C-MAX BIO SCIENCES is producing the FREE products for th safetyand health of aquaculture industry.
WATER TREATMENT IN AQUACULTURE(SOLID REMOVAL)
The metabolic activity involved in converting fish feed to fish flesh produces waste products. These consist of suspended solids (SS) and dissolved nutrients. Suspended solids amount to approximately 25% of the feed used, on a dry matter basis. The principles involved are applicable to both flow-through and recirculation farms. Removal of suspended solids from flow-through fish farms has different requirements from other water treatment processes such as those handling sewage, pig farm effluent or dirty water from a vegetable processing plant: concentrations of pollutants in fish farm effluent are relatively low and flow volumes are relatively high. These large water flow volumes require careful choice of systems to control costs
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ORIGIN OF SUSPENDED SOLIDS
In a farm, suspended solids and dissolved nutrients originate from:
• Uneaten feed
• Fish metabolism producing faeces
• Solids carried into the farm with the flow from the external water source
• Growth of micro-algae and bacteria
FACTORS EFFECTING PRODUCTION OF SUSPENDING SOLIDS
Production of suspended solids within a fish farm is affected by a range of factors, including:
• Feed quality
• Rate of feeding
• Feeding method
• Water exchange rate - Tank hydrology
• Fish stocking density
• Dissolved oxygen level
• Efficiency of farm management and skills of personnel
The amount of uneaten feed can be reduced by a careful feeding regime that provides the correct amount of feed, at the time the fish require it, and by husbandry that provides water quality suitable for feed conversion. Substantial improvements in feed conversion ratios, and reductions in the faeces generated, have been achieved by improving fish diets; for example, by using ingredients with high digestibility and diets that are matched to the requirements of the fish species. Selection of feed ingredients can influence the physical stability of faeces on their journey to the point where they are removed by sedimentation or filtration.
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| Packaging Details | 200 kg Drum |
| Function | Biocides |
| Grade Standard | Industrial Grade |
| Physical State | Powder |
| Usage/Application | Pharmaceuticals |
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| Usage/Application | Surface Disinfectant |
| Packaging Type | Bottle |
| Physical State | Liquid |
| Shelf Life | 1 year |
| Country of Origin | Made in India |
Like humans and other animals, fish suffer from diseases and parasites. Fish defences against disease are specific and non-specific. Non-specific defences include skin and scales, as well as the mucus layer secreted by the epidermis that traps microorganisms and inhibits their growth. If pathogens breach these defences, fish can develop inflammatory responses that increase the flow of blood to infected areas and deliver white blood cells that attempt to destroy the pathogens.
Specific defences are specialised responses to particular pathogens recognised by the fish's body, that is adaptative immune responses.[3] In recent years, vaccines have become widely used in aquaculture and ornamental fish, for example vaccines for furunculosis in farmed salmon and koi herpes virus in koi.[4][5]
Some commercially important fish diseases are VHS, ich and whirling disease.
ContentsAll fish carry pathogens and parasites. Usually this is at some cost to the fish. If the cost is sufficiently high, then the impacts can be characterised as a disease. However disease in fish is not understood well.[6] What is known about fish disease often relates to aquaria fish, and more recently, to farmed fish.
Disease is a prime agent affecting fish mortality, especially when fish are young. Fish can limit the impacts of pathogens and parasites with behavioural or biochemical means, and such fish have reproductive advantages. Interacting factors result in low grade infection becoming fatal diseases. In particular, things that causes stress, such as natural droughts or pollution or predators, can precipitate outbreak of disease.[6]
Disease can also be particularly problematic when pathogens and parasites carried by introduced species affect native species. An introduced species may find invading easier if potential predators and competitors have been decimated by disease.[7]
Pathogens which can cause fish diseases comprise:
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GV Rao (CEO)
C-Max Bio Sciences
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