Chapter 19 Resources From The Sea

one nation whose annual catches have not significantly decreased since the late 1980s:

China

which of the following is an example of genetic engineering?

changing the number of chromosomes in organisms

Offshore oil is drilled mostly from:

continental shelf

desalination plants:

convert seawater into fresh water

Fisheries management involves all of the following, except:

determining the commercial value of each catch

Clupeoid fishes are least likely to be used in what way?

direct consumption

in mariculture, seeding refers to:

enrich populations by releasing fish that have been farmed

the largest fish catches are those of:

herrings, sardines, and other clupeoid fishes

which of the following is a likely consequence of aquaculture?

higher chances of disease spreading

the maximum sustainable yield is best defined as the:

highest catch that can be taken without overfishing

which of the following is not a problem caused by the farming of salmon?

increase in the price of salmon

by-catch refers to which of the following?

junk species

which of the following best describes commercial fisheries around the world

most have been affected by overfishing

other than manganese, polymetallic nodules contain relatively large amounts of:

nickel

which of the following is an example of non-renewable marine resource?

oil

potential sources of energy that can be obtained from water include all the following except:

polymetallic nodules

releasing farmed salmon fry to grow at sea then harvesting them when they return to hatchery:

salmon ranching

dermersal catches are those that are harvested from:

the bottom

most marine food resources are harvested from:

the continental shelf

Pelagic catches are those that are harvested from:

the open water

which requires federal fisheries managers to develop management plans to prevent overfishing?

Sustainable Fisheries Act

a fishery is regarded as collapsed when catches fall below what percentage of historic highs?

10%

the EEZ of a nation is defined as being equal to how many nautical miles?

200

finfish, and fish-farming provide what percentage of animal protein consumed around the world?

30%

trawls are nets that:

are dragged along the bottom or through the water column

which of the following is an argument against the usage of these biofuels?

burning biofuels still release CO2, a greenhouse gas

fish effort refers to all of the following, except:

the size of the catch

which of the following is generally true of small-scale fisheries?

they use relatively simple gear and methods

which of the following is a renewable marine resource?

tidal energy

In the United States, marine catches are managed by:

transplanting artificially reared young, limiting the number of boats or fishers permitted, limiting the length of the fishing season (ALL OF THESE ANSWERS ARE CORRECT)

cods are demersal, they are likely to be caught commercially using which method?

trawls

the richest fishing areas of the world are mostly located in waters:

where coastal upwelling takes place

continued catches above the maximum sustainable yield:

will result in overfishing and crash of fish populations