Tyler et al, 1990


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

Associated characteristics

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