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Fisheries & Fish Farming
The Evolution of Nutrients in Aquafeeds

Aquatic( animals( are( highly( adaptable,( insect meals can be included at high levels of
requiring( around( 40( essential( nutrients( protein replacement, with no adverse e"ects.
that(can(be(sourced(from(various(raw(ma< Freshwater salmon fed insect meal have dem-
terials,(including(marine(ingredients,(ani< onstrated strong growth and robustness,
mal( products,( grains,( and( novel( sources.( potentially bene!ting from a nutrient pro!le
This( adaptability( is( crucial( to( the( indus< similar to their natural prey.
try's(growth(and(will(allow(for(diverse(feed(
formulations. Larger, full commercial scale validation tri-
als are now underway, at a number of custom-
Changing feed formulas can be challeng- er sites. Shrimp and marine !sh have similarly
ing, as new materials must meet stringent shown good feed intake and survival rates.
requirements to maintain growth, feed con-
version rates, robustness, health, and welfare. Single-cell Proteins
Fishmeal, for example, is highly stable and Single-cell proteins, including bacterial
rich in digestible protein and essential ami- meals, fungi, and yeast, are being studied by
no acids, making it an important part of the BioMar's innovation team. Yeast protein has
diet. Successful replacement of !shmeal with shown strong performance at 20% inclusion
plant-based proteins requires careful nutri- with no di"erences observed in growth or
ent supplementation, such as amino acids, to feed conversion. In addition to growth per-
avoid growth and welfare issues. formance, these single-cell protein sources
contain important cell wall components like
Marine oils, another key component, sup- b-glucans, mannan oligosaccharides, lipo-
ply essential omega-3 fatty acids like EPA and polysaccharides, and peptidoglycan. These
DHA, which are critical for maintaining ro- compounds can potentially stimulate im-
bustness and immune health under modern mune responses over long-term feeding,
farming conditions. Replacing these oils with in#uencing immune and physiological path-
alternatives requires careful supplementation ways.
of fat-soluble vitamins. BioMar’s R&D team
has gained extensive knowledge in transition- Advanced techniques such as transcrip-
ing from marine ingredients to processed ani- feed sold containing this novel oil source tomics, metabolomics, microbiota analysis,
mal products, plant-based proteins, and more while prices remained competitive compared and histology have been used to assess these
recently, novel sources. to other DHA and EPA sources. factors. So far, results have shown no unwant-
Microalgae Insect Meals ed upregulation of the immune system, and
single-cell proteins are proving promising for
Single-cell marine algae, have successfully Other novel raw material sources are fol- long-term feeding.
supplemented marine !sh oils, providing es- lowing a larger-scale commercial implemen-
sential DHA and EPA fatty acids. After over 10 tation, trials have shown that insect meals can The ability of fed aquatic species to derive
years of research, BioMar found that algal oils be included at high levels of protein replace- nutrients from a wide range of sources is driv-
can fully replace !sh oil with no negative im- ment, with no adverse e"ects. Freshwater ing a dynamic and diverse raw material bas-
pact on growth, feed conversion, or product salmon fed insect meal have demonstrated ket for aquafeeds. As the aquaculture industry
quality across di"erent species and farming strong growth and robustness, potentially continues to grows the demand for both ex-
stages. bene!ting from a nutrient pro!le similar to isting and novel raw materials will rise. These
new nutrients sources are not only essential
Algal oil has been used in salmon, shrimp, their natural prey.Other novel raw material but are proving to be highly bene!cial in sup-
and marine !sh feeds, achieving commercial sources are following a larger-scale commer- porting the health, welfare and robustness of
scale with over 4 million tonnes of BioMar cial implementation, trials have shown that aquatic species. Circle 31 on enquiry card
Gentle and effective de-lice removal with

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With( a( recent( patent( in( Norway,((Optimar(OptiFlush(sets( (a(
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As is well known, there are several challenges with salmon lice for
the industry. The optimum is to have the lice removed without the
use of chemicals or medicines. It must also be done in a gentle way,
to avoid damage to the !sh. Here we have extensive experience with
the use of thermal treatment.
We continue to work closely with our customers to be able to de-
velop the best methods for de-lice removal. The main focus is !sh
welfare and safe operation, as well as being able to help our custom-
ers achieve higher e$ciency and better quality.
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In close collaboration with our customer Rostein AS, we have de- "We have good experience with the use of Optimar Opti#ush on
veloped Optimar Opti#ush as a stand-alone unit. This can be used several of our vessels. The treatment has become more gentle on the
!sh.
for gentle #ushing with fresh water, in addition to being connected
to other forms of de-lice removal. There have been signi!cant improvements in treatment technol-
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