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Electrofishing. 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.
Freshwater fishes like the electric eel require a high voltage to give a strong shock because freshwater has high resistance; powerful marine electric fishes like the torpedo ray give a shock at much lower voltage but a far higher current. The electric eel produces its strong discharge extremely rapidly, at a rate of as much as 500 Hertz ...
Mahseer. Mahseer is the common name used for the genera Tor, Neolissochilus, Naziritor and Parator in the family Cyprinidae (carps). [1][2][3] The name is, however, more often restricted to members of the genus Tor. [4] The range of these fish is from Vietnam in the east and China in the north, through Laos, Cambodia, Thailand, Malaysia, Brunei ...
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 ...
A salmon run is an annual fish migration event where many salmonid species, which are typically hatched in fresh water and live most of the adult life downstream in the ocean, swim back against the stream to the upper reaches of rivers to spawn on the gravel beds of small creeks. After spawning, all species of Pacific salmon and most Atlantic ...
A piranha or piraña (/ p ɪ ˈ r ɑː n j ə ˌ-r æ n /, or / p ɪ ˈ r ɑː n ə /; Portuguese: [piˈɾɐ̃ɲɐ], Spanish:) is any of a number of freshwater fish species in the family Serrasalmidae, [1] or the subfamily Serrasalminae within the tetra family, Characidae [2] in order Characiformes.
The Piscataqua River (Abenaki: Pskehtekwis) is a 12-mile-long (19 km) tidal river forming the boundary of the U.S. states of New Hampshire and Maine from its origin at the confluence of the Salmon Falls River and Cochecho River to the Atlantic Ocean. The drainage basin of the river is approximately 1,495 square miles (3,870 km 2), including the ...
The skipjack herring (Alosa chrysochloris) is a North American, migratory, fresh- and brackish water fish species in the herring family Alosidae. [3] The name skipjack shad comes from the fact that it is commonly seen leaping out of the water while feeding. [4] Other common names include blue herring, golden shad, river shad, Tennessee tarpon ...
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