The final examination marks the end of a doctoral student’s journey at Diponegoro University. The path to a doctoral degree is not easy, encompassing various stages, including colloquiums, seminars, qualifications, and the rigorous process of writing scientific articles. On December 22, 2025, the Aquatic Resources Management Doctoral Study Program produced its 203rd doctorate, Wita Setioko, a student in the 2022 MSDP Research Program.
The final closed examination took place via hybrid mode in Building J, Room 307, and via Zoom meeting from 10:00 AM to 12:30 PM WIB. The dissertation research presented was titled “Sustainability Analysis of Stocks and Export Trade of Swimming Crab Resources (Portunus spp.) in WPP 712 Indonesia to the United States.” The study found that the fishing season (west-east), which refers to the abundance of swimming crab stocks, correlates with the increase in the total volume of Indonesian swimming crab exports to the United States. The sustainability of crab resources in six WPP 712 locations during 2019-2022 demonstrates a need for adaptive, ecosystem-based management. SPR values ranged from 15% to 42%, with an average of 26% still within the reference limit (SPR 20%), indicating room for conservation strengthening. Relatively stable fishing productivity (4-5 kg/day) is in line with the CPUE range in Ministerial Decree No. 83 of 2022, although it varies between locations. This finding supports the urgency of implementing ecosystem-based management strategies, such as the 5-minute Catch and Return Movement (GTK5menit) initiated by APRI, which encourages the release of egg-bearing female crabs by fishermen as an effort to maintain productivity and regenerate crab stocks in the wild. Strategy 1 – Sustainable crab stock processing, Strategy 2 – Value-added product development, Strategy 3 – Market diversification, Strategy 4 – Improved infrastructure and partnerships, Strategy 5 – Utilization of technology for operational efficiency, Strategy 6 – Improved storage capacity and logistics management.
The Closed Examination was led by Prof. Agus Trianto, ST., M.Sc. Ph.D (Dean of FPIK), as the Chair of the Session and Internal Examiner, accompanied by Dr. Aninditia Sabdaningsih, S.Si., M.Si. (Study Program Manager and Co-Promoter), as the Secretary of the Examination Session with the Examination Team members consisting of; Prof. Dr. Ir. Yushinta Fujaya, M.Si (External Examiner); Dr. Ir. Bambang Argo Wibowo, M.Si (Internal Examiner); Prof. Dr. Ir. Suradi, M.S (Promoto); Prof. Dr. Dian Wijayanto, S.Pi., M.SE., M.M (Co-Promoter I). Based on the assessment results from the Closed Examination Examination Team on behalf of Wita Setioko, it was declared PASSED with several notes and became the 203rd graduate of the FPIK Diponegoro University Water Resources Management Doctoral Program.
Congratulations and success on your new title, Dr. Wita! Continue working in the advancement of science and making real contributions to the welfare of society, upholding the good name of the Faculty of Fisheries and Marine Sciences and your beloved alma mater, Diponegoro University.