| Main Ref.: | Spratte, S and U. Hartmann, 1998 | |||||||||||
| Data Reference: | Spratte, S and U. Hartmann, 1998 | |||||||||||
| Country: | Germany | |||||||||||
| Spawning ground: | riverine | |||||||||||
| Locality: | Schleswig-Holstein | |||||||||||
| Season: |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 111 | 111 | 111 | 111 | |||||||||
| Sex ratio: | % Ref.: | |||||||||||
| Temperature: | - °C | |||||||||||
| Gestation period: | month/s | |||||||||||
| Length of offspring: | cm | |||||||||||
| Batch spawners | ||||||||||||
| Daily spawning frequency |
- Mean: |
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Min Ref.: Max Ref.: Mean Ref.: |
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| Comments: | In spring mature specimens enter rivers. They build nests from relatively large stones. After spawning they die. Ammocoetes larvae hatch after 7-14 days and live for 2-5 years in the river bed before they metamorphose and migrate to the sea. | |||||||||||