Q.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 photoperiod. Discuss
b. Polyculture of fishes is of great importance.
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Start your 14-day free trial to unlock the full solution →Step 1 (part a). Poultry, especially layer breeds, are photoperiodic: increasing day length (or artificial lighting extending the 'daylight' period in a poultry house) stimulates the hypothalamus-pituitary axis to release more reproductive hormones, which in turn increases the rate of egg-laying — this is why commercial layer farms often use supplemental lighting to keep hens laying through shorter winter days.
Step 2 (part a). Conversely, shorter day length reduces this hormonal stimulation and lowers egg output, which is why the chapter's broader poultry-farming section stresses controlling light as one of the basic housing parameters for a productive farm.
Step 3 (part b). Composite fish farming (polyculture) stocks several compatible fish species together in the same pond in proper proportion — for example Catla catla (a surface feeder), Labeo rohita and Cirrhinus mrigala. …
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