Witokowski and Kokurewicz, 1981



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Hucho hucho Spawning conditions Spawning substrate Gravelly and sandy bottom Ambiguous
Hucho hucho Spawning conditions Spawning site preparation The female is aided by the male in making a nest 120-150 cm in width and 3040 cm in depth, in the bottom of the river No category
Hucho hucho Spawning conditions Spawning temperature The earliest spawning was noted at water temperature of 3.6°C and last spawning was observed at water temperature of 9.2°C. The most intense spawning usually occurs at water temperature of about 7°C 3.6 °C
Hucho hucho Spawning conditions Spawning period duration The earliest spawning was noted on April 6, to mid July (the last spawning was observed on May 13 (the most intense spawning usually occurs by the end of April) 6.0 weeks
Hucho hucho Spawning conditions Spawning water type Rivers and larger streams on the region of the grayling No category
Hucho hucho Spawning conditions Spawning depth 60-100 cm 80.0 m
Hucho hucho Egg Degree-days for incubation 232 DD at 10°C 232.0 °C * day
Hucho hucho Egg Egg size after water-hardening Mature roe is light yellow or light orange and about 5 mm in diameter 5.0 mm
Hucho hucho Female Absolute fecundity Absolute fertility range from 2500-18000, but could even reach 25000 10250.0 thousand eggs
Hucho hucho Spawning conditions Spawning season The spawning begins in April (the earliest spawning was noted on April 6, at water temperature of 3.6°C) and lasts to mid July (the last spawning was observed on May 13, at water temperature of 9.2°C). The most intense spawning usually occurs by the end of April at water temperature of about 7°C ['April', 'May', 'July']
Coregonus clupeaformis Larvae Temperature during larval development 10°C 10.0 °C
Hucho hucho Larvae Full yolk-sac resorption The larval stage from hatching to the complete resorption of the vitelline sac is about 309°D at 10°C [The feeding to larvae began a few days before the completion of the vitelline sac] 309.0 °C * day
Hucho hucho Larvae Initial larval size 10.1 mm in length just after hatching obtained at a constant temperature of 10°C 10.1 mm