Stock impact of exogenous hatchery-produced abalone in Japan

摘要

The Pacific abalone Haliotis discus species, including a cold-water distributed type called Ezo-abalone (H. discus hannai) and a warm-current inhabited type called Kuro-abalone (H. discus discus), is widely distributed in coastal areas of East Asia. Ezo- and Kuro-abalone are the most important abalone species for commercial fisheries resources owing to its high market value. Recent annual landing of these species have been reduced to about the 30% volume compared to the maximum catch level.