Answer:
Density is nearly 3 cabs per hectare
Explanation:
Given -
There are three three intertidal regions.
Area of each intertidal region is [tex]2[/tex] hectares.
Number of crab in the intertidal regions are as follows -
Intertidal region I - 7
Intertidal region I - 2
Intertidal region I - 6
Sum of crabs in all three regions is equal to
[tex]7 + 2+ 6\\= 15[/tex]
Total area of all three intertidal regions is equal to
[tex]2 + 2+ 2\\= 6[/tex] hectares
Now density per hectare is equal to total population of crab divided by total area of all the three intertidal regions
Density [tex]= \frac{15}{6} \\= 2.5[/tex]
Density is nearly 3 cabs per hectare
