EFFECTIVENESS OF REARING EQUIPMENT ON THE SURVIVAL AND GROWTH OF PEARL OYSTER (Pinctada maxima) SEED AT KODEK BAY, NORTH LOMBOK

<p><strong><em>ABSTRACT</em></strong></p> <p><em>Oyster seeds mass mortality is one of the problemes in pearl farming business. Extreme temperature changes may cause mortality in oyster seed within sehll size of 3-4 cm. Modification in rearing equipment is therefore needed to maintain oyster survival from the impact of seasonal temperature fluctuation.</em> <em>The aim of this research was to observe the effectiveness and effect of rearing equipment on the survival and growth of pearl oyster (<span style="text-decoration: underline;">Pinctada</span> <span style="text-decoration: underline;">maxima</span></em><em>) seed at Kodek Bay, North Lombok. This research conducted from March- November 2009 was the continuation from the previous observation (December 2008-February 2009). Percentage of pearl oyster seed survival reared in “tento” basket was 84%, while that in pocket was 53%. “Chi-square” test showed that pearl oyster survival rate was siginifcantly affected by using the two equipment influence within 95% confidence level with ratio of 1.00:1.06. The growth of shell width, thickness, and weight of oyster seed tended to be higher reared in a“tento” basket (having broader space for movement) than that reared in a pocket. Length-weight relationship for those treatments showed similar pattern with minor allometry (b&lt;3). </em></p> <p><em> </em></p> <strong><em>Keywords</em></strong><em>: “Tento”basket, pocket, survival, growth, pearl oyster seed, <span style="text-decoration: underline;">Pinctada</span> <span style="text-decoration: underline;">maxima</span>