Question

A scientist is evaluating a proposal for raising large numbers of fish in ocean pens for human consumption. As part of the evaluation, the scientist is designing a plan for investigating how the fish in the ocean pens might affect nearby ecosystems. Which of the following is the most appropriate factor to use as the dependent variable in the experimental investigation?

Answer 1

The correct answer is: The amount of metabolic wastes in the water where the fish are being raised

Step-by-step explanation:

It is very important in aquaculture that the amount of metabolic wastes be controlled, specially the solid ones, due to the fact that once that they decomposed in the water they can increase the amount of nitrogenous compounds and some other molecules. Therefore, this process could really affect as well the amount of oxygen in the water, stressing animals and plants and even leading them to death.