oyster Articles
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Biokinetics and metallothionein‐like proteins response in oysters facing metal challenges in an estuary
Discovery of colored oysters in an estuary in Southern China raised questions on how these oysters could survive in such an unpredictable estuary. In the present study, we conducted a transplant experiment using oysters Crassostrea hongkongensis in the estuary to quantify the changes of metal biokinetics (cadmium and zinc) and the responses of metallothionein‐like proteins (MTLPs). Oysters in ...
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Depuration of metals by the green‐colored oyster Crassostrea sikamea
Green‐colored oysters are now found in Chinese estuaries due to their accumulation of metals (especially copper). In this study, we specifically quantified the depuration of eight metals (Ag, Cd, Co, Cr, Cu, Ni, Pb, and Zn) in green‐colored oysters (Crassostrea sikamea) collected from an estuary heavily contaminated by metals due to industrial effluent releases. The oysters were depurated ...
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Settlement Dynamics of the Encrusting Epibenthic Macrofauna in Two Creeks of the Caeté Mangrove Estuary (North Brazil)
Abstract The epibenthic encrusting fauna of 2 creeks of the Caeté mangrove estuary, northern Brazil, was studied over a 13 month period using collectors fixed at 2.5 and 3.5 m above the creek bottom and in which upper and lower sides of ceramic and wooden panels were used as settlement substrates. The number of individuals of the most abundant organisms (barnacles, oysters and mussels) settling ...
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Investigating the effect of storage temperature and hot–water treatment on the microbial dynamics in edible oyster (Saccostrea cucullata)
Oysters are an important sea food all over the world apart from shrimp and crabs. They are usually sold as a live product and can be stored for several weeks before consumption. Temperature abuse during oyster post–harvest handling may allow multiplication of natural spoilage microflora as well as pathogens, which is a potential threat to consumers and/or compromising product quality. In this ...
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Improving management support tools for reintroducing bivalve species [Eastern Oyster (Crassostrea virginica Gmelin)] in urban estuaries
Successful reintroduction of ‘ecologically extinct’ bivalve species into anthropogenically impaired urban estuaries is problematic when employing existing management tools used in estuaries where bivalves are present (GIS‐based restoration models, expanding existing shellfish beds, placement of shell substrate, physical oceanographic parameters). A significant management challenge is ...
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Project Oyster Case Study
Project Overview Oysters play an important role in maintaining balance in aquatic environments. Due to their method of ingesting food by filtering water around them, they act as living purifiers. In fact, they thrive on excess nutrients and algae that may be harmful to other organisms. This property makes them a viable natural solution to managing waterways affected by phytoplankton blooms caused ...
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Mushroom Learning Center Kolhapur
Now learn mushroom growing with Mushroom learning Center, Kolhapur We provide oyster mushroom training and Mushroom seeds as well. Mushroom Seeds are available at cheap rates 100 rs/Kg. Collect seeds in person or by parcel. All India Shipping. We also supply fresh mushrooms and dry mushrooms in India and International exports. Mushroom #Trainings conducted every two weeks. Mushroom Learning ...
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Bioavailability of purified subcellular metals to a marine fish
In this study, we took advantages of the supply of naturally contaminated oysters and investigated how the subcellular metal distribution and the metal burden in prey affected the transfer of metals to a marine fish, the grunt Terapon jarbua. The oysters Crassostrea hongkongensis with different contaminated histories were collected and separated into three subcellular fractions (metal‐rich ...
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Restoration of Some Parameters in the Development of Benthos After Reduction of Anthropogenous Loading in the Ecosystem of the Sevastopol Bay in the Black Sea
Research on benthic communities have been carried out in the Sevastopol Bay of the Black Sea for a hundred years. The anthropogenous influence began to have an effect already in the 20–30th. In this period, all oyster-banks were lost and the mussel-silt and mellina-silt communities have begun to degrade and were not found during almost seventy years in the Bay. The worst state of benthic ...
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Development of new methods to assess invertebrate immunology and immunotoxicology in aquaculture: oysters and lobsters as examples
In order to support healthy aquaculture, we developed assays to assess immune functions and their susceptibility to environmental conditions or toxicants. Flow cytometry allowed the rapid and quantitative analysis of oyster and lobster cell subpopulations and their functions (phagocytosis, peroxide production, natural killer cell-like activity and apoptosis). We demonstrated experimentally that ...
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Water Column Investigation at Kauai Sea Farm - Case Study
Project Details PRODUCT(S): miniDOT® Logger APPLICATION: Aquaculture, Salt Water PARAMETER: Dissolved Oxygen, Temperature LOCATION: Kauai, Hawaii ORGANIZATION: Kauai Sea Farm RECOGNITION: Dave Anderson, Production Manager Case Study Description Raising Clams and Oysters Nestled in the caldera of a dormant volcano in Kauai, Hawaii, Kauai Sea Farm uses this natural feature for ...
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Climate resilience (with oysters)
Earth’s rising temperatures mean more glacier melt, sea-level rise and severe weather, and this translates to heightened threats for coastline communities. In response, SCAPE Landscape Architecture — powered by President Obama’s Rebuild by Design Initiative — has proposed an innovative way to protect coastlines that also promotes biodiversity, environmental education and ...
By Ensia
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Assessing the risk to green sturgeon from application of imidacloprid to control burrowing shrimp in Willapa Bay, Washington. I: Exposure characterization
Willapa Bay and Grays Harbor, Washington comprise the largest region of commercial oyster cultivation on the Pacific Coast. The activities of two species of burrowing shrimp impair growth and survival of oysters reared on the intertidal mudflats. In order to maintain viable harvests, the oyster growers have proposed controlling the shrimp by applying the insecticide imidacloprid onto harvested ...
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Rhodomonas
Have you ever come across a beautiful reddish (and pink in my opinion) coloured algae? That algae may have been rhodomoas, one of our favourites! Why use Rhodomonas for feeding oysters and other aquatic animals? Particle Size Rhodomonas algae have medium cell sizes, which makes them an ideal food source for oyster larvae. The cells are well-suited for the small filtering apparatus of young ...
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Shellfish culture in Chile
The present situation and future projections regarding shellfish culture in Chile are analysed. Production has increased exponentially, mainly of the 'Chilean mussel' Mytilus chilensis (Hupe) and the 'northern scallop' Argopecten purpuratus (Lamarck). At present, seven species are cultured, two of which were introduced. The total invertebrate production corresponding to cultures has increased ...
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Rainfall and river flows are predictors for β-glucuronidase positive
Escherichia coli accumulation in mussels and Pacific oysters from the Dart Estuary (England)Rainfall and river flows are environmental variables influencing the microbial status of bivalve mollusc harvesting areas. This study investigated spatial and temporal relationships between rainfall, river flows and concentrations of Escherichia coli in mussels (Mytilus spp.) and Pacific oysters (C. gigas) from three harvesting areas in the Dart Estuary over the period 1996–2009. Mussels growing ...
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Effect of chronic exposure to zinc in young spats of the Pacific oyster (Crassostrea gigas)
The marine coastal environment is exposed to a mixture of environmental pollutants of anthropogenic origin, resulting in chronic low concentrations of contaminants. As a consequence, most coastal marine species are exposed to low doses of such pollutants during their entire life. Many marine species live for years in their natural environment, whereas they do not under laboratory exposure ...
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Plasma cholinesterase activity as a biomarker for quantifying exposure of green sturgeon to carbaryl following applications to control burrowing shrimp in Washington State
Willapa Bay (Washington State, USA) has been one of the rare intertidal locations where large‐scale pesticide applications occur. Until recently, carbaryl was applied to control burrowing shrimp that decrease commercial oyster productivity. The Bay is critical habitat for green sturgeon (Acipenser medirostris), an anadromous species listed as threatened under the Endangered Species Act. ...
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Assessing the risk to green sturgeon from application of imidacloprid to control burrowing shrimp in Willapa Bay, Washington. II: Controlled exposure studies
The activities of two species of burrowing shrimp have a negative impact on the growth and survivalofoysters reared on intertidal mudflats in Willapa Bay and Grays Harbor, Washington. In order to maintain viable harvests, oyster growers proposed the application of the neonicotinoid insecticide imidacloprid onto harvested beds for the control of burrowing shrimp. In test applications, water ...
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Nature and humans, together again
Humans have been “framed out of the picture” when it comes to documenting nature, says Conservation International executive vice president and senior scientist M. Sanjayan in the opening of a new series, “EARTH A New Wild,” which premiers Feb. 4 on PBS. Sanjayan and producer David Allen — “probably the finest natural history filmmaker out there today,” ...
By Ensia
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