A promotional initiative was carried out targeting farmed tiger puffer producers to expand the supply of cherry salmon juveniles. The initiative promotes the introduction of “two-crop aquaculture,” in which cherry salmon are farmed during the off-season for tiger puffer, with the aim of improving cage utilization and stabilizing aquaculture management.
While shipments of tiger puffer peak toward the year-end, which is the period of highest demand, the months from June to August of the following year — until the next stocking of juveniles — represent an off-season. During this period, fish cages have not been fully utilized, posing challenges for profitability. To address this issue, a proposal has been put forward to farm cherry salmon as a second crop during the off-season, thereby establishing a year-round production and shipment system.
By combining tiger puffer and cherry salmon in a two-crop farming model, full utilization of cages becomes possible, improving the efficiency of capital investment recovery and helping to stabilize revenues. Producers have expressed expectations such as “expanding the possibilities of aquaculture management” and “contributing to risk diversification.”
Cherry salmon are considered capable of stable aquaculture production at water temperatures of around 20°C and are well suited to cope with rising seawater temperatures associated with climate change, which has become a growing concern in recent years. By utilizing juveniles with improved tolerance to higher temperatures, it is possible to build a production system that is less affected by environmental changes, contributing to the expansion of domestic salmon production.
Two-crop aquaculture, which makes effective use of the off-season, is attracting attention as an initiative that supports stable aquaculture management and improved profitability going forward.
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