| Main Ref. | Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984 |
| Mode | dioecism |
| Fertilization | external |
| Mating type | |
| Spawning frequency | once in a lifetime |
| Spawning aggregation | Ref. |
| Batch spawner | Yes. Ref. Chyung, M.-K., 1977 |
| Reproductive guild |
nonguarders open water/substratum egg scatterers |
| Parental Care | none |
| Description of life cycle and mating behavior | During spawning some fish go up the river and some fish spawn on the river shoreline above pebbles. Spawns at night and excavates a 10cm (diameter or depth?) pit. Eggs are around 1 mm in size and adhere to the sand or pebbles for 14 to 20 days before hatching. This fish is semelparous and releases eggs many times over a short period each time releasing ~10,000 eggs. Sometimes females that want to spawn but cannot, save their strength, and go to a deep stagnant pool. These females wait until spring before going up the river with young fish. After hatching, the larvae are 6 mm and flow with the water current eating plankton. Juvenile fish will come again to the river in spring. These live in schools. When schools of Plecoglossus altivelis return to their river they guard their territory and eat food (Ref. 12218). Reproductive mode varies between semelparity and iteroparity. Large females spawn once, while smaller females spawn twice during a two-week interval (Ref. 76896). |
| Search for more references on reproduction | Scirus |