Zelepien, 1997



Citation


Zelepien, J. (1997) Klen [Chub, Leuciscus cephalus (L.)]., pp. 120

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Leuciscus cephalus Spawning conditions Spawning substrate Belongs to a reproductive guilds of lithophils. They spawn on stones or gravel Lithophils
Leuciscus cephalus Spawning conditions Spawning temperature Usually > 18°C 18.0 °C
Leuciscus cephalus Spawning conditions Spawning water type Fast current speed Flowing or turbulent water
Leuciscus cephalus Female Maximum GSI value Just before spawning ovaries may contribute to 1% body mass. Other authors said that at the brginning of spawning ovarian mass depends on female body size and contributes to 7.3-19.6% 13.45 percent
Leuciscus cephalus Male Male sexual dimorphism Fin rays of some chub individuals are intensively coloured during spawning Absent
Leuciscus cephalus Egg Egg adhesiveness Fertilised eggs stick to the substrate due to their sticky and thick egg envelopes Adhesive
Leuciscus cephalus Egg Incubation time At 16620°C incubation period ranges from 150 to 75.4 hours 112.7 days
Leuciscus cephalus Male Onset of spermatogenesis Weight of gonads increase after September ['September']
Leuciscus cephalus Female Relative fecundity 69239 [Size 17 cm], 81372 [Size 24.8 cm], 61449 [Size 35]. Maximum values of relative fecundity was observed in females 24-30 cm long 27.0 thousand eggs/kg
Leuciscus cephalus Male Maximum GSI value Up to 6% 6.0 percent
Leuciscus cephalus Female Age at sexual maturity In Poland, chub usually reach maturity at the age of 3-4 years. Males maturing at the age of 4 years in the river Stobnica. 28% of chub reached maturity at the age 3+, and 60% at the age 4+. In other countries 3-4 year period of maturation was reported. Typically males mature 1-2 years earlier than females. 3.5 years
Leuciscus cephalus Female Resting period Gonads of chub females and males after spawning remain in a resting state until September. No data
Leuciscus cephalus Spawning conditions Spawning migration distance Usually it displays no spawning migration No data
Leuciscus cephalus Female Onset of oogenesis Weight of gonads increase after September ['September']
Leuciscus cephalus Egg Egg size after water-hardening After swelling diameter increases by a factor of 1.3-1.6 1.45 mm
Leuciscus cephalus Female Oocyte development Asynchronous process of oocyte maturation in ovaries was reported. Also observed oocytes of different size and maturity state in pre-spawning chub ovaries. The largest oocytes were released as the first batch of eggs (70-73% of ovary content) Asynchronous
Leuciscus cephalus Male Resting period Gonads of females after spawning remain in spawning remain state until September No data
Leuciscus cephalus Egg Oocyte diameter Diameter of mature eggs ranges from 1.5-2.0 mm 1.75 mm
Leuciscus cephalus Female Absolute fecundity 6370 [Size 17 cm], 22947 [Size 24.8 cm], 51443 [Size 35] 6370.0 thousand eggs
Leuciscus cephalus Spawning conditions Spawning season In European temperate waters chub spawn in spring, usually in May and June ['April', 'May', 'June']
Leuciscus cephalus Female Weight at sexual maturity < 150 g (Sex not specified) 150.0 kg
Leuciscus cephalus Female Length at sexual maturity Length of females was 19.4 cm. Other described fish matured > 20 cm (sex not specified) 19.4 cm
Leuciscus cephalus Male Length at sexual maturity Males maturing were 12.0 cm. 12.0 cm
Leuciscus cephalus Larvae Initial larval size Newly hatched larvae is 5.3-6.5 mm long 5.9 mm
Leuciscus cephalus Male Weight at sexual maturity > 150 g (sex not specified) 150.0 kg
Leuciscus cephalus Female Age at sexual maturity In Poland, chub usually reach maturity at the age of 3-4 years. Females maturing at the age of 6 years in the river Stobnica. 28% of chub reached maturity at the age 3+, and 60% at the age 4+. In other countries 3-4 year period of maturation was reported. 3.5 year
Leuciscus cephalus Spawning conditions Spawning release In natural conditions chub females release maximally two batches of eggs. Russian authors suggest that the number of released batches depends on the time of beginning of breeding season. Females spawning in May can repeat spawning in August, while those maturing in June release only one batch of eggs. Mutliple