Kamler and Keckeis, 2000



Citation


Kamler, E. and Keckeis, H. (2000) Reproduction and early life history of Chondrostoma nasus: implications for recruitment (a review). Pol. Arc. Hydrobiol., pp. 73-85

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Chondrostoma nasus Spawning conditions Mating system The spawning act, in which several males usually are involved, lasts only few seconds No category
Chondrostoma nasus Spawning conditions Parental care After the release of eggs, the females swim a short distance upstreamand then drift passively back to their former position No category
Chondrostoma nasus Spawning conditions Spawning substrate Among stones and gravel: mean of 32.5 mm Lithophils
Chondrostoma nasus Spawning conditions Spawning site preparation Spawns by scattering eggs: the eggs are release into the water column No category
Chondrostoma nasus Spawning conditions Spawning temperature Mean of 9.5 9.5 °C
Chondrostoma nasus Spawning conditions Spawning period duration About 3-4 weeks: Spawning lasts 2-3 days and several spawning acts may occur within one year [During the spanwing season, sholas of males appear at the spawing area often weeks before the females] 3.5 weeks
Chondrostoma nasus Spawning conditions Spawning water type Current velocity: mean of 0.9 cm/s Flowing or turbulent water
Chondrostoma nasus Spawning conditions Spawning depth Mean of 39.9 cm 39.9 m
Chondrostoma nasus Egg Incubation time 8-12 10.0 days
Chondrostoma nasus Egg Temperature for incubation 13-16°C is the optimal temperature for the incubation of eggs 14.5 °C
Chondrostoma nasus Egg Egg Buoyancy Eggs among stones and gravel where their development occurs Demersal
Chondrostoma nasus Spawning conditions Spawning migration period In spring, huge shoals migrate to their spawning areas ['April', 'May', 'June']
Chondrostoma nasus Spawning conditions Spawning season April ['April']
Chondrostoma nasus Larvae Temperature during larval development Optimum temperature: 15-18°C for yolk-sac larvae prior to external deefind, 19°C for early steps, and 22°C for late largae 16.5 °C
Chondrostoma nasus Female Length at sexual maturity Length frequency distribution of the nase population in the River Fischa, Austria, during the period 1992-1997, range mostly from 40 to 48 cm for females. The size of first spawners is 35 cm for females 1994.5 cm
Chondrostoma nasus Male Length at sexual maturity Length frequency distribution of the nase population in the River Fischa, Austria, during the period 1992-1997, range mostly from 40 to 48 cm for males. The size of first spawners is 30 cm for males 44.0 cm
Chondrostoma nasus Spawning conditions Spawning release The spawning act is repeated several times until all eggs are released Mutliple