Question

Both fish and birds must overcome the forces of drag for efficient locomotion. Identify the two types of drag that both the fish and birds must overcome as they move through water and air, respectively. How do both the shape of a fish and the shape of the wing (think cross section) represent a compromise between these two types of drag?

Answer 1

FISH AND BIRD-LOCOMOTION

The Fish and Bird, both can undergo locomotion in the aquatic rich area.

The locomotory organ for fish is the tail and caudal fin. The locomotory organ for Birds is Wings.

The locomotion process by fish:

The dragging force is applied against the water and air force by fish in terms of moving their tail back and forth and by flexing their body. This makes them move through the water. Fish uses the back fin to push the water.

The fins are responsible for moving forward, turning back, keep the upright position, and stoping.

The flying fish use the pectoral fins for gliding.

These fins act like impeller in order to move forward. They drag themself forward with force and actively move.

The Birds Locomotion

The Birds can also swim well. Bird-like penguins are found to be moving or gliding in water easily. The wings of penguins which are like propellers or flippers make them easily move in the water. These wings can easily face or drag against the heavy water and air force. These wings are not used on land rather in water. The ducks use their webbed feet in order to move in the water. The webbed feet make duck to paddle and swim in water smoothly.

The duck uses the webbed feed to paddle in water.

Both the fish and Bird drag in water by using their specialized locomotory organ. The force applied to overcome the water and air resistance is extensive by their locomotory organ either in terms of paddling, the impelling effect, or gliding or stretching the body muscles. They use all different strategies to overcome the resistance. The fish can easily move forward, backward, and position upright and downwards using the fins whereas penguins use their wings(impellers or flippers) to move as fast as possible to prey on other small fish.