Results 161 to 170 of about 29,153 (207)
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Cryptosporidium spp. in Freshwater Bivalves in Portugal
Journal of Eukaryotic Microbiology, 2006RYPTOSPORIDIUM spp. in water has been implicated inseveral human cryptosporidiosis outbreaks (Fayer 2004).Studies on Cryptosporidium oocysts in surface waters are madedifficult by the low concentrations of organisms present due todilution. Since bivalves are filter-feeders oocysts in suspended inwater can be removed by this filtration and the mollusc ...
Pedro C, Melo +5 more
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Sterols and their biosynthesis in some freshwater bivalves
Lipids, 1981AbstractA number of free sterols and sterol esters of three freshwater mussels was separated and identified. A slow rate of biosynthesisde novo of sterols was demonstrated inAnodonta cygnea. Injected cholesterol was found to undergo esterification, oxidation, Δ22‐dehydrogenation and C‐24 alkylation.
S, Popov +4 more
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Manganese Accumulation in Freshwater Bivalves
1991Marine carbonate sediments consist of carbonate skeletons such as coral and molluscan shell. Since these organisms uptake various chemical elements from environmental seawater and form calcium carbonate skeleton, the relation between trace element content of calcareous skeletons and environmental condition, and the estimation for the chemical natures ...
S. Yoshioka, M. Terai
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Infectious Diseases of Freshwater Mussels and Other Freshwater Bivalve Mollusks
Reviews in Fisheries Science, 2009Numerous species of freshwater mussels (order Unionoida) are imperiled in the wild, and unionoids and other freshwater bivalves are important components of many ecosystems. Freshwater mussels also are propagated in captivity for production of pearls and enhancement of wild populations.
JOHN M. GRIZZLE, CINDY J. BRUNNER
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The catalase of a freshwater bivalve
Canadian Journal of Zoology, 1970The catalase activity of various tissues of a freshwater mussel was studied. The concentration in the digestive gland is about three times that of the viscera and seven times that of mantle and muscular tissue. Semipurified digestive gland catalase has optimal activity at 10 °C and pH 7.8.
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Influence of Microplastics on Freshwater Bivalves (Review)
Inland Water BiologyAnthropogenic pollution of the aquatic environment with microplastics is one of the most urgent but least studied problems of modern ecotoxicology. The review, based on recent literature data, provides an analysis of studies in the field of absorption, bioaccumulation, and biological effects of microplastic exposure in freshwater bivalve molluscs ...
G. M. Chuikо +2 more
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Bivalve Impacts in Freshwater and Marine Ecosystems
Annual Review of Ecology, Evolution, and Systematics, 2018Bivalve molluscs are abundant in marine and freshwater ecosystems and perform important ecological functions. Bivalves have epifaunal or infaunal lifestyles but are largely filter feeders that couple the water column and benthos. Bivalve ecology is a large field of study, but few comparisons among aquatic ecosystems or lifestyles have been conducted ...
Caryn C. Vaughn, Timothy J. Hoellein
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Potassium Transport in the Freshwater Bivalve Dreissena Polymorpha
Journal of Experimental Biology, 1995ABSTRACT Potassium transport and blood ion composition were examined in the freshwater bivalve Dreissena polymorpha. Animals acclimated to artificial pondwater (APW, [K+]=0.05 mmol l−1) for 4 weeks gradually lost Na+ and Cl−, but the blood K+ concentration remained constant near 0.5 mmol l−1. Blood [K+] in D.
, Wilcox, , Dietz
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Ion Transport and Acid–Base Balance in Freshwater Bivalves
Journal of Experimental Biology, 1997ABSTRACT Blood acid–base and ionic balance in freshwater bivalves is affected by the relative activities of epithelial Na+ and Cl− transporters. In the unionid Carunculina texasensis, the Na+/H+ exchanger is the predominant epithelial transporter that affects acid–base state, while Cl−/HCO3− exchange is of lesser importance.
, Byrne, , Dietz
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