Our analysis of production and cost begins with a period economists call the short. run. Theshort run in this microeconomic context is a planning period over which the. managers of a firm must consider one or more of their factors of production as fixed.
Sharks have two sets of paired fins on the sides of their body, in the same general position as the main wings and horizontal tail wings of a plane. The shark can position these fins at different angles, changing the path of the water moving around them.
The coloration of sharks is enormously unique and important; not only is it yet another form of protection from their predators, but it also aids them when capturing prey. The dorsal (top) side of a shark is a lighter color than the ventral (bottom) side. This coloration is a type of camouflage called counter shading. When viewed from above, the dark side of the shark blends in with the depths of the ocean. When viewed from below, the light ventral side blends in with the oceanâs surface.