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The effects of cultivation deployment- and harvest-timing, location and depth on growth and composition of Saccharina latissima at the Swedish west coast
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
University of Gothenburg, Sweden.
Chalmers University of Technology, Sweden.
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2022 (English)In: Aquaculture, ISSN 0044-8486, E-ISSN 1873-5622, Vol. 559, article id 738443Article in journal (Refereed) Published
Sustainable development
SDG 14: Conserve and sustainably use the oceans, seas and marine resources for sustainable development
Abstract [en]

A study has been conducted to shed light on the effect of cultivation parameters on growth and chemical composition of Saccharina latissima. Longline cultivation took place at two separate locations in the Koster archipelago on the Swedish west coast, centred around three experiments that explored duration of pre-deployment hatchery processes (Exp 1), deployment and harvest time-frames (Exp 2), and cultivation at 2 m vs. 4 m depth (Exp 3). For all experiments the effects of these parameters were evaluated in terms of size/weight of specimens, and for experiments Exp 2 and Exp 3, concentrations of moisture, ash, carbohydrates, proteins, fatty acids, phlorotannins and common heavy metals were determined.

The specific parameters used in this study are likely to vary from site to site, nevertheless trends were observed that resonate in the literature, and these lead to some general recommendations. The weight of harvested kelp blades was higher for the later harvest, earlier deployment and when grown at a shallower depth. Carbohydrates concentration increased with later harvests and at shallower depth. Later harvests also increased the concentration of phlorotannin, while ash and total fatty acids decreased. Protein and fucoidan content was higher for the deeper lines. Growth and chemical composition of the seaweeds showed only minor differences between the two study sites, mostly relating to heavy metal content.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 559, article id 738443
Keywords [en]
Kelp aquaculture optimization, Chemical composition, Seasonal variation, Permutational multivariate analysis, Blue bioeconomy
National Category
Oceanography, Hydrology and Water Resources
Research subject
Environmental Science, Natural Resources Management
Identifiers
URN: urn:nbn:se:lnu:diva-113525DOI: 10.1016/j.aquaculture.2022.738443ISI: 000811613200009Scopus ID: 2-s2.0-85131415143OAI: oai:DiVA.org:lnu-113525DiVA, id: diva2:1664841
Funder
Swedish Research Council Formas, 2013-92Available from: 2022-06-05 Created: 2022-06-05 Last updated: 2022-07-29Bibliographically approved

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Welander, Ulrika

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