Witkowski, A. and Ciesla, M. and Napora, K. (1997) Jza., pp. 157
| Species | Development state | Trait | Primary Data | Secondary Data |
| Leuciscus idus | Egg | Oocyte diameter | 1.2-1.6 mm [Unswollen egg] | 1.4 mm |
| Leuciscus idus | Egg | Egg size after water-hardening | Swelling increases size of ide eggs from 1.2-1.6 mm to 2.1-2.3 mm | 1.4 mm |
| Leuciscus idus | Egg | Incubation time | In constant temperatures at 7°C incubation lasts 27 days, at 22°C only 5 days. In other studies: 5.5-23 days [At 9.3-13.8°C], 17 days [At 10-12°C], 24 days [At 3-12°C], 11-12 days [At 9.5-15°C], 22 days [At 10.5-17°C], 24-30 days [At 9.2°C] and 9-10 days [10-20.5°C] | 14.25 days |
| Leuciscus idus | Egg | Temperature for incubation | Temperatures < 6 and > 22°C are lethal for developping embryos, optimum temperatures are 13.5-17°C at which survival ranges from 79-84% | 15.25 °C |
| Leuciscus idus | Egg | Degree-days for incubation | 180-200 | 190.0 °C * day |
| Leuciscus idus | Larvae | Initial larval size | Total length of newly-hatched larvae is 5.5-8.7 mm (typically 7 mm). Larger larvae hatch from eggs incubated at higher temperatures, at 9°C : 6.6 (range 6.5-6.8) mm; at 13.4°C : 7.3 (range 6.3-7.5) mm; at 22°C : 7.4 (6.5-8.4) mm. Newly hatched larvae of ide are mode developmentally advanced compared to larvae of other cyprinid fishes | 7.1 mm |
| Leuciscus idus | Larvae | Larvae behaviour | Larvae have well developped cement glands with which they fix themselves to plants where their development occurs. Active swiimming in horizontal position begins 4 days after hatching. At that time their swim bladder is being filled with air | Demersal |
| Leuciscus idus | Larvae | Reaction to light | Larve are not photophobic | Photopositive |
| Leuciscus idus | Larvae | Temperature during larval development | Optimal temperature for larval development is about 17°C. Lethal temperatures are 23.7-29.1°C for ide larvae and juveniles. | 26.4 °C |
| Leuciscus idus | Female | Age at sexual maturity | In southern and central Europe, first spawning-ide are age 3-5 years, sometimes they are 2 years old. In eastern Europe, reproductive period begins at the age of 4 and 5 years. More precisely 6 years [Kävlingean], 5 years [Dniepr], (3) 4 [Dunaj] | 4.0 year |
| Leuciscus idus | Female | Length at sexual maturity | Standard length of females reaches 170-330 mm. More precisely 315-328 [Kävlingean], 190 [Dniepr], 281-306 [Dunaj] for females | 250.0 cm |
| Leuciscus idus | Female | Weight at sexual maturity | 523-760 g [In Sarvlax], 200-300 [In Dunaj], sex not specified | 641.5 kg |
| Leuciscus idus | Female | Relative fecundity | 84 eggs per g of body weight of female | 84.0 thousand eggs/kg |
| Leuciscus idus | Female | Absolute fecundity | Ranges from 8731-263412, mean about 45000 to 88000 | 136071.5 thousand eggs |
| Leuciscus idus | Female | Onset of oogenesis | Ovaries start developing in June | ['June'] |
| Leuciscus idus | Female | Maximum GSI value | GSI of mature females just before spawning (March-April) ranges from 7 to 20%, typically about 12%. In Scandinavian populations GSI value are higher, from 17 to 30% (mean 21%) | 7.0 percent |
| Leuciscus idus | Male | Age at sexual maturity | As a rule, male mature one year earlier than females. In southern and central Europe, first spawning-ide are age 3-5 years, sometimes they are 2 years old. In eastern Europe, reproductive period begins at the age of 4 and 5 years. More precisely 6 years [Kävlingean], 4 years [Dniepr], (3) 4 [Dunaj] | 4.0 years |
| Leuciscus idus | Male | Length at sexual maturity | Standard length of males reaches 180-310 mm. More precisely 220 [Dniepr], 278-310 [Dunaj] for males | 245.0 cm |
| Leuciscus idus | Male | Weight at sexual maturity | 523-760 g [In Sarvlax], 200-300 [In Dunaj], sex not specified | 641.5 kg |
| Leuciscus idus | Male | Male sexual dimorphism | Yellowish or white breeding tubercles apear in males during the spawning on the anterior part of the head | Absent |
| Leuciscus idus | Male | Main spermatogenesis activity | In November, the colour of testes changes from red to whitish, which is indicative of the presence of spermatozoans | ['November'] |
| Leuciscus idus | Male | Maximum GSI value | In March-April, the mass of testes accounts for only 1.8% of body weight | 1.8 percent |
| Leuciscus idus | Spawning conditions | Spawning migration distance | Maximally 2.5 km | 2.5 km |
| Leuciscus idus | Spawning conditions | Spawning migration period | In early spring (beginning of April) ide migrate upstream to spawning grounds. Populations linving in brackish Baltic waters migrate in May-June to spawn in rivers or near-shore lakes | ['April', 'May', 'June'] |
| Leuciscus idus | Spawning conditions | Homing | It was observed that individuals spawn on the same places as in previous years. Thus, homing was reported for ide, similarly as for salmonid (and same other) fish | Present |
| Leuciscus idus | Spawning conditions | Spawning season | In southern and central Europe ide begin spawning in the second half of March or at the beginning of April. In nothern Europe and Siberia, spawning begins later - in the middle of May, or in June | ['March', 'April', 'May', 'June'] |
| Leuciscus idus | Spawning conditions | Spawning period duration | Spanwing is short , 2-5 days at 8-12°C. At lower temperatures may last two weeks, during cold springs spawning duration may be prolonged to> one month | 3.5 weeks |
| Leuciscus idus | Spawning conditions | Spawning temperature | Spawning begins when water temperature increases up to 5.5°C. During spawning mean temperatures of water are 6-10°C, extreme temperatures are 3 and 15°C. | 8.0 °C |
| Leuciscus idus | Spawning conditions | Spawning water type | Ide spawn in rivers, streams, old arms, lakes, dam reservoirs, and meadows covered with flood waters. | Stagnant water |
| Leuciscus idus | Spawning conditions | Spawning substrate | Eggs are deposited on submerged plants, as well as roots, trunks, and branches of fallen trees, but they can be laid on stones, gravel, sand, and a muddy bottom. Thus classified as an indifferent lithophytophilous | Phytophils |
| Leuciscus idus | Spawning conditions | Parity | Maximum life span of ide is 18 years, maximum length (TL) 70 cm, maximum weight 6-8 kg | No category |