Application of polychaetes in (de)coupled integrated aquaculture: production of a high-quality marine resource

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Nederlof, M. A. J. (author)

Application of polychaetes in (de)coupled integrated aquaculture: production of a high-quality marine resource

Article/chapterEnglish2019

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Inter-Research Science Center,2019

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LIBRIS-ID:oai:gup.ub.gu.se/281857
https://gup.ub.gu.se/publication/281857URI
https://doi.org/10.3354/aei00309DOI

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Language:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Capitella sp. and Ophryotrocha craigsmithi received a diet of salmon feces to evaluate their potential to convert fish waste into valuable marine products, e.g. ingredients for fish feed formulation. Production rate and body composition (focusing on fatty acid [FA] profiles) were determined for polychaetes fed fresh, acid-preserved or oven-dried salmon feces to evaluate their application in (de)coupled integrated multi-trophic aquaculture (IMTA) systems. Coupled production refers to direct integration of fish and polychaetes within the same (eco)system, while in decoupled production, units can be spatially or functionally separated. For decoupled production, preservation of fish waste is recommended. Although diets contained relatively low polyunsaturated FA (PUFA) levels (5-9% of total FAs), both species were rich in PUFAs (>30% of total FAs) and contained the essential FAs for fish. Feeding Capitella sp. the acid-preserved diet enriched its FA profile. Accumulation of PUFAs, de novo synthesis and/or transfer via bacterial biomass could have played a role in the upregulation of PUFA content. Amino acid profiles indicated that these polychaetes contained the amino acids essential for fish. Highest growth for both species was observed when fed fresh feces, whereas preserved diets resulted in negative growth rates for O. craigsmithi, suggesting an important role of microbes in polychaete diets. Our results indicate that both species are potential valuable marine products. Given growth rates with different diets, O. craigsmithi seems more suitable for integration in coupled systems, while Capitella sp. is interesting for both coupled and decoupled integrated systems.

Subject headings and genre

NATURVETENSKAP Biologi Zoologi hsv//swe
NATURAL SCIENCES Biological Sciences Zoology hsv//eng
Integrated multi-trophic aquaculture
IMTA
Ophryotrocha craigsmithi
Capitella sp.
Fatty acids
fatty-acid-composition
deposit-feeding polychaete
multi-trophic
aquaculture
capitella sp-i
atlantic salmon
fish farms
whale-fall
organic nitrogen
caloric content
dha/epa ratio
Fisheries
Marine & Freshwater Biology

Added entries (persons, corporate bodies, meetings, titles ...)

Jansen, H. M. (author)
Dahlgren, Thomas G.,1963Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences(Swepub:gu)xdahth (author)
Fang, J. H. (author)
Meier, S. (author)
Strand, O. (author)
Sveier, H. (author)
Verdegem, M. C. J. (author)
Smaal, A. C. (author)
Göteborgs universitetInstitutionen för marina vetenskaper (creator_code:org_t)

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In:Aquaculture Environment Interactions: Inter-Research Science Center11, s. 221-2371869-215X1869-7534

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Zoology

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By the university: University of Gothenburg

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