科学｜アユの遡上数が激増した理由 / Science | The Reasons Behind the Dramatic Increase in the Number of Ayu Fish Returning to Spawn

Summary

It has been reported that the number of sweetfish migrating up the Hino River in Tottori Prefecture has increased 600 times over the past six years.

This year, a particularly bountiful sweetfish catch is expected, with anglers able to catch up to five fish in just 30 minutes. According to the fishing cooperative, this increase is believed to be due to improvements in the river’s environment and better living conditions for the fish. Local conservation efforts are said to be contributing to the successful breeding of sweetfish.

Dialogue

This dialogue is fictional and based on the article.

Log: I heard that the number of sweetfish migrating up the Hino River has increased by 600 times recently. I wonder why there’s such a huge increase?
Chako: Wow! 600 times? That’s amazing! Why are so many coming now?
Log: According to the fishing association, it seems that the improvement of the river’s environment has played a big role.
Chako: So, because the environment has improved, sweetfish are coming back in greater numbers!
Navi: A healthy river ecosystem is a crucial factor for the breeding of sweetfish. It’s believed that environmental improvements have enhanced their living conditions.
Chako: I see! When nature is thriving, the fish thrive too!

Admin’s Note

The news of the significant increase in the number of ayu fish returning upstream seems to reflect the success of local environmental conservation efforts. The fact that anglers can enjoy a bountiful catch is likely to have a positive impact on the regional economy and community as well. I hope that such improvements to the natural environment continue, leading to sustainable fishing practices. This article has reminded me of the importance of coexisting with nature.