Finfish Breeding and Hatchery Management

1.4.2.d. Spawn behaviour in relation to hydrological and hydrobiological characters

Unit 1 - Fish seed resources and natural breeding of finfishes

2.6. Spawn behaviour in relation to hydrological and hydrobiological characters

Flood level: Flood is the most important character showing a positive correlation with spawn availability.

Current velocity and water depth: Velocity ranging between 0.5-3 km per hour is conducive to spawn collection.

Current direction: A constant direction of current is ideal for spawn collection

Weather: Overcast sky, with or without drizzle, coupled with gentle breeze, is generally ideal for spawn collection. Windy weather is unfavourable. Night collections are higher than day collections.