By Stoyan Zakov, Elia Hristova, Nadezhda Trichkova 10/5 Overfishing
Current Level of Global Fishing <ul><li>It is sustainable </li></ul><ul><li>Overfishing causes a lot of problems </li></ul...
Fishing down the Food Chain <ul><li>Catching the biggest fish -> Going down the next levels </li></ul><ul><li>Smaller fish...
Bycatch <ul><li>Catching of animals without intention </li></ul><ul><li>Thrown back or kept for selling </li></ul><ul><li>...
B ottom-trawling <ul><li>Catching of fish in extremely big amounts using big nets </li></ul><ul><li>Placed at the sea floo...
No-take Zones <ul><li>zones, where fishing is forbidden (“Overfishing”) </li></ul><ul><li>4% of the Great Barrier Reef – p...
Impact <ul><li>changed marine food webs </li></ul><ul><li>effect on predator-prey interactions and competitive interaction...
http://web.mit.edu/12.000/www/m2011/finalwebsite/graphics/intro/OVERFISHINGfromPEW.gif
<ul><li>1. Beginning of the problem </li></ul><ul><li>The first Europeans- traditional meal </li></ul><ul><li>Salmon canne...
Numbers and Solution <ul><li>1. Numbers </li></ul><ul><li>2009 -10.6 million sockeyes expected 1.7 came (“Is the Pacific…”...
http://www.google.bg/imgres?imgurl=http://www.usgcrp.gov/usgcrp/Library/nationalassessment/LargerImages/RegionGraphics/Pac...
Boom of Jellyfish in the Black Sea <ul><li>top predators (dolphins and bluefin tuna) – removed </li></ul><ul><li>increase ...
http://www.mnsu.edu/emuseum/information/oceans/images/pacificmap.jpg http://newsimg.bbc.co.uk/media/images/43012000/gif/_4...
Works Cited <ul><li>“ Atlantic sharks at risk due to over-fishing: study”  Canwest News Service . 17th June, 2010 </li></u...
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Overfishing stoyan elia_nadezhda_10-5

  1. 1. By Stoyan Zakov, Elia Hristova, Nadezhda Trichkova 10/5 Overfishing
  2. 2. Current Level of Global Fishing <ul><li>It is sustainable </li></ul><ul><li>Overfishing causes a lot of problems </li></ul><ul><li>Consequences of increase of human population </li></ul><ul><li>Artificial breeding (Over Fishing) </li></ul><ul><li>Affected Areas </li></ul><ul><li>Atlantic Ocean (Atlantic sharks…) </li></ul><ul><li>Philippines (Pine, Ruel) </li></ul><ul><li> http://trendsupdates.com/wp-content/uploads/2009/11/overfishing2.jpg </li></ul>
  3. 3. Fishing down the Food Chain <ul><li>Catching the biggest fish -> Going down the next levels </li></ul><ul><li>Smaller fish – new target </li></ul><ul><li>Lack of food </li></ul><ul><li>Extinction of animals </li></ul><ul><li>Competition (Fishing Down…) </li></ul><ul><li>http://upload.wikimedia.org/wikipedia/commons/archive/a/a2/20090326090801!Fishing_down_the_food_web.jpg </li></ul>
  4. 4. Bycatch <ul><li>Catching of animals without intention </li></ul><ul><li>Thrown back or kept for selling </li></ul><ul><li>Reason – catching techniques (bottom-trawling) </li></ul><ul><li>Solutions (Castro, Kathleen) </li></ul><ul><li> http://www.greenpeace.org.uk/files/images/frontpage/oceans/sustainable_seafood/bycatch_2.jpg </li></ul>
  5. 5. B ottom-trawling <ul><li>Catching of fish in extremely big amounts using big nets </li></ul><ul><li>Placed at the sea floor </li></ul><ul><li>A lot of needless animals and corals are caught </li></ul><ul><li>mixing of water and mud/ sand </li></ul><ul><li>death of many animals (Norse, Elliotte) </li></ul><ul><li> http://www.marelec.com/images/b1.GIF </li></ul>
  6. 6. No-take Zones <ul><li>zones, where fishing is forbidden (“Overfishing”) </li></ul><ul><li>4% of the Great Barrier Reef – protected (“Human Impact…”) </li></ul><ul><li>ecosystems – restored (“Over Fishing”) </li></ul><ul><li>increase in the species diversity, abundance of fish, size of individuals </li></ul><ul><li>positive effect on fishing industries (“Overfishing”) </li></ul><ul><li>control on number and size of the caught fish, on species, and gears used </li></ul><ul><li>fines and penalties (“Overfishing”) </li></ul>
  7. 7. Impact <ul><li>changed marine food webs </li></ul><ul><li>effect on predator-prey interactions and competitive interactions (“Human Impact…”) </li></ul><ul><li>Example: cod and herring (“Over Fishing”) </li></ul><ul><li>decrease in an ecosystem’s biodiversity </li></ul><ul><li>destroyed balance </li></ul><ul><li>=> the structure and function of the ecosystem are altered </li></ul><ul><li>(“Human Impact…”) </li></ul>
  8. 8. http://web.mit.edu/12.000/www/m2011/finalwebsite/graphics/intro/OVERFISHINGfromPEW.gif
  9. 9. <ul><li>1. Beginning of the problem </li></ul><ul><li>The first Europeans- traditional meal </li></ul><ul><li>Salmon cannery 1876 -financial benefit from salmon </li></ul><ul><li>Until the end of the century 70 canneries - expansion of problem </li></ul><ul><li>2. Weather problem </li></ul><ul><li>Weather is affecting </li></ul><ul><li>salmon population </li></ul><ul><li>Global warming </li></ul><ul><li>human affect </li></ul><ul><li>(“Salmon - The Story and History of Pacific Salmon”) </li></ul>Pacific Salmon Overfishing http://www.jimsfishing.com/images-links/chinook1.jpg
  10. 10. Numbers and Solution <ul><li>1. Numbers </li></ul><ul><li>2009 -10.6 million sockeyes expected 1.7 came (“Is the Pacific…” ) </li></ul><ul><li>2. Solution </li></ul><ul><li>2009 treaty between Canada and the USA for 10 years - Pacific Salmon Commission </li></ul><ul><li>lowering of fishing with about 15% in Alaska </li></ul><ul><li>lowering with about 30% in Canada </li></ul><ul><li>aiming to support the ecosystem of the west pacific coast of North America and fishery collapse (“Salmon treaty…” ) </li></ul><ul><li>USA 30 million dollars support </li></ul><ul><li>Previous agreement from 1985 (“Salmon treaty…” ) </li></ul>
  11. 11. http://www.google.bg/imgres?imgurl=http://www.usgcrp.gov/usgcrp/Library/nationalassessment/LargerImages/RegionGraphics/Pacific%2520Northwest/Salmon.jpg&imgrefurl=http://www.usgcrp.gov/usgcrp/Library/nationalassessment/overviewpnw.htm&usg=__c4YiFTrLAbi935jWDThEo4rRlVM=&h=364&w=414&sz=47&hl=bg&start=109&um=1&itbs=1&tbnid=gp3ZIJEYEbbaEM:&tbnh=110&tbnw=125&prev=/images%3Fq%3Dgraphics%2Bfor%2Bpacific%2Bsalmon%2Bfishing%2Busa%26start%3D108%26um%3D1%26hl%3Dbg%26sa%3DN%26ndsp%3D18%26tbs%3Disch:1
  12. 12. Boom of Jellyfish in the Black Sea <ul><li>top predators (dolphins and bluefin tuna) – removed </li></ul><ul><li>increase in small fish number </li></ul><ul><li>changed fishing industry </li></ul><ul><li>a boom in jellyfish population </li></ul><ul><li>comb jellyfish – 90% of the biomass </li></ul><ul><li>reason: the abundance of zooplankton </li></ul><ul><li>negative effect on tourism </li></ul><ul><li>(“Fishing 'destabilises Black Sea’”) </li></ul><ul><li> http://dormivigilia.files.wordpress.com/2009/07/comb-jelly.jpg </li></ul>
  13. 13. http://www.mnsu.edu/emuseum/information/oceans/images/pacificmap.jpg http://newsimg.bbc.co.uk/media/images/43012000/gif/_43012245_black_sea_map203.gif
  14. 14. Works Cited <ul><li>“ Atlantic sharks at risk due to over-fishing: study” Canwest News Service . 17th June, 2010 </li></ul><ul><li><http://www.vancouversun.com/technology/environment/Atlantic+sharks+risk+over+fishing+study/976868/story.html > </li></ul><ul><li>Castro, Kathleen. “Bycatch” 17th June, 2010 </li></ul><ul><li>< http://seagrant.gso.uri.edu/factsheets/Bycatch.html > </li></ul><ul><li>“ Fishing 'destabilises Black Sea'.” BBC News. 2010. </li></ul><ul><li>10 June 2010. < http://news.bbc.co.uk/2/hi/science/nature/6719965.stm>. </li></ul><ul><li>“ Fishing Down the Food Chain.” 17th June, 2010 </li></ul><ul><li>< http://archive.greenpeace.org/comms/fish/part3.html > </li></ul><ul><li>Hughes, Terry. “What are the Benefits of No-take Zones?” Arc Centre of Excellence. Coral Reef Studies.10 June 2010. </li></ul><ul><li> <http://www.coralcoe.org.au/research-tools/qpwstalks/NO-TAKE%20ZONES.pdf>. </li></ul><ul><li>“ Human Impact on the Great Barrier Reef.” University of Michigan. </li></ul><ul><li>10 June 2010. < http://sitemaker.umich.edu/gc2sec7labgroup3/over-fishing>. </li></ul><ul><li>“ Is the Pacific salmon fishery collapsing or sustainable?” The Vancouver Sun. 2008 - 2010 Canwest Publishing Inc.10 June 2010. <http://www.vancouversun.com/business/Pacific+salmon+fishery+collapsing+sustainable/2049806/story.html>. </li></ul><ul><li>Norse, Elliotte. “Bottom trawling impacts, clearly visible from space” 17th June, 2010 </li></ul><ul><li>< http://www.eurekalert.org/pub_releases/2008-02/s-bti021508.php > </li></ul><ul><li>“ Over Fishing.” People’s Trust for the Environment. </li></ul><ul><li>10 June 2010. <http://www.ypte.org.uk/environmental/over-fishing/29>. </li></ul><ul><li>&quot;Overfishing.&quot; World Resources Institute . 10 G Street NE Suite 800 Washington, DC 20002, USA. </li></ul><ul><li>10 June 2010. <http://archive.wri.org/page.cfm?id=3060&z=?>. </li></ul><ul><li>“ Over Fishing.” Buffalo, NY. 17th June, 2010 </li></ul><ul><li>< http://www.conservenature.org/orca_salmon_forest/overfishing.htm > </li></ul><ul><li>Pine, Ruel. “Overfishing in the Philippines threatens whale sharks and local fisheries” 17th June, 2010 </li></ul><ul><li> < http://wwf.panda.org/who_we_are/wwf_offices/philippines/news/?62160/Overfishing-in-the-Philippines-threatens-whale-sharks-and-local-fisheries > </li></ul><ul><li>“ Salmon - The Story and History of Pacific Salmon.” What’s Cooking America. 2004-2010, Linda Stradley. </li></ul><ul><li>10 June 2010. < http://whatscookingamerica.net/salmon.htm>. </li></ul><ul><li>“ Salmon treaty aims to prevent overfishing on West Coast.” KOMOnews.com. 2010 Fisher Communications, Inc. </li></ul><ul><li>10 June 2010. < http://www.komonews.com/news/local/19210734.html>. </li></ul>

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