Volobuev and Volobuev, 2000



Citation


Volobuev, V.V. and Volobuev, M.V. (2000) Ecology and population structure as principal elements of the formation of the life strategy of Oncorhynchus keta on the continental coast of the Sea of Okhotsk. Journal of Ichthyology [J. Ichthyol.], pp. 443-456

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Oncorhynchus keta Spawning conditions Spawning substrate Gravel bottom Lithophils
Oncorhynchus keta Spawning conditions Spawning temperature 9.8-14.0°C for early spawners and 4-9°C for late spawner 11.9 °C
Oncorhynchus keta Spawning conditions Spawning water type Spawn in both small and large rivers, in the channel, and its tributaries of the first and second orders, and late O. keta spawn mainly in the middle and upper reaches of rivers No category
Oncorhynchus keta Spawning conditions Spawning depth 0.3-2.0 1.15 m
Oncorhynchus keta Egg Incubation time 117-122 in natural conditions 119.5 days
Oncorhynchus keta Female Relative fecundity Different absolute fecundity means found in different rivers: 2658 ±22.3 [Weight: 3.50 ±0.036 kg, in Gizhiga], 2693 ±22.8 [Weight 3.86 ± 0.043 kg in Yama], 2450 ± 32.9 [Weight 3.42 ± 0.048 kg in Arman], 2300 ± 24.1 [Weight 3.31 ±0.065 in Taui], 2597 ± 19.4 [Weight 3.87 ± 0.032 in Khukhtiu], 2683 ±0.040 [Weight 3.65 ±0.040 in Ulya] 2658.0 thousand eggs/kg
Oncorhynchus keta Egg Temperature for incubation 1-4 2.5 °C
Oncorhynchus keta Spawning conditions Spawning migration period Approaches of the spawners to the coastal spawning rivers were noted in the third ten-day period of May. The spawners entered the rivers in the first ten-day period of July. As a rule, the mass migration occurs in the first-second ten-day periods of August. The spawning migration eds mainly in the late August through the second-third ten -day periods of September ['August', 'May', 'July', 'September']
Oncorhynchus keta Spawning conditions Spawning season Early O. keta spawn in July-August, and late in October-December ['October', 'August', 'December', 'July']
Oncorhynchus keta Larvae Larvae behaviour After hatching, the prolarvae stay in the ground for 1-1.5 month Demersal