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Katiska trap A katiska is a portable fish trap used in Finland. It is a lightweight and made from chicken wire. The trap can either be collapsible or rigid, and is easily placed at any depth since it needs no anchoring. Katiska are commonly used in hobby fishing, since they catch only a small number of fish.
A fishing weir, fish weir, fishgarth [1] or kiddle [2] is an obstruction placed in tidal waters, or wholly or partially across a river, to direct the passage of, or trap fish. A weir may be used to trap marine fish in the intertidal zone as the tide recedes, fish such as salmon as they attempt to swim upstream to breed in a river, or eels as ...
Putcher fishing is a type of fishing (usually of salmon) which employs multiple putcher baskets, set in a fixed wooden frame, against the tide in a river estuary, notably on the River Severn, in England and South East Wales. Putchers are placed in rows, standing four or five high, in a wooden "rank" set out against the incoming and/or outgoing ...
A hand-tinted postcard of a fish wheel on the lower Columbia River around 1910. The abundance of salmon in the Columbia River of Oregon state made the area popular to Euro-American traders and business-people in the nineteenth century, those whom quickly anchored a profitable business of trade with Indigenous communities, riverboats, and steamships traveling along the Pacific coast.
Cyanide fishing is a method of collecting live fish mainly for use in aquariums, which involves spraying a sodium cyanide mixture into the desired fish's habitat in order to stun the fish. The practice hurts not only the target population, but also many other marine organisms, including coral and thus coral reefs .
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On a dry-dry basis, 2–4 kg of wild-caught fish are needed to produce 1 kg of salmon. [23] The ratio may be reduced if non-fish sources are added. [20] Wild salmon require about 10 kg of forage fish to produce 1 kg of salmon, as part of the normal trophic level energy transfer. The difference between the two numbers is related to farmed salmon ...
A study of fish caught in shallow water on the Great Barrier Reef showed high survival rates (97%+), [12] for released fish if handled correctly and particularly if caught on artificial baits such as lures. Fish caught on lures are usually hooked cleanly in the mouth, minimizing injury and aiding release.