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Declining Oyashio Fisheries: Changes In Resources And Fishing Grounds.pdf

2_4_2_Yonezaki_eng_original_072121.pdf
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🔗 Source: japan.edf.org
📊 Size: 1.09 MB
👤 Author: 米崎 史郎
⬇️ Downloads: 46

Summary

Key findings include:

1. Decrease in Japanese Flying Squid Catches: There has been a marked decline in catches of Japanese flying squid, a crucial species in the region.

2. Shifting Distribution of Pacific Saury: The distribution and fishing grounds for Pacific saury have also experienced changes, potentially linked to broader oceanographic shifts within the Oyashio current system.

3. Ecosystem-Wide Impacts: These changes ripple through the ecosystem, affecting nursery grounds, spawning areas, and migratory patterns of various species, including:
Oyashio: This cold, nutrient-rich current supports a diverse array of marine life.
 Kuroshio: A warmer current that interacts with Oyashio, influencing species distribution and migration.
Tsushima Warm Current: A significant sea current contributing to the region's unique biodiversity.

4. Standardized CPUE Declines: Data showing standardized catch per unit effort (CPUE) for Japanese flying squid reveals a consistent downward trend over time, indicating a severe decline in population size.

5. Future Research Needs: The report emphasizes the need for further research to understand these changes, including:
 Tracking migratory patterns of key species.
Investigating the impact of climate change on ocean currents and marine ecosystems within the Oyashio current region.
 Developing sustainable fishing practices to ensure the long-term health of these valuable resources.

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Description

The Oyashio Current has experienced a significant decline in fisheries resources, particularly with the reduction of Japanese flying squid catches. This shift is accompanied by changes in the distribution and fishing grounds of Pacific saury, impacting regions from Russia to Korea and Japan. The study highlights the need for further research on these socio-ecological shifts.

Technical Information

  • File Format: PDF
  • File Size: 1.09 MB
  • Pages: 15
  • Language: EN
  • Author: 米崎 史郎
  • Total Downloads: 46
  • Last Updated: 4 days ago

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