Marine Biology Chapter 7 - Harvesting the Ocean Exam
Questions and Answers With complete solution–Expert
Verified | Latest Questions 2025-2026
What is the significance of fish as a food source for the world's population? - Fish are an
excellent source of protein and provide nutrition for countless people.
What impact have past waste disposal practices had on the fishing industry? -
Pollutants flushed into the oceans have destroyed productive fisheries.
What is the estimated number of fish species inhabiting the oceans? - Over 15,300
types of fish.
What percentage of the world's calorie needs is supplied by the ocean? - About 2
percent.
What are the primary types of fishing gear used by fishermen? - Traps, fishing lines with
hooks, and various types of nets.
Name three popular types of commercial fishing nets. - Purse seiners, gill nets, and
trawling nets.
What fishing technique is named after the type of gear used? - Examples include gill
netting, longlining, and purse seining.
What is the stern trawling method used for? - To haul and tow nets over a stern ramp.
At what depth are most ocean living creatures found? - Within the first 600 feet (180 m)
of the sea.
Which fish are commonly harvested close to the ocean surface? - Sardines, tuna,
anchovies, mackerel, and herring.
Which fish are typically caught near the ocean floor? - Pollock, flounder, and cod.
What is the size of some fully extended trawling nets? - Almost 250,000 square feet
(23,000 square meters), equivalent to five football fields.
How do diesel-powered shrimp trawlers operate? - They tow their nets from distinctive
booms swung out from either side of the boat.
What is the purpose of using dredges in fishing? - To drag large steel cages over the
ocean floor to harvest bottom-dwelling fish or shellfish.
, What is the yearly catch of herring in the North Pacific and North Atlantic? - Over a
million tons.
What proportion of the fish caught is used for human consumption? - Almost eight out of
ten fish.
What are menhaden and anchovettas used for? - Fertilizers, glue, and pet and livestock
food.
What was the peak world fish catch in 1994? - A little over 63 million tonnes.
How much fish was landed globally in 2011? - 53.1 million tonnes.
From which ocean is one-quarter of the world's yearly fish catch taken? - The Atlantic
Ocean.
Which region is noted as the most productive for fish catches? - The North Atlantic.
Why is fishing considered one of the deadliest occupational fields? - Due to the inherent
dangers and risks associated with fishing activities.
What technology is commonly used in drift net or gill net fishing? - Aircraft and
electronic detection devices.
How long can drift nets be? - Each net may be 3 nautical miles (5,500 meters) long.
What types of fish are commonly caught using drift nets? - Herring, billfish, tuna, squid,
and shark.
What is the primary method of capturing lobster and crab in commercial fishing? - Using
traps or pots baited with portions of fish.
What are the conditions faced by fishing boats off Alaska's coast? - Cold and
dangerously pitching waters.
What is the weight range of the pots used in crabbing? - 700 to 800 pounds when
empty.
What is the most dangerous method of commercial fishing? - Crabbing.
Why is it important to process fish quickly after catching? - To prevent rotting, as dead
fish decompose rapidly.
What is the significance of the Pacific Ocean in global fishing? - It provides over half of
the world's catch of fish.
Questions and Answers With complete solution–Expert
Verified | Latest Questions 2025-2026
What is the significance of fish as a food source for the world's population? - Fish are an
excellent source of protein and provide nutrition for countless people.
What impact have past waste disposal practices had on the fishing industry? -
Pollutants flushed into the oceans have destroyed productive fisheries.
What is the estimated number of fish species inhabiting the oceans? - Over 15,300
types of fish.
What percentage of the world's calorie needs is supplied by the ocean? - About 2
percent.
What are the primary types of fishing gear used by fishermen? - Traps, fishing lines with
hooks, and various types of nets.
Name three popular types of commercial fishing nets. - Purse seiners, gill nets, and
trawling nets.
What fishing technique is named after the type of gear used? - Examples include gill
netting, longlining, and purse seining.
What is the stern trawling method used for? - To haul and tow nets over a stern ramp.
At what depth are most ocean living creatures found? - Within the first 600 feet (180 m)
of the sea.
Which fish are commonly harvested close to the ocean surface? - Sardines, tuna,
anchovies, mackerel, and herring.
Which fish are typically caught near the ocean floor? - Pollock, flounder, and cod.
What is the size of some fully extended trawling nets? - Almost 250,000 square feet
(23,000 square meters), equivalent to five football fields.
How do diesel-powered shrimp trawlers operate? - They tow their nets from distinctive
booms swung out from either side of the boat.
What is the purpose of using dredges in fishing? - To drag large steel cages over the
ocean floor to harvest bottom-dwelling fish or shellfish.
, What is the yearly catch of herring in the North Pacific and North Atlantic? - Over a
million tons.
What proportion of the fish caught is used for human consumption? - Almost eight out of
ten fish.
What are menhaden and anchovettas used for? - Fertilizers, glue, and pet and livestock
food.
What was the peak world fish catch in 1994? - A little over 63 million tonnes.
How much fish was landed globally in 2011? - 53.1 million tonnes.
From which ocean is one-quarter of the world's yearly fish catch taken? - The Atlantic
Ocean.
Which region is noted as the most productive for fish catches? - The North Atlantic.
Why is fishing considered one of the deadliest occupational fields? - Due to the inherent
dangers and risks associated with fishing activities.
What technology is commonly used in drift net or gill net fishing? - Aircraft and
electronic detection devices.
How long can drift nets be? - Each net may be 3 nautical miles (5,500 meters) long.
What types of fish are commonly caught using drift nets? - Herring, billfish, tuna, squid,
and shark.
What is the primary method of capturing lobster and crab in commercial fishing? - Using
traps or pots baited with portions of fish.
What are the conditions faced by fishing boats off Alaska's coast? - Cold and
dangerously pitching waters.
What is the weight range of the pots used in crabbing? - 700 to 800 pounds when
empty.
What is the most dangerous method of commercial fishing? - Crabbing.
Why is it important to process fish quickly after catching? - To prevent rotting, as dead
fish decompose rapidly.
What is the significance of the Pacific Ocean in global fishing? - It provides over half of
the world's catch of fish.
