Challenge 04: Develop a sustainable and equitable ocean economy
Permanent URI for this collectionhttps://repository.unesco.gov.ph/handle/123456789/23
Ocean Decade
Challenge 04:
Develop a sustainable and equitable ocean economy
Generate knowledge, support innovation and multi-sectoral partnerships and develop solutions for equitable, resilient and sustainable development of the ocean economy under changing environmental, social and climate conditions.
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- Growth, nitrate uptake kinetics, and biofiltration potential of eucheumatoids with different thallus morphologiesNarvarte, Bienson Ceasar V.; Genovia, Tom Gerald T.; Hinaloc, Lourie Ann R.; Roleda, Michael Y. (Wiley, 2021-12-30)The declining production of commercially important eucheumatoids related to serious problems like increasing susceptibility to ice‐ice disease and epiphytism may be ameliorated by nutrition. This ushered to an increasing interest in incorporating seaweeds into an integrated multi‐trophic aquaculture (IMTA) setup to take up excess inorganic nutrients produced by fish farms for their nourishment. In this regard, it is important to understand the nutrient uptake capacity of candidate seaweeds for incorporation in an IMTA system. Here, we examined the growth, nitrate (NO3‐) uptake kinetics and biofiltration potential of Eucheuma denticulatum and three strains of Kappaphycus alvarezii (G‐O2, TR‐C16 and SW‐13) with distinct thallus morphologies. The NO3‐ uptake rates of the samples were determined under a range of NO3‐ concentration (1‐ 48 µM) and uptake rates were fitted to the Michaelis‐Menten saturation equation. Among the examined eucheumatoids, only SW‐13 had a linear response to NO3‐ concentration while other strains had uptake rates that followed the Michaelis‐Menten saturation equation. Eucheuma denticulatum had the lowest Km (9.78 ± 1.48 µM) while G‐O2 had the highest Vmax (307 ± 79.3 µmol · g‐1 · min‐1). The efficiency in NO3‐ uptake (highest Vmax/Km and α) was translated into the highest growth rate (3.41± 0.58 % · d‐1) measured in E. denticulatum. Our study provided evidence that eucheumatoids could potentially take up large amount of NO3‐ and fix CO2 when cultivated proximate to a fish farm as one component of an IMTA system. During a 45‐d cultivation period of eucheumatoids, as much as 370 g NO3‐ can be sequestered by every 1 kg initial biomass E. denticulatum growing at 3% · d‐1. Furthermore, based on our unpublished photosynthetic measurements, the congeneric K. striatus can fix 27.5 g C · kg‐1 DW during a 12‐h daylight period.
- Ocean mapping and other marine activities of the National Mapping and Resource Information Authority (NAMRIA)Carandang, Efren P. (Philippine Council for Aquatic and Marine Research and Development, 2002)This paper describes the various marine activities being undertaken by the National Mapping and Resource Information Authority (NAMRIA) pursuant to its mandate as the central surveying, mapping and resource information agency of the government. NAMRIA gathers marine data through periodic hydrographic and oceanographic surveys and remote sensing techniques, and publishes the results in the form of nautical charts, bathymetric maps and other thematic maps. It also creates marine geographic information systems and databases. As steward of the National Oceanographic Data Center (NODC), the agency participates in international oceanographic data exchange programs, and also serves the marine data and information needs of the local marine science community. NAMRIA's data collection capability got a big boost with the acquisition this year of two multi-disciplinary survey vessels with state-of-the-art systems. With these vessels as platforms, NAMRIA will embark on the comprehensive charting of the Exclusive Economic Zone, and collaborate with the different marine science agencies in the conduct of multi-disciplinary oceanographic cruises.
- Defending Philippine maritime territory and marine resources: Initiatives and problemsCarranza, Ruben R., Jr. (Philippine Council for Aquatic and Marine Research and Development, 2002)The significance of the Philippines' maritime territory and the complexities of its defense are examined. The speaker highlights the integral role of the country's waters in trade, food security, and resource provision. Challenges, including naval limitations and maritime intrusions, are presented, followed by a discussion of defense strategies like selective sea control. The speech concludes with a call for decisive policy actions, diplomatic solutions to territorial conflicts, and improved capabilities to safeguard the nation's maritime interests.