Importance of Fish Migration

Many types of fish undertake migrations on a regular basis, on time scales ranging from daily to annual, and with distances ranging from a few meters to thousands of kilometers. The purpose usually relates to either feeding or breeding; in some cases the reason for migration is still unknown. Factors Influencing Migration Factors like physical, chemical and biological factors influence the migrations in fishes. Physical factors like depth of water, temperature, light, turbidity, photoperiod, penetration, velocity of current may cause migration. Chemical factors like pH and salinity.

Importance of Fish Migration
There are several types of migration found in different types of fish species.

The types are:

  1. Latitudinal Migration
  2.  Vertical Migration
  3.  Spawning Migration
  4. Feeding Migration
  5. Overwintering Migration
  6. Shoreward Migration.

Fish migration is necessary for the success and prosperity of aquatic life. Fresh water fish migrate between their feeding and spawning regions. As fish migrate, they produce necessary oxygen for the other aquatic life in the river.

By – Anil Bisht
Zoology Department
Uttaranchal (P.G.) College Of Bio-Medical Sciences & Hospital