Treasurer, J.W. (1990) The annual reproductive cycle of pike, Esox lucius L., in two Scottish lakes. Journal of Fish Biology, pp. 29-46
| Species | Development state | Trait | Primary Data | Secondary Data |
| Esox lucius | Egg | Oocyte diameter | The range in corrected egg diameter would be 2.14-3.13 in March, unfertilized egg | 2.63 mm |
| Esox lucius | Female | Age at sexual maturity | All females were mature at age 3 and a proportion in both lakes was mature at age 2 [in toher studies, range between from 1/4, 2 and 2/3] | 3.0 year |
| Esox lucius | Female | Length at sexual maturity | The smallest female on first spawning were 28 cm but some females of age 2 < 32 m were observed to be immature. The range in observed length of females at age 3 was 29-36 cm at Kinord and 44-51 cm at Davan [other studie both both sex: range from 30 to 119 cm] | 32.5 cm |
| Esox lucius | Female | Relative fecundity | 11-19 [In Lake Kniord], 10-24 [L. Davan], 9-15 [L. Skene], 27.3-39.3 [Windermere] | 15.0 thousand eggs/kg |
| Esox lucius | Female | Absolute fecundity | 2620-121092 [In Lake Kniord], 2933-104459 [L. Davan], 3877-18501 [L. Skene] | 61856.0 thousand eggs |
| Esox lucius | Female | Onset of oogenesis | August-September | ['August', 'September'] |
| Esox lucius | Female | Intensifying oogenesis activity | Increase regularly during the winter, mainly in January-February | ['January', 'February', 'March'] |
| Esox lucius | Female | Maximum GSI value | Mean 8.98, range 3.81-11.28 [In L. Kinord], 8.32, range 7.42-8.92 [L. Davan], 4.0-8.7 [L. Skene], 15-20 [Windermere], 17 [Slapton Ley] | 7.54 percent |
| Esox lucius | Female | Resting period | April until August | 6.0 months |
| Esox lucius | Male | Age at sexual maturity | Male first spawned at 2 years in both lakes [Other studies: mostly 2, once 1 or 3] | 1.0 years |
| Esox lucius | Male | Length at sexual maturity | Length of 27 cm [Other studies both sex range from 30-119 cm] | 74.5 cm |
| Esox lucius | Male | Onset of spermatogenesis | Late August | ['August'] |
| Esox lucius | Male | Main spermatogenesis activity | September October | ['September', 'October'] |
| Esox lucius | Male | Maximum GSI value | Mean 0.94, range 0.84-1.05 [In L. Kinord], 1.14, range 0.99-1.20 [L. Davan] both in March, 2-4 [Windermere], 2 [Slapton Ley] | 0.95 percent |
| Esox lucius | Male | Resting period | The index declined to 0.04-0.08 after spawning in early April and rose from late August | 3.0 months |
| Esox lucius | Spawning conditions | Spawning season | Occurred between 17 March when all females examined (N=12) were foudn to be gravid and 16 April when all (N=13) were spent | ['March', 'April'] |
| Esox lucius | Spawning conditions | Spawning period duration | Spawning occurred in the first two weeks of April. In any one yeare spawning was usually over 2 weeks maximum | 2.0 weeks |