measures should focus on maintaining existing populations.

scholarly journals Distribution, Period of Gravidity, and Host Identification for the Narrow Pigtoe Mussel

2020 ◽  
pp. 0000-0000
Author(s):  
Kathryn M Holcomb ◽  
Jordan M Holcomb ◽  
Sandra C Pursifull ◽  
John R Knight
Keyword(s):  
Fish Species ◽  
Yellow River ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Distribution Data ◽  
Cyprinella Venusta ◽  
Status Assessment ◽  
Hydrologic Unit Code ◽  
Gravid Females ◽  
Fish Hosts

The narrow pigtoe Fusconaia escambia is a freshwater mussel found only in the Escambia and Yellow river basins in northwest Florida and southern Alabama. It is listed as threatened under the U.S. Endangered Species Act. Like other freshwater mussels (Unionidae), its life cycle involves a larval stage (i.e., glochidial) in which most species are obligate parasites on the gills or fins of fishes. Knowledge of life history, population demographics, population genetics, and threats for the narrow pigtoe is lacking throughout its range, which impedes conservation of this species. Therefore, our objectives were to 1) compare historical and current distribution data using a conservation status assessment map, 2) determine period of gravidity, and 3) identify fish hosts. We used a conservation status assessment map to examine spatial and temporal changes in narrow pigtoe distribution and the possibility that the species has been extirpated from a subbasin (i.e., Hydrologic Unit Code level 10 watershed boundary; U.S. Geological Survey National Hydrography Dataset). Period of gravidity for the narrow pigtoe was determined by examining the gills of mussels in the field, and peak gravidity was considered to be the month in which the greatest number of gravid females was encountered. Fish hosts were determined by infecting individuals of 18 fish species with glochidia in a laboratory setting. Overall, the narrow pigtoe appears to be maintaining stable populations in Florida, but too few surveys have been conducted in Alabama subbasins for us to fully assess its status throughout its range. Peak months of gravidity were May-July, with the greatest percent of gravid females observed in May, although they were observed as early as 9 March and as late as 25 October. Nine fish species from five genera were identified as hosts for narrow pigtoe, with Blacktail Shiner Cyprinella venusta and Weed Shiner Notropis texanus consistently producing the greatest number of viable juvenile mussels. Host and gravidity findings from this study will be useful if propagation efforts become necessary for conservation of the narrow pigtoe.

scholarly journals The importance of museum collections in determining biodiversity patterns, using a freshwater mussel Unio caffer (Krauss 1848) as an example

Bothalia ◽  
2019 ◽  
Vol 49 (1) ◽  
Author(s):  
Bayanda Sonamzi ◽  
Musa C. Mlambo ◽  
Chris C. Appleton ◽  
Helen M. Barber-James
Keyword(s):  
South African ◽  
Conservation Status ◽  
Freshwater Mussel ◽  
Conservation Assessment ◽  
Biodiversity Patterns ◽  
Distribution Maps ◽  
Larval Stages ◽  
Near Future ◽  
Compare And Contrast ◽  
Incomplete Picture

Background: Two recent distributional maps of the African freshwater mussel Unio caffer (Krauss 1848) in South Africa represented an incomplete picture compared to the records held by the national museums.Objectives: This study is partly in response to them, with the aim to compare and contrast the distribution maps of the published papers with the distribution records held by the national museums.Method: We requested the distribution records of U. caffer from four South African museums. We visited and worked on the U. caffer collections of three of these museums to confirm the taxonomic identity of their specimens and gather occurrence records. We also extracted the distributional records from the two published maps, and plotted all these records using the geographic information system, ESRI ArcGIS.Results: The distribution map based on the museum records showed that this species occurred in all nine provinces of the country, thus revealing a much broader historical occurrence than previous known.Conclusion: This study demonstrates the crucial function of museums, natural history collections in facilitating understanding about biodiversity patterns using U. caffer distribution as an example. However, as museum records mainly show historical occurrence, there is a need to conduct further studies to assess the current population trends of this species. Although the current International Union for Conservation of Nature (IUCN) conservation assessment of this species is Least Concern, pressures on native fish, which host the larval stages of this mussel, and the declining environmental conditions of rivers in the country may affect the conservation status in the near future.

scholarly journals Conservation of the endangered freshwater mussel Solenaia carinata (Bivalvia, Unionidae) in China

2018 ◽  
Vol 26 ◽  
pp. 33-53 ◽  
Author(s):  
Yan-Ling Cao ◽  
Xiong-Jun Liu ◽  
Rui-Wen Wu ◽  
Tao-tao Xue ◽  
Long Li ◽  
...  
Keyword(s):  
Freshwater Mussels ◽  
Conservation Status ◽  
Morphological Characteristics ◽  
Freshwater Mussel ◽  
Lake Basin ◽  
Ecological Value ◽  
Low Genetic Diversity ◽  
Reproduction Period ◽  
Endangered Status ◽  
Resource Conditions

Despite the diversity and economic and ecological value of freshwater mussels, relatively little is known about their biology (especially for species outside of Europe and North America). Solenaiacarinata is an endangered freshwater mussel, is endemic to China and is now only distributed in Poyang Lake basin. However, its conservation status is not clear. Thus, for this study, surveys were conducted at 41 sites along the lower reaches of the Ganjiang River to study the conservation status of S.carinatus. The results showed that S.carinata had a restricted distribution and extremely low density. In addition, the habitat sediments where S.carinata was located were mainly composed of silt (particle size &lt;0.0625 mm). RDA analysis showed that the density of S.carinata was correlated to dissolved oxygen, temperature, turbidity and chlorophyll-a. Microsatellite analysis showed that S.carinata had a low genetic diversity (mean HO: 0.419; mean HE: 0.484; mean PIC: 0.430). At the same time, we firstly report the glochidia of S.carinata and describe its morphological characteristic. Surprisingly, its reproduction period and morphological characteristics were different from that of others freshwater mussels. Therefore, this study clarified the resource conditions, endangered status and threat factors for S.carinata and it provided a theoretical basis for the conservation and management of its resources.

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