marine fish Articles
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Calculation of radiation doses to human organs from consumption of marine fish
In the present work, radiation doses are estimated from the analysis of 40K, 137Cs, 226Ra and 228Ra radionuclides in marine fish of the Bay of Bengal, accumulated in ten different human organs: red marrow, lung, thyroid, lower large intestine, upper large intestine, small intestine, breast, stomach, gonads and bone surface. The lowest equivalent dose is calculated in the thyroid as 2.7×10−3 µSv/y ...
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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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Predicting the effects of copper on local population decline of two marine organisms, cobia fish and whiteleg shrimp, based on avoidance response
Fry of the marine fish Rachycentron canadum (cobia) and larvae of the estuarine shrimp Litopenaeus vannamei (whiteleg shrimp) were exposed to a copper gradient which ranged from 0.20 to 1.80 mg Cu/L for the experiments with cobia and from 0.10 to 1.0 mg Cu/L for the experiments with whiteleg shrimp. The experiments focused on the avoidance response to predict the population decline. Avoidance ...
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Effect of parasitic isopods in the marine fish Carangids malabaricus off Parangipettai coastal waters
The effect of parasitic isopods on the fish Carangids malabaricus was studied. The reduction in gill raker count and gill surface area was observed as a function of infestation. The maximum reduction in respiratory surface area was observed in the first gill arch and the minimum in the third gill arch. Infested fish had extremely pale gills, indicating severe anaemia. Gill rakers were seriously ...
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Indonesia Fishery and Aquaculture Profiles
Indonesia is the world’s largest archipelagic State with some 17 508 islands (of which 6 000 are inhabited), and 54 716 km of coastline, and the world’s fourth most populous nation (247.5 million). In 2012, Indonesia’s fishery production reached approximately 8.9 million tonnes, of which inland and marine catch accounted for about 5.8 million tonnes and aquaculture 3.1 million ...
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Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments
We performed feeding experiments to investigate mercury (Hg) isotope fractionation during trophic transfer and internal distribution of total Hg (THg) in marine fish upon exposure to natural seafood. Young‐of‐the‐year amberjack (Seriola dumerili) were fed with either blackfin tuna (Thunnus atlanticus) (2647 ng/g THg) or brown shrimp (Farfantepenaeus aztecus) (25.1 ng/g THg) for 80 and 50‐days, ...
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Hexabromocyclododecane in consumer fish from South China: Implications for human exposure via dietary intake
Levels of hexabromocyclododecane (HBCD) were determined in 12 consumer fish species from South China. The concentrations of the sum of HBCD diastereoisomers (ΣHBCD) ranged from nondetectable to 194 pg/g wet weight, with a detectable frequency of 70%. This was at the low end of the concentration range globally observed. Carnivorous fish species contained higher HBCD concentrations than herbivorous ...
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Transfer kinetics of perfluorooctane sulfonate (PFOS) from water and sediment to a marine benthic fish, the marbled flounder (Pseudopleuronectes yokohamae)
We investigated the kinetics of transfer of perfluorooctane sulfonate (PFOS) from water, suspended sediment, and bottom sediment, to a marine benthic fish, the marbled flounder (Pseudopleuronectes yokohamae). Fish were exposed in three treatments to PFOS in combinations of these exposure media for 28 days, and then depurated for 84 days. A major part (37%–66%) of PFOS in the fish was in the ...
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The Ecological Fishprint of Nations: Measuring Humanity’s Impact on Marine Ecosystems
In November, 2006, a prominent team of ecologists and economists issued this dire warning: if current fishing patterns continue, all major commercial fish species will suffer population collapses by 2048. In March 2005, the United Nations State of the World Fisheries and Aquaculture report stated that 7 of the top 10 marine fish species, accounting for about 30 percent of all capture fisheries ...
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Massive freshwater gains from producing food at sea
Water scarcity may be the most limiting factor to increasing world food production. Irrigation water is already overdrawn beyond sustainable levels and to increase reliance on rainfed agriculture is risky, even more so with climate change. However, to promote deliberate food production at sea, both fished and farmed, and both plant and animal, requires no freshwater or land. The thousands of ...
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Molecular evolution of haemoglobins of polar fishes
The Arctic and the Antarctic differ by age and isolation of the respective marine faunas. Antarctic fish are highly stenothermal, in response to stable water temperatures, whereas the Arctic ones are exposed to seasonal and latitudinal temperature variations. The knowledge of the mechanisms of phenotypic response to cold exposure in species of both polar habitats offers fundamental insights into ...
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Interdependence between pollution and fish resource harvest policies
This study presents a bio-economic model in which the dynamics of a fishery are affected by marine pollution both directly and indirectly. From the optimality analysis it can be seen that, as long as a contaminating sector exists near coastal areas, the policy on fish resource harvest will be more intense initially (when the environmental situation is better) and less intense in subsequent ...
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Benzoylurea pesticides used as veterinary medicines in aquaculture: Risks and developmental effects on non‐target crustaceans
Diflubenzuron and teflubenzuron are benzoylureas that are used in aquaculture to control sea lice. Flubenzurons have low toxicity to many marine species such as fish and algae, but by their nature are likely to have significant adverse effects on non‐target species such as crustaceans and amphipods. Although the exact mechanism of toxicity is not known, these compounds are thought to inhibit ...
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TYPES OF FISH FEEDS IN NIGERIA
INTRODUCTION Feed is a key factor in the success of fish farming. You need to ensure that the feed you use is appropriate for your farm, regardless of whether you are using local or foreign fish feeds.Like I always say to my clients, the choice of feed that you use for your fish depends on several factors.This article will discuss the different types of catfish feeds you can purchase and ...
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40 mil Pond Liner for Fish Pond Liner Projects in Philippine
Case Study Location: Philippine Products: 40 mil Pond Liner Application: Fish Pond Liner Projects Status Quo: The Philippines has more than 7,000 small islands surrounded by the sea, which is the main reason for the rich fishery resources. Unlike mineral resources, fishery resources in the sea can only be fixed. Because fish can swim, although marine fish usually have a habitual distribution in ...
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Puffed Floating Fish Feed Pellets Advantages
In order to improve the fish feed utilization of digestion and absorption, reduce the impact of feed pellets on the water environment, and improve the efficiency of aquaculture. Fusmar Machinery has obtained better economic and social benefits by improving the quality of fish feed machinery and processing technology. It is an important achievement to make fish feed pellets by the puffing process. ...
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Innovation the key behind success at Fusion Marine
It has been another busy year for Fusion Marine with the international fish farming sector ordering fish containment pens and a wide range of other specialist aquaculture systems from their diverse range. It has been an important year in other ways too with Fusion Marine moving its administration office from Barcaldine to new modern facilities at Malin House at the European Science Park in ...
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High-yield procedure of the pet feed pellet making machine
What's the definitive element for high-yield procedure of the pet feed pellet making machine? One of the most essential parts in the pet feed pellet making maker are journalism roller and also the die plate. However, the die plate is the most conveniently worn. Generally, when clients purchase a animal feed pellet making maker, they will acquire several collections of die plates to avoid the ...
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Project - Artificial Reefs
In collaboration with local fishermen, we are installing a network of simple, low cost artificial reefs to act as alternative fishing grounds, relieving pressure of over-fished reefs Our first artificial reef project was launched in October 2016 in the Bay of Ranobe. We install simple, affordable, and replicable artificial reefs on degraded patch reefs across the Bay of Ranobe to act as ...
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What is the outcome of floating fish feed making equipment?
What is the result of the floating fish feed making machine? Is it costly? For small farmers and also specific family farmers, a new drifting fish feed extruder maker can be taken into manufacturing, since several farmers can not make use of commercial power at home, and the majority of them generally make use of household illumination electrical energy. When picking drifting ...
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