Prospects for the use of brown algae as a natural adaptogen

One of the most important trends in the development  of  modern  agriculture  is  the policy of replacing or completely replacing antibiotics and chemical antimicrobial agents in animal diets.An  alternative  to  feed  antibiotics  is  a complex of feed additives - probiotics, prebiotics,  toxin  sorbents,  phytobiotics.  Only  a comprehensive  program  of  their  use  can effectively  replace  feed  antibiotics  in  the diets of farm animals and poultry. It is relevant  and  promising  to  use  components  of plant  origin  as  feed  additives  that  can  increase  the  productivity  of  livestock,  stimuate reproduction, and improve the consumer properties of products.The  purpose  of  the  research  was  to search for biologically active substances  in brown algae, which are potential stimulators of  nonspecific  resistance  in  poultry.  The objects  of  research  were  fresh  algae  Fucus vesiculosus  and  Ascophyllum  nodosum, collected  by  hand  from  rocky  areas  in  the coastal zone of the White Sea (near the village of Nyukhcha, Kondostrov Island, Onega Bay) during low tide from August to October 2023. During the research, the biomass of algae Fucus vesiculosus (F. vesiculosus) and  Ascophyllum  nodosum  (A.  nodosum) was studied. In these biomassages, the content  of  crude  protein,  lipids,  moisture,  as well  as  fucoidan  polysaccharides  and  alginates in the samples was studied.Thus,  in  the  course of the research, fucoidan  polysaccharide  was  identified  in brown algae of the White Sea (fucus vesiculosa  and  ascophyllum),  which  is  a  natural stimulator  of  a  nonspecific  immune  response,  contributing  to  an  increase  in  the number of bifidobacteria in the intestines of animals.  The  presence  of  fucoidan  in  high concentrations makes brown algae a promising  basis  for  the  production  of  veterinary drugs and feed additives.