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Floating Fishes: an activity investigating overfishing, buoyancy, and gas compressibility .

Floating Fishes: an activity investigating overfishing, buoyancy, and gas compressibility . Donovan P. German 1 and Doris Raven 2 1 Department of Zoology, University of Florida 2 Howard Bishop Middle School, Gainesville, FL. PowerPoint Extras.

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Floating Fishes: an activity investigating overfishing, buoyancy, and gas compressibility .

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  1. Floating Fishes:an activity investigating overfishing, buoyancy, and gas compressibility. Donovan P. German1 and Doris Raven2 1 Department of Zoology, University of Florida 2 Howard Bishop Middle School, Gainesville, FL PowerPoint Extras

  2. The next two slides were provided to show the materials and children enjoying the activity.

  3. The next three slides were provided for introductory material into fish anatomy and swim bladder location. Some illustrations of swim bladder expansion are also included.

  4. Physostmous swim bladder: connects to gut Physoclistous swim bladder: connects to circulatory system www.jochemnet.de/.../ BSC1011_17/sld006.htm

  5. The next four slides were provided as evidence of commercial fisheries and the amount of fish they catch at one time. Photos were also included of by-catch to illustrate the graphic nature of commercial fishing. Make note that by-catch levels range from 2:1 (by-catch:target species) to greater than 10:1. Note the diversity of fishes in the last slide of this section.

  6. Bycatch: what is it? Any “non-target” species that is considered undesirable by the the fisherman. Can bycatch survive?

  7. The next (and final) slide was provided to show a fish card and illustrate how they work. It is best to have internet access on the computer you are using to present this material so that you can use the card. Simply click on a fish name and you will be taken to a website about that fish, which will include its status as a fishery and whether it should be eaten.

  8. Catfish (Farmed) Caviar (Farmed) Clams (Farmed) Crab, Dungeness Crab, Snow (Canada) Crab, Stone Halibut, Pacific Lobster, Spiny/Rock (U.S.,Australia) Mussels (Farmed) Oysters (Farmed) Salmon (AK wild-caught) Sardines Shrimp/Prawns (trap-caught) Striped Bass (Farmed) Sturgeon (Farmed) Tilapia (Farmed) Trout, Rainbow (Farmed) Tuna , Albacore (troll/pole-caught) Tuna, Bigeye (troll/pole-caught) Tuna, Yellowfin (troll/pole-caught) Clams (wild-caught) Cod, Pacific Crab, Blue Crab, Imitation/Surimi Crab, King (AK) Crab, Snow (U.S.) Flounder, Summer/Fluke Lobster, American/Maine Mahi Mahi, Dolphinfish/Dorado Oysters (wild-caught) Pollock Scallops, Bay Scallops, Sea Shrimp/Prawns (U.S. farmed or U.S. trawl-caught) Sole (Pacific) Squid Tuna (canned) Tuna, Albacore (longline-caught) Tuna, Bigeye (longline-caught) Tuna, Yellowfin (longline-caught) Caviar (wild-caught) Chilean Seabass/Toothfish Cod, Atlantic/Icelandic Crab, King (Imported) Flounders, (Atlantic) except Summer/Fluke Groupers Halibut, Atlantic Monkfish Orange Roughy Rockfish / Rock Cod/Pacific Snapper (Pacific) Salmon , (farmed, including Atlantic) Sharks Shrimp (imported) (farmed or trawl-caught) Snapper, Red Sole (Atlantic) Sturgeon (wild-caught) Swordfish (U.S. Atlantic and imported) Tuna, Bluefin Making choices

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