Legendre, 1997



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Ictalurus punctatus Spawning conditions Mating system It takes 4 to 12 hours for a brood fish pair to complete an egg mass with eggs being release five times per gour No category
Ictalurus punctatus Spawning conditions Parental care The males assume care of the egg mass after oviposition No category
Silurus glanis Spawning conditions Parental care Guarded by the male Male parental care
Ictalurus punctatus Spawning conditions Spawning substrate In nature, it spawns under edges, around or in submerged logs, stupms or roots and in cavities in the bank No category
Ictalurus punctatus Spawning conditions Spawning site preparation Male typically prepares a nest by clearing soft mud and debris from an easily protected area No category
Silurus glanis Spawning conditions Spawning site preparation The male cleans the nest and after a period of courtship spawning takes place Nest built by male
Ictalurus punctatus Spawning conditions Spawning temperature Begin to spawn when the minimum water temperature exceeds 21°C for several days, normal spawning temperature is from 21 to 29 with 26 considered to be optimal 21.0 °C
Silurus glanis Spawning conditions Spawning temperature Spawning can be started as soon as the pond water temperature reaches 20-22°C 21.0 °C
Ictalurus punctatus Female Maximum GSI value 15 [GSI usually found in female broodstock] 15.0 percent
Silurus glanis Female Maximum GSI value 3-15 [GSI usually found in female broodstock] 9.0 percent
Ictalurus punctatus Male Male sexual dimorphism Secondary sexual characteristics are strongly pronounced. Mature males display a broad, muscular head wider than the body and thickened lips, while head of females remains slender Absent
Silurus glanis Male Male sexual dimorphism Sexual dimorphism is not very pronounced. Females have a comparatively more oval, convex and blunt genital papilla, while male present a more conical papilla and a brush part on the first spin ray of the pectoral fin, but difficulty on distinguishing differences may lead to erros in sexing Absent
Ictalurus punctatus Egg Egg adhesiveness Eggs adhere together Adhesive
Silurus glanis Egg Egg adhesiveness Adhere to the substrate via a thich mucous coating [adhere to the nest] Adhesive
Ictalurus punctatus Egg Incubation time 5-8 at 25-28°C 6.5 days
Silurus glanis Egg Incubation time 2-3 days at 22-25°C 2.5 days
Ictalurus punctatus Female Relative fecundity 8 [Usual fecundity of female broodfish] 8.0 thousand eggs/kg
Silurus glanis Female Relative fecundity 10-25 [Usual fecundity of female broodfish] 17.5 thousand eggs/kg
Ictalurus punctatus Male Maximum GSI value In captivity GSI reaches 0.25 0.25 percent
Silurus glanis Male Maximum GSI value In captivity GSI reaches 1-1.5% 1.25 percent
Ictalurus punctatus Female Age at sexual maturity Can mature as early as 2 years, but broodfish of at 3 years are preferred [ex not specified] 2.0 years
Ictalurus punctatus Egg Temperature for incubation 25-28 [Water temperatures of 30°C or higher can adversely affect egg development and fry survival 26.5 °C
Ictalurus punctatus Egg Egg size after water-hardening 3.5 [Fertilized swollen egg] 3.5 mm
Silurus glanis Egg Egg size after water-hardening 3.5 [Fertilized swollen egg] 3.5 mm
Ictalurus punctatus Egg Egg Buoyancy Most catfish possess demersal eggs Demersal
Silurus glanis Egg Egg Buoyancy Most catfish possess demersal eggs Demersal
Ictalurus punctatus Egg Oocyte diameter 3 [Ovocyte] 3.0 mm
Silurus glanis Egg Oocyte diameter 2.5-2.9 [Ovocyte] 2.7 mm
Ictalurus punctatus Larvae Temperature during larval development Water temperatures of 30°C or higher can adversely affect egg development and fry survival 30.0 °C
Ictalurus punctatus Female Weight at sexual maturity Can mature as early as 0.34 kg, but broodfish of at least 1.5 kg are preferred sex not specified] 0.34 kg
Ictalurus punctatus Male Weight at sexual maturity Can mature as early as 0.34 kg, but broodfish of at least 1.5 kg are preferred sex not specified] 0.34 kg
Ictalurus punctatus Female Age at sexual maturity Can mature as early as 2 years, but broodfish of at least 3 years are preferred 2.0 year
Ictalurus punctatus Spawning conditions Spawning release Sequential spawners. Periodically the female deposits a layer of eggs and the male fertilizes them No category
Silurus glanis Spawning conditions Spawning release After reaching maturity in nature, reproduce only once year Total
Ictalurus punctatus Spawning conditions Parity After reaching maturity in nature, reproduce only once year No category
Silurus glanis Spawning conditions Parity After reaching maturity in nature, reproduce only once year No category