Ayu Winna Ramadhani’s research while affiliated with University of Brawijaya and other places

Introduction: Infectious Myonecrosis Virus (IMNV) attack vannamei shrimp ( Litopenaeus vannamei ) in the muscles and hepatopancreas that threatens shrimp culture. Strategies to avoid mortality can be carried out through squid ( Loligo sp. ) ink powder to improve the body's defense system. The study aimed at investigating the effects of squid ( Loligo sp. ) ink powder to non-specific immune response of vannamei shrimp ( L. vannamei ) against IMNV. Results: Completely Randomized Design (CRD) was utilized consisting of 3 treatments and 2 controls i.e. a dose of 400, 500, and 600 mg squid ink powder / kg feed and infected with IMNV; also positive control (K +) i.e. shrimp infected with IMNV without giving squid ink powder, and negative control (K-) i.e. healthy shrimp without treatment and IMNV infection, each with 3 replications. The result of increasing non-specific immune activity was marked by increasing in the highest Total Hemocyte Count (THC), Differential Hemocyte Count (DHC), Respiratory Burst (RB), Super Oxyde Dismutase (SOD), Phenoloxidase (PO), reducing of Ribonucleotide Reductase (RR) and phagocytic activity with the highest results at the 3rd week (7 days after infection). Conclusion: In this study, we investigated that the squid ( Loligo sp.) ink powder has the potential and capability to enhance the immune system in shrimp. The result showed, 500 mg squid ink powder/kg feed was the best dose because increase the activity of non-specific immune responses against IMNV.

In intensive shrimp farming systems, apart from feed, the presence of plankton is an important factor in shrimp farming as a tropic level in waters where the main producers in the waters are phytoplankton. The nature of plankton in the waters is not only beneficial but also detrimental. The condition of a waters will also affect the pattern of distribution or distribution of plankton both horizontally and vertically, so that it will affect the abundance of plankton which in turn will affect the value of primary productivity. This study aims to determine the ratio of plankton abundance and water conditions to the growth performance of vaname shrimp (Litopenaeus vannamei) organisms. The method used in this research is descriptive using the sampling method. The analysis was carried out in the form of abundance of plankton species and water physico-chemical parameters (temperature, pH, salinity, DO, ammonia, nitrate and nitrite). The results obtained found 5 classes of plankton (chlorophyta, cyanophyta, diatoms, dinoflagellate, zooplankton) with varying abundances where the highest abundance was found in classes and cyanophyta. Water quality is still within normal limits for vannamei shrimp growth.