Bakkala, R.G. (1970) Synopsis of biological data on the chum salmon, Oncorhynchus keta (Walbaum) 1792., pp.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Oncorhynchus keta | Egg | Egg size after water-hardening | Fertilized eggs are about 6.0-9.5 | 7.75 mm |
| Oncorhynchus keta | Egg | Incubation time | 46 [7-15°], 62-63 [11-11.5°C], 122-128 [3.4°C] | 11.0 days |
| Oncorhynchus keta | Egg | Temperature for incubation | Tested from 0-15°C | 7.5 °C |
| Oncorhynchus keta | Egg | Degree-days for incubation | 408-420 [3.4°C], 510-589 [9.7-9.9°C] | 414.0 °C * day |
| Oncorhynchus keta | Larvae | Initial larval size | 20.5 at haching | 20.5 mm |
| Oncorhynchus keta | Larvae | Larvae behaviour | Alevins remain in the gravel until their yolk sacs are completety or almost completely absorbed. | Demersal |
| Oncorhynchus keta | Larvae | Full yolk-sac resorption | The alelvins phase is completed in 30 to 60 days | 30.0 °C * day |
| Oncorhynchus keta | Female | Absolute fecundity | Range mostly between 2-4, most are 2-3, wider range 0.9-8 | 3.0 thousand eggs |
| Oncorhynchus keta | Female | Maximum GSI value | Mean of 14.3, range 14.0 to 16.6 | 14.3 percent |
| Oncorhynchus keta | Male | Male sexual dimorphism | The mature male is distinguished from the mature female by a hooked snout and more fanglike teeth | Absent |
| Oncorhynchus keta | Spawning conditions | Spawning migration distance | Spawn in streams ranging from short coastal streams, where the adults may spawn within the tidal zone, to large river systems, such as the Amur River in the U.S.S.R. and the Yukon River in Alaska, where adults are known to migrate upstream over 2,500 km | 500.0 km |
| Oncorhynchus keta | Spawning conditions | Spawning migration period | Enter streams when temperature drop to 15°C, most enter at 10-12°C, peaks of migration varied from 7-11°C | No data |
| Oncorhynchus keta | Spawning conditions | Homing | They return to spawn in the stream from which they originated [Share the strong homing tendencies of other species] | Present |
| Oncorhynchus keta | Spawning conditions | Spawning season | Most spawn before the end of August or the beginning of September. Nothern populations have peak periods of spawning in August or early September, southern populations in October to November | ['August', 'September', 'October', 'November'] |
| Oncorhynchus keta | Spawning conditions | Spawning period duration | Spawning activity for males after they had chosen mates: spawning, which lasted 2 to 5 days; and extirpation, which lasted 1 to 5 days [Females passed through three spawning phases: Phase 1, spawning lasted 2 to 4 days and consisted of preparation of the redd, deposition of eggs, guarding the redd, and association with one or more males; pahse 2 post-spawning which lasted less than 1 to as much as 5 days- spawning ceased even though males wre still in attendance and females guarded the redds against intruding females; phase 3, extirpation which lasted 1 to 6 days, females were no longer attended by males and passively guarded the redds | 2.0 weeks |
| Oncorhynchus keta | Spawning conditions | Spawning temperature | Generally select areas with upwelling springs where winter temperatures exceed 4°C, thus protecting the eggs from freezing | 4.0 °C |
| Oncorhynchus keta | Spawning conditions | Spawning water type | Water velocities seclected by autumn chum salmon in Hokkaido were 10 to 20 cm/s [summer chum salmon in the My River spawned in velocities of 10 to 100 cm/sec] | Flowing or turbulent water |
| Oncorhynchus keta | Spawning conditions | Spawning depth | About 20 to 110 cm | 20.0 m |
| Oncorhynchus keta | Spawning conditions | Spawning substrate | Gravel sizes which averaged 25% less than 0.5 cm, 45% from 0.6 to 3.0 cm and 30 percent greater than 3.1 cm [In tributaries of the Columbia rivers, redds were found to consist of gravel greater than 15 cm (13%), 15 cm or less (81%) | Lithophils |
| Oncorhynchus keta | Spawning conditions | Spawning site preparation | Females passed through three spawning phases: Phase 1, spawning lasted 2 to 4 days and consisted of preparation of the redd, deposition of eggs, guarding the redd, and association with one or more males | Susbtrate chooser |
| Oncorhynchus keta | Spawning conditions | Mating system | Promiscuous, male frequently attend more than one female | Promiscuity |
| Oncorhynchus keta | Spawning conditions | Parity | All species of Oncorhynchus die after spawning | Semelparous |
| Oncorhynchus keta | Spawning conditions | Parental care | Phase 2 post-spawning which lasted less than 1 to as much as 5 days- spawning ceased even though males wre still in attendance and females guarded the redds against intruding females; phase 3, extirpation which lasted 1 to 6 days, females were no longer attended by males and passively guarded the redds | Male parental care |