Japan's shellfish farmers in crisisーNHK WORLD-JAPAN NEWS

Key Concepts

• Impact of Climate Change on Seafood: The transcript highlights the severe consequences of rising temperatures and other environmental factors on Japan's oyster and scallop farming.
• Economic Devastation for Farmers: Farmers are experiencing massive losses, with some reporting up to 90% of their harvests dead or severely damaged.
• Supply Chain Disruptions: The decline in production threatens the availability and affordability of seafood for consumers.
• Need for Research and Financial Assistance: Government officials and industry representatives are calling for investigations into the causes of the die-offs and for financial support for affected farmers.
• Long-Term Challenges: The problem is not a short-term issue, with potential long-term implications for the sustainability of Japan's shellfish industry.

Impact on Japan's Seafood Industry

The Japanese seafood industry is facing significant challenges beyond China's import halt. A scorching summer has devastated oyster and scallop farmers, with a substantial portion of their produce reportedly dead.

Oyster Farming Crisis

• Delayed Harvests and Slowed Growth: Record-breaking temperatures have delayed oyster harvests by slowing their growth rates.
• Mass Die-offs and Reduced Yields: Farmers report huge numbers of oysters dying, severely impacting their yields.
• Specific Farmer Testimony: Nabara in Kur City reported losing up to 90% of his harvest. He typically harvests about 200 kg of shucked oysters per day but managed only 30 kg on a recent inspection. He described the oysters as "empty" and poor in color, expressing pessimism about recovery.
• Government Intervention: Fisheries Minister Suzuki Norikazu inspected the damage in Hiroshima Prefecture and met with local officials and a fishing cooperative.
• Official Request for Investigation: The fishing cooperative formally requested the government to investigate the causes of the oyster deaths. Minister Suzuki acknowledged the severity and pledged to conduct thorough research and launch an investigation.
• Financial Assistance Promised: Suzuki also stated his intention to work with local authorities on providing financial assistance to affected farmers.

Scallop Farming Devastation

• Mutsu Bay Crisis: Mutsu Bay in Aomori Prefecture, renowned for its scallops, is experiencing a severe decline.
• High Mortality Rate: A recent survey indicates that over 90% of scallops born this year have already died.
• Growth Stagnation: The scallops are not only dying but also failing to grow, described as an "unprecedented" situation.
• Threat to Local Delicacy: Authorities are exploring measures to protect this local delicacy from ruin.

Causes and Contributing Factors

According to Hayatake from the Japan Fisheries Association, multiple factors are likely contributing to the shellfish die-offs.

• Global Warming and High Temperatures: Rising global temperatures are a primary suspect, directly impacting water temperatures.
• Low Rainfall and Increased Salinity: A lack of rain leads to higher water salt levels, which can negatively affect shellfish health.
• Immobility of Oysters: Unlike fish that can migrate to cooler waters, oysters are sessile and cannot escape unfavorable conditions.
• Broadening Geographic Impact: Hayatake notes that poor harvests are occurring on a larger scale than before. While previously localized, the damage now spans multiple prefectures, including Hyogo, Hiroshima, and Okayama. This widespread impact is considered "unprecedented."

Long-Term Implications and Potential Solutions

The current crisis presents significant long-term challenges for the Japanese seafood industry.

• No Easy Fix: Hayatake emphasizes that there will be no simple solution to the problem.
• Consumer Impact: Shellfish consumers may face significantly higher prices due to reduced supply.
• Production Timelines: Producing and shipping oysters takes one to two years, while scallops can take up to 10 years to reach market size for sashimi. The current lack of growth means these timelines are disrupted.
• Affordability Concerns: The prospect of scallops for sashimi becoming unaffordable is a real concern.
• Multi-pronged Approach Needed: Hayatake advocates for a comprehensive strategy to address the crisis.
• Potential Countermeasures:
  • Breeding Heat-Resistant Varieties: Developing oyster strains that are more resilient to high temperatures.
  • Investigating Root Causes: Thoroughly examining the underlying issues, such as lack of oxygen, high temperatures, and salinity levels.
  • Developing Solutions: Implementing practical measures to resolve these identified problems.

Conclusion

The Japanese seafood industry is grappling with an unprecedented crisis driven by climate change and its cascading effects on shellfish populations. The widespread die-offs of oysters and scallops, coupled with growth stagnation, threaten the livelihoods of farmers and the availability of these products for consumers. While immediate government intervention and financial aid are being considered, a long-term, multi-faceted approach involving scientific research, adaptation strategies, and potentially the development of more resilient species is crucial for the industry's survival. The current situation underscores the urgent need to address environmental challenges impacting food security.