Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

تمرين 4

Define fishery. What are three major harmful effects of overfishing Describe the effects of trawler fishing, purse-seine fishing, long-lining, and drift-net fishing. What is bycatch What is a fishprint Summarize the story of the collapse of the Atlantic cod fishery. Explain why the Atlantic bluefin tuna is seriously endangered. Explain how marine mammals are threatened by overfishing and give an example. Summarize the story of jellyfish invasions. Summarize the arguments for protecting sharks. About what percentage of marine species and what percentage of freshwater species are in danger of extinction