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The water activity, a w, in a fish is defined as the ratio of the water vapour pressure in the flesh of the fish to the vapour pressure of pure water at the same temperature and pressure. It ranges between 0 and 1, and is a parameter that measures how available the water is in the flesh of the fish.
Antimicrobials in aquaculture. Antimicrobials destroy bacteria, viruses, fungi, algae, and other microbes. The cells of bacteria ( prokaryotes ), such as salmonella, differ from those of higher-level organisms ( eukaryotes ), such as fish. Antibiotics are chemicals designed to either kill or inhibit the growth of pathogenic bacteria while ...
Freshwater ecosystems are a subset of Earth's aquatic ecosystems. They include lakes, ponds, rivers, streams, springs, bogs, and wetlands. [ 1] They can be contrasted with marine ecosystems, which have a larger salt content. Freshwater habitats can be classified by different factors, including temperature, light penetration, nutrients, and ...
A metaphase cell positive for the bcr/abl rearrangement (associated with chronic myelogenous leukemia) using FISH. The chromosomes can be seen in blue. The chromosome that is labeled with green and red spots (upper left) is the one where the rearrangement is present. Fluorescence in situ hybridization ( FISH) is a molecular cytogenetic ...
A fish fillet processor processes fish into a fillet. Fish processing starts from the time the fish is caught. Popular species processed include cod, hake, haddock, tuna, herring, mackerel, salmon and pollock . Commercial fish processing is a global practice. Processing varies regionally in productivity, type of operation, yield and regulation.
Biofloc Technology. Biofloc technology (BFT) is a system of aquaculture that uses "microbial biotechnology to increase the efficiency and utilization of fish feeds, where toxic materials, such as nitrogen components, are treated and converted to a useful product, like proteins, for use as supplementary feeds for the fish and crustances." [ 1]
Aquacultural engineering. Aquacultural engineering is a multidisciplinary field of engineering and that aims to solve technical problems associated with farming aquatic vertebrates, invertebrates, and algae. [ 1] Common aquaculture systems requiring optimization and engineering include sea cages, ponds, and recirculating systems. [ 2]
Fish preservation is the method of increasing the shelf life of fish and other fish products by applying the principles of different branches of science in order to keep the fish, after it has landed, in a condition wholesome and fit for human consumption. [ 1][ 2] Ancient methods of preserving fish included drying, salting, pickling and smoking.