What is the economic importance of mosquitoes?

Answer 1

In some countries, insects are used as food, so that would help the economy by giving people a free food source. In many places, insects can hurt the economy by eating crops that people are growing for food.

Answer 2

As food:

Man, consumes a large number of crustaceans especially the lobsters, shrimps, prawns, crabs and crayfishes etc. They form an important diet for man with great nutritive value. The blue http://wiki.answers.com/q9773567.htmlis held captive until it molts, then sold in the soft-shelled condition, after removal of the viscera the whole animal is cooked and eaten. Prawn fishery, which means capturing as well as culturing them, has advanced in many countries including Pakistan.

http://wiki.answers.com/q645170.htmlfood chain Component

The smaller species of crustaceans form the bulk of the zooplankton, which plays a vital role in the food chains of both salt and freshwater fishes and other aquatic animals that eventually come to our table.

As Fish bait

In most parts of America, the crayfishes, especially the soft-shelled individuals, are quite popular among fisherman as fish bait. Soft-shelled individuals are kept soft for a week so on ice since http://wiki.answers.com/q2387916.htmlslows metabolism so that the shell develop slowly.

As scavenger

Some, crustacean, such a crayfish are beneficial, as they serve as an agency in the destruction of decaying vegetables and animal bodies in water.

Answer 3

They spread disease, causing people to lose work (or their lives).