On the other hand larval survival could also be increased due to
the direct effect of b-glucan on rotifers. Little knowledge is yet
available on the influence of immunomodulators on live feed but bglucan
administration seems to protect Artemia nauplii against
pathogens . It can be speculated that similar effects could be
observed in rotifers and hence heightened performance of turbot
larvae might be due to the feeding of healthier life feed. Furthermore
the influence of b-glucans leaked into the tank water due to
gut passage of the rotifers should not be underestimated as this
might change the microbial community of the larval tanks.