Supplemental diets egg custard formulations

To date, artificial diets have not generally been found to be as successful for prawn larval rearing as with marine shrimp. These inert feeds are most commonly based on semi-moist egg-custard formulations that are easily produced at commercial hatcheries. Farm-made custard-style feeds in Thailand originate from the work of Chacheongsao Fisheries station, which received United Nations Development Programme (UNDP/FAO) assistance during the late 1970s and early 1980s (Boonyaratpalin &New 1993). These larval diets (Table 6.4) basically consist of egg custard, made from a mixture of whole eggs and full-fat milk powder. Milk powder (2 scoops or 9 g) is first stirred in 200 ml of hot water. Six chicken eggs are added and the whole portion is then homogenised in a blender and steamed for at least 20 minutes or until cooked. Sometimes a vitamin premix is added. An important factor in the satisfactory preparation of this feed is the warming-up of the container in which the ingredients are mixed, because this results in a softer

Table 6.4 Composition and nutritive value of egg-custard feeds for M. rosenbergii larvae in Indonesia and Thailand.

Quantity

Table 6.4 Composition and nutritive value of egg-custard feeds for M. rosenbergii larvae in Indonesia and Thailand.

Quantity

Ingredients

*

**

Fish meal

100g

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