The Art of Mixed Farming
The main objective of mixed fish farming is to make a variety of breeding of fish at the optimum and adaptive farming practices. This has to be taken into consideration a number of key parameters such as diet, mutual competition, fast growth rate, ability to adapt succulents, availability of babies, love of customers etc. For a profitable fish farming, you have to consider the size of the stock of fish and time investment needed.
If they are adequately sown in ponds, before reaching a particular size, they may be dead by a number of reasons. It is best to leave 50 mm sized fish into the pond.
There are types of fishes that feed on the upper part of the pond (like cutla and silver carp) those can be 40%, and 30% of fishes can be intermediate feeder, those feed in the middle section of the pool (Rohu), select rest of the type fishes which will be staying at the pool bottom (mrunghal and common carp). The ratio of mixed fish using for farming, Cutla, silver carp, rohu, grass carp, mrunghal and common carp should be 15: 25: 20: 10: 15: 15.
The amount of fish you can put in a pound is depended upon the biochemical conditions. Up to 8,000 to 10000 hectares of fish may be released in a fish pond, according to biochemical condition present.
To check, if the water has some kind of poison mixed in it, keep few fry (Baby fish) in the pound for 24 hours. If they are alive it’s good to go.
Also, while leaving the fry into the water, water should be in the cooler atmosphere. The temperature of the water and the difference in water’s physical properties can cause the death of entire fishes.
To avoid this, the fishes should be let down in a water in a plastic bottle or cover and let the fish slowly swim into the water.
Supplement foods for fishes directly or indirectly help to increase the pulmonary biogenic potential of the pond. There are certain criteria for selecting Supplements. First of all, it must be acceptable for fish. Secondly, it should be easily digested and have a low feed conversion ratio. In addition, the cost should be low and should be easily available on-demand.
Commonly vegetarian and non-vegetarian artificial foods are used as fish feeds. Commonly used vegetable fish farming feed are Grass, tubers, roots, starch, cane, bran (paddy, wheat, soybean). The long list of artificial non-vegetarian foods includes silkworm, freshwater saline fishes, fish meal, eggs, prawns, crab, residues in the abattoir, cocaine, and so on.
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The vegetable fish dish usually given as a powder, soaked in water, dried or cooked. Rice Cakes, bran should be doped down in water for a long time. In India, barn (rice, wheat) can be given in a ratio of 1: 1. Provide artificial feeding up to one to two percent of the total weight of the fish present in the pond.
Before giving artificial feed the following should be noted :
(1) The feed given should be eaten before the next supply.
(2) Distribute artificial food at morning
(3) It is better to deposit the food in a fixed bowl in a particular place, instead of scattering everywhere on the water.
(4) Hygiene places should be selected to provide food. It is advisable to change the distribution area at certain intervals to break down the food.
(5) It is not advisable to change from one artificial food immediately and start another. 20 gm of feed (10 gms of piglets and 10 grams) per day for one kg of fish. After 6 months, the rate of feed may be reduced to 15% and reduced to one percent after 9 months.
The growth of the fish can be divided into three phases. The growth rate in the first and last phases will be very low. Meanwhile, growth in the middle ages will accelerate. There are many things to be taken for harvesting. Fish weight should be tested before harvesting. The use of fish and the value of the fish increases with some special days and occasion. It is generally estimated that from 2000 to 2500 kgs of fish per hectare a hectare.
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