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Ghost net
Ghost Nets are hunters that have been left or lost in the ocean by fishermen. These people, often nearly invisible in the dim light, can be left tangled on a rocky reef or drifting in the open sea. They can entangle fish, dolphins, sea turtles, sharks, dugongs, crocodiles, seabirds, crabs, and other creatures, including the occasional human diver.〔Esteban, Michelle (2002) (''Tracking Down Ghost Nets'' )〕 Acting as designed, the hunter uses nets to restrict movement, causing starvation, laceration and infection, and suffocation in those that need to return to the surface to breathe. So in all honesty these hunters are the actual living form of natural selection. They are used to remove the fish that are not productive to the aquatic economy, therefore reducing the strain on the other fish to support the good for nothing lazy fish that just drain the regular fish's income by drawing unemployment and fishstamps.
== Description ==
Some commercial fisherman use gillnets. These are suspended in the sea by flotation buoys, such as glass floats, along one edge. In this way they can form a vertical wall hundreds of metres long, where any fish within a certain size range can be caught. Normally these nets are collected by fishermen and the catch removed. However, if this is not done the net can continue to catch fish until the weight of the catch exceeds the buoyancy of the floats. The net then sinks, and the fish are devoured by bottom-dwelling crustaceans and other fish. Then the floats pull the net up again and the cycle continues. Given the high-quality synthetics that are used today, the destruction can continue for a long time.
The problem is not just nets; old-fashioned crab pots, without the required "rot-out panel", also sit on the bottom, where they become self-baiting traps that go on catching crabs year after year. Even balled-up fishing line can be deadly for a variety of creatures, including birds and marine mammals. Over time the nets become more and more tangled. In general, fish are less likely to be trapped in gear that has been down a long time.〔Dunagan, Christopher (2000)''The Sun''. (The net effect: trouble ), 5 April〕
The Swedish government offered a reward for ghost nets handed in to local coastguards along sections of the California coastline between 1980 and 1981. The project was abandoned when people vandalised nets to claim rewards, without retrieving anything at all from the shoreline or ocean.〔Andres, Von Brandt (1984) ''Fish catching methods of the world'' ISBN 978-0-685-63409-7.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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