Blast fishing, when dynamite or other explosives are used to stun or kill fish, is a practice used in many villages and isolated regions of the world. Hundreds of fish can be seen strewn across the reef, left as bycatch, such as these tropical fish in Thailand.
How do people fish with dynamite?
Today, fishermen mostly use homemade bombs that are made from bottles filled with an explosive mixture; weights are also added to make the bottle sink faster underwater. After the bomb explodes, the fish killed or stunned by the shock wave from the explosion are collected.
Why do they use dynamite fishing?
Dynamite is used by unscrupulous fishermen to blast coral reefs and other shallow areas to stun fish, which are then collected from the surface or shallow waters. Because it explodes like a bomb, it is locally known as bomu. Its explosion is highly damaging to the benthic communities and branching corals.
Where is it legal to fish with dynamite?
Around the world, fishermen are using explosives, often with dynamite, to maximize their catch. Called blast fishing or dynamite fishing, the practice goes on in nations from Lebanon and Malaysia to the Philippines, while some countries—Kenya and Mozambique, for instance—have managed to stamp it out.
Why is dynamite fishing a bad practice?
Also known as blast or dynamite fishing, fish bombing is one of the most destructive forms of fishing because it indiscriminately kills any animal in the blast area—from fish eggs and plankton to whales and dolphins—and devastates corals.
Why is dynamite fishing being prohibited?
The explosives used destroy the marine environment, leaving it devoid of life. Dynamite fishing has contributed to massive destruction of Southeast Asian coral reefs over the past 20 years. … Dynamite fishing is one of the most pervasive fishing techniques and it is banned by most countries.
Who invented dynamite fishing?
Some records say the practice began in the Philippines, where fishermen used dynamite left over from the two world wars. However, there is evidence that it was practiced in Peru even earlier.
How is blast fishing bad?
Dynamite fishing destroys both the food chain and the corals where the fish nest and grow. Blast fishing kills the entire food chain, including plankton, fish both large and small, and the juveniles that do not grow old enough to spawn.
When did dynamite become illegal?
In 1970, federal legislation restricted explosives to people who’d been granted a special permit by the Bureau of Alcohol, Tobacco and Firearms. Today, nobody without a permit is even allowed to carry a stick of dynamite across a room, to say nothing of actually buying one or lighting it off.
Do bombs explode in water?
At the maximum diameter of the first oscillation, a very large nuclear bomb exploded in very deep water creates a bubble about a half-mile (800 m) wide in about one second and then contracts, which also takes about a second. Blast bubbles from deep nuclear explosions have slightly longer oscillations than shallow ones.
What happens if you shoot a stick of dynamite?
Some bomb materials are highly sensitive to impact; if you shoot a gun at a stick of dynamite, for example, there’s a good chance you’ll set it off. … Such a bomb would have a detonator, which is far more vulnerable. The detonator serves as a mini-bomb that produces enough energy to blow up the main explosive.
How common is blast fishing?
Blast fishing occurs in over 40 countries worldwide. In Africa it has been particularly problematic in Tanzania, destroying Tanzania’s coral reefs and all the benefits they provide, and threatening the country’s international tourism industry as destroyed reefs and the danger of explosions drive tourists away.
Does dynamite work underwater?
Dynamite is an explosive based on the explosive potential of nitroglycerin using diatomaceous earth as an adsorbent. Dynamite is still used, mainly as bottom charge or in underwater blasting. …