Over fishing Karina Atanasova Nina Ilieva Ivoslav Ganchev 10/7
The Problem  <ul><li>Catching too many fish which leads to extinction of their population in certain areas (1) </li></ul><...
“ Fishing Down the Food Chain” <ul><li>Aiming for smaller species that would normally not be used with a commercial purpos...
Bycatch <ul><li>The bycatch – catching unwanted species while aiming for another (1) </li></ul><ul><ul><li>remains unused;...
<ul><li>„ The big fish, the bill fish, the groupers, the big things will be gone. It is happening now. If things go unchec...
Damaging Methods of Fishing  <ul><li>Bottom-trawling </li></ul><ul><li>Throwing a modified net in the sea (that weights mo...
“ Safe” Methods of Fishing <ul><li>Harpooning (4) </li></ul><ul><ul><li>the species can be identified before being killed ...
Other Measures <ul><li>No-take zones  </li></ul><ul><li>Better for the fish (environment) </li></ul><ul><ul><li>Fish are p...
Overall Impact <ul><li>Many fish and marine animals ha ve   been  extinct and would continue to va nish   </li></ul><ul><l...
Cod in Newfoundland (Canada) <ul><li>Where: Newfoundland (Canada) </li></ul><ul><li>What: Cod </li></ul><ul><li>The Proble...
Bluefin Tuna in the Mediterranean <ul><li>Where: Mediterranean </li></ul><ul><li>What: Bluefin Tuna  </li></ul><ul><li>The...
Works Cited <ul><li>1. Koster, Pepijn. &quot;Overfishing - A Global Disaster&quot;.  Overfishing . 2007. Web. 8 June 2010 ...
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Overfishing karina nina_ivoslav_10-7[1]

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Overfishing karina nina_ivoslav_10-7[1]

  1. 1. Over fishing Karina Atanasova Nina Ilieva Ivoslav Ganchev 10/7
  2. 2. The Problem <ul><li>Catching too many fish which leads to extinction of their population in certain areas (1) </li></ul><ul><li>The rate of catching fish is higher than the rate at which fish reproduce (2) </li></ul><ul><li>Current levels of fishing </li></ul><ul><li>It is unsustainable </li></ul><ul><li>The damage – considered even greater than that of pollution (2) </li></ul><ul><li>Causes: need for fish; unsafe fishing methods </li></ul><ul><li>1950-1994 increased with 400% (2) </li></ul><ul><li>1997-1998 – 93 million tons fish caught </li></ul><ul><li>Recently – reduction observed (climate changes) </li></ul>
  3. 3. “ Fishing Down the Food Chain” <ul><li>Aiming for smaller species that would normally not be used with a commercial purpose, called “small-pelagic fish” (3) </li></ul><ul><li>Habitat – near the surface; great significance (3) </li></ul><ul><li>Food chains are destroyed </li></ul><ul><li>Only medium fish and plankton are alive </li></ul><ul><li>WHY? </li></ul><ul><ul><li>Big fish are caught= not eating medium fish </li></ul></ul><ul><ul><li>Medium fish stay alive </li></ul></ul><ul><ul><li>Medium fish eat small fish </li></ul></ul><ul><ul><li>No small fish </li></ul></ul><ul><ul><li>Nothing eats the plankton </li></ul></ul><ul><ul><li>(3) </li></ul></ul>
  4. 4. Bycatch <ul><li>The bycatch – catching unwanted species while aiming for another (1) </li></ul><ul><ul><li>remains unused; sometimes returned (called “discard”) </li></ul></ul><ul><ul><li>dangerous; bycatch may die after returning to the water </li></ul></ul><ul><ul><li>NMFS (National Marine Fisheries Service) call it “the problem of the 1990s” (9) </li></ul></ul><ul><li>Many fishing methods involve bycatch which makes them damaging </li></ul><ul><li>Fish dies -> Consequences for the ecosystem? Diversity? </li></ul>
  5. 5. <ul><li>„ The big fish, the bill fish, the groupers, the big things will be gone. It is happening now. If things go unchecked, we'll have a sea full of little horrible things that nobody wants to eat. We might end up with a marine junkyard dominated by plankton.” – Dr. Daniel Pauly, Professor and Director of the University of British Columbia's Fisheries Centre (8) </li></ul>
  6. 6. Damaging Methods of Fishing <ul><li>Bottom-trawling </li></ul><ul><li>Throwing a modified net in the sea (that weights more than a ton) </li></ul><ul><li>Killing many marine species </li></ul><ul><li>Extremely destructive (5) </li></ul><ul><li>The greatest bycatch (damaged in the net) (9) </li></ul><ul><li>Measures: it is banned in certain areas in the world like the South Pacific (11) </li></ul><ul><li>Gillnetting </li></ul><ul><li>Putting a net (invisible to fish) that captures fish (9) </li></ul><ul><li>Mainly used for salmon, cod, sardine (4) </li></ul><ul><li>Often damages other unwanted fish/marine species (4) </li></ul><ul><li>Northeast </li></ul><ul><li>Bycatch – large fish (ex. sharks) (4, 9) </li></ul>
  7. 7. “ Safe” Methods of Fishing <ul><li>Harpooning (4) </li></ul><ul><ul><li>the species can be identified before being killed </li></ul></ul><ul><ul><li>Used for capturing large fish (ex. swordfish, bluefin tuna) </li></ul></ul><ul><ul><li>Prevents bycatch – fish can be released easily without being damaged </li></ul></ul><ul><li>Trolling (hook and line) (4) </li></ul><ul><ul><li>No damage to the fish </li></ul></ul><ul><ul><li>fish may be released after identification if it is unwanted </li></ul></ul><ul><ul><li>Used for salmon, albacore tuna, etc. </li></ul></ul>
  8. 8. Other Measures <ul><li>No-take zones </li></ul><ul><li>Better for the fish (environment) </li></ul><ul><ul><li>Fish are protected form overfishing </li></ul></ul><ul><ul><li>The fish increase in size </li></ul></ul><ul><ul><li>The variety of the species increases </li></ul></ul><ul><ul><li>The food chain is proper, the ecosystem is restored </li></ul></ul><ul><ul><li>Example: England- lobsters have increased 6-7 times for 5 years (10) </li></ul></ul><ul><li>Better for the industry </li></ul><ul><ul><li>As the fish grow in size there are more fish to sell </li></ul></ul><ul><ul><li>The profits are more </li></ul></ul>
  9. 9. Overall Impact <ul><li>Many fish and marine animals ha ve been extinct and would continue to va nish </li></ul><ul><li>The ecosystems are damaged </li></ul><ul><li>Fish decrease in size and number </li></ul><ul><li>The fish industry suffers from the bad effects on the fish </li></ul><ul><li>Unemployment </li></ul>
  10. 10. Cod in Newfoundland (Canada) <ul><li>Where: Newfoundland (Canada) </li></ul><ul><li>What: Cod </li></ul><ul><li>The Problem: decrease in cod population as well as on the fishing industry </li></ul><ul><ul><li>Impact on the environment: cod almost extinct </li></ul></ul><ul><ul><li>The industry: unemployment; no fishing industry (7) </li></ul></ul><ul><li>Measures taken: In 2003 fishing cod was banned in the area </li></ul>
  11. 11. Bluefin Tuna in the Mediterranean <ul><li>Where: Mediterranean </li></ul><ul><li>What: Bluefin Tuna </li></ul><ul><li>The Problem: the problem with overfishing there has been existing for long time </li></ul><ul><ul><li>Impact on the environment: number of tuna has dramatically decreased </li></ul></ul><ul><ul><li>The industry: industrial fishing – mainly responsible for the problem </li></ul></ul><ul><li>Measures taken: there are plans for the fishing to be banned there during the season when tuna reproduces (6) </li></ul>
  12. 12. Works Cited <ul><li>1. Koster, Pepijn. &quot;Overfishing - A Global Disaster&quot;. Overfishing . 2007. Web. 8 June 2010 <http://overfishing.org/pages/what_is_overfishing.php>. </li></ul><ul><li>2. &quot;Overfishing&quot;. See the Sea . Web. 8 June 2010 <http://see-the-sea.org/topics/commerce/overfishing.htm>. </li></ul><ul><li>3. &quot;FISHING DOWN THE FOOD CHAIN&quot;. Green Peace . Web. 8 June 2010 <http://archive.greenpeace.org/comms/fish/part3.html>. </li></ul><ul><li>4. &quot;Fishing Methods&quot;. Monterey Bay Aquarium . Web. 8 June 2010 <http://www.montereybayaquarium.org/cr/cr_seafoodwatch/sfw_gear.aspx>. </li></ul><ul><li>5. &quot;Bottom Trawling: Overview&quot;. Oceana . Web. 8 June 2010 <http://na.oceana.org/en/our-work/promote-responsible-fishing/bottom-trawling/overview>. </li></ul><ul><li>6. &quot;Soon no bluefin tuna to be fished in the Mediterranean&quot;. WWF . 11 Sept 2006. Web. 8 June 2010 <http://www.wwf.org.au/news/soon-no-bluefin-tuna-to-be-fished-in-the-mediterranean/>. </li></ul><ul><li>7. &quot;Cod's warning from Newfoundland&quot;. BBC News . 16 Dec 2002. Web. 8 June 2010 <http://news.bbc.co.uk/2/hi/science/nature/2580733.stm>. </li></ul><ul><li>8. Koster, Pepijn. &quot;Overfishing - A Global Disaster&quot;. Overfishing . 2007. Web. 15 June 2010 <http://overfishing.org/pages/why_is_overfishing_a_problem.php> </li></ul><ul><li>9. Castro, Kathleen, Williams. “Bycatch”. Rhode Island Sea Grant . 2003. Web. 15 June 2010 < http://seagrant.gso.uri.edu/factsheets/Bycatch.html> </li></ul><ul><li>10 . &quot;Marine No-take Zones Are Succeeding beyond Expectations.&quot; Conservation and Environmental Science News . Web. 15 June 2010. <http://news.mongabay.com/2008/0716-hance_fishing.html>. </li></ul><ul><li>11 . &quot;Visible from Space Bottom Trawling Impacts.&quot; EurekAlert! - Science News . Web. 06 June 2010. <http://www.eurekalert.org/pub_releases/2008-02/s-bti021508.php>. </li></ul><ul><li>http://privatelibrary.typepad.com/.a/6a01156f7ea6f7970b0120a566f154970c-800wi </li></ul><ul><li>http://www.oceanconservancy.org/images/content/pagebuilder/23588.jpg </li></ul><ul><li>http://4.bp.blogspot.com/_4CTvIprhy6M/SxWbINCA1JI/AAAAAAAAAMU/tuRAVAyOsRU/s1600/ltompzones.gif </li></ul><ul><li>http://moldychum.typepad.com/moldy_chum/images/2008/08/11/gillnet_damage.jpg </li></ul><ul><li>http://www.greenpeace.org/raw/image_full/australia/admin/image-library2/before-and-after-view-of-botto.jpg </li></ul><ul><li>http://www.buyecofriendlyproducts.com/wp-content/uploads/2009/07/Seafood-farming.jpg </li></ul><ul><li>http://photos.mongabay.com/08/0108_Overfishing.jpg </li></ul><ul><li>http://endoftheline.com/files/10021232140490fish-on-slab-550.jpg </li></ul><ul><li>http://www.montereybayaquarium.org/cr/cr_seafoodwatch/content/images/gear/harpooning4.jpg </li></ul>

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