Question

why should fishery managers not view cod stocks as separate from other fish stocks such as capelin and mackerel?
a. these fish species all form schools together and are therefore caught together.
b. capelin and mackerel both compete with cod for ocean floor habitat.
c. these populations of these fish species are all related through the ocean food web.
d. there is no reason for fishery managers not to view cod stocks individually.

Explanation:

In an ecosystem, different species are interconnected. The ocean food web shows relationships like predation and competition. Cod, capelin, and mackerel are part of this web. Their populations affect each other. For example, if capelin (a food source for cod) decline, cod may be affected. So, they can't be viewed in isolation. Option a is incorrect as forming schools isn't the main ecological reason. Option b is too narrow as it only mentions habitat competition. Option d is wrong as there is a valid ecological reason.

Answer:

C. These populations of these fish species are all related through the ocean food web.