aquaculture net cage Articles

  • Simulations of nutrient emissions from a net cage aquaculture system in a Brazilian bay

    Hydrodynamics and transport simulations were conducted with the modeling software TELEMAC-2D on Icó-Mandantes bay, a branch of the Itaparica reservoir. The bay has a maximal operational water level amplitude of 5 m and is suffering from eutrophication and algae bloom. Therefore, we investigated low and high water level scenarios with two different high resolution meshes, with the purpose to ...


    By IWA Publishing

  • Open sea-based Aquaculture case study

    Salmon farming is a multi-billion dollar global industry facing considerable difficulties posed by growing pressure from environmental regulatory bodies. Because marine organisms grow on and “foul” synthetic nets, oxygen available to fish is reduced and infectious diseases and parasites can spread among the fish. A test to study the reduction of fouling formation on netting of fish ...


    By LG Sonic

  • The Scoop on Shellfish Aquaculture

    The centerpiece of many culinary gurus''stunning' dishes, a shellfish’s journey often begins on a farm. Found on the coastal shores or in freshwater lakes, you’ll discover suspended shellfish aquaculture systems. Fixed on ropes, plastic trays or in mesh bags, these shelled, aquatic invertebrates are raised in a controlled environment ...


    By Deep Trekker Inc.

  • ASM proven sonic wave technology remove filamentous algae of fishnets in a environmentally way!

    Fish net cleaning is one of the biggest costs in marine aquaculture management is weed growth on fish cages and the labour and plant costs devoted to cleaning nets is significant. Considerable effort and research has been devoted by ASM to this particular challenge and recent technological advances have been applied. Also,diseases are easily spread among farmed fish due to the ...

  • The impacts of organic matter on the distribution and methylation of mercury in a hydroelectric reservoir in Wujiang River, Southwest China

    In order to understand the impacts of organic matter on geochemical process of Hg in hydroelectric reservoir, spatial and seasonal distributions of total mercury (THg) and methylmercury (MeHg) both in solid and liquid phases of sediment cores were investigated in Wujiangdu Reservoir (WJD) in Guizhou province, China. Four sampling sites with different intensities of cage aquaculture activities ...


    By John Wiley & Sons, Ltd.

  • Biological water treatment in aquaculture by means of “Mutag BioChip™ RAS Process“

    Aquaculture or fish farming means the artificial breeding and raising of aquatic creatures. They include fish as well as crustaceans and shellfish, which are raised and stocked under controlled conditions by using techniques and technologies offering an increased level of productivity which cannot be realized under natural conditions. Due to the increased demand for freshly caught fish and ...


    By Multi Umwelttechnologie AG

  • Underwater Unmanned Aerial Vehicle-Future of Marine Fisheries

    First of all, there is huge market space for underwater drone. In terms of Fisheries and aquaculture, China's aquaculture area is 8465,000 hectares, of which 27.38% is mariculture area and 72.62% is freshwater aquaculture area. There are 32,000 aquaculture farms in China, covering an area of 10 million hectares. It is necessary to check the temperature, salinity, PH value, dissolved oxygen of ...

  • Impact of endosulphan and cypermethrin mixture on amphibians under field use for biotech soya bean production

    This study presents results at a local scale of the impact of pesticide aerial applications containing a mixture of endosulphan and cypermethrin on anurans assessed by means of field evaluations. Additionally, effects were compared with laboratory toxicity tests in standardised conditions. Field assessment with native population allowed the detection of dead anuran larvae of the species present ...


    By Inderscience Publishers

  • Salmon aquaculture could incorporate seaweed and sea urchins to reduce nitrogen enrichment

    Farming fish together with seaweed and other species could help improve the sustainability of aquaculture and reduce pollution. A new study provides a tool for designing sustainable fish farming systems and calculates their potential to recycle waste. An example of a salmon farming system incorporating seaweed and sea urchins could reduce nitrogen releases to the environment by 45%. Over half of ...

  • Modern strains put Lake Victoria in critical condition

    Pollution and overfishing in Lake Victoria have become so severe that scientists believe they threaten the health and livelihoods of millions of East Africans.   And researchers in the three countries bordering the ...


    By SciDev.Net

  • CO2 Removal and Stripping Column Ventilation Rate at Bell Aquaculture

    Monitoring and controlling CO2 level in Recirculating Aquaculture Systems (RAS) is crucial not only for fish health but it is used increasingly for efficient management. Under supervision of Steve Summerfelt, a joint project has studied costs savings with optimizing ventilation based on CO2 continuous monitoring. The CO2 probe used in that project came from ...


    By Franatech GmbH

  • Ghana Fish Farming and Fish Feed Production

    There are two main ways to obtain feed for fish farming in Ghana: locally produced feed and imported feed. However, fish feeds locally produced are in bad quality as most of them are not extruded. Imported feed is appropriately 30% more expensive than locally produced. So importation is not a quick fix. On average the costs for Tilapia farming in Ghana consist of 70% of the feed cost. Therefore, ...

  • Pacific fisheries need tech to track climate impact

    Climate change could benefit some Pacific fisheries, but tracking the success of adaptation needs effective monitoring, says Johann Bell. Climate change could derail plans by Pacific Island countries and territories (PICTs) to use ...


    By SciDev.Net

  • Measurement of the amount of DissolvedOxygen

    Dissolved Oxygen (DO) is the term used for the measurement of the amount of oxygen dissolved in a unit volume of water. In water quality applications, such as aquaculture (including fish farming) and waste water treatment, the level of DO must be kept high. For aquaculture if the DO level falls too low the fish will suffocate. In sewage treatment, bacteria decompose the solids. If the DO ...

  • Pasture Trial – Waroona (2014/2015) - Case Study

    At Waroona in the Peel region of Western Australia in 2014, 12 by 1m square wire cattle cages were placed at random to evaluate the effects of Hibrix pasture treatment combined with 50kg/ha of super phosphate versus the growers standard fertiliser usage of 100kg/ha of super phosphate. The Hibrix treated plots produced significantly higher amounts of dry matter without any reduction in pasture ...


    By NW Solutions

  • Estimating preferences for non-market attributes of aquaculture and sustainable seafood production: methods and empirical applications

    If aquaculture is to promote sustainable seafood production, the public must be willing to accept associated tradeoffs. Tradeoffs may include impacts on a variety of environmental and social attributes. Public preferences for aquaculture may differ according to type of operation, species, region, and other factors. Stated preference methods can assist policymakers in designing balanced, ...


    By Inderscience Publishers

  • Processing and Application of Floating and Sinking Fish Feed

    In virtue of mature processing technology and unique advantages in fish farming, extruded floating and sinking fish feed has become the most ideal fish feed in modern aquaculture industry. With the further development of fish farming industry, extruded fish feeds have obtained more and more wide applications in virtue of unique advantages including high nutrient, good palatability, strong ...


    By Fanway Fish Feed Machinery

  • Mangrove Capital

    This paper introduces Mangrove Capital; a programme conceived by Wetlands International and partner organisations, that aims to bring the values of mangroves to the fore and provide the knowledge and tools necessary for the improved management of mangrove forests. The project will enable governments, private sector organisations and local communities in Indonesia to manage mangroves, so that they ...


    By Wetlands International

  • Swaziland: Becoming self-supporting with the use of egg production - Case Study

    Two poultry houses, 5,000 laying hens and 1,5 million eggs annually make a difference in Swaziland, a country plagued by drought and Aids. With the support of the international egg industry, a poultry company was founded within the development of 'Project Canaan'. It contributes to the project’s mission: becoming self-supporting with the use of agriculture. The poultry houses are equipped ...


    By Big Dutchman

  • Cultivation of microalgae (Oscillatoria okeni and Chlorella vulgaris) using tilapia-pond effluent and a comparison of their biomass removal efficiency

    The uptake of dissolved nutrients by microalgae is the primary way to remove nitrogen in aquaculture systems. Many authors have studied the use of microalgae to treat wastewater from aquaculture. However, excessive microalgae accumulation may cause high levels of organic matter and suspended solids in the final effluent. Thus, an efficient way to remove excess algae is needed in wastewater ...


    By IWA Publishing

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