Some of the factors that can affect the value of FCR are as follows

Some of the factors that can affect the value of FCR are as follows:

1. Quality flyblow Shrimp
Until now, there are no technology that is really appropriate to view the standardization of quality flyblow the prime quality. Observations physically can not give assurance that good quality flyblow. Flyblow shrimp produced from the hatchery with a high temperature treatment and drug use drugs seems healthy, but after benur spread out in the ponds death often occurs. Flyblow that during the maintenance get too many drugs, some organs may become damaged, so the use of the feed is not efficient. Thus, in order to feed can be absorbed with good and efficient, flyblow tebar that we should really have a good quality.

2. Quality Food
Quality of food holds an important role in improving the business value of FCR. So many shrimp feed producers with a diverse brand that we do not know the exact quality. Shrimp feed producers must use the results of laboratory testing of the quality of feed to test all the raw materials used, so that the feed is the feed produced with superior quality that can help farmers to get good value FCR. Farmers should also decide the exact type of feed that will be used, which have been tested try with good results. Some things that need to be taken by the farmers ponds in the selection of shrimp feed with good quality are:
1. Products derived from the company that has the support of both the research and development of the strong.
2. Food that is used has been tested by the farmers themselves try with the result that both FCR, growth and good harvests constant.
3. Have the charm and smell that attracts the shrimp.
4. Have good stability in water.
5. Feed in the packaging.
Quality of food easily damaged if not placed correctly, insects and rodents can also cause a loss of some food. Below are some guidelines to keep food to maintain good quality food:
 Food should be stored in a dry place and in the area of ventilasinya enough. When a wet room, the food will decay quickly. A cold storage, need adequate ventilation to keep the temperature in the oxygen feed.
 Food prepared and are limited to the top of the timber separator with the amount of not more than 5 Zech, so there is enough air circulation between Zak Zak-food so that the humidity and temperature in normal circumstances.
 Food should not be placed directly on the floor or wall of the room sets. The surface of the wall is usually more than the surrounding cold. Therefore, part of the food Zak direct contact with the floor will be humid, so invite fungus to grow fast.
 Food should not be stored in places affected by direct sunlight, because it will lead to changes in the temperature of food. Sunlight also affects the quality and fat content of vitamins in foods.
 Food should not be stored more than 3 months since the process of making. Quality vitamins and fat will be damaged in storage too long. Ideally, the food was bought, sent and given to the shrimp or through the purchase of each month.
 or rotten food that is too long, can not be used again. Losses resulting from the decay of food is greater than the disposal of food. Giving a label on the content of the feed Zech nutrisinya embankment will facilitate farmers to compare the nutritional value of food with others. Providing nutrition labels on the feed, usually with the minimum criteria for the content of protein, fat minimum, maximum fibers, the maximum ash, calcium and phospor. Food Shrimp is the food that is easily damaged so it is important to include the date of making food.

3. Giving the Food
As has been previously described, the feed must be in accordance with the biomass of shrimp in the ponds. Nevertheless, the situation shrimp health, age and environmental conditions ponds also have a direct influence on the consumption of feed. One method that has been usually used by shrimp farmers to see the amount of food consumed by the use of the shrimp is the ancho. To be more clear about the method of appointment of more ancho this can be seen in Table 10.
With only observe the growth of shrimp, prawn farmers can adjust the feed properly. Instructions on setting the feed based on weight can be seen in Table 11.

Table 10. The number of Food and Ancho Time Control














To know the increase in the feed per day, can be calculated using the formula A and B below:

A formula:
ADG BW = 1 - BW 2
1
BW 1 = average weight of the current (grams)
BW 2 = average body weight at the time of the last (grams)
t = time distance between BW 1 and BW 2 (days)

B formula:
F1 = BM ADG x x FR
100
Fl = Increase feeding on that day (day)
ADG = average increase in body weight / day (grams / day)
BM = average weight (grams) x number of living
FR = Feedback rate / comparison feeding on body weight at that time (%).

4. The Water and Aeration
Aeration and the water is a good one factor to improve the value of FCR. Conditions embankment less good environment, where running water is less good, the bad condition of ponds, oxygen dissolved the lower will be the factor that causes stress enough weight for shrimp. Shrimp haurs use of energy to overcome the stress so that the result of poor growth and FCR is also bad. In addition to the water and Aeration is good, to get the value of FCR, which also required the selection of locations and good land planning.

5. Predators and competitors
Preparation of ponds that are less good values can lead to a high FCR, because the land on the embankment yangjeiek there will be many predators (animals sweeping) and competitors (competitors animals). Farmers ponds should really prepare pond with the drying process, the installation of a filter in accordance with well before filling ponds, and if necessary remove predators and competitors before researching done.

summber:
Ir. Sri Umiyati Sumeru
Dra. Suzy Anna