Albert, A. and Vetemaa, M. and Saat, T. (2004) Effects of salinity in the development of Peipsi whitefish Coregonus lavaretus maraenoides Poljakow embryos. Annales Zoologici Fennici, pp. 85-88
Species | Development state | Trait | Primary Data | Secondary Data |
Coregonus lavaretus | Egg | Temperature for incubation | Water temperature was 4°C in November-December, and then it increased gradually up to 6°C in late March-April. These temepratures are in the range of optimal temperatures for C. lavaretus embryos. | 4.0 °C |
Coregonus lavaretus | Egg | Degree-days for incubation | Hatching began at highest salinity (6.2 ppt) at 220 degree-days after fertilisation. Time of hatching at 50% of larvae decreased from 616 degree-days at 0.2 ppt to 470 degree-days at 4.8 ppt and 239 degree-days at 6.2 ppt […] Percentage of abnormal free embryos was ~ 20 at 0.2-2.5 ppt but increased rapidly at higher salinities | 1.35 °C * day |
Coregonus lavaretus | Larvae | Initial larval size | Peipsi whitefish has TL at hatching of 10.8-12.4 mm. In the present study the maximum TL (> 11 mm) was observed at 1.9-3.5 ppt. At the salinity with the highest embryonic survival (0.5 ppt) average TL was 10.6 mm | 11.6 mm |