Question

Stickleback are fish found commonly in Alaska. They are easy to recognize because they have a distinct red patch of color on their throats. Males are territorial and build their nests in the territories, which are located in the shallow regions of lakes (around the edges). There are no territories in the deepest parts of the lake. In the shallows, males engage in agonistic behavior to maintain their territory boundaries. When two males from rival territories come into contact with each other they flash their red colors at each other. In some cases, these flashes are followed by one male swimming away from the other. In other cases, the flashes are followed by fights between males.

61. Which of the following terms describes the pattern of dispersion that occurs in the shallow regions of the lake where males possess territories (i.e., the shallow-region scale)? a) clumped

b) uniform

c) random

62. Which of the following terms describes the pattern of dispersion that occurs at the whole-lake scale?

a) clumped

b) uniform

c) random

Answer 1

Sticklebacks are only found in the shallow region because over their they can maintain their territorial behaviour. On the other hand, in the deep region they can't survive leaving us with no territories.

61. The pattern of uniform dispersion describes the situation of shallow region scale best. When we are handling the shallow region separately, we see that the individuals of the fishes are spaced out evenly which is a feature of uniform dispersion.
Answer- Uniform dispersion

62. The pattern of clumped dispersion describes the scenario of the stickbacks in the deep region scale. This is because in the clumped dispersion, clustered organisms are found in certain part whereas it is absent in the other part. This is the case for deep regions because the fishes are abundant and clustered in the shallow region and absent in the deep region.
Answer-Clustered dispersion.