5 papers
Mathematical model for sustainable fisheries resource management accounting for size spectrum
Hidekazu Yoshioka, Yumi Yoshioka, Motoh Tsujimura +1
This paper proposes a novel modelling and control framework for growth models that incorporate a size spectrum in conjunction with numerical computation and extensive field surveys…
Non-Markovian superposition process model for stochastically describing concentration-discharge relationship
Hidekazu Yoshioka, Yumi Yoshioka
Concentration-discharge relationship is crucial in river hydrology, as it reflects water quality dynamics across both low- and high-flow regimes. However, its mathematical descript…
Tractable fish growth models considering individual differences with an application to the fish Plecoglossus altivelis altivelis
H. Yoshioka, Y. Yoshioka, M. Tsujimura
Modeling fish growth is an important research topic in ecological and fishery sciences because body weight statistics directly affect the total biomass of fish in a habitat, which…
Stochastic volatility model with long memory for water quantity-quality dynamics
Hidekazu Yoshioka, Yumi Yoshioka
Water quantity and quality are vital indices for assessing fluvial environments. These indices are highly variable over time and include sub-exponential memory, where the influence…
Fishery resources management
Hidekazu Yoshioka, Motoh Tsujimura, Yumi Yoshioka
We consider management of the fish species Plecoglossus altivelis altivelis, a major inland fishery resource in Japan playing important roles from economic, cultural, and recreatio…