scholarly journals An insight into the structure, composition and hardness of a biological material: the shell of freshwater mussels

RSC Advances ◽  
2020 ◽  
Vol 10 (49) ◽  
pp. 29543-29554 ◽  
Author(s):  
Anupam Chakraborty ◽  
Saida Parveen ◽  
Dipak Kr. Chanda ◽  
Gautam Aditya
Keyword(s):  
Biological Material ◽  
Freshwater Mussels ◽  
Freshwater Mussel ◽  
Mussel Shells ◽  
Insight Into

Freshwater mussel shells: prospects as multifunctional biological material.

X-ray Fluorescence Analysis of Trace Metals in the Annual Growth Layers of Freshwater Mussel Shells

1989 ◽  
Vol 33 ◽  
pp. 665-670
Author(s):  
William E. Maddox ◽  
Leon Duobinis-Gray ◽  
David A. Owen ◽  
James B. Sickel
Keyword(s):  
Trace Metals ◽  
Metal Pollution ◽  
Freshwater Mussels ◽  
Freshwater Mussel ◽  
Fluorescence Analysis ◽  
Annual Growth ◽  
X Ray ◽  
Filter Feeders ◽  
Mussel Shells

Freshwater mussels (Mollusca: Unionidae) are filter feeders that are relatively immobile, widely distributed and are known to concentrate trace metals in their shells (1,2,3). These characteristics make them good candidates for monitoring metal pollution in lakes and rivers. Another characteristic of mussels that make them particularly attractive as pollution monitors is the fact the shell is deposited in distinctive, annual growth layers. The concentrations of metals in these shell layers may provide a history ol the metals present in the environment where the mussel was collected.

scholarly journals Morphology and distribution of the freshwater mussel Diplodon granosus, a rare and poorly understood species

2020 ◽  
Vol 50 (1) ◽  
pp. 44-53 ◽  
Author(s):  
Igor Christo MIYAHIRA ◽  
Maria Cristina Dreher MANSUR ◽  
Daniel Mansur PIMPÃO ◽  
Sheyla Regina Marques COUCEIRO ◽  
Sonia Barbosa dos SANTOS
Keyword(s):  
South America ◽  
Freshwater Mussels ◽  
Freshwater Mussel ◽  
Wide Distribution ◽  
Large Area ◽  
The North ◽  
Coastal Rivers ◽  
The Status ◽  
Long Time

ABSTRACT Diplodon granosus was one of the first freshwater mussels to be described for South America. However, the status of the species was confusing for a long time, receiving different taxonomic treatments. In this paper, we redescribe the shell, with new data on the soft parts and information on the distribution and conservation of D. granosus, a rarely recorded species. The shell is thin, not inflated; the macrosculpture is composed only by granules that cover the whole shell, not forming bars; the microsculpture comprises short spikes. In the soft parts we highlight the few, weak and irregularly distributed lamellar connections of the outer demibranch and some features of the stomach, such as the distally enlarged minor typhlosole. There are records of D. granosus over a large area of South America, from Guiana to Argentina. However, most of these records are related to other species and the distribution of D. granosus is restricted to the north of South America in the basins of the Amazonas and Orinoco rivers, and coastal rivers in between. Despite this wide distribution, the species occurs in specific habitats, mainly streams (igarapés), resulting in an extremely fragmented occurrence. Thus, any disturbance to these habitats can threat this freshwater mussel.

Freshwater mussel shells (Unionidae) describe anthropogenic changes to trace element cycling within a North American river

2018 ◽  
Vol 616-617 ◽  
pp. 1066-1076 ◽  
Author(s):  
W. Aaron Wilson ◽  
Andrea K. Fritts ◽  
Mark W. Fritts ◽  
Jason M. Unrine ◽  
Brent N. Tweedy ◽  
...  
Keyword(s):  
Trace Element ◽  
North American ◽  
Freshwater Mussel ◽  
Element Cycling ◽  
Anthropogenic Changes ◽  
American River ◽  
Mussel Shells

scholarly journals Mussels and Local Conditions Interact to Influence Microbial Communities in Mussel Beds

2022 ◽  
Vol 12 ◽  
Author(s):  
Edward Higgins ◽  
Thomas B. Parr ◽  
Caryn C. Vaughn
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Microbial Community Composition ◽  
Canopy Cover ◽  
Freshwater Mussel ◽  
Local Conditions ◽  
Individual Organism ◽  
Mussel Shells ◽  
Landscape Scales ◽  
And Function

Microbiomes are increasingly recognized as widespread regulators of function from individual organism to ecosystem scales. However, the manner in which animals influence the structure and function of environmental microbiomes has received considerably less attention. Using a comparative field study, we investigated the relationship between freshwater mussel microbiomes and environmental microbiomes. We used two focal species of unionid mussels, Amblema plicata and Actinonaias ligamentina, with distinct behavioral and physiological characteristics. Mussel microbiomes, those of the shell and biodeposits, were less diverse than both surface and subsurface sediment microbiomes. Mussel abundance was a significant predictor of sediment microbial community composition, but mussel species richness was not. Our data suggest that local habitat conditions which change dynamically along streams, such as discharge, water turnover, and canopy cover, work in tandem to influence environmental microbial community assemblages at discreet rather than landscape scales. Further, mussel burrowing activity and mussel shells may provide habitat for microbial communities critical to nutrient cycling in these systems.

scholarly journals Photo images, 3D/CT data and mtDNA of the freshwater mussels (Bivalvia: Unionidae) in the Kyushu and Ryukyu Islands, Japan, with SEM/EDS analysis of the shell

2019 ◽  
Vol 7 ◽  
Author(s):  
Yuichi Kano ◽  
Yoshihisa Kurita ◽  
Kazuki Kanno ◽  
Kengo Saito ◽  
Hironori Hayashi ◽  
...  
Keyword(s):  
Freshwater Mussels ◽  
Freshwater Mussel ◽  
Open Science ◽  
Freshwater Ecosystems ◽  
Ryukyu Islands ◽  
3D Ct ◽  
Sem Images ◽  
Kyushu Island ◽  
The Ryukyu Islands ◽  
Ct Data

Freshwater mussels (Bivalvia: Unionidae), which are keystone species of freshwater ecosystems, are in global decline. In addition to ecological/genetic studies, morphological examinations are needed to help provide information for the development of additional freshwater mussel studies and eventually conservation efforts for freshwater ecosystems. The microscopic structure, which can be obtained by scanning electron microscopy (SEM) and elemental composition, which can be obtained with energy dispersive X-ray spectrometry (EDS), of mollusc shells are of interest to malacologists. However, information about freshwater mussels is still limited. Kyushu Island is the southernmost island of the four major islands of Japan. Kyushu Island is a hotspot of bitterling fishes in Japan, which simultaneously means that the island is a hotspot of freshwater mussels. The Ryukyu Islands stretch southwest from Kyushu Island to Taiwan; a freshwater mussel of unknown origin was reported from the Ryukyu Islands. Digital archiving for biology and ecology is a continuing challenge for open science. This data paper describes online published photo images, 3D/CT and mtDNA data and SEM/EDS analyses of the shell of freshwater mussels that inhabit the Kyushu and Ryukyu Islands, Japan. Our data will provide basic information regarding freshwater biology and be of public interest as open science. Photo images, 3D/CT data, mtDNA data, SEM images and EDS elemental analysis of freshwater mussels that inhabit the Kyushu and Ryukyu Islands (61 individuals, nine species/subspecies) were published online in a local database (http://ffish.asia/Unionidae3D), GBIF (http://ipt.pensoft.net/resource?r=unionidae3d) and DDBJ/EMBL/Genbank (LC431810–LC431840).

scholarly journals Molecular phylogeny reveals a new genus of freshwater mussels from the Mekong River Basin (Bivalvia: Unionidae)

2021 ◽  
Vol 775 ◽  
pp. 119-142
Author(s):  
Ekgachai Jeratthitikul ◽  
Chirasak Sutcharit ◽  
Peng Bun Ngor ◽  
Pongpun Prasankok
Keyword(s):  
River Basin ◽  
New Genus ◽  
Freshwater Mussels ◽  
Phylogenetic Analyses ◽  
Freshwater Mussel ◽  
Mekong River ◽  
Mekong River Basin ◽  
Mitochondrial Coi ◽  
Evolutionary Distinctiveness ◽  
Molecular Phylogenetic

A new genus of freshwater mussels (Bivalvia: Unionidae) is described from the Mekong River Basin as Namkongnaia gen. nov. The validity of the new genus is supported by its unique conchological characteristics, namely the lack of hinge dentition and elongated shells, together with its evolutionary distinctiveness as estimated by multi-locus phylogenetic analyses (mitochondrial COI and 16S, and nuclear 28S genes). The new genus includes two lineages with deep divergence, shown by 5.10% uncorrected COI p-distance. One lineage is a type species described herein as Namkongnaia inkhavilayi gen. et sp. nov. The other is a recognized species under the name ‘Pilsbryoconcha lemeslei (Morelet, 1875)’. Molecular phylogenetic analysis further shows that the new genus belongs to the tribe Pseudodontini, and evolutionarily is closely related to the genus Monodontina Conrad, 1853. However, its conchology is similar to the genus Pilsbryoconcha Simpson, 1900. Time-calibrated phylogeny suggests that the main radiation events of the tribe Pseudodontini occurred during the Late Cretaceous to the Eocene, with the divergence between the new genus and Monodontina placed in the Miocene. The discovery of new freshwater mussel taxa in this study highlights the importance of the Mekong River Basin as one of the world’s biodiversity hotspots for freshwater fauna.

scholarly journals OPTIMIZATION OF THE RECIPES OF FORCEMEAT PRODUCTS ON THE BASIS OF PROCESSED FRESHWATER MUSSELS

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
M. Holovko ◽  
T. Holovko ◽  
А. Gelikh ◽  
M. Zherebkin
Keyword(s):  
Central Composite Design ◽  
Profile Analysis ◽  
Freshwater Mussels ◽  
Freshwater Mussel ◽  
Regression Equation ◽  
Daily Consumption ◽  
Organoleptic Evaluation ◽  
Significance Level ◽  
Graphic Data ◽  
Central Composite

This article is devoted to the optimization of the formulations of mincemeat products (cutlets) based on the semi-finished product from the freshwater mussel of the genus Anodonta. Recipe of this semi-finished product that can be introduced into the composition of different groups of dishes and culinary products has been developed. The article presents the model developed of optimisation of the recipe composition of polycomponent systems according to the optimum daily consumption of protein, fats and carbohydrates, with the classical cutlet technology as an example. In the course of the research, a universal model of an orthogonal central composite design to optimize forcemeat products was developed based on the criterion of a balance of the basic nutrients. The orthogonal central composite design is described in detail with four (n) factors of the optimization of the formulations of forcemeat products, and the homogeneity of the dispersion is confirmed, using Cochran’s C test at the significance level of x (0.05). The significance of the statistical model and the reliability of the regression equation were determined with an F-test. An organoleptic evaluation of the composition of each formulation of forcemeat products on the basis of processed freshwater mussels was made during the experiment by analytical methods – the qualitative method and the developed profile analysis method according to a point scale. The obtained results were presented in the form of a 3D model constructed using the least-squares smoothing method. After the graphic data obtained and the results of the direct measurements had been studied and the regression equation interpreted, we determined that the optimum composition of forcemeat products based on the processed freshwater mussel was the sample having the ratio of proteins, fats, and carbohydrates 1:1.03:4.18, which is the closest to the optimum ratio (1:1:4), and the organoleptic rating 14.25. Besides, basing on formulation 21 developed by us, we have determined the content of minerals, in particular Ca, P, Mg, Fe, I2, in one portion.

scholarly journals Novel Molecular Resources to Facilitate Future Genetics Research on Freshwater Mussels (Bivalvia: Unionidae)

Data ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 65
Author(s):  
Nathan A. Johnson ◽  
Chase H. Smith
Keyword(s):  
Sequence Variation ◽  
Freshwater Mussels ◽  
Freshwater Mussel ◽  
Pcr Primers ◽  
Molecular Data ◽  
Protein Coding ◽  
Genetics Research ◽  
Haplotype Networks ◽  
Phylogenetic Informativeness ◽  
Nuclear Loci

Molecular data have been an integral tool in the resolution of the evolutionary relationships and systematics of freshwater mussels, despite the limited number of nuclear markers available for Sanger sequencing. To facilitate future studies, we evaluated the phylogenetic informativeness of loci from the recently published anchored hybrid enrichment (AHE) probe set Unioverse and developed novel Sanger primer sets to amplify two protein-coding nuclear loci with high net phylogenetic informativeness scores: fem-1 homolog C (FEM1) and UbiA prenyltransferase domain-containing protein 1 (UbiA). We report the methods used for marker development, along with the primer sequences and optimized PCR and thermal cycling conditions. To demonstrate the utility of these markers, we provide haplotype networks, DNA alignments, and summary statistics regarding the sequence variation for the two protein-coding nuclear loci (FEM1 and UbiA). Additionally, we compare the DNA sequence variation of FEM1 and UbiA to three loci commonly used in freshwater mussel genetic studies: the mitochondrial genes cytochrome c oxidase subunit 1 (CO1) and NADH dehydrogenase subunit 1 (ND1), and the nuclear internal transcribed spacer 1 (ITS1). All five loci distinguish among the three focal species (Potamilus fragilis, Potamilus inflatus, and Potamilus purpuratus), and the sequence variation was highest for ND1, followed by CO1, ITS1, UbiA, and FEM1, respectively. The newly developed Sanger PCR primers and methodologies for extracting additional loci from AHE probe sets have great potential to facilitate molecular investigations targeting supraspecific relationships in freshwater mussels, but may be of limited utility at shallow taxonomic scales.

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