Heming et al, 1982


No detailed citation.

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Oncorhynchus tshawytscha Egg Temperature for incubation Mean water temperature during the incubation period were 6, 8, 10 and 12 6.0 °C
Oncorhynchus tshawytscha Egg Degree-days for incubation Incubation time to 50% hatching varied inversely with temperature from 95d (556 tu) at 6°C, to 71 d (556 tu) at 8°C, to 55 days (534 tu) at 10°C and 44 days (520 tu) at 12°C 50.0 °C * day
Oncorhynchus tshawytscha Larvae Temperature during larval development Water temperature during the feeding studies averaged 6 to 12 °C 12.0 °C
Oncorhynchus tshawytscha Larvae Full yolk-sac resorption 870-920 [Thermal units from fertilization at complete yolk absorption averaged 1456 ± 22 among the test temperatures: 250 days (6°C), 180 (8°C), 150 (10°C) and 120 (12°C), minus 95, 71, 55, 44 days for incubation respectively, thus vary between 870-920] 1456.0 °C * day
Oncorhynchus tshawytscha Larvae Onset of exogeneous feeding 437 [At 12°C], 464 [10°C], 482 [8°C] and 523 [6°C] posu hatching [It would be of little benefit to initiate food presentation before 905 tu, the point at which 50% of alevins were first able to ingest food at all four tested temperature, between 6-12°C, less than about ca.520-556 for incubation; This optimum feeding zone existed at temperatures below 12°C, between 905 thermal units (tu) postfertilization and a point (F, tu) which varied with temperature (T, °C) as F= 1201.1-20.3 T 9.0 °C * day