DETERMINATION OF THE BEST HARVEST TIME FOR WHITELEG SHRIMP (LITOPENAEUS VANNAMEI) CULTIVATION USING BIOECOMONICAL APPROACH IN PT NAYOTTAMA KELOLA LAUT INDONESIA, TASIKMALAYA REGENCY, WEST JAVA

• Main Author: Rahmah Hiracahya, Adinda
• Format: Final Project
• Language: Indonesia
• Subjects: Ilmu hayati ; Biologi
• Online Access: https://digilib.itb.ac.id/gdl/view/68998
• Institution: Institut Teknologi Bandung

Whiteleg Shrimp (Litopenaeus vannamei) is a species of Penaeid shrimp with a large market demand in Indonesia. West Java is the province with the second largest vaname shrimp production level in Indonesia, after West Nusa Tenggara. PT Nayottama Manajemen Laut Indonesia (PT NKLI) is one of whiteleg shrimp farming companies which has a pond location in Tasikmalaya Regency, West Java. PT NKLI conducts intensive whiteleg shrimp cultivation. With bioeconomical multidisciplinary approach, the analysis was carried out using aquaculture bioeconomic model based on a polynomial growth model. From the model that was formed, the best cultivation time to get optimal profit in the whiteleg shrimp farming business is able to be determined, both biologically and economically. To maximize the productivity, the factors that affect the production of white shrimp also need to be determined by analyzing the relationship between production yields and the supporting factors statistically. The data obtained are the results of weekly sampling of individual shrimp weight during the 2nd cycle of cultivation, input and output datas from the 1st – 6th cultivation cycle, as well as reports of overall income and costs incurred for the six cycles. The results of water quality monitoring for the 2nd cycle are used as additional data. With the bioeconomic model, the best estimated harvest time that will produce the greatest profit is on the 89th day with a harvest frequency of three times a year. The production function model obtained by testing the input factors to the production output is analyzed with the Cobb-Douglas production function. The obtained function is Y = 3.811X10.04X21.097X30.26, showing the relationship between vaname shrimp production (Y), fry stocking density (X1), accumulated feeding (X2), and maintenance costs (X3). The feeding variable had a significant effect on the 95% confidence level (? = 0.05). From the coefficient of production factors, the return to scale value is 1.397, which means that vannamei shrimp culture at PT NKLI is at increasing return to scale. Water quality parameters in vaname shrimp culture at PT NKLI are in accordance with quality standards, with 111.69 ± 5.61 cm water height, 20.52 ± 2.42 ppt salinity, 5.66 ± 0 .42 ppm dissolved oxygen (DO), 29.14 ± 1.044ºC water temperature, and 8.06 ± 0.13 pH level. It concludes that the addition of stocking density and total feeding as well as reducing the quantity of maintenance can be done gradually to optimize profits while taking into account the impact on water quality and additional cost.