Rosenblum et al, 1987


Rosenblum, P.M. and Pudney, J. and Callard, I.P. (1987) Gonadal morphology, enzyme histochemistry and plasma steroid levels during the annual reproductive cycle of male and female brown bullhead catfish, Ictalurus nebulosus Lesueur. Journal of Fish Biology, pp. 325-34

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Ameiurus nebulosus Female Onset of oogenesis Between middle of September until late November GSI increased 2-fold ['September', 'November']
Ameiurus nebulosus Female Intensifying oogenesis activity Early May and late June (significantly increase) ['May', 'June']
Ameiurus nebulosus Female Maximum GSI value 5-9 % [Late June] 7.0 percent
Ameiurus nebulosus Female Resting period About 1 (August-September, then slightly increased) 1.0 months
Ameiurus nebulosus Male Main spermatogenesis activity Early May and late June ['May', 'June']
Ameiurus nebulosus Male Maximum GSI value 0.35 (Late June) 0.35 percent
Ameiurus nebulosus Male Resting period 0.15 (October, November) 3.0 months
Ameiurus nebulosus Spawning conditions Spawning season July- August ['July', 'August']
Ameiurus nebulosus Spawning conditions Spawning period duration 3-6 4.5 weeks