Yi Jay Chang
Associate Professor
Yi-Jay Chang is the principal investigator of the Quantitative Fisheries Lab at IONTU. He is a fisheries scientist who is interested in fisheries ecology and stock assessment and management of fisheries resources of commercial and recreational importance. He has been involved and leaded in the assessment of various pelagic species (e.g., North Pacific striped marlin, swordfish, Pacific blue marlin, and Pacific saury)
Research interests
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Development and advancement of stock assessment methods for marine living resources
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Statistical approaches and risk-based fisheries management
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Climate change impacts on marine fish populations and assessments
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Multispecies and ecosystem-based modeling
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Artificial intelligence and machine learning applications in fisheries science
Yi-Chen Chen
M.Sc. Student
Pacific swordfish; stable isotope analysis; habitat use; cross-regional movements; spatio-temporal isotope modeling
Zi-Wei Yeh
Research Assistant
Statistical modeling of fisheries data; prediction of abundance and spatio-temporal dynamics
Cheng-Hao Yi
M.Sc. (Alumnus)
Multispecies spatial autocorrelation SDMs; climate change impacts
Wei-Che Hung
M.Sc. (Alumnus)
Reproductive biology and life history of Pacific saury
Xu-Bang Chang
M.Sc. (Alumnus)
Age and growth estimation of Pacific black marlin
Min-Sian Su
Research Assistant (Former)
Machine learning
Kuan-Chun Tseng (Tina)
M.Sc. Student
Vertical migration behavior of albacore tuna; spatio-temporal SDMs; climate variability effects
Jhen Hsu
Ph.D. (Alumnus)
Stock assessment methodologies; simulation-based evaluation; fisheries statistical analysis
Cheng-Yu Lu
M.Sc. (Alumnus)
Deep learning; AI-based otolith age determination for Pacific bluefin tuna
Po-Kai Lai
M.Sc. (Alumnus)
Climate change impacts; species distribution projections; South Pacific albacore
Ke Lee
Research Assistant (Former)
Fisheries data processing and analysis
Chih-Yi Cheng (Jenny)
M.Sc. Student
Pacific saury; climate-driven distribution shifts; spatio-temporal SDMs; CMIP6 multi-model ensemble projections;
Yun-Wei Chou
M.Sc. (Alumnus)
Empirical Dynamic Modeling (EDM); inference of spatial interactions; co-supervised with Prof. Chun-Wei Chang
Yu-Chi Su
M.Sc. (Alumnus)
Pacific saury; otolith-based natural tagging; migration dynamics; life-history traits; co-supervised with Prof. Jen-Chieh Shiao
Kun-Yu Lai
M.Sc. (Alumnus)
Improving abundance index estimation for South Pacific albacore
Shu-Yu Yeh
Research Assistant (Former)
Data visualization; improvement of tuna longline logbooks and observer database