Prawochenski, 1964



Citation


Prawochenski, R. (1964) Chondrostoma nasus (Linnaeus, 1758)., pp. 54

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Chondrostoma nasus Spawning conditions Spawning substrate Stones or gravel exposed to water current Ambiguous
Chondrostoma nasus Spawning conditions Spawning temperature 6-8 [In Moselle, France], 8 [Dunajec], 12 [Vistula], 15 [Vistula], according to various authors 7.0 °C
Chondrostoma nasus Spawning conditions Spawning depth Eggs are deposited on shallow depth (< 1m) 1.0 m
Chondrostoma nasus Male Male sexual dimorphism During spawning migrations and during spawning itself nase males have breeding tubercles on gill covers, scales and fins, especially on pectoral fins Absent
Chondrostoma nasus Egg Incubation time Nase eggs hatched after 7 days at 17-18°C 17.5 days
Chondrostoma nasus Female Relative fecundity Realtive fecundity vary from 30 000 eggs/kg for female Age 4, 35057 for female age 5, 33136 for females age 6, 43534 for females age 7, 46080 for females age 10, 36920 for females age 12 30.0 thousand eggs/kg
Chondrostoma nasus Spawning conditions Spawning migration distance Spawning migrations are of short distance. Recaptured four tagged nase spawners. Two of them did not migrate at all, one migrated 8 km (it covered 2 km/day on average), the fourth spawned 14 km (0.7 km/day) 8.0 km
Chondrostoma nasus Egg Egg size after water-hardening Eggs after swelling are 2.2. mm 2.2 mm
Chondrostoma nasus Egg Oocyte diameter Diameter of freshly laid eggs was 1.6 mm 1.6 mm
Chondrostoma nasus Female Absolute fecundity Absolute fecundity vary from 10800 eggs/kg for female Age 4, 16215 for female age 5, 18076 for females age 6, 28297 for females age 7, 41472 for females age 10, 36920 for females age 12 10800.0 thousand eggs
Chondrostoma nasus Spawning conditions Spawning season 12-27 April [Moselle, France], 15 April-5 May [Kuban], 22 April [Don], 10-20 April [Moskva], 10-20 April [Vistula], April [Dunajec], 16 April [Vistula], 19 April [Vistula], 20 April [Vistula], according to various authors ['April', 'May']
Chondrostoma nasus Larvae Initial larval size Newly hatched larvae are 7.0-9.5 mm in length 8.25 mm
Chondrostoma nasus Female Age at sexual maturity Nase mature at third year of life. Their first spawning is at that age No data
Chondrostoma nasus Spawning conditions Spawning release Spawning act is short. Repeated spawnings on the spawning ground were not observed No category