Ciolac, 2004


Citation

Ciolac, A. (2004) Migration of fishes in romanian danube river (N°1). Applied ecology and Environmental Research, pp. 143-163

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Blicca bjoerkna Spawning conditions Spawning migration period In the spring, when water temperatue is about 10-14°C ['April', 'May', 'June']
Abramis brama Spawning conditions Spawning migration period In the spring, when water temperatue is about 10-14°C ['April', 'May', 'June']
Aristichthys nobilis Male Weight at sexual maturity Most of the caught individuals weigthed 6-12 kg; this size is a characteristic of the sexually mature individuals 9.0 kg
Aristichthys nobilis Spawning conditions Spawning migration period In May, there is an increasing amount of adults, probably as a result of the start of the crowding process that usually precedes the upstream migration. In June, the capture was the largest one; it signalises the peak of migration. The water temperature is of 19°C to 24°C ['May', 'June']
Aristichthys nobilis Spawning conditions Spawning season The grass carp spawns earlier, at a lower temperature than silver carp and big head No data
Aristichthys nobilis Spawning conditions Spawning temperature The water temperature stabilized for a relatively large period of time in the interval of 18°C to at least 22°C 18.0 °C
Aristichthys nobilis Spawning conditions Spawning water type The existence and the persistence of the increasing water level, the water flow up to 3 m per second No category
Aristichthys nobilis Spawning conditions Spawning substrate The silver carp an the grass carp seem to prefer the superficial waters as well as the big head stay in the deeper horizons of the water Phytophils
Carassius auratus Spawning conditions Spawning migration period In the spring, when water temperatue is about 10-14°C ['April', 'May', 'June']
Ctenopharyngodon idella Male Weight at sexual maturity Most of the caught individuals weigthed 6-12 kg; this size is a characteristic of the sexually mature individuals 9.0 kg
Ctenopharyngodon idella Spawning conditions Spawning migration period In May, there is an increasing amount of adults, probably as a result of the start of the crowding process that usually precedes the upstream migration. In June, the capture was the largest one; it signalises the peak of migration. The water temperature is of 19°C to 24°C ['May', 'June']
Ctenopharyngodon idella Spawning conditions Spawning season The grass carp spawns earlier, at a lower temperature than silver carp and big head No data
Ctenopharyngodon idella Spawning conditions Spawning temperature The water temperature stabilized for a relatively large period of time in the interval of 18°C to at least 22°C 18.0 °C
Ctenopharyngodon idella Spawning conditions Spawning water type The existence and the persistence of the increasing water level, the water flow up to 3 m per second No category
Ctenopharyngodon idella Spawning conditions Spawning substrate The silver carp an the grass carp seem to prefer the superficial waters as well as the big head stay in the deeper horizons of the water Phytophils
Cyprinus carpio Female Age at sexual maturity The common carp becomes sexualy mature in the Romanian Danube River at the age of 4 years for female 4.0 year
Cyprinus carpio Female Length at sexual maturity Beetween means of 36.2 to 41.0 according to different areas for females 36.2 cm
Cyprinus carpio Female Absolute fecundity Average of 85 85.0 thousand eggs
Cyprinus carpio Male Age at sexual maturity The common carp becomes sexualy mature in the Romanian Danube River at the age of 3 years for male 3.0 years
Cyprinus carpio Male Length at sexual maturity Between means of 28.9 to 34.9 according to different areas for males 28.9 cm
Cyprinus carpio Spawning conditions Spawning migration period The carp migration usually starts in April when the water temperature is about 12°C and it has the highest intensity in May when the water temperature is aournd 16°C. The water temperature of 18°C to 20°C is the optimum for spawning. ['April', 'May']
Cyprinus carpio Spawning conditions Spawning migration period In the spring, when water temperatue is about 10-14°C ['April', 'May', 'June']
Cyprinus carpio Spawning conditions Spawning temperature The water temperature of 18°C to 20°C is the optimum for spawning 18.0 °C
Hypophthalmichthys molitrix Male Weight at sexual maturity Most of the caught individuals weigthed 6-12 kg; this size is a characteristic of the sexually mature individuals 9.0 kg
Hypophthalmichthys molitrix Spawning conditions Spawning migration period In May, there is an increasing amount of adults, probably as a result of the start of the crowding process that usually precedes the upstream migration. In June, the capture was the largest one; it signalises the peak of migration. The water temperature is of 19°C to 24°C ['May', 'June']
Hypophthalmichthys molitrix Spawning conditions Spawning season The grass carp spawns earlier, at a lower temperature than silver carp and big head No data
Hypophthalmichthys molitrix Spawning conditions Spawning temperature The water temperature stabilized for a relatively large period of time in the interval of 18°C to at least 22°C 18.0 °C
Hypophthalmichthys molitrix Spawning conditions Spawning water type The existence and the persistence of the increasing water level, the water flow up to 3 m per second No category
Hypophthalmichthys molitrix Spawning conditions Spawning substrate The silver carp an the grass carp seem to prefer the superficial waters as well as the big head stay in the deeper horizons of the water Phytophils
Leuciscus idus Spawning conditions Spawning migration period Leave their winter shelters from the main channel of danube for entering into the spawning areas when water temperature is about 4-6°C ['January', 'February', 'March']
Sander lucioperca Spawning conditions Spawning migration period Leave their winter shelters from the main channel of danube for entering into the spawning areas when water temperature is about 4-6°C ['January', 'February', 'March']
Silurus glanis Spawning conditions Spawning migration period Leave their winter shelters from the main channel of danube for entering into the spawning areas when water temperature is about 4-6°C ['January', 'February', 'March']