Your SlideShare is downloading. ×
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Overfishing & Aquaculture
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Overfishing & Aquaculture

5,866

Published on

Covers current state of global fisheries, fishing technology, bycatch, artificial reefs and aquaculture.

Covers current state of global fisheries, fishing technology, bycatch, artificial reefs and aquaculture.

Published in: Technology, Business
1 Comment
0 Likes
Statistics
Notes
  • Fioricet is often prescribed for tension headaches caused by contractions of the muscles in the neck and shoulder area. Buy now from http://www.fioricetsupply.com and make a deal for you.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

No Downloads
Views
Total Views
5,866
On Slideshare
0
From Embeds
0
Number of Embeds
6
Actions
Shares
0
Downloads
288
Comments
1
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. OVERFISHING & AQUACULTURE
  • 2. WHERE DO WE GET THE FISH AND SHELLFISH WE EAT?
  • 3. Oceans and Fish Farms  7% of the global food supply comes from marine organisms.  55% (3.8%) of our annual catch comes from the oceans.  45% (3.2%) of our annual catch comes from aquaculture.
  • 4. Major Commercial Marine Speices Fish Shellfish Demersal Pelagic Crustaceans Mollusks (mostly bottom dwelling) (surface dwelling) Hake Sardine Anchovy Krill Oyster Clam Herring Shrimp Haddock Mackerel Lobster Octopus Squid Cod Tuna Crab
  • 5. WHAT IS THE STATE OF GLOBAL FISHERIES TODAY?
  • 6. Dire Prediction for the Future http://www.npr.org/templates/story/story.php?storyId=6469061
  • 7. Trend Toward Overfishing 100 80 (millions of metric tons) Catch 60 40 20 0 2000 1950 1960 1970 1980 1990 Year Total World Fish Catch
  • 8. WHAT ARE THE MAJOR FISHING STRATEGIES USED?
  • 9. Fishing Strategies Spotter airplane Trawler fishing Fish farming in cage Purse-seine fishing trawl flap sonar trawl lines fish school trawl bag Fish caught by gills Drift-net fishing Long line fishing float buoy lines with hooks
  • 10. WHAT OTHER TECHNOLOGY IS USED IN COMMERCIAL FISHING?
  • 11. Sonar Unit Used for Fishing
  • 12. Scientists Use Satellites to Track Fish http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/1998/08/05/MN82865.DTL
  • 13. Microwave Telemetry http://microwavetelemetry.com/Fish_PTTs/index.php
  • 14. Monitoring Variables  Storage Capacity of Device  Signal Transmission Strength  Size of Device  Type of Monitor
  • 15. WHAT PROBLEMS ARISE FROM THESE FISHING METHODS?
  • 16. Bycatch  Refers to fish and other marine life caught quot;incidentallyquot; in the pursuit of another species.  Results from use of fishing gear and practices that are not selective.
  • 17. Common Bycatch Organisms  Turtles  Starfish  Sponges  Skates
  • 18. Bycatch Variables  Species  Size  Sex  Quality
  • 19. WHAT LAWS GOVERN GLOBAL FISHING?
  • 20. Magnuson-Stevens Fishery Conservation and Management Act (1976) http://www.mms.gov/eppd/compliance/fcma/index.htm
  • 21. Law Variables  specify a time frame in which to end overfishing and rebuild overfished stocks that is as short as possible  the biology of the stock  the needs of fishing communities  recommendations by international organizations  the interaction of the overfished stock within the marine ecosystem.
  • 22. WHAT ORGANIZATIONS ARE WORKING TO RESTORE GLOBAL FISHING?
  • 23. Marine Stewardship Council http://www.msc.org/html/content_458.htm
  • 24. CAN ARTIFICIAL REEFS HELP RESTORE MARINE ECOSYSTEMS?
  • 25. Artificial Reefs  Concrete blocks  Acres of old cars  Drug transport vessels  Oil Rigs
  • 26. Artificial Reefs Help Dolphins http://archives.cnn.com/2000/NATURE/05/16/hong.kong.dolphins.enn/
  • 27. Artificial Reefs - Cons  Represent an inexpensive way to throw out trash  Cause damage to natural habitats during their construction  Can displace naturally occurring species and habitats  Tend to concentrate fish unnaturally, making them more vulnerable to overfishing
  • 28. CAN AQUACULTURE HELP RESTORE FISH POPULATIONS?
  • 29. Types of Aquaculture  Fish Farming  Fish Ranching
  • 30. Norway’s Fish Farms in Danger http://www.npr.org/templates/story/story.php?storyId=17638050

×