end of the experiment. Fish fed diets supplemented with 0.1% Astragalus extract and 75 mg/kg boron showed enhanced phagocytic
activity for the first three weeks. Feeding the fish with mixtures
supplemented with Lonicera extract, Lonicera extract and boron or
both herbs and boron had a weaker effect. A significant increase was
measured on the second, second and third, and first week, respectively
for these combinations