Trawlers were skeptical that the new rules would stimulate the decline of demersal stocks on the west coast, but did not believe the trawl ban would affect their livelihoods, as most of the restricted areas for trawlers are too deep. Environmentalists say trawling destroys sensitive seabed habitats. However, fishermen say there is no evidence that trawling has affected the productivity of demersal stocks that form the basis of commercial fishing on the West Coast. “It`s monumental,” said Geoffrey Shester, senior scientist at conservation group Oceana, which has been fighting for years to limit bottom trawling, which has long been considered the most harmful fishing method in the ocean. “This puts the West Coast at the forefront of global leadership in protecting our seabed. Peter Fimrite is the Chronicle`s senior science reporter, covering environmental, atmospheric and ecosystem sciences. Its pace includes earthquake research, marine biology, wildfire research, nuclear testing, archaeology, wildlife, and scientific exploration of land and sea. He also writes about the cannabis industry, outdoor adventures, Native American issues, and Western culture. A former U.S. Forest Service firefighter, he has traveled extensively throughout his career and has covered a variety of topics, including the Beijing Olympics, Hurricane Katrina, the illegal United States being a crisis. We now need a ban on bottom trawling – the practice of throwing heavy fishing nets on the seabed is disastrous for the planet. Not all trawls are the same.
Trawls, like some bottom otter trawls, can be a very destructive fishing gear when used on structured bottoms such as reefs, and trawls are designed to dig into the ground.83 Trawls can also be designed to fish in the water column and not have much interaction with the seabed. Shrimp trawls are designed to “fly” along the bottom (slightly chained and build the net) rather than sinking into sand or mud.84 A tickling chain in front of the net surprises/disturbs slower swimming organisms to the water column, where they are picked up by the trawl.85 Shrimp trawlers actually try to avoid structured habitats (oyster beds) or obstacles. because the trawl is likely to damage or build the net.84 A tickling chain in front of the net surprises/disturbs slow-moving swimming organisms to the water column, where they are picked up by the trawl.85 Shrimp trawlers actually try to avoid structured habitats (oyster beds) or obstacles, as the trawl is likely to damage or cause significant economic losses due to loss of fishing time and replacement. repair of expensive equipment. Most trawls (otters) use structures that involve the friction of water during towing to spread the fortified net. These structures are called “gates”. 86 The smaller doors that extend the net are used because fishermen want to keep fuel costs as low as possible. In shrimp trawls, the doors are attached to the net so as not to dig excessively into the ground and to keep the net close to the bottom (where the shrimp are).87 Doors are designed to slide along the seabed, because when they “dig” in mud or sand, fuel costs increase dramatically and shrimp catch rates become less efficient. Extremely large doors can only be efficiently pulled by relatively large vessels due to performance limitations. Most vessels pulling shrimp trawls in North Carolina`s inland waters are between 22 and 53 feet long. All fishing countries in the region (which account for about 25 percent of the world`s ocean) have agreed to exclude bottom trawling in the high seas, where sensitive ecosystems are likely or known, pending a specific impact assessment and precautionary measures taken. In addition, observers are required on all deep-sea bottom trawlers for enforcement.
Trawling is a fishing method in which a fishing net is pulled into the water behind one or more vessels. The net used for trawling is called a trawl. This principle requires net bags to be pulled into the water to catch different species of fish or sometimes target species. Trawls are often referred to as towed gear or trailed catch. Medium-water trawling is a much “cleaner” fishing method because catches are usually only one species and do not physically damage the seabed. However, environmental groups have expressed concerns that this fishing practice could be responsible for significant amounts of bycatch, particularly for whales (dolphins, porpoises and whales).  Bottom trawling is a fishing method that pulls heavy nets across the seabed to catch fish. This is a preferred method for commercial fishing companies because it can catch large quantities of products at once. Today, some countries regulate bottom trawling within their territory: mid-range trawling or pelagic trawling targets fish that live in the upper ocean water column. Funnel-shaped trawls are pulled by one or two boats. This method is usually used to catch fish of a single species. Unlike bottom trawling, this type of trawl does not come into contact with the seabed and is therefore not involved in the degradation of the marine habitat.
Some species caught with this method of trawling are mackerel, herring and hoki.