Sulistyo,1998



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Associated characteristics


Species Development state Trait Primary Data Secondary Data
Perca fluviatilis Female Maximum GSI value 25 % [April prior to spawning] 25.0 percent
Perca fluviatilis Female Oogenesis duration From august to April : 7-8 months 7.5 months
Perca fluviatilis Female Resting period 3-4 3.5 months
Perca fluviatilis Female Onset of oogenesis August-September, then increase gradually until mid-March ['August', 'March', 'September']
Perca fluviatilis Female Intensifying oogenesis activity Beginning of spring, GSI rapidly reached its maximum ['April', 'May', 'June']