Showing results for: fishery Articles
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Understanding biofloc in aquaculture production systems (Part 1)
Since 2009, protein from aquaculture production has surpassed that of fisheries for the first time in history. Aquaculture is simply a water-based agriculture with a long history. It is an essential source of nutrition, as well as a source of income for large number of communities. Aquaculture is here to stay, despite opposition to aquaculture from segments of the NGO community and commercial ...
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Effects of different management regimes on mangrove ecosystem services in Java, Indonesia
This new report, published by Wageningen University and Wetlands International, seeks to fill a significant gap in mangrove ecosystem service estimates. While several studies have sought to measure and value the ecosystem services provided by mangrove ecosystems in general, this new piece of research has for the first time conducted separate evaluations for zones that are characterised by ...
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Nechako White Sturgeon Conservation Centre - Case Study
The Freshwater Fisheries Society of BC developed the Nechako White Sturgeon Conservation Centre to try to prevent extinction of this endangered species. Wild caught brood fish are held in the facility until spawning is complete. Controlled family groupings of young sturgeon are hatched in McDonald jars and reared for one year, first in 0.5 m3 and 1.5m3 combi tanks, then 8 m3 tanks before release. ...
By PR Aqua, ULC
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Recirculatory Aquaculture System (RAS)
Introduction: Recirculation Aquaculture System (RAS) is a generation in which water is recycled and reused after filtration and elimination of suspended rely and metabolites. The approach is used for highdensity lifestyle of diverse species of fish utilising minimal land place and water. It is an in depth approach (better densities and greater rigorous management) than different aquaculture ...
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The Importance of Water Quality in Fish Farming
Due to the increasing global demand for fish as a source of food, around half of the world’s fish supply is now farmed artificially rather than caught through capture fisheries in natural environments. Aquaculture has been the fastest growing sector of the global food industry since the 1970s, and has predominately taken place in the Asia-Pacific region. Water quality management in ...
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Water budgets for freshwater fish ponds of Andhra Pradesh, Orissa and West Bengal, India
The water budgets for some aquaculture systems in three states viz. Andhra Pradesh, Orissa and West Bengal were determined in the present study. The average evaporation and seepage loss from the aquaculture ponds throughout the year in Cuttack, Kendrapara, Jajpur, and Puri districts of Orissa were 164 ± 8.3 and 73 ± 16.5 cm, respectively; 152 ± 10 and 90 ± 16 cm, respectively, in South and ...
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The First BioFishency Mini RAS at Sultan Fish Farm, North India!
The First BioFishency Mini RAS was installed on May 2016 at Sultan Fish Farm, North India. The system can grow up to 12 tons Barramundi per year. The Mini RAS includes the inovative BioFishency water treatment system and 6 fish tanks. ...
By BioFishency
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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 ...
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Ideal Fish- Case Study
Ideal Fish is the first commercial facility to raise branzino (European Sea Bass) in the United States. PR Aqua designed this facility for integration into an existing industrial ...
By PR Aqua, ULC
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Performance of an
in-situ rotating biological contactor in a recirculating aquaculture systemThe start-up and activation of a nitrifying rotating biological contactor (RBC) and its performance inside a culture tank of rainbow trout were studied. First, in a lab-scale operation, the system was fed with a synthetic medium containing a high ammonia concentration (567 mg NH4+-N L−1) and operated at a high hydraulic retention time (HRT) (6.5 days) to minimize the wash-out of the biomass and ...
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Transgenic fish are ready for us. Are we ready for them?
After decades of regulatory and legal challenges, AquaBounty aims to bring genetically engineered salmon to U.S. and Canadian markets next year. On a hill above the cold waters around Prince Edward Island, technicians painstakingly create fertilized Atlantic salmon eggs that include growth-enhancing DNA from two other fish species. The eggs will be shipped to ponds in the high rainforest of ...
By Ensia
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Emerging Trends in the Aquaculture Industry
The first installment in the series “Happy Fish – How Aquaculture Operators are Growing Better Fish.” It’s important for any aquaculture business to stay on top of the leading industry trends in order to be successful. However, it can be daunting to to know where to start or who to turn to for advice. After all, time and money is a precious ...
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Pilot scale testing of advanced oxidation processes for degradation of geosmin and MIB in recirculated aquaculture
The presence of geosmin and 2-methylisoborneol (MIB) in recirculated aquaculture systems has a significant negative impact on the fish production due to poor flavour quality of produced fish and increased risk of rejection by fish processers. Advanced Oxidation Processes has a high potential for removal of geosmin and MIB in water and in this study UV/H2O2 and UV/O3 has been tested in pilot scale ...
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Planning a RAS project? Be Aware of These Unique Managerial Challenges
Interest in Recirculating Aquaculture System (RAS) land-based fish production technology is increasing as its benefits are becoming more widely recognized. As a wave of new projects come to fruition, it becomes critically important to address the range of managerial challenges that might arise for those developing these projects. Experience and Industry Specialization One of the key elements ...
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Model of an aquaponic system for minimised water, energy and nitrogen requirements
Water and nutrient savings can be established by coupling water streams between interacting processes. Wastewater from production processes contains nutrients like nitrogen (N), which can and should be recycled in order to meet future regulatory discharge demands. Optimisation of interacting water systems is a complex task. An effective way of understanding, analysing and optimising such ...
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A new reactor for denitrification and micro-particle removal in recirculated aquaculture systems
A ‘membrane-denitrification’ reactor (MDR) was developed and tested in a semi-technical recirculation aquaculture system in comparison to a double – without MDR – as reference system. The MDR consisted of a reactor with an ultrafiltration membrane unit for removal of micro-particles (e.g. sludge flocs, bacteria and parasites). Specific carrier material provided surfaces for biofilm growth in ...
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New technology to breed healthier fish faste
Blue Unit in collaboration with SDU Sønderborg is developing new technology to secure a stable water quality in recirculation fish farms and create optimal conditions for fish to grow. The partnership was a result of a match made by Odense Robotics in connection with the innovation programme “AutomationsBoost”. Blue Unit and SDU Sønderborg are currently collaborating ...
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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 ...
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Current Challenges and Trends in RAS Systems
The third installment in the series “Happy Fish – How Aquaculture Operators are Growing Better Fish.” This segment talks about some of the current trends and challenges in Recirculating Aquaculture Systems, also known as RAS Systems. Recirculating aquaculture systems (RAS) is one of the developing technologies for the production of fish for food, feed, and other products. The ...
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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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