Commerical fishing ill affects
The alteration of the habitat by various human activities may be physical e.
This was not done. Intensive shrimp farming in Southeast Asia, for example, has destroyed so many coastal mangrove forests over the last few decades that their shores are now more vulnerable to deadly tidal waves.
Positive effects of fishing
Ecological Applications, According to the FAO Code of Conduct for Responsible Fisheries, States should act to minimize the amount of lost and abandoned gear, and work to minimize ghost fishing. A recent review of the issue has been undertaken by Cook An overabundance of sediment creates murky waters, blocking sunlight from reaching underwater plants and creating dead zones of oxygen deficiency. The use of dynamite and other explosives for "blast fishing" is still common in parts of Asia, Africa, Caribbean and South Pacific. Farmed fish are densely packed together in pens for maximum production efficiency, but the fecal matter that accumulates in these filthy conditions can create algal blooms that deplete the water around aquaculture facilities of oxygen so that these areas can no longer support sea life. Both are harmful to the animal. Lenihan, H. Highly dynamic, soft bottoms e. The explosion stuns nearby fish and can make their swim bladders rupture, causing them to float to the surface for easy capture. In the Gulf of Mexico, bycatch of Kemp's ridley turtles in shrimp trawlers was cited as a major factor in declines of the species.
In addition to direct mortality, ghost pots can also alter population demographics. Solutions In recent years, the consequences of fishing have increasingly become the source of research interest. Main articles: Blast fishingCyanide fishingBottom trawlingand Ghost net A sea turtle killed by a boat propeller Some fishing techniques cause habitat destruction.
Fishers in the United States also buy about 4, tons 3, metric tons of lead fishing sinkers each year [source: U. The number of fish was so greatly reduced that the fishing catch went from Large-scale commercial fishing is also known as industrial fishing.
However, by taking so many fish from the seas, humans have removed entire links from the aquatic food chain, upsetting the delicate balance of nature.
Environmental benefits of fishing
Human Ecology Review, Scientists studying the aftermath of the tsunami documented fewer human deaths and less property damage in areas with intact mangrove forests compared to those where they had been decimated. The research, however, has indicated that if the fishing industry continues as is, wild-caught seafood will be non-existent by the year Barlow, J. Perhaps the best known example of this comes from the Atlantic cod. What is the Environmental Impact of the Fishing Industry? The industry, in , also managed to generate over billion dollars in sales and also provide over two million jobs in the United States, according to an economic report released by NOAA's Fisheries Service. These fisheries management policies are aimed at marine life conservation and are based on fishery science. Even most sport fishing tournaments are catch and release [source: NOAA ]. In addition, fisheries management policies that are designed to maximize sustainable biomass and economic yields, increase the number of jobs, and increase export values. Crognale, M. In order to accomplish the goal of marine conservation, these new policies have implemented laws which: define daily fishing limits per species, limit the number of days at sea, put a cap on the number of fishing boats allowed in one area, prohibit spears and bait, set minimum mesh sizes, and place restrictions based on seasons.
In some instances the discarded portion is known as discards. The explosion stuns nearby fish and can make their swim bladders rupture, causing them to float to the surface for easy capture. This has led to the breakdown of some sea ecosystems and several fishing industries whose catch has been greatly diminished.
In fact, with the human population expected to reach nine billion by mid-century, scientists now warn that 90 percent of all commercially-exploited fish species could become extinct by if current consumption trends continue. Fishing piers can be sites of ghost fishing as lures and lines become wrapped around pilings, where animals swimming by become trapped.
based on 109 review