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Live fish can be transported by methods which range from simple artisanal methods where fish are placed in plastic bags with an oxygenated atmosphere, to sophisticated systems which use trucks that filter and recycle the water, and add oxygen and regulate temperature.
There are a number of techniques that have been or are used to tie up the available water or remove it by reducing the a w. Traditionally, techniques such as drying, salting and smoking have been used, and have been used for thousands of years. These techniques can be very simple, for example, by using solar drying.
Plant removal methods consist of: pulling by hand, mechanical cutting, cut and grinding, suction harvesting, rototilling, and hydro-raking. Mechanical cutting is the most common method of aquatic plant harvesting.
Ikejime (活け締め) or ikijime (活き締め) is a method of killing fish which maintains the quality of its meat. [1] The technique originated in Japan, but is now in widespread use.
An aquatic weed harvester, also known as a water mower, mowing boat and weed cutting boat, is an aquatic machine specifically designed for inland watercourse management to cut and harvest underwater weeds, reeds and other aquatic plant life.
Traditional fish traps, Hà Tây, Vietnam. Cage trap at Lembeh Strait, Indonesia. A fish trap is a trap used for catching fish and other aquatic animals of value. Fish traps include fishing weirs, cage traps, fish wheels and some fishing net rigs such as fyke nets.
Fish farming or pisciculture involves commercial breeding of fish, most often for food, in fish tanks or artificial enclosures such as fish ponds. It is a particular type of aquaculture, which is the controlled cultivation and harvesting of aquatic animals such as fish, crustaceans, molluscs and so on, in natural or pseudo-natural environments.
Fermentation is a method which attacks the ability of microbials to spoil fish. It does this by making the fish muscle more acidic; bacteria usually cease multiplying when the pH drops below 4.5. A modern approach, biopreservation, adds lactic acid bacteria to the fish to be fermented.
There are a number of techniques that have been or are used to tie up the available water or remove it by reducing the a w. Traditionally, techniques such as drying, salting and smoking have been used, and have been used for thousands of years. These techniques can be very simple, for example, by using solar drying.
Salted fish, such as kippered herring or dried and salted cod, is fish cured with dry salt and thus preserved for later eating. Drying or salting , either with dry salt or with brine , was the only widely available method of preserving fish until the 19th century.