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Scientists carrying out a population and species survey using electrofishing equipment. Electrofishing is a fishing technique that uses direct current electricity flowing between a submerged cathode and anode. This affects the movements of nearby fish so that they swim toward the anode, where they can be caught or stunned.
Electric pulse fishing. The pulse trawl: electrodes in the tow direction of the gear cause an electric field above the seabed, which stimulate the flatfish so they come up toward the net. Electric pulse fishing is a fishing technique sometimes used in trawl fisheries which produces a limited electric field above the seabed to catch fish. [1]
Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries. The water may be in the ocean, a lake, a river or a tank. Typical frequencies associated with underwater acoustics are between 10 ...
“In the restaurant, we use a piece of equipment called a tamis, which allows us to push the potatoes through and leave behind any clumps or lumps, resulting in silky smooth mashed potatoes ...
Scientists carrying out a population and species survey using electrofishing equipment A laksegiljer in Osterfjord, Norway. Basnig - a traditional method of fishing in the Philippines that combines the use of bag nets and attracting fish with high-powered lamps. Specialized outrigger boats known as basnigan are used.
An electric fish is any fish that can generate electric fields, whether to sense things around them, for defence, or to stun prey. Most fish able to produce shocks are also electroreceptive, meaning that they can sense electric fields. The only exception is the stargazer family (Uranoscopidae). Electric fish, although a small minority of all ...
Bottom trawling is trawling (towing a trawl, which is a fishing net) along the seafloor. It is also referred to as "dragging". The scientific community divides bottom trawling into benthic trawling and demersal trawling. Benthic trawling is towing a net at the very bottom of the ocean and demersal trawling is towing a net just above the benthic ...
A fishing light attractor is a fishing aid that uses lights attached to structures above water or suspended underwater to attract fish and members of their food chain. Fish are typically most attracted to true-green light colors. [1] Light attractors work by taking advantage of phototactic behavior exhibited by many species of fish that are ...