Analysis of causes of changes in conditions of vannamei shrimp hepatopancreas indicators at PT. Lombang Sumber Rejeki Sumenep

Abstract

Abstract Vannamei shrimp that are cultivated intensively require various steps to support the success of cultivation, one of which is observing the health condition of the shrimp. Shrimp health monitoring is carried out once every 10 days along with sampling activities. One of the parameters in shrimp health monitoring is a microscopic examination of the hepatopancreas using the wet preparation method. The indicators for determining the condition of the hepatopancreas organ that was observed microscopically were wrinkle, lipid, gregarine, necrosis, and microvilli whose results were expressed in percentage form. The purpose of this study was to determine the cause of changes in the condition of the hepatopancreas indicator which has an important role in the health of vannamei shrimp. This research was conducted in intensive ponds of PT. Lombang Sumber Rejeki which is located in Lombang Village, Batang - Batang District, Sumenep Regency. Data processing is done using Regression analysis. The peak increase in increase in the percentage of wrinkles occurred at the 4th sampling or the 40th DOC. Wrinkles increased in intensive ponds were significantly affected by lipid, microvilli, and gregarine conditions. Lipid indicators in hepatopancreas were significantly influenced by the type and amount of feed-in shrimp. Vibrio population combined with the average daily feeding can significantly affect the gregarine population. The microvilli are affected by the incidence of necrosis in the hepatopancreas tubules, the cause of the necrosis is thought to be due to factors other than the Vibrio population in the hepatopancreas.