http://hdl.handle.net/10862/3532 Mon, 06 Apr 2026 12:50:12 GMT 2026-04-06T12:50:12Z http://hdl.handle.net/20.500.12066/7577 Development of aquaculture techniques on new aquatic species to create and promote a local aquaculture industry in Southeast Asia Legaspi, Ma. Irene; Buen-Ursua, Shelah Mae; Ito, Sayaka; de la Peña, Leobert D.; Tupas-Bautista, Richelle Aquaculture achieved a significant milestone in 2022, surpassing capture fisheries production as the leading aquatic producer. Its global production reached 130.9 million t, with 94.4 million t comprising aquatic animals, marking a 4.4 % surge from 2020 (FAO, 2024). This milestone, coupled with the decline of capture fishery production due to overexploitation and overfishing, underscores the need to explore and develop aquaculture techniques for new aquatic species. Once established, these techniques will be promoted and hopefully create a new local aquaculture industry in Southeast Asia. Recognizing the unparalleled success and expertise of the Aquaculture Department of the Southeast Asian Fisheries Development Center (SEAFDEC/AQD) in the development of aquaculture technologies, especially in the broodstock management, spawning, larval rearing, nursery and grow-out culture, fish nutrition, and fish health management, this study, with funding support from the Japanese Trust Fund (JTF), aims to develop aquaculture techniques for new aquatic species, namely: slipper lobster (Thenus orientalis), kawakawa (Euthynnus affinis), and shortfin scad (Decapterus macrosoma). Furthermore, this study was conducted to generate basic information on reproductive biology, breeding, farming techniques, feeding habits, fish health, and other relevant data for developing aquaculture techniques of the three species through the collection from identified sites, transport, stocking, and management of broodstock, larval rearing, feeding, and health management experiments. Sun, 01 Dec 2024 00:00:00 GMT http://hdl.handle.net/20.500.12066/7577 2024-12-01T00:00:00Z http://hdl.handle.net/20.500.12066/7576 Establishment of a responsible shrimp farming system using an ecosystem approach Tendencia, Eleonor; Ito, Sayaka; Peńa, Leobert de la; Tupas-Bautista, Richelle Green algae (Caulerpa), red algae (Gracilaria), and sandfish were nominated as purifying organisms suitable for shrimp farms in this study. Circulating microcosm experiments were conducted to examine the effects of those purifying organism candidates on rearing water quality and disease-causative bacteria and their impact on shrimp production. However, the three nominated purifying organisms could not enhance shrimp survival. Due to mass weight reduction during the experimental period, these purifying organisms were unlikely to be used as aquaculture by-products. On the other hand, the experiment showed that Caulerpa, Gracilaria, and sandfish, while not having the potential to reduce or remove disease-causing bacteria, can still effectively remove NH₄ and total assimilated nutrients (TAN). The removal level did not differ among the three septic organisms, indicating that they can improve water quality equally. The septic organisms are expected to contribute in maintaining a healthy aquaculture environment by mitigating harmful substances for shrimp, such as NH₄ and TAN, in aquaculture effluents. It is essential to note that if these purifying organisms are utilized in an aquaculture system, proper adjustments to their culture environment, such as salinity, should be made to ensure higher rates of survival and efficiency. This valuable information may help small-scale shrimp farmers establish aquaculture management plans to improve productivity through the proper maintenance of the aquaculture environment by using septic organisms. Sun, 01 Dec 2024 00:00:00 GMT http://hdl.handle.net/20.500.12066/7576 2024-12-01T00:00:00Z http://hdl.handle.net/10862/6562 Achieving sustainable aquaculture in Southeast Asia: A case study on community-based giant freshwater prawn production in Laguna Lake, Philippines Salayo, Nerissa D.; Aya, Frolan; Montinola, Quenie S.; Ito, Sayaka; de la Peńa, Leobert D.; Bautista, Richelle T. The Aquaculture Department of the Southeast Asian Fisheries Development Center (SEAFDEC/AQD) implemented the project “Sustainable Aquaculture through Cost-effective Culture Systems, and Prompt and Effective Aquatic Animal Health Management” from 2020 to 2024 with support from the Japanese Trust Fund (JTF). The Project consists of three main activities: 1) cost-effective culture system, 2) prompt and effective aquatic animal health management, and 3) capacity enhancement for sustainable aquaculture. It complies with Resolution No. 16 Strengthen aquaculture governance and implement good aquaculture practices to sustain production for food safety and security, sustainable livelihoods, and rural development of the ASEAN-SEAFDEC Resolution and Plan of Action on Sustainable Fisheries for Food Security for the ASEAN Region Towards 2030 (RES&POA-2030). Recognizing the success and expertise of AQD in the development of aquaculture technologies, especially in broodstock management, spawning, larval rearing, nursery and grow-out culture of aquatic fish, crustaceans, mollusks, sandfish, and seaweeds, feed development, fish health management, development of vaccine treatment, protective measures against existing and emerging diseases, community-based resource management, and implementation of aquaculture related training courses, the Project was conducted to improve the stability and sustainability of aquatic food production and for technology dissemination in the Southeast Asian region. Under Activity 1 of this Project, this study aims to establish a community-based seedlings supply system. This article highlights the inherent challenges of hatchery production, particularly our growing vulnerability to climate variability, including temperature fluctuations and water quality issues. Effective data monitoring can guide adaptive management strategies through science-based strategies, such as investing in appropriate technologies, adjusting densities, and changing feeding practices to boost production yields. Tue, 01 Oct 2024 00:00:00 GMT http://hdl.handle.net/10862/6562 2024-10-01T00:00:00Z http://hdl.handle.net/10862/6561 Promoting sustainable aquaculture of freshwater species: The continuous quest for alternative feeds and adoption of feeding strategies Aya, Frolan; Ito, Sayaka; de la Peńa, Leobert D.; Bautista, Richelle T. Among farm inputs, feeds are the highest recurring cost in aquaculture. Indeed, feeds have become even more expensive after the COVID-19 pandemic, undeniably affecting the aquaculture economics. The pressing need to alleviate feed costs has to be prioritized, considering its implications for sustained aquaculture production to support the ever-increasing global population. Substantially, the rising costs of manufactured feeds have driven the continuous quest for new alternative feed ingredients in aquafeeds and the adoption of feed management strategies to improve the profitability of aquaculture operations. These two strategies addressed in this study are imperative in promoting freshwater aquaculture among the ASEAN Member States. This article highlights the exploration of feeding trials using alternative protein sources and feeding strategies. Because of their economic relevance to the freshwater aquaculture industry in the Philippines, Nile tilapia, giant freshwater prawn, and tropical anguillid eel, particularly the Pacific shortfin eel, were chosen in this study. Tue, 01 Oct 2024 00:00:00 GMT http://hdl.handle.net/10862/6561 2024-10-01T00:00:00Z