It has been the practice to feed fry in light conditions because the studies show fry grow best when they receive lots of light. But research with cod larva show it too is reliant on light to eat and grow. However, no investigations have been carried out on whether the same effect is achieved with cod fry.
Senior Scientist Sten Siikavuopio at Nofima (formerly Fiskeriforskning) carried out experiments with three groups of juvenile cod to find out the exact report of the juvenile cod’s eating and growing when fed in light and dark conditions respectively. The result shows that the juvenile cod fed in the dark grows a little larger than the other cod fed in light or light & dark.
Siikavuopio informed that the findings open the way for more flexible methods for feeding juvenile cod. But the scientist has no knowledge how the cod eat in the dark. It is now important to note the food changes in the transition from cod larvae to juvenile cod.
