Answer:
Description are given in the explanation section.
Step-by-step explanation:
To find out the casual evidence of space as a limiting factor on the size of a fish population, we need to measure some crucial data. Those are briefly described below:
Color of the water of that space: If the population of the fish increases in any area, the color of the water will be changed. This happens because when the population increases, the respiration rate becomes higher. If enough oxygen isn't present in the water because of the excess amount of carbon dioxide, the color becomes changes into an abnormal one.
Growth of the fish: If the population in any space becomes higher, the growth rate of the fish will be lower. It happens because when large fish feel a lack of food, they feed the small fishes.
No of the fish: If it is found that only large fishes are present in any space and no small fishes are present, it definitely proves that space becomes shorter, and because of this, small fishes are not getting a chance to grow.
The death rate of the fish: If the death rate of the fish population becomes higher suddenly, it proves that the space of the population has become lower. As the population becomes higher, all fishes aren't getting proper oxygen to live.