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All Journal The Indonesian Accounting Review Applied Research in Science and Technology
Sopacua, Ivana Oktarina
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Environmental Science

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The Effectiveness of Adding Immunostimulants, Probiotics, and Liming Methods on Water Quality and Productivity of Shrimp Litopenaeus vannamei in Dewi Laut Aquaculture Company, Garut, Indonesia Permatasari, Sheny; Firdausi, Amalia Putri; Pradian, Yassar Ariq; Sopacua, Ivana Oktarina
Applied Research in Science and Technology Vol. 5 No. 1 (2025): Applied Research in Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/areste.v5i1.89

Abstract

Background: The whitelegs shrimp Litopenaeus vannamei is one of Indonesia's leading commodities. However, Intensive culture of Litopenaeus vannamei faces challenges such as environmental stress and decreased productivity due to fluctuating water quality.Aims & Methods: This study aimed to evaluate the effectiveness of adding immunostimulants (vitamin-mineral mix and garlic extract at 2 ppm), probiotics (2 ppm every two weeks), and lime treatment (CaO at 10 ppm) on water quality and the productivity of L. vannamei in ponds at PT. Dewi Laut Aquaculture, Garut. The observed productivity parameters included Average Body Weight (ABW), population, biomass, Feed Conversion Ratio (FCR), Survival Rate (SR), and size. Meanwhile, the measured water quality parameters included physical parameter such as temperature, chemical parameters such as pH, dissolved oxygen (DO), total ammonia nitrogen (TAN), total alkalinity, and total organic matter (TOM), as well as biological parameters such as total phytoplankton, total bacteria count (TBC), and total vibrio count (TVC).Result: The results showed that the applied treatments produced good culture performance, with ABW reaching 13.37 grams, SR at 91.01%, FCR at 1.7 and productivity of 20.39 tons/ha. Meanwhile, water quality monitoring indicated that some parameters exceeded the ideal ranges for shrimp culture, such as pH (maximum 9.12), TOM (up to 134 ppm), and TAN (up to 2.6 ppm). However, there is synergy between probiotics and immunostimulants, these conditions were still tolerable for the shrimp.
Antecedents of CSR Disclosure in Manufacturing Companies in Indonesia Sopacua, Ivana Oktarina
The Indonesian Accounting Review Vol. 7 No. 1 (2017): January - June 2017
Publisher : Universitas Hayam Wuruk Perbanas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14414/tiar.v7i1.1168

Abstract

The objectives of this study are; firstly, to examine the effect of profitability on Corporate Social Responsibility (CSR) disclosure; secondly, to examine the effect of leverage on CSR disclosure; thirdly, to examine the effect of company size on CSR disclosure; fourth, to find out whether the effect of leverage on CSR disclosure will be more significant with the inclusion of the variable of majority ownership as moderating variable; fifth, to find out whether the effect of profitability on CSR disclosure will be more significant with the inclusion of the variable of majority ownership as moderating variable. The sample was taken using a purposive sampling technique with 50 manufacturing companies during the period 2011- 2012 which fulfilled the required criteria as the research sample. They were analyzed moderation regression analysis approach. It shows that, first, profitability has positive effect on CSR disclosure; second, leverage has no effect on CSR disclosure; third, company size has an effect on CSR disclosure; fourth, majority ownership moderates the effect of leverage on CSR disclosure; fifth, majority ownership does not moderate the effect of profitability on CSR disclosure. Some limitations stated in this study are expected to be used as references for the improvement of similar studies in the near future. 
Co-Authors Firdausi, Amalia Putri Permatasari, Sheny Pradian, Yassar Ariq