Unit III Eco HW
What steps have been taken to protect the ecosystem in Alaska to protect salmon fisheries?
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Limits on the number of new fishing operations, and monitoring salmon populations |
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Allowing fishing at any time of year instead of just during the summer, and with smaller nets |
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Gave a bonus to fisherman who sell their bycatch, and who kill fewer dolphins |
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Licenses that allow only a specific number of Atlantic Salmon and smaller nets |
Which kind of fish are especially vulnerable to overfishing?
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Catfish |
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Sardines |
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Snapper |
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Crabs |
Which of the following best describes the Marine Stewardship Council (MSC)?
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MSC is a governmental organization responsible for the monitoring of marine ecosystems. |
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MSC is a regulating body that approves design of both fishing techniques and fishing boats. |
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MSC is an organization that certifies seafood from sustainable fisheries. |
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MSC is a non-profit organization that funds marine science research. |
Bycatch greatly affects all but which of the following?
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Marine mammals |
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Sea turtles |
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Krill (an important food source for whales) |
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Sea birds |
How does most of the damage to the seafloor occur through commercial fishing?
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Boat propellers digging into coral reefs |
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Heavy fishing gear that drags across the seafloor |
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Boat anchors that drag along the seafloor |
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Digging organisms no longer having predators to control their populations due to fishing |
What does the acronym MPA represent?
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Marine Protection Association |
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Maritime Protection Area |
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Marine Protected Area |
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Maritime Protected Area |
About how much of the world's total fisheries production is estimated to be illegally harvested?
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77% |
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Half |
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64% |
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One-fifth |
What does an ecosystem approach to fisheries management include?
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A focus on just the keystone species of an ecosystem |
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Licensing fishermen to fish only in specific ecosystems |
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A focus on sustaining whole ecosystems; emphasizing interactions among species in the environment |
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Factoring in the land, the rivers and the oceans |
How are species like dolphins and marine turtles most affected by overfishing?
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They end up with nothing to eat. |
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They are caught in nets as by-catch. |
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They are hit by moving boats. |
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They are canned and sold as delicacies. |
How is the ecosystem most adversely impacted by shrimp fisheries?
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There are fewer shrimp for dolphins to eat |
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There is an extraordinary amount of bycatch |
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Trawlers stir up food for sea birds |
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Invasive shrimp species are introduced to new habitats |
Which is NOT a problem when it comes to escaped farmed species?
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The escapee might compete with natives species for mates |
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The escapee might compete with native species for food |
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The escapee might compete with native species for habitat |
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The escapee might compete with the native species for dissolved oxygen |
Aquaculture can be made more sustainable by:
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raising free range and pen-free salmon. |
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using sustainable feed and raising fish that are not wholly dependent on wild food sources. |
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raising shrimp and salmon in the same system. |
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using genetically modified sources of feed. |
Which seafood organisms might be a better choice for farming and why?
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Mussels and oysters; because they are filter feeder that clean the water and do not need supplemental feeding |
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Bluefin tuna; because of their extraordinary growth rate and high reproductive rate |
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Salmon; because they can eat a wide variety of foods |
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Young eels; because they are small, taking up little space and have low nutritional requirements |
What is the problem with some farmed fish being carnivores?
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They require a wild source of food that must be caught by fishing |
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They will eat one another |
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They can chew through their enclosures |
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Carnivores are less desirable and have a lower market value |
How are wild fish processed and used for something other than human food?
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They are turned into base ingredients for make-up and other beauty products |
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They are processed into fishmeal and fish oil |
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Calcium from fish bones is extracted and used in the production of silicon chip wafers |
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Calcium from fish bones are used to in osteoporosis therapies |
Which two methods are most damaging to seafloor habitat?
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Bottom trawls and dredges |
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Boat seines and pots |
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Boat seines and dredges |
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Pots and bottom trawls |
Which of the following is NOT a way that longlining can be made safer for non-target species?
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Adding streamers |
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Setting lines deeper |
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Using J-shaped hooks |
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Using circle hooks |
Why are fish-aggregating devices (FADs) a problem?
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FADs poison fish that swim near them |
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Whales may inhale them and suffocate |
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FADs are dangerous to sea turtles |
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FADs attract both target and non-target species |
Why is fish farming an issue for wild populations genetically?
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Genetically weaker fish may escape and mix with wild populations |
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Wild fish may get into pens, breed with hatchery fish and take those poor genes to wild populations |
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Wild fish become dependent on genetically inferior feed that falls out of the submersible pens |
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Prey items for wild populations become genetically enhanced due to fewer predators |
Which two aquaculture methods can be carried out inland (away from oceans or large bodies of water)?
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Shellfish cultures and raceways |
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Ponds and recirculating systems |
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Suspended cultures and ponds |
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Open pens and raceways |
Consider at least three seafood items that you, members of your family, or perhaps your friends commonly eat that appear on the Seafood Watch guides. What are they? Are they "best choices", "good alternatives", or ones to "avoid"? Do they perhaps fall into more than one category? If so, why? If not, why might some items fall into more than one category? Be specific and give examples.
Choose the guide for your state or use the national guide: https://www.seafoodwatch.org/seafood-recommendations/consumer-guides [Note: If you, your family and friends do not eat seafood, pretend that you do and respond to the question accordingly.] Your response should be at least 75 words in length.
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