Prawochensky and Kolder, 1968



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Hucho hucho Spawning conditions Parental care There is no parental care during the hatching or embryonic phase [After spawning, the parent fish go downstream and keep close to deep places and rocks] No care
Hucho hucho Spawning conditions Spawning substrate Bottom is covered with gravel or coarse sand Ambiguous
Hucho hucho Spawning conditions Spawning site preparation Female sets to work to scoop out a shallow, saucer-like depression, 25-60 cm deep, by means of vigorous, flapping movements of her body and tail, may take several days [During the spawning period, the males are generally very fierce, driving away intruders with great pugnacity and vigour, or engagin in formal combats with other males] No category
Hucho hucho Spawning conditions Spawning temperature 5-10, mainly 5-6°C 7.5 °C
Hucho hucho Spawning conditions Spawning period duration In Poland, the spawning time is between April 20 and 26, in Yugoslavia in the Drava river, between march 18 and 22 20.0 weeks
Hucho hucho Spawning conditions Spawning water type Upper courses of highland rivers, where the stream runs fairly rapidly No category
Hucho hucho Spawning conditions Spawning depth 30-60 cm 45.0 m
Hucho hucho Male Male sexual dimorphism The males undergo marked colour changes, turning red or copper-red Absent
Hucho hucho Egg Degree-days for incubation 294 at 7°C 294.0 °C * day
Hucho hucho Egg Temperature for incubation 7°C 7.0 °C
Hucho hucho Spawning conditions Spawning migration distance Does not undertake large migrations. Unless disturbed, it makes only local migrations in seach of spawning places No data
Hucho hucho Egg Oocyte diameter 4.5-6 [Not specified] 5.25 mm
Hucho hucho Female Absolute fecundity 2.4 [For female 3-5 kg], 3-4 [4-5 kg], 5-6 [6-8 kg], 8-12 [10-12 kg], 18.6 [18 kg] 4.0 thousand eggs
Hucho hucho Spawning conditions Spawning season Spring spawner, it spawns in March and April ['April', 'March']
Hucho hucho Larvae Temperature during larval development The maximum temperature for the alevin is 12°C 12.0 °C
Hucho hucho Larvae Full yolk-sac resorption The period from hatching to the loss of the yolk sac is 164.1 DD 164.1 °C * day
Hucho hucho Female Weight at sexual maturity At the age of 5 years, female weights about 3.5 5.0 kg
Hucho hucho Female Length at sexual maturity At the age of 5 years, female are 65-70 cm long 67.5 cm
Hucho hucho Larvae Larvae behaviour The larvae keep close to the ground, near the spawning place Demersal
Hucho hucho Female Age at sexual maturity The female reach sexual maturity at the age of 5 years, but also described at 3 or 4 5.0 year
Hucho hucho Spawning conditions Parity Spawning takes place once a year No category