Penaz, 1974



Citation


Penaz, M. (1974) Early development of the nase carp, Chondrostoma nasus (Linnaeus, 1758). Zool. Listy, pp. 275-288

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Chondrostoma nasus Spawning conditions Spawning substrate Lithophilous Lithophils
Chondrostoma nasus Egg Egg adhesiveness The swelling up of the eggs is accompanied by their becoming very sticky Adhesive
Chondrostoma nasus Egg Incubation time The mean duration of incubation (50% embryos hatched), at the overall mean temperature of 11.12°C was 20 days and 23 hours 50.0 days
Chondrostoma nasus Egg Degree-days for incubation About 130-160 at 11.6-15°C [From 99.3-231.3, for 10.0-17.28°C] 145.0 °C * day
Chondrostoma nasus Egg Temperature for incubation 10-17.28°C, temperature tested 13.64 °C
Chondrostoma nasus Egg Egg size after water-hardening The average size of eggs increased from original 1.76 mm to 2.50 mm, their diameter increasing 1.42 times. Under the conditions of the hatchery at Ochoz, at water temepratures of 6.5 to 6.6°C, this stage lasted condiderably longer, about 6 hours. After that time, the average size of eggs of the same materila attained 2.59 mm and increased still during subsequent days of incubation to 2.92 mm (1.66 times increase) 1.76 mm
Chondrostoma nasus Egg Oocyte diameter The average size of eggs increased from original 1.76 mm 1.76 mm
Chondrostoma nasus Spawning conditions Spawning season April in Czech Republic ['April']
Chondrostoma nasus Larvae Temperature during larval development Between 12.4 to 15.4°C 12.4 °C
Chondrostoma nasus Larvae Reaction to light Their photophobia and thigmoplilia are most marked during this stage. The embryos tend to congregate under scarcity of shelters Photopositive
Chondrostoma nasus Larvae Full yolk-sac resorption The yolk sac is present in form of a small remainder which disappears by the end of the stage, i.e. 31 days after insemination or 11-12 days at 14-15°C 11.5 °C * day
Chondrostoma nasus Larvae Onset of exogeneous feeding Starts to ingest food actively at a age of 27 days after insemination (i.e. 7-8 days after hatching at 12.4-14.5°C), having attained a total length of about 12 . The duration is rather short, being about 4 days at water temperature of 14.1-15.4°C 7.5 °C * day
Chondrostoma nasus Larvae Initial larval size 7.09-9.81 [Depending on temperature] 8.45 mm
Chondrostoma nasus Larvae Larvae behaviour Although the hatched embryos still spend most of their times lying passively on one side of the bottom of the through, they sometimes rise to the surface and then sink pasively to the bottom again Demersal