Download presentation
Presentation is loading. Please wait.
Published byJuniper Conrad Johnson Modified over 9 years ago
1
Figure 17.2
2
Figure 17.3
3
Marine Fisheries and their Uses I. Food(1% of all food eaten) Finfish (“fish”) 84% total worldwide catch, 16% of animal protein consumed by humans Shellfish: molluscs and crustaceans Other marine food: sea cucumber, jellyfish, polychaete worms, sea urchin roe, algae II. Industrial fisheries (not for direct human consumption) Herring, sardine, anchovies (schools of plankton feeders- largest catches in the world, one third of world total) Uses: fish meal for chicken feed; oil for margarine, paint, & cosmetics; petfood; fertilizer. Marine fisheries are overexploited: Worldwide catch of seafood stabilized in 1980s
4
Figure 17.4
5
Gill net Purse seine trawls longline Drift nets Tuna, other fish Tuna & large schools of small plankton feeders - herring, anchovies Tuna, other fish Shrimp, cod, hake, haddock fish
6
How much fish to catch and not kill off the fishery? Catch limits set by managers: Based on Maximum Sustainable Yield Goal: keep “stock” of fish at a constant, “healthy” size
7
Figure 17.10 Catch- effort curve
10
Tsukiji fish Market, Tokyo 1 million tons sold per year 1 million sea creatures for sale each day “Wild-caught” game Caught with high tech capture techniques
11
Tuna Dolphin-safe tuna? US Fishermen: 1970s 200,000 dolphins/year killed 1995 < 20,000 “““
12
“Dolphin safe”? Purse seines vs. “Log” Fishing for Tuna 1000 set nets: 500 dolphins 52 Billfish 10 sea turtles 0 sharks 1000 nets using logs: 2 dolphins 654 billfish (swordfish, marlin) 102 sea turtles 13,958 sharks
13
APPETIZERS & SALADS New England Clam Chowder $5.50 oyster crackers Grilled Ahi Tuna Salad Pad Thai $9.00 with sticky rice and chilled vegetables ENTRÉES Spinach Pasta $14.00 artichoke hearts, wild mushroom pesto, red swiss chard, fresh mozzarella Grilled Arctic Char $19.00 king crab compound butter, fried leeks, steamed rice, sauteed vegetables Rotisserie Chicken $15.00 Pan Roasted Carrots and Beets with honey and mint, mashed potatoes and rutabagas. Grilled Ahi Tuna $19.00 shiitake mushroom butter sauce, soft parmesan polenta, sauteed spinach Menu
14
Galapagos
29
New law on Galapagos No new settlement unless you are related to current resident New national school curriculum Schools must teach about local habitat and value
30
Gulf of California, Mexico and Galapagos, Ecuador Sub-tropical, temperate climate/sea Desert coast Many rare species and endemic species (found no where else) Panamic origin for many of marine species Developing countries with great natural beauty/rich fisheries Conflict tourism and fisheries Population increase and settlement Sea cucumber fishery (violence in Galapagos) Murex snail fishery
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.