What might be one possible reason for the greater fluctuations in the blue crab population?

Blue Carb which scientifically is known as " Callinectes sapidus" is a type of vertebrates. A possible reason for the fluctuation in their population can be the eutrophic dead zones in the Chesapeake Bay which naturally cases low levels of oxygen dissolving into the Bay leading to fluctuation of Blue crab population.

Another reason also can be the shorter life span of blue crab, its average life span recorded is one to three years which is very short in comparison to striped bass, although some blue crabs are caught after being tagged at the age of 6 to 8 years as well.