RETHINKING FISHERY CARBON SINKS AND CARBON SINK FISHERIES

A comprehensive understanding of the scientific concepts and definitions related to fishery carbon sinks (FCS) and carbon sink fisheries (CSF) is essential for advancing relevant theories and exploiting the potential associated with CSF.This paper draws the following conclusions: (1) The current definition of FCS does not accurately reflect the concept of net reduction of atmospheric greenhouse gases (GHGs), while the carbon footprint assessment of CSF fails to fully encompass its entire life-cycle stages.(2) Both algae and filter-feeding fish release carbon dioxide (CO2) stored in their bodies after they are harvested and consumed, suggesting that their cultivation has limited potential as a carbon sink.(3) If the stock enhancement of fish can increase net biomass, it may contribute to certain benefits for CSF.(4) Beyond the energy consumption during breeding process, the carbon sink potential of shellfish farming largely depends on how their shells are disposed of and utilized.(5) The most effective approach for enhancing the carbon sink capacity of marine ecosystems is currently to implement fishing bans rather than allowing fishing.( 6) Marine fisheries may be more appropriately classified as low-carbon fisheries rather than CSF.( 7) The carbon sink potential of Chinese fisheries to be significantly overestimated, which could hinder the innovation and development of carbon sink fisheries.