When people catch fish faster than the fish can repopulate (7) http://ecogeneration.org/activities/news/view.html?boardno=47&cat1=0&cat2=0&thread=1108&no=1108&page=2&search=&keyword=
Is the current level of global fish catch sustainable?
No, it is not .
Even though our planet has enough fish to cover other four planets, MANY SPECIES HAVE BEEN REDUCED OR HAVE BECOME EXTINCT.
Marine scientists now think that overfishing is a bigger threat to the ocean environment than pollution (10)
Overfishing and the food web http://amurdoch.tripod.com/yr4/AntFoodWeb.JPG
Fishing down the food chain
The fishermen catch large fish which they can sell for much money, but as the time passes it becomes hard of even impossible to catch such species, so the have to catch smaller fish with less economic value. (13)
So the fishermen go from the upper part of the food chain downwards. (13)
Fishing down the food chain http://naturalpatriot.org/wp-content/uploads/2007/12/fishing_down_the_food_web.jpg
Why do governments support money-losing and ecosystem-destroying fishing industries?! http://www.pastemagazine.com/blogs/playlist/2009/04/-pastes-tax-refund-playlist-cash-money-mix.html
Why do governments support money-losing and ecosystem-destroying fishing industries?!
To support the livelihood of fishing communities and people living in these areas that depend on fishing as a way to earn money and make a living
To not support these industries would be an unpopular measure, as people around fishing communities have usually been doing the same thing (fishing) for generations
Even though the fishing industries are money-losing, if the governments stop the fishing they will have to spend much more money in order to train the fishermen to do some other job and to relocate them and their families to another area
Does anybody win from the overfishing? http://www.grinningplanet.com/2005/06-07/overfishing-article.htm
What is Bycatch? http://www.safmc.net/Portals/0/shrimp%20bycatch.jpg
What is bycatch?
Billions of unwanted animals, like dolphins, sea-turtles, sharks and starfish, are caught by accident every year and then returned to the ocean dead or dying.
A major problem for the fishing industry since it wastes valuable resources and time.
However , it is even more harmful to the ecosystems since it poses a threat to many marine animals and decreases their populations. (5)
Particularly Harming Fishing
One of the most harming ones is trawling , which means to drag huge nets, sometimes as big as a football field, across the ocean floor. This results in big amounts of bycatch.
The other very harmful method is using dredges , which are metal frames with attached bags, and are used to catch species living in the sand. This not only results in bycatch, but it damages the surface of the ocean as well. (12)
Bottom-trawling is towing a fishing net along the sea floor and it is a very destructive fishing method as large heavy plates are dragged across the sea floor and entire marine life habitats are forced into a net.
Benthic trawling is when you tow a net at the bottom of the ocean floor
Demersal trawling is when you a tow a net just above the benthic zone
Whatever is caught in the net is then sorted at the surface with only the t arget/commercial species being kept
Example 2 http://www.cartoonstock.com/newscartoons/cartoonists/pwe/lowres/pwen25l.jpg
tuna in Europe
The stocks of the fish are
becoming dangerously low
due to over-fishing
- It is highly valued in Japan and a kilo of it can sell for up to hundreds of dollars
In a report published by the WWF, the fish caught by the flee is more than 3 times the amount suggested by scientists (9)
There have been talks of what actions to take in order to stabilize the bluefin population, but the estimates from 2009 are that this fast and large predator will be wiped out in 3 years (14)
1. "Www.deepsearch.org » Glossary of Terms Related to Boats, Submarines, Sub-sea Communications, Marine Science, and Deep Ocean Research." Www.deepsearch.org . Web. 05 Dec. 2010. <http://www.deepsearch.org/?page_id=26>.
13. Hughes, Terry. "What are the Benefits of No-Take Zones? How Do They Work? ." Coralcoe . N.p., n.d. Web. 12 Dec. 2010. <http://www.coralcoe.org.au/research-tools/qpwstalks/NO-TAKE%20ZONES.pdf>.
14. Harding, Ben. "Overfishing to wipe out bluefin tuna in 3 years: WWF." Reuters . N.p., n.d. Web. 12 Dec. 2010. <http://www.reuters.com/ article/idUSTRE53D00320090414>.
15. "Overfishing - A Global Environmental Problem, Threat and Disaster." Overfishing - A Global Environmental Problem, Threat and Disaster. Web. 12 Dec. 2010. <http://overfishing.org/pages/why_is_overfishing_a_problem.php>.
17. "Overfishing - A Global Environmental Problem, Threat and Disaster." Overfishing - A Global Environmental Problem, Threat and Disaster. Web. 12 Dec. 2010. <http://overfishing.org/pages/what_is_overfishing.php>.
18. "Environmental Impact of Aquaculture." Providence College - Home. Web. 12 Dec. 2010. <http://www.providence.edu/polisci/students/aquaculture/environmentalimpact.html>.