 |
 |
 |
 |
 |
|
|---|---|---|---|---|---|
| 1 | upstream migration | 遡河同遊 | |||
| 2 | natural upstream migration | 自然遡上 | |||
| 3 | upstream migration for spawning | 産卵遡上 | |||
| 4 | upstream migration of fish | 魚類の遡上 | |||
|
|
|
|
|
|
|---|---|---|---|---|---|
| 1 | upstream migration | 遡河同遊 | |||
| 2 | natural upstream migration | 自然遡上 | |||
| 3 | upstream migration for spawning | 産卵遡上 | |||
| 4 | upstream migration of fish | 魚類の遡上 | |||