No detailed citation.
|Species||Development state||Trait||Primary Data||Secondary Data|
|Perca fluviatilis||Spawning conditions||Spawning temperature||Rapid 2-week increase in water temeprature from 4-6°C to 10-13°C||5.0 °C|
|Perca fluviatilis||Female||Maximum GSI value||May, 18 +/- 0.6% just before spawning.||18.0 percent|
|Perca fluviatilis||Female||Resting period||After spawning, GSI rapidly decreased to the low values observed during the summer||No data|
|Perca fluviatilis||Female||Onset of oogenesis||GSI increased from the onset of oogenesis at the end of July. The onsey of oogenesis coincided with a steady decline in water temperatures from the end of July, with the oocytes continously developing throughout the winter until a rapid increase in water temperature at the beginning of May, triigerered the spanwing.||['March', 'January', 'May', 'July', 'February']|
|Perca fluviatilis||Female||Intensifying oogenesis activity||March-April||['April', 'March']|
|Perca fluviatilis||Spawning conditions||Spawning season||Perch in both lakes spawned in the middle of May, following a rapid 2-week increase in water temeprature from 4-6°C to 10-13°C||['May']|