Advances in shrimp aquaculture management by Sascha W. Felix

By Sascha W. Felix

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Feed Formulation, Processing and Quality Control Manufacturing a feed for shrimp involves several steps and all these steps have a defined effect on the quality and performance of the final product, that is feed. We can classify these factors as follows: (i) selection of raw materials,(ii) formulation and (iii) processing. When the production process is done according to the basic rules, it will not significantly affect the quality of the diet. On the other hand, selection of raw materials and formulation do have a decision influence on the performance of the diet.

Shrimp with this condition normally will be dieing. When the affected shrimps were placed in a well-aerated tanks, the white areas however disappeared within 24 hours and the shrimp became active. The same condition was also observed in P. monodon culture ponds. Aquaculturists feel that when dissolved oxygen level reaches 3 ppm or below in shrimp ponds, remedial measures are essential. 2 ppm. However, this may not be always hold true in a pond where several other factors interact. Mortality can be reduced in shrimps suffering from a lack of dissolved oxygen if the oxygen level is raised quickly.

It is better to dry it just until a man can walk on it without sinking in. It usually takes 7 to 10 days of drying to reach this point. Growth of “lab-lab” is also directly related to the amount of organic matter present in the soil. The following relationship of organic matter to the growth of algae could be seen normally. Table 2: Organic Matter Vs. Algal Growth Organic Matter (per cent) Growth of Algae Above 16 Very abundant 9–15 Abundant 6–8 Few 6 Very few To increase the amount of organic matter in the soil, fertilizer, chicken manure or other manures are applied to the dry pond bottom at the rate of 350 kg/ha.

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