Polyculture of white shrimp, Litopenaeus vannamei and milkfish, Chanos chanos as a strategy for efficient utilization of natural food production in ponds
Journal Title: Animal Biology & Animal Husbandry - International Journal of the Bioflux Society - Year 2011, Vol 3, Issue 2
Abstract
Both shrimps and milkfish are important aquaculture species in the Philippines. In the present study, we described a modified extensive polyculture method for white shrimp, Litopenaeus vannamei and miklkfish, Chanos chanos in ponds during the wet months. This particular culture system uses two or more species in a particular production area with the purpose of maximizing the utilization of the available natural food present in the system. Two 1-hectare earthen ponds were prepared and added with organic and/or inorganic fertilizers to enhance natural food production. The ponds were stocked with white shrimp postlarvae (PL) at a density of 1 PL m-2 and milkfish at 750 juveniles ha[sup]-1[/sup]. There was no water exchange during the first two months of culture followed by a bi-weekly water exchange until harvest. No artificial feeding was provided during the culture period, instead, the ponds were supplemented with inorganic fertilizers every month to ensure stable production of natural food. Both shrimps and milkfish appeared healthy and no disease outbreaks were observed during the production cycle. The physico-chemical parameters of the water in the ponds were within the optimum levels that are required for both shrimp and milkfish farming. The phytoplankton population was stable and predominantly composed of Chlorella sp., a green microalga (Chlorophyta). The cultured stock were harvested after 100 days of culture at sizes of 13-15 for white shrimp and > 250 g for milkfish. There was high survival rate of milkfish but low for white shrimps, and this could be affected by the prevailing climatic condtions during culture and the age and size of the species during stocking.
Authors and Affiliations
Cecilia Jaspe, Christopher Caipang, Bessie Elle
Keywords
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