The Free On-line Aquaculture Dictionary

Photoperiod Control - Sea Bass (Dicentrarchus labrax) spawning control

First manipulated spawning Successive manipulated spawnings

First manipulated spawning - Fish remain on 9 hours light, 15 hours dark regime except for the period detailed in column #1.

Period of 15 hours light / 9 hours dark Spawning spread Mean spawning time
March Start October to Mid-January Mid-November
April Mid-October to Mid-January Start-December
May Start December to Start February Mid- December
June Start December to Start February Mid- December
Jul Start December to Mid February Mid-January
Aug Mid December to Mid February Mid-January
Sep + Oct Mid-February to Start May Mid March
Natural spawning period for above fish Mid January to Start March Start February
 
Note that in successive manipulated spawnings, the spawnings spread and mean spawning times may gradually become later