Henderson et al, 1996


Henderson, B.A. and Wong, J.L. and Nepszy, S.J. (1996) Reproduction of walleye in Lake Erie: allocation of energy. Can. J. Fish Aquat. Sci., pp. 127-133

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Sander vitreus Female Onset of oogenesis August, mostly in September ['August', 'September']
Sander vitreus Female Intensifying oogenesis activity Increase regularly from September until March, January ? ['January', 'February', 'March', 'September', 'October', 'November']
Sander vitreus Female Maximum GSI value Mean of 16, can reach 20-22 [April] 21.0 percent
Sander vitreus Male Onset of spermatogenesis August ['August']
Sander vitreus Male Main spermatogenesis activity Mostly August-september then remained slowly decreased until March, slight increase ['March', 'August']
Sander vitreus Male Maximum GSI value 4% in August and also 3.3 in April, prior to spawning 4.0 percent