http://scholars.ntou.edu.tw/handle/123456789/201 2026-04-23T16:38:46Z 2026-04-23T16:38:46Z Liao, Chun-Pei Chu, Yu-Ting Hu, Yeh-Fang Lee, Meng-Chou Nan, Fan-Hua Lu, Yu-Heng http://scholars.ntou.edu.tw/handle/123456789/26546 2026-03-16T07:34:57Z 2025-01-01T00:00:00Z

標題: From feeding to flourishing: Aquaponics strategies and their impact on Taiwan 作者: Liao, Chun-Pei; Chu, Yu-Ting; Hu, Yeh-Fang; Lee, Meng-Chou; Nan, Fan-Hua; Lu, Yu-Heng 摘要: Over the past twenty years, global research on aquaponics has shown steady growth, particularly in areas such as system performance optimization, wastewater treatment, nutrient balance, and the efficiency of plant and animal production. In Taiwan, about 80 commercial-scale aquaponics producers are operating, with the top 20% occupying most of the production area. Recent trends over the past decade reveal four key inferences: (1) A decline in annual aquaponics research output in Taiwan; (2) An increase and diversification of aquaponics farms, with rapid growth among system vendors, though stable, large-scale commercial operations are still lacking; (3) Ongoing challenges like poor summer crop growth and increased winter market competition; and (4) Broad agreement on the social value of aquaponics, despite lagging administrative support. The aquaponics industry in Taiwan, despite varying system designs, emphasizes sustainable practices and their benefits to environmental and social well-being. Strong community support persists, yet challenges like extreme temperatures, winter competition, administrative hurdles, and difficulties in leasing land and obtaining licenses remain. As aquaponics contributes to both food production and community nourishment, diversified models are essential for food security. To ensure sustainable growth, enhanced administrative support and better understanding of consumer preferences and industry dynamics are crucial.

2025-01-01T00:00:00Z Wu, Yan-Lun Liang, Ting-Yu Hsu, Wei-Pin Shimada, Teruhisa Wirasatriya, Anindya Wetchayont, Parichat Qiu, Chunhua Lan, Kuo-Wei http://scholars.ntou.edu.tw/handle/123456789/26538 2026-03-12T03:49:06Z 2026-01-01T00:00:00Z

標題: Projected impacts of climate change on the spatial distribution and habitat preference of tropical tuna in the Pacific Ocean 作者: Wu, Yan-Lun; Liang, Ting-Yu; Hsu, Wei-Pin; Shimada, Teruhisa; Wirasatriya, Anindya; Wetchayont, Parichat; Qiu, Chunhua; Lan, Kuo-Wei 摘要: Climate change is altering ocean conditions such as sea surface temperature, salinity, stratification, and dissolved oxygen, reshaping habitat suitability for yellowfin tuna (Thunnus albacares, YFT) and bigeye tuna (Thunnus obesus, BET). This study integrated Taiwanese longline catch-per-unit-effort (CPUE) data from 1981 to 2014 with environmental covariates using a Vector Autoregressive Spatio-Temporal (VAST) framework to develop Habitat Suitability Index (HSI) models. Fishing effort increased from similar to 200,000 hooks in 1991 to nearly 820,000 in 2002, before declining to similar to 400,000 by 2021. YFT dominated catches until 2000, after which BET became predominant. Spatial analyses indicated BET hotspots in the tropical central and eastern Pacific, whereas YFT were more abundant in the western Pacific with smaller hotspots in the east. Suitability curves showed BET favored cooler, moderately saline, oxygen-rich waters, while YFT preferred warmer, saltier, and slightly less oxygenated conditions. Coupling HSI models with CMIP6 projections under SSP1-2.6 and SSP5-8.5 revealed contrasting redistribution patterns: BET habitats are projected to contract and shift eastward by the end of the century, while YFT habitats are expected to expand across wider Pacific regions. These findings demonstrate that climate-driven changes in tuna distribution will likely reshape fishery productivity and management requirements. Regionspecific quota adjustments, flexible management zones, and strengthened multinational cooperation will be necessary. Incorporating the HSI outputs into quota setting and spatial planning can help sustain Taiwan's distant-water tuna fisheries in a changing climate.

2026-01-01T00:00:00Z Xu, Wen-Qi Wang, Sheng-Ping Lin, Chih-Yu Chiang, Wei-Chuan Kitakado, Toshihide http://scholars.ntou.edu.tw/handle/123456789/26534 2026-03-12T03:49:04Z 2026-01-01T00:00:00Z

標題: Spatio-temporal dynamics for dolphinfish (Coryphaena hippurus) in the waters around Taiwan: Implications for stock assessment and fisheries management 作者: Xu, Wen-Qi; Wang, Sheng-Ping; Lin, Chih-Yu; Chiang, Wei-Chuan; Kitakado, Toshihide 摘要: Understanding the spatio-temporal dynamics of dolphinfish (Coryphaena hippurus) is essential for effective stock assessment and fisheries management. Owing to its migratory nature, rapid growth, and short lifespan, the species requires management approaches that account for spatial and temporal variability. In this study, two spatio-temporal modelling frameworks, VAST and sdmTMB, were applied to longline fishery logbook data collected in the waters around Taiwan from 2011 to 2023. Standardised indices of relative abundance were estimated using an area-weighted approach that accounted for both fished and unfished regions. Cluster analysis was conducted to classify fishing strategies based on species composition, revealing a dominant dolphinfishtargeted cluster concentrated in the eastern offshore region. Both spatio-temporal models detected consistent seasonal patterns, with peak abundance in the second quarter and a decline in the third, aligning with known migratory behaviour and oceanographic influences. Spatial hotspots were identified primarily in the northeastern waters influenced by the Kuroshio Current. While general agreement was observed between the models, sdmTMB produced higher spatial contrast and slightly greater abundance estimates in the early years. Differences in model structure, spatial resolution, and data coverage were found to influence predictive outcomes. Limitations regarding logbook data quality, spatial bias, and the absence of environmental covariates were acknowledged. Nevertheless, the results demonstrate the utility of spatio-temporal modelling in deriving robust abundance indices and identifying biologically and operationally significant fishing grounds that represent key habitats and high-effort zones for dolphinfish fisheries in the northwestern Pacific. These findings provide a strong basis for integrating spatial dynamics into stock assessments and support the development of adaptive, spatially explicit management strategies in the western Pacific.

2026-01-01T00:00:00Z Ravi, Sreekrishanan Matovu, Baker Chandran, S. Smitha Mwabvu, Bridget Mammel, Mubarak Lee, Ming-An Vikraman Nair, Navya http://scholars.ntou.edu.tw/handle/123456789/26532 2026-03-12T03:49:04Z 2026-01-01T00:00:00Z

標題: With threatened blue carbon ecosystems, how can remote sensing complement coastal communities' perspectives to advance sustainable resource governance and management solutions in India? 作者: Ravi, Sreekrishanan; Matovu, Baker; Chandran, S. Smitha; Mwabvu, Bridget; Mammel, Mubarak; Lee, Ming-An; Vikraman Nair, Navya 摘要: This study integrated remote-sensing data (RSD) from the Arabian Sea area and coastal community perspectives in Kerala to demonstrate the complementarity of transdisciplinary research in generating knowledge on blue carbon ecosystems (BCEs) and advancing sustainable coastal resource governance solutions. Community perspectives demonstrated that although Kerala is endowed with BCEs, notably mangroves, since the 1980s, they have been declining due to human-environmental drivers. Although local communities predominantly attribute the losses to human activities, e.g. dredging and aquaculture, RSD analysis revealed sustained environmental vulnerability drivers. Elevated sea surface temperature (SST), sea surface salinity (SSS), and sea surface chlorophyll (SSC) levels have been observed since 2010, ranging from 1 degrees C, 0.2 PSU, and 0.1 mg/m3, respectively. Correlating with community perspectives, elevated SSS have affected mangrove abundance and species, including in post-summer and monsoon periods. Hotter summer temperatures above 30 degrees C progressively occurring in April, May, and June, and extending to October and December, increase livelihood and mangrove losses, yet collaborative governance options are limited. Overall, the satellite-derived SST, SSS, and SSC findings correlated with coastal community perspectives, in reinforcing physically consistent interannual variability, confirming their reliability and suitability for subsequent oceanographic research and ecological modelling applications. Through transdisciplinary (TD) research approaches, local observations on threatened BCEs and livelihood change could be integrated and strengthened with marine satellite and scientific data to advance sustainable resource governance options. In this study, six policy and research recommendations that could advance marine TD research are given.

2026-01-01T00:00:00Z