Hoffmann et al, 1980


Hoffmann, R.P. and Wondrak, P. and Groth, W. (1980) Seasonal anatomical variations in the testes of European pike, Esox lucius L. J. Fish. Biol., pp. 475-482

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Esox lucius Male Onset of spermatogenesis Stage 2, from Septemeber to November ['November']
Esox lucius Male Main spermatogenesis activity Stage III, stage of maturity : December to March/April ['January', 'February', 'March', 'April', 'December']
Esox lucius Male Maximum GSI value 2.04 ± 0.78 [From December to April] 2.04 percent
Esox lucius Male Resting period Stage I, rest from June to August, and stage IV, stage of post-spawning March to May 7.0 months