In Mutsu Bay, Aomori Prefecture, where
scallop drooping culture fisheries have rapidly increased in production since
the 1970s, it has become clear that “oligotrophication”, a decrease in nutrient
concentrations, has occurred in recent years (Kudo et al., 2014). The purpose
of this research is to elucidate the mechanisms of “oligotrophication” in the
sea area that could threaten the maintenance of sustainable biological
production activities, and based on these findings, to examine countermeasures
against oligotrophication and recommend effective measures.
