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| Main Ref: | Keith, P. and J. Allardi (coords.), 2001 | |||||||||||
| Data Ref.: | Keith, P. and J. Allardi (coords.), 2001 | |||||||||||
| Country: | France | |||||||||||
| Spawning ground: | riverine | |||||||||||
| Locality: | Rhine | |||||||||||
| Season: |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 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: | Spawning occurs in zones with swift current, on a substrate of stones, gravel or coarse sand. The males have tubercles on the body and specially on the head during reproduction (Ref. 30578). | |||||||||||
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