Business idea - crayfish

Natural habitat of the giant freshwater prawns covers all the countries of South-East Asia from India to China, as well as the islands of Oceania and North Australia. The main habitats - and lower reaches of the river estuaries. For spawning (spawn) shrimp dipped in freshened the mouth of the marine areas, and larval development of its happening in brackish water. Optimal for breeding, nutrition and growth of the giant freshwater prawns is water with a temperature of 28-30 degrees C, at 20 degrees C, it ceases to eat, and below 13 C begins her death.

During its development the larvae are 12 stages, each of which lasts about three days and ends линькой. After the last larval stage is molto metamorphosis in larva, which also often fade and grow quickly. With age, the frequency of sheds is reduced.

Molto - a critical period in the life of shrimp, accounting for the maximum of their death. At this time shrimp become sensitive to all unfavorable abiotic factors and more accessible to cannibalism and predators.

In our experiments, when the content in the ponds of the shrimp reach sexual maturity at the age of 4-5 months, females with a length of 72 - 105 mm and a weight of 4 - 10 g, and males respectively 89 - 95 mm and mass of 10 to 12 g. After puberty because of the large energy costs associated with the produces caviar, the growth of females somewhat slows down. In contrast to females, males have a higher growth rate and after puberty.

With nine months of age giant freshwater prawn and can reach a weight of 100 - 120 g, to a year - 140 - 150 g, and sometimes 200 g the Maximum size of the females - 200 g, the length of 283 mm, the males, respectively, 250 g and 326 mm. At the same time, the weight and size of the shrimp even in the same litter is a very big difference.