Animal husbandry is the science of rearing, feeding and caring, breeding and disease control of animals. It ensures supply of proper nutrition to our growing population through activities like increased production and improvement of animal products like milk, eggs, meat, honey, etc.
a. Poultry production depends upon the photo period. Discuss

Explanation

(a) Light is an important aspect in the poultry production. Light stimulates the secretion of FSH and LH. The wavelength between 400 and 700 nm is required. The decrease in the photoperiod will affect the egg production.
(b) A few selected fishes belonging to different species are stocked together in proper proportion in a pond. This mixed forming is termed as composite fish farming or polyculture. It is of great importance because
(a) All available riches are fully utilized
(b) Compatible species do not harm each other
(c) There is no competition among different species