Oysters, owing to their high nutritive value and the various uses of their by-products, are the most important bivalves for cultivation. A number of local species suitable for culture are widely distributed throughout the country. Several coastal localities that are potential natural grounds for oysters are awaiting exploitation. They consist of bays, gulfs, lagoons, mouth of rivers, tidal streams, estuaries and inland seas. However, only limited areas in regions thickly populated around Manila Bay and Lingayen Gulf are utilized. There is a great demand for oysters free from pollution and contamination. The methods of culture in existing oyster farms are similar to those practiced abroad. While these methods have their own advantages depending on prevailing local conditions, an improved device adaptable for use in most places here is described in this paper.
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