Showing results for: dead fish Articles
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Population dynamics of 15 fish species in Grand-Lahou lagoon (West Africa, Côte d’Ivoire)
This study described growth, mortality, recruitment patterns and exploitation rates of 15 fish species in Grand-Lahou lagoon (Côte d’Ivoire). Monthly length-frequency data collected from artisanal fisheries from November 2013 to October 2014 were analyzed with FiSAT software using the ELEFAN package to estimate the population parameters of fishes. Asymptotic values for total length ...
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Use of sea water and hydraulic conditions. Potential cause of Mortality by Metals and Hydrogen Sulfide in Recirculation Fisheries
The traditional conception in Chile of the toxic effect of metals on cultured fish tends to weigh heavily on incoming freshwater in open flow fish farms as the major responsible for mortality in early stages of development in salmon species. This approach is mainly based on two conditions that refer to freshwater quality in Chile, and to the dilutive effect of recirculation fish stocks when a ...
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Fathead Minnow response to broad‐range exposure of β‐sitosterol concentrations during life cycle testing
β‐sitosterol concentration in pulp and paper mill effluents is typically greater than other phytosterols, and has been shown to cause a variety of effects in fish. We exposed Fathead Minnow (Pimephales promelas) to low (22 ± 0.93 µg/L), medium‐low (70 ± 2.1µg/L), medium‐high (237 ± 5.5 µg/L), and high (745 ± 16.2 µg/L) concentrations of β‐sitosterol; and a negative (water), positive (ethynyl ...
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Aquaculture case study
Customer: USDA-ARS Catfish Genetics Research Unit,USA Casey C. Grimm from the Southern Regional Research Centre New Orleans, USA. This research was executed by Ph.D. Paul V. Zimba from the USDA-ARS Catfish Genetics Research Unit, USA and Casey C. Grimm from the Southern Regional Research Centre New Orleans, USA, utilizing the LG Sonic ultrasound technology in channel catfish production. An ...
By LG Sonic
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Case study: Fish farm
OverviewKfar Ruppin is one of the leading fish farming coops in Israel. Recent restrictions on water consumption and discharge have led the coop to consider semi intensive closed loop fish ponds. The main objectives in closed loop fish farming applications are prevention of Ammonia and Nitrite accumulation, and removal of suspended solids. Usually, the investment in a closed water cycle system ...
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Dead pigs found in Huangpu River hit 2,800
The number of dead pigs found in Shanghai’s Huangpu River has increased to 2,800 after an additional 1,600 corpses were fished out. Labels pinned in the ears of the pigs for tracing purposes have indicated they come from the upper reaches of Jiaxing City in east China’s Zhejiang Province. Local media in the Jiaxing region has reported residents dumping dead pigs into the river since ...
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Continuous DO Data Shifts Paradigm for Aquaculture Production
Continuous DO Data Shifts Paradigm for Aquaculture Production Overview Titikaka Trout Peru is advancing aquaculture production in Lake Titicaca, Peru, through continuous monitoring of dissolved oxygen data, a strategy never before practiced in the region. Challenge At 3,812 meters (12,507 feet), Lake Titicaca is one of the highest-elevation lakes in the world. With a surface area of 8,372 ...
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Chitin/Chitosan as an Immunostimulant - Case Study
Chitin is component of several crustacean and insect carapace. It is an energy source for several species which can degrade chitin through special enzymes. Disease control, profilaxis and eradication are based on the use of vaccines and chemiotherapeutical substances. But there are a number of pathologies that have no known cure. There are for example, the case of Piscirichettsiosis in Chilean ...
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Can Fish be Happy?
The sixth installment in the series “Happy Fish - How Aquaculture Operators are Growing Better Fish.” A curious question that we have been asking is a concept that we’re thinking about in regards to fish – can fish be happy or show signs of happiness? Both RAS systems and Net Pen operations aim to raise the best and highest quality fish to fetch the greatest market value. ...
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Nets That Save Fish - Ocean bycatch isn’t inevitable — it’s a design challenge.
Six years ago, the Norwegian coast guard filmed a Scottish fishing vessel riding gray swells, dumping 5 metric tons of dead fish back into the North Sea. Over the European Union catch quota, and so unable to keep all the fish they’d caught, the fishermen had to ditch some. To the Norwegians, who aren’t part of the EU and hold a strict discards ban, the waste was shocking. When this ...
By Ensia
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Common Causes of Fish Kills in Your Pond
What Killed My Fish? The first question everyone has when they notice fish floating in open water or washed up along the bank is: what killed my fish? The most common causes of fish kills are oxygen depletion, algal blooms (could deplete oxygen or be toxic), pesticide toxicity and disease. By far, the most common cause of fish kills is oxygen depletion in lakes or ponds. There are two general ...
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Scottish Sea Farms - Case Study
Addfield supply a Mobile Aquaculture machine that enables the farming of fish to be sustainable. The Challenge The challenge was to build a bespoke aquaculture incineration machine for Scottish Sea Farms Being located in Northern Scotland means that the working environment is arduous and challenging so Scottish Sea Farms need their equipment to withstand testing climates. Incineration is ...
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Aquasend Customers Review Real-Time Monitoring Benefits
Oxygen is one of the most important assets to each aqua farm. Protecting it is critical. These are quotes taken directly from farmers regarding oxygen. "Dissolved oxygen is the most critical water quality parameter in warmwater aquaculture. As we feed fish more and more, the dissolved oxygen will drop lower and lower in the early morning hours. The warmer the temperature, the faster it will drop. ...
By Aquasend
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What Are Benefits Of Fish Farming Business?
Fish farming is basically the commercial raising of fish in tanks and ponds for food production. Commercial fish farming has established profitable commercial opportunities worldwide. It is well known that fish is an important source of food and protein, so the demand and price of fish and fish-related products have increased rapidly along with population growth. Pellet making machine can make ...
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Aquasend Beacon® at Global Organic Farm, Inc.
Real-Time Data, Real-Time Control Deploying an Aquasend Beacon® is a great first step toward taking control of the water quality in aquafarm ponds and, by extension, the health of the fish. In order to have a successful farm you have to protect your most important asset: your water quality. Designed for outdoor aquafarm pond use, the Beacon measures dissolved oxygen (DO) and temperature (T), the ...
By Aquasend
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Common Fish Diseases and Caused Reasons
There are literally hundreds of afflictions that can effect the health of farm fish. The most common maladies seen in home aquaculture production are usually either bacterial, parasitic, or viral diseases in origin. Fungal infections are also sometimes seen, and occasionally physical ailments. Common Fish Diseases & Symptoms in Freshwater Cultured Fish 1. Bacterial Disease Bacterial ...
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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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Plastic Fish Pond Liners for Aquaculture Project in Korea - Case Study
Plastic fish pond liners are often HDPE geomembrane liners which have low permeability coefficient, anti-permeability and isolation performance, so plastic fish pond liners are widely used in aquaculture water DAMS, highways, railways, airports, tunnels, chemical mining, landfill and other fields. The thickness specification of widely used plastic fish pond liners isoften 0.2~3.0mm, the ...
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