Belyanina, T.N. (1969) Synopsis of biological data on smelt., pp.
Species | Development state | Trait | Primary Data | Secondary Data |
Osmerus eperlanus | Egg | Oocyte diameter | Average 0.70-0.80, range 0.55-1.06 | 0.75 mm |
Osmerus eperlanus | Egg | Egg size after water-hardening | After extrusion into water, the egg immeadiatly swells, its diameter increases about 0.2 mm | 0.2 mm |
Osmerus eperlanus | Egg | Egg Buoyancy | Some of the eggs become detached and float with help of the outer coat, but seems to be only dead eggs | Pelagic |
Osmerus eperlanus | Egg | Egg adhesiveness | Fertilized eggs adhere to the substratum | Adhesive |
Osmerus eperlanus | Egg | Incubation time | 10-14 | 12.0 days |
Osmerus eperlanus | Egg | Temperature for incubation | 8.5-10.5 | 9.5 °C |
Osmerus eperlanus | Egg | Degree-days for incubation | From 60-110 to 140-180 | 85.0 °C * day |
Osmerus eperlanus | Larvae | Initial larval size | 3.8-6.0 | 4.9 mm |
Osmerus eperlanus | Larvae | Reaction to light | Hatching larvae react positively to light [But strong light destroys developing eggs] | Photopositive |
Osmerus eperlanus | Larvae | Full yolk-sac resorption | 120-140 [Live without feeding for 10-14 days at 10-12°C] | 130.0 °C * day |
Osmerus eperlanus | Female | Age at sexual maturity | Mostly 2-3, rarely 1 and up to 7-8 [Both sex] | 2.5 year |
Osmerus eperlanus | Female | Length at sexual maturity | Average: 9-18, from 4.7-8.2, to 19.6-23.4 in g [Both sex] | 13.5 cm |
Osmerus eperlanus | Female | Weight at sexual maturity | Average: 5-8, range from 1.5-3.5 to 53.0-94.0 in g !!! [Both sex] | 6.5 kg |
Osmerus eperlanus | Female | Relative fecundity | Average: 500-700, range 350-1050 | 600.0 thousand eggs/kg |
Osmerus eperlanus | Female | Absolute fecundity | Average 37.6-95.5 | 66.55 thousand eggs |
Osmerus eperlanus | Female | Maximum GSI value | About 18-22% | 20.0 percent |
Osmerus eperlanus | Male | Age at sexual maturity | Mostly 2-3, rarely 1 and up to 7-8 [Both sex] | 2.5 years |
Osmerus eperlanus | Male | Length at sexual maturity | Average: 9-18, from 4.7-8.2, to 19.6-23.4 in g [Both sex] | 13.5 cm |
Osmerus eperlanus | Male | Weight at sexual maturity | Average: 5-8, range from 1.5-3.5 to 53.0-94.0 in g !!! [Both sex] | 6.5 kg |
Osmerus eperlanus | Male | Maximum GSI value | About 5 | 5.0 percent |
Osmerus eperlanus | Spawning conditions | Spawning migration distance | Greatly varies, from 2-3, up to 1000 km, average 50-200 | 2.5 km |
Osmerus eperlanus | Spawning conditions | Spawning migration period | From March to early July depending on areas [The spawning run begins within the first 10 days after the ice has broken] | ['March', 'July'] |
Osmerus eperlanus | Spawning conditions | Spawning period duration | For about one month, but peak spawning usually last only 2-4 days [Males spawn for a longer time and stay at the spawning grounds longer than females] | 3.0 weeks |
Osmerus eperlanus | Spawning conditions | Spawning temperature | Begins about 4, peak occurs at 6-9 [Sometimes start at 1-2°C lower or higher than 4], avoid temperatures lower than 4°C and higher than 12°C | 7.5 °C |
Osmerus eperlanus | Spawning conditions | Spawning water type | Enters rivers and spawns at high tide, some spawn near river mouths and do not ascend the rivers [Water velocity is about 0.3-2 m/s] | Flowing or turbulent water |
Osmerus eperlanus | Spawning conditions | Spawning depth | Greatly varies, from several centimetres to several metres, up to 17 m in some lakes | 17.0 m |
Osmerus eperlanus | Spawning conditions | Spawning substrate | Stones, pebbles, water plants, submerged parts of bushes, grass and other things. They do not occur on muddy bottom | Phytophils |
Osmerus eperlanus | Spawning conditions | Spawning site preparation | Does not make nests | No category |
Osmerus eperlanus | Spawning conditions | Nycthemeral period of oviposition | As a rule smelt spawn at night | Night |
Osmerus eperlanus | Spawning conditions | Mating system | By pair: Each female usually spawns in the compagny of one male. The females extrudes her eggs, then leaves the spawning ground. Males continues spawning with other females. | Monogamy |
Osmerus eperlanus | Spawning conditions | Parity | Spawns either once a year, or not every year [From one to two or three times during a lifetime] | Iteroparous |
Osmerus eperlanus | Spawning conditions | Parental care | Does not guard eggs and larvae | No care |