P1B Oceans - Biotic resources

The term used to describe any unwanted organisms caught in a net and that are thrown back in the ocean.

• catch-of-the-day

• fish-of-the-day

• bycatch

• bait-fish

If overfishing of the oceans continues, what may be the only type of organisms that will be left in the oceans

• sharks

• catfish

• dogfish

• jellyfish

What percentage of species of ocean fish can be said to be over-fished?

• 90%

• 50%

• 30%

• 13%

Why are the fish that are now being caught smaller than decades ago?

• Evolution made them smaller to escape through net openings

• Small fish young and fast enough to escape

• People prefer the taste of young fish because old fish tends to be stringy.

• There are very few large fish left in the oceans

Choose the most correct statement about the distribution of fish in the oceans.

• The most dense fish populations occur along coastal areas

• The most dense fish populations occur in the deep oceans far from land

• The most dense fish populations occur where upwellings bring nutrients to the surface

• Fish populations are evenly spread out in the oceans

Which of the following is not an example of biotic resources?

• whales

• seaweed

• sharks

• seabird droppings

The most accurate definition of aquaculture

• The raising and harvesting of fish and other marine and freshwater organisms.

• The fattening of wild fish before they are harvested

• The raising and harvesting of fish and other marine organisms.

• A culture like that of Japan where most protein comes from the oceans

Choose the incorrect statement about modern fishing techniques

• Fish are lured to an area by using sound to attract them.

• Magnetic fields are used to disorientate migrating fish

• Bright lights are used at night to attract and catch fish

• Spotter aircraft and drones are used to find schools of fish