Jensen et al, 2001


Jensen, K.M. and Korte, J.J. and Kahl, M.D. and Pasha, M.S. and Ankley, G.T. (2001) Aspects of basic reproductive biology and endocrinology in the fathead minnow (Pimephales promelas). Comparative Biochemistry and Physiology, C [Comp. Biochem. Physiol., C], pp. 127-141

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Pimephales promelas Female Oocyte development Group-synchronous or asynchronous gonadal development Group-synchronous
Pimephales promelas Female Maximum GSI value Mean GSI of 9.71 ± 0.5, up to 12 9.71 percent
Pimephales promelas Male Male sexual dimorphism Nuptial tubercles in reproductively-active male Present
Pimephales promelas Male Maximum GSI value 1.15 ± 0.02, 1.2 1.15 percent
Pimephales promelas Spawning conditions Spawning period duration The spawning interval for reproductively-active pairs over the course of the study ranged from 1-15 days, with the majority of values falling in the range of 3-4 days 8.0 weeks
Pimephales promelas Spawning conditions Mating system By pair Monogamy
Pimephales promelas Spawning conditions Spawning release Multiple of fractional spawner Multiple
Pimephales promelas Spawning conditions Spawning release The number of eggs per spawn per female ranged from 46 to 130, with a mean value of 85 ± 2.8[Under facorable conditions, females can produce clutches of 50-100 eggs every 3-5 days] No category