Tyler, C.R. and Sumpter, J.P. and Witthames, P.R. (1990) The dynamycs of oocyte growth during vitellogenesis in the rainbow trout (Oncorhynchus mykiss). Biology of reproduction, pp. 202-209
Species | Development state | Trait | Primary Data | Secondary Data |
Oncorhynchus mykiss | Egg | Oocyte diameter | 5.4 at ovualtion | 5.4 mm |
Oncorhynchus mykiss | Female | Relative fecundity | At ovulation 2.629 ± 231 | 2.63 thousand eggs/kg |
Oncorhynchus mykiss | Female | Absolute fecundity | 2000-3000 | 2500.0 thousand eggs |
Oncorhynchus mykiss | Female | Oocyte development | Group-synchronous spawner | Group-synchronous |
Oncorhynchus mykiss | Female | Onset of oogenesis | September | ['September'] |
Oncorhynchus mykiss | Female | Intensifying oogenesis activity | Based on GSI graph, mainly in November, but a slight increase then in February [The rate of increase in oocyte size was maximal between September and late November], with an ovulation in February | ['February', 'September', 'November'] |
Oncorhynchus mykiss | Female | Maximum GSI value | 20% just prior to ovulation in February | 20.0 percent |