Heese, 1990


Heese, T. (1990) Gonad development and fecundity of whitefish, Coregonus lavaretus (L. 1758) from the Pomeranian Bay. Acta Ichthyologica et Piscatoria [ACTA ICHTHYOL. PISC.], pp. 3-12

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Coregonus lavaretus Female Age at sexual maturity Fermales were mostly aged 2+; less numerous were age groups 3+ and 4+. The youngest and oldest females were aged 1+ and 10+ 2.0 year
Coregonus lavaretus Female Relative fecundity Mean 45721.2, range 29012-63468 [Other studies: 20000-45000] 46240.0 thousand eggs/kg
Coregonus lavaretus Female Absolute fecundity Mean of 64945.6, range 23650-131418, for female of 39.5-59.2 cm 77534.0 thousand eggs
Coregonus lavaretus Female Onset of oogenesis July (?) ['July']
Coregonus lavaretus Female Intensifying oogenesis activity September-October ['September', 'October']
Coregonus lavaretus Female Maximum GSI value Up to 29-30% [End of November] 29.5 percent
Coregonus lavaretus Female Resting period After spawning, the gonads were basically resting until April and May 3.0 months
Coregonus lavaretus Male Onset of spermatogenesis June ['June']
Coregonus lavaretus Male Main spermatogenesis activity September-October ['September', 'October']
Coregonus lavaretus Male Maximum GSI value Mean of 3% [In the end of October] 3.0 percent
Coregonus lavaretus Male Resting period Below 1%, between February and May 1.0 months
Coregonus lavaretus Spawning conditions Spawning season Late November-early December ['November', 'December']
Coregonus lavaretus Spawning conditions Parity The youngest and oldest females were aged 1+ and 10+ No category