Abdusamadov, 1986



Citation


Abdusamadov, A.S. (1986) Biology of white amur, Ctenopharyngodon idella , silver carp, Hypophthalmichthys molitrix , and bighead, Aristichthys nobilis, acclimatized in the Terek region of the Caspian Basin. Journal of Ichthyology, pp. 41-49

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Aristichthys nobilis Egg Egg Buoyancy Drifting egg [The largest number of eggs are found in the upper water layer in the main river chanel] Pelagic
Aristichthys nobilis Egg Incubation time 34-36 hour [23-25°C], 50-70 h [18-20°C] 35.0 days
Aristichthys nobilis Egg Temperature for incubation 23-25 [But also at lower Temperature: 18-20] 24.0 °C
Aristichthys nobilis Egg Degree-days for incubation 35-50 42.5 °C * day
Aristichthys nobilis Female Age at sexual maturity Most (81%) at 6-7 [Some at 5] 6.5 year
Aristichthys nobilis Female Length at sexual maturity Most (81%) 75-100 [16% at 76] 87.5 cm
Aristichthys nobilis Female Weight at sexual maturity 9.3 [16% at 7.9 kg] 9.3 kg
Aristichthys nobilis Female Absolute fecundity 313.6 to 1860.800 313.6 thousand eggs
Aristichthys nobilis Male Age at sexual maturity 5-7 make up most of the run, about 90 % [Smallest male of 5] 6.0 years
Aristichthys nobilis Male Length at sexual maturity 81-90 for 90% of males [75 for smallest male] 85.5 cm
Aristichthys nobilis Male Weight at sexual maturity 7.1 [For smallest male] 7.1 kg
Aristichthys nobilis Spawning conditions Spawning migration distance About 125-260 km 192.5 km
Aristichthys nobilis Spawning conditions Spawning migration period Spawing migrations starts in the second week of May at 18-19°C ['May']
Aristichthys nobilis Spawning conditions Spawning season Spawning period continues from April to July [Mass spawning takes place at the end of May and in the beginning of June] ['April', 'May', 'June', 'July']
Aristichthys nobilis Spawning conditions Spawning period duration Spawning period continues from April to July [Mass spawning takes place at the end of May and in the beginning of June] No data
Aristichthys nobilis Spawning conditions Spawning temperature 18-20 19.0 °C
Aristichthys nobilis Spawning conditions Spawning water type Spawning takes place after a sharp rise in the water level and current velocity Flowing or turbulent water
Ctenopharyngodon idella Egg Egg Buoyancy Drifting egg [The largest number of eggs are found in the upper water layer in the main river chanel] Pelagic
Ctenopharyngodon idella Egg Incubation time 34-36 hour [23-25°C], 50-70 h [18-20°C] 35.0 days
Ctenopharyngodon idella Egg Temperature for incubation 23-25 [But also at lower T: 18-20] 24.0 °C
Ctenopharyngodon idella Egg Degree-days for incubation 35-50 42.5 °C * day
Ctenopharyngodon idella Female Age at sexual maturity 5.0 5.0 year
Ctenopharyngodon idella Female Length at sexual maturity 65 65.0 cm
Ctenopharyngodon idella Female Weight at sexual maturity 5.8 5.8 kg
Ctenopharyngodon idella Female Absolute fecundity Mean of 765 [Range 210.500-1230.700] 720.6 thousand eggs
Ctenopharyngodon idella Male Age at sexual maturity 4.0 4.0 years
Ctenopharyngodon idella Male Length at sexual maturity 63 63.0 cm
Ctenopharyngodon idella Male Weight at sexual maturity 5.0 5.0 kg
Ctenopharyngodon idella Spawning conditions Spawning migration distance About 125-260 km 192.5 km
Ctenopharyngodon idella Spawning conditions Spawning migration period Spawning migration begins in mid-April at 15-17°C, the most intensive spawning migration is observed during 1-20 May ['April', 'May']
Ctenopharyngodon idella Spawning conditions Spawning season Spawning period continues from April to July [Mass spawning takes place at the end of May and in the beginning of June] ['April', 'May', 'June', 'July']
Ctenopharyngodon idella Spawning conditions Spawning period duration 6-8 [Spawning period continues from April to July [Mass spawning takes place at the end of May and in the beginning of June]] 7.0 weeks
Ctenopharyngodon idella Spawning conditions Spawning temperature 18-20 19.0 °C
Ctenopharyngodon idella Spawning conditions Spawning water type Spawning takes place after a sharp rise in the water level and current velocity Flowing or turbulent water
Hypophthalmichthys molitrix Egg Egg Buoyancy Drifting egg [The largest number of eggs are found in the upper water layer in the main river chanel] Pelagic
Hypophthalmichthys molitrix Egg Incubation time 34-36 hour [23-25°C], 50-70 hour [18-20°C] 35.0 days
Hypophthalmichthys molitrix Egg Temperature for incubation 23-25 [But also at lower T: 18-20] 24.0 °C
Hypophthalmichthys molitrix Egg Degree-days for incubation 35-50 42.5 °C * day
Hypophthalmichthys molitrix Female Age at sexual maturity 5, but most 7-8, females 7.5 year
Hypophthalmichthys molitrix Female Length at sexual maturity 66 66.0 cm
Hypophthalmichthys molitrix Female Weight at sexual maturity 4.8 4.8 kg
Hypophthalmichthys molitrix Female Absolute fecundity From 315.100 to 1340.5 [Average 812.2] 315.1 thousand eggs
Hypophthalmichthys molitrix Male Age at sexual maturity 4, most 5-7 6.0 years
Hypophthalmichthys molitrix Male Length at sexual maturity 61 61.0 cm
Hypophthalmichthys molitrix Male Weight at sexual maturity 4.8 4.8 kg
Hypophthalmichthys molitrix Spawning conditions Spawning migration distance About 125-260 km 192.5 km
Hypophthalmichthys molitrix Spawning conditions Spawning migration period The beginning of the spawning migration occurred at the end of April, at 16-17°C, the peak was observed in the middle and at the end of May and in the beginning of June ['April', 'May', 'June']
Hypophthalmichthys molitrix Spawning conditions Spawning season Spawning period continues from April to July [Mass spawning takes place at the end of May and in the beginning of June] ['April', 'May', 'June', 'July']
Hypophthalmichthys molitrix Spawning conditions Spawning temperature 18-20 19.0 °C
Hypophthalmichthys molitrix Spawning conditions Spawning water type Spawning takes place after a sharp rise in the water level and current velocity Flowing or turbulent water