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Generally, cages are made of two nets; inner nets, which wrap around the cages, hold the salmon while outer nets, which are held by floats, keep predators out. [102] Many Atlantic salmon escape from cages at sea. Those salmon that further breed tend to lessen the genetic diversity of the species leading to lower survival rates, and lower catch ...
A cargo barrier is a vehicle accessory installed into motor vehicles to aid occupancy safety when carrying loads or domestic pets, (usually dogs) in the rear section of a vehicle. Other terms used for cargo barriers include: dog guard, mesh partition, load separator, pet barrier, and mesh grille.
Pool-and-weir fish ladder at Bonneville Dam on the Columbia River Drone video of a fish way in Estonia, on the river Jägala FERC fish ladder safety sign. A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon, is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as ...
Acoustic harassment and acoustic deterrents are technologies used to keep animals [1] and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from aquaculture facilities and to keep birds away from certain areas (for instance in the vicinity of airports and blueberry fields).
The U.S. will no longer allow the import of seafood linked to the bycatch of marine mammals. Each year, over 650,000 marine mammals, including seals, whales, and dolphins, are killed by ...
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. [1] The use of traps are culturally almost universal around the world and seem to have been independently invented many times.