Xác định cường lực và sản lượng khai thác bền vững tối đa tại vùng biển ven bờ và vùng lộng tỉnh Hưng Yên

Abstract

This study estimated the maximum sustainable yield (MSY) and maximum sustainable fishing effort (f_MSY) for the marine fishing fleet operating in the coastal and inshore waters of Hung Yen Province, based on data from 2020 to 2026. The results showed that the fishing fleet slightly decreased from 642 vessels in 2020 to 604 vessels in 2026. Gillnets remained the dominant fishing gear but showed a decreasing trend, whereas other fishing gears and vessels in the 12–<15 m length group increased.

The Schaefer surplus production model was applied to estimate MSY and the corresponding f_MSY. The estimated MSY for the coastal and nearshore waters of Hung Yen Province was approximately 43,969 tons, corresponding to an f_MSY of 591 vessels. Compared with the MSY threshold, the actual catch in 2025 reached 44,261 tons, exceeding MSY by about 292 tons, equivalent to 0.7%; meanwhile, fishing effort was 13 vessels, or 2.2%, higher than f_MSY. These results indicate that fishing activities have approached the sustainable threshold and reflect notable fishing pressure on marine resources in coastal and nearshore waters, particularly in the context of an uneven distribution of fishing effort among gear groups.

Keywords: Maximum sustainable fishing effort (MSY); maximum sustainable yield (f_MSY); Schaefer model; coastal and nearshore waters.