The aerodynamic shape and lightness of the blue shark body allow itto move “elegantly” across the oceans. It exhibits countershading likemany other sharks. The upper part is an indigo blue tone while theventral and the sides are white.
It has a long caudal heterocercal fin. The second dorsal fin measuresalmost half the size of the first and its pectoral fins are unusuallylong compared to other sharks. Its eyes are large, its teeth aretriangular, and it has a conical snout.
It reaches a length ranging from 3.8 to 4 meters and weighs about 240kilograms. This species presents slight sexual dimorphism since thefemale tends to measure little more than 1 meter in comparison with themale.
B) density-dependent factor
C) population-dependent factor
D) population-independent factor
The correct option is A.
A density independent factor refer to a weather or climate condition, which exert its influence on a population size without regard for the size of the population and its density. Limiting factor refers to any factor that put a limitation on the growth, abundance or distribution of a population. In the question given above, the Hurricane Katrina is a density independent factor because the hazardous event affected all the people that are resident in the affected areas.