Fuller, J.D. and Scott, A.P. (1976) The reproductive cycle of Coregonus lavaretus (L.) in Loch Lomond, Scotland, in relation to seasonnal changes in plasma cortisol concentration. J. Fish. Biol., pp. 105-117
| Species | Development state | Trait | Primary Data | Secondary Data |
| Coregonus lavaretus | Female | Onset of oogenesis | July | ['July'] |
| Coregonus lavaretus | Female | Intensifying oogenesis activity | Mainly September-October [From July until December there was a progressive increase] | ['July', 'August', 'September', 'October', 'November', 'December'] |
| Coregonus lavaretus | Female | Maximum GSI value | Mean of 16%, up to 21% [In December] | 16.0 percent |
| Coregonus lavaretus | Female | Resting period | After spawning, the gonadosomatic ratio of females fell suddenly and remained low, about 1% of body weight, for 6 months until July[From March to May ovaries contained only primary (pre-vitellogenic) oocytes. Secondary oocytes, wihc chorion and yolkk precursors, appeared in May] | 1.0 months |
| Coregonus lavaretus | Male | Onset of spermatogenesis | July | ['July'] |
| Coregonus lavaretus | Male | Main spermatogenesis activity | August and September | ['August', 'September'] |
| Coregonus lavaretus | Male | Maximum GSI value | Mean of 2%, up to 2.5% [In September until January, with no significant change during this period] | 2.0 percent |
| Coregonus lavaretus | Male | Resting period | It fell gradually from January to a minimum of 0.4% in June and July | 4.0 months |
| Coregonus lavaretus | Spawning conditions | Spawning migration period | During the first 2-3 weeks of January, ripe males migrated to the spawning grounds, where they remained until the end of the spawning period | ['January'] |
| Coregonus lavaretus | Spawning conditions | Spawning season | Spawning takes place during the first 3 weeks of January in Loch Lomond, Scotland | ['January'] |
| Coregonus lavaretus | Spawning conditions | Spawning period duration | Spawning takes place during the first 3 weeks of January in Loch Lomond, Scotland | 3.0 weeks |
| Coregonus lavaretus | Spawning conditions | Spawning substrate | Gravel banks | Lithophils |
| Coregonus lavaretus | Spawning conditions | Parental care | Individual females migrate to the spawning-grounds as ovulation takes place, spawn, and return to deep water | No care |