Write the scientific name of Muga Silkworm. Mention two host plants of Muga Silkworm.

The scientific name of the Muga silkworm is Antheraea assamensis . It belongs to the family Saturniidae. Muga silkworm is found in Assam in northeast India where 99% of its production occurs. Muga silkworms are polyphagous but thrive primarily on two host plants, Som ( Persea bombycina ) and Soalu ( Litsaea polyantha Juss ).

What is Pisciculture? Write the various types of ponds.

A pisciculture is a form of aquaculture which is the scientific rearing and management of all aquatic animals. It is the main type of aquaculture whereas other methods can fall within the framework of mariculture. The types of ponds for fish culture fish farm requires different types of the pond for the various developmental stages of fish growth. They are: Breeding pond: Healthy and sexually mature male and female fishes are collected and introduced into this pond for breeding. The eggs released by the female and fertilised by the sperm and fertilised eggs float in water as a frothy mass. Hatchling pits: The fertilised eggs are transferred to hatching pits for hatching. Nursery ponds: The hatchlings are transferred from hatching pits after 2 to 7 days. The hatchlings grow into fry and are cultured in these ponds for about 60 days with proper feeding till they reach 2-2.5 cm in length. Rearing ponds: Rearing ponds are used to culture the fry. The fish fry is transferred from the nursery pond to rearing ponds and is maintained for about three months till they reach 10-15 cm in length. In these rearing ponds, the fry develops into fingerlings. Stocking pond: The stocking pond is also called a culture pond or production pond. These ponds are used to rear fingerlings up to the marketable size. Before releasing the fingerlings, the pond is mature and inorganic fertilizers.