Chapter 11 Questions Chapter 11 Question 1 Describe the collapse of the cod fishery in the northwest Atlantic and some of its side effects Collapse: The overfishing through Industrial fish harvesting methods caused the collapse of Cod in the Northwest Atlantic in 1992. Side effects: Severely damaged New Finland?s economy, 20,000 fishermen out of work, Cod population still has not recovered, lead to collapse of other species such as sharks. Describe the effects of trawler fishing, purse-seine fishing, longlining, and drift-net fishing. Trawler fishing: Used to catch fish and shellfish that live on or near the ocean floor. Involves a funnel-shaped net along the ocean floor. Destroys ocean floor habitats.