The Influence of Thalassiosira sp. in Feeding Regime on The Development and Survival Rate of Vaname Shrimp Larvae (Litopenaeus vannamei)

Vaname (Litopenaeus vannamei) is a species of marine shrimp that has been widely cultivated in several regions in Indonesia.The hatching process of vaname was highly dependent on the use of natural feed.Phytoplankton is a natural food that is often used in the vaname hatchery.The natural food given is expected to provide good growth, development, and survival for vaname shrimp larvae.Thalassiosira sp. is one of the natural foods that is often used as natural food for shrimp larvae, high nutritional content and suitable size for shrimp larvae make it easier for shrimp larvae to predate on this type of phytoplankton.The purpose of this study was to examine the effect of different amounts of Thalassiosira sp. cells in feeding regimes on the development and survival of vaname larvae.This research was conducted at Marine Science Techno Park (MSTP), UNDIP, Jepara, Central Java.The research method used was an experimental method using a completely randomized design with 5 treatments and 3 replicates.The treatments used were treatments A, B, C, D, and E with the total amount of Thalassiosira sp. as mus as 56x104, 63x104, 70x104, 77x104, and 84x104 cell/ml, respectively.The vaname larvae used starting from nauplii stadia, were reared in jars with a size of 4 liters, and filled with seawater as much as 2 liters.The stocking density of vaname shrimp larvae was 100 larvae/liter.Maintenance of vaname shrimp larvae is carried out for approximately 10 days or until the post-larva stage.The data showed that the differences amount of Thalassiosira sp. cells in the feeding regimes of vaname larvae resulted in significantly effects (P<0.05) on the total feed consumption and survival of vaname larvae.However, there was no effect (P>0.05) on the larval development.Based on these results, the best treatments were obtained in treatments C and D, on the total feed consumption value of 486.67±25.17x103and 480.0± 20.00x103 cells/ml, and the survival rate values of 76.30±2.25% and 78.00±3.50%,respectively.