Fishing and Aquaculture

Which type of fishing has high rates of bycatch and highly destructive of benthic communities.

• Pole Fishing

• Long Line Fishing

• Purse Seining

• Trawling

type of fishing has the lowest rates of bycatch.

• Pole Fishing

• Long Line Fishing

• Purse Seining

• Trawling

The graph above shows the change in Canada’s harvest of Atlantic Cod from 1950-2004. What change occurred between 1992-1993?

• The stocks of Atlantic Cod collapsed.

• Harvests of Atlantic Cod rapidly decreased.

• Canada declared a moratorium to all cod fishing in Newfoundland and Labrador.

• All of the above.

The loss of the Atlantic Cod around Newfoundland occurred because those fisheries were…

• Underexploited

• Fully exploited

• Overexploited.

• None of the above.

What position on the food chain do fish like Atlantic Cod and Bluefin Tuna occupy?

• TL2

• TL3

• TL4

• TL5

What kind of Marine-Trophic Index would you expect to have seen in the cod fisheries during the peak harvests in the 1950s and 1960s?

• Low, between 1.0-2.0

• Moderate, between 2.1-3.5

• High, between 3.6-5.0

• It would randomly vary between each year.

Which is true about aquaculturing?

• The amount of aquacultured fish has decreased significantly in favor of wild-caught fish.

• Aquaculturing requires the same inputs as other forms of animal agriculture, including feed and antibiotics.

• Aquaculture operations do not affect the surrounding ecosystem in any adverse way.

• All of the above are true.

The Swordfish has an MSC Certification label on it. What does this mean?

• The fish is certified to be organic and free of pesticides and antibiotics.

• The fish comes from a facility that follows sustainable fishing practices.

• The fish was not harvested using any form of seining, netting, or trawling.

• The fish came from a Marine Reserve.

8. The yellowfin tuna, as shown in the signs above, is marked as “avoid” through the Seafood Watch program. Which of these is a possible reason why?

• The fish were harvested exclusively through the use of pole fishing.

• Stocks of the fish are unusually high.

• The rate of bycatch may be high.

• Each of these is a possible reason.

Which of these animals would be protected by the Marine Mammal Protection Act?

• A shark living in international waters.

• A dolphin living in the territorial waters of Brazil.

• A beluga whale living in the exclusive economic zone of the United States.

• A cod fish living off the coast of Alaska