Bioeconomic modeling of oyster farming in Miyagi Prefecture, Japan

Abstract

Rational management is required for the profitability of the Japanese aquaculture industry and to promote investment in the industry. Although bioeconomic modeling could facilitate rational aquaculture management, it has not been applied in Japanese marine aquaculture. In the present study, we developed a bioeconomic model for oyster farming in Miyagi prefecture, Japan, and determined the optimal harvest schedules under labor constraints. Low, moderate, and high temperature scenarios were simulated to investigate the effects of changes in seawater temperature on farm productivity. Early initiation of harvest, particularly from late October or early November, achieved the maximum profit under the environmental and economic conditions in the present study. The moderate temperature scenario (current temperature conditions) had a high total profit (962,890 JPY) when harvest was initiated on October 29. The high temperature scenario had lower profits than the profits under current conditions, indicating that climate change could have adverse effects on oyster farming profitability in Miyagi prefecture.

Productivity versus environmental sustainability: A broadscale assessment of freshwater aquaculture's technical efficiency and ecological efficiency in China's inland provinces

“…Evaluating the impact of these determinants can help us identify and understand the driving forces of technical and ecological improvement. Rising temperatures and extreme weather events may affect water temperatures and acidity levels, potentially disrupting aquaculture operations and impacting the health of aquatic organisms (Kamiyama et al, 2021; Salvo et al, 2017). Economic conditions may impact aquaculture production in terms of investment, access to markets, and profitability (Wang et al, 2023).…”