scholarly journals Conditions for staggering and delaying outplantings of the kelps Saccharina latissima and Alaria marginata for mariculture

2021 ◽  
Author(s):  
Ann E. T. Raymond ◽  
Michael S. Stekoll
Keyword(s):  
Saccharina Latissima ◽  
Alaria Marginata

Drag force and reconfiguration of cultivated Saccharina latissima in current

2021 ◽  
pp. 102169
Author(s):  
Jiarui Lei ◽  
Dixia Fan ◽  
Andrea Angera ◽  
Yuming Liu ◽  
Heidi Nepf
Keyword(s):  
Drag Force ◽  
Saccharina Latissima

scholarly journals Saccharina latissima Cultivated in Northern Norway: Reduction of Potentially Toxic Elements during Processing in Relation to Cultivation Depth

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1290
Author(s):  
Marthe Jordbrekk Blikra ◽  
Xinxin Wang ◽  
Philip James ◽  
Dagbjørn Skipnes
Keyword(s):  
Toxic Elements ◽  
Iodine Content ◽  
Relative Effect ◽  
Potentially Toxic Elements ◽  
Saccharina Latissima ◽  
Processing Strategies ◽  
Raw Sugar ◽  
The Difference ◽  
Cadmium Lead ◽  
Product Segmentation

There is an increasing interest in the use of Saccharina latissima (sugar kelp) as food, but the high iodine content in raw sugar kelp limits the daily recommended intake to relatively low levels. Processing strategies for iodine reduction are therefore needed. Boiling may reduce the iodine content effectively, but not predictably, since reductions from 38–94% have been reported. Thus, more information on which factors affect the reduction of iodine are needed. In this paper, sugar kelp cultivated at different depths were rinsed and boiled, to assess the effect of cultivation depth on the removal efficacy of potentially toxic elements (PTEs), especially iodine, cadmium, and arsenic, during processing. Raw kelp cultivated at 9 m contained significantly more iodine than kelp cultivated at 1 m, but the difference disappeared after processing. Furthermore, the content of cadmium and arsenic was not significantly affected by cultivation depth. The average reduction during rinsing and boiling was 85% for iodine and 43% for arsenic, but no significant amount of cadmium, lead, or mercury was removed. Cultivation depths determined the relative effect of processing on the iodine content, with a higher reduction for kelp cultivated at 9 m (87%) compared to 1 m (82%). When not taken into consideration, cultivation depth could mask small reductions in iodine content during rinsing or washing. Furthermore, since the final content of PTEs was not dependent on the cultivation depth, the type and extent of processing determines whether cultivation depth should be considered as a factor in cultivation infrastructure design and implementation, or alternatively, in product segmentation.

scholarly journals Environmental impact of kelp (Saccharina latissima) aquaculture

2020 ◽  
Vol 155 ◽  
pp. 110962 ◽  
Author(s):  
Wouter Visch ◽  
Mikhail Kononets ◽  
Per O.J. Hall ◽  
Göran M. Nylund ◽  
Henrik Pavia
Keyword(s):  
Environmental Impact ◽  
Saccharina Latissima

scholarly journals Preserving Porphyra umbilicalis and Saccharina latissima as Silages for Ruminant Feeding

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1957
Author(s):  
Margarita Novoa-Garrido ◽  
Carlos Navarro Marcos ◽  
María Dolores Carro Travieso ◽  
Eduarda Molina Alcaide ◽  
Mogens Larsen ◽  
...  
Keyword(s):  
Dry Matter ◽  
Nutritional Value ◽  
Volatile Fatty Acids ◽  
Gas Production ◽  
Saccharina Latissima ◽  
Porphyra Umbilicalis ◽  
In Vitro Gas Production ◽  
Ruminal Degradability ◽  
Kinetics Of

The study analyzed the characteristics, chemical composition, and in vitro gas production kinetics of Porphyra umbilicalis and Saccharina latissima silages. Each seaweed was ensiled in vacuum bags (three bags/silage) following a 2 × 3 factorial design, with two pre-treatments (unwilted or pre-wilted) and three silage types: unwashed seaweed ensiled without additive; seaweed washed and ensiled without additive; and seaweed washed and ensiled with 4 g of formic acid (FAC) per kg seaweed. Silages were kept for 3 months in darkness at 20 °C. Pre-wilting prevented (p < 0.001) effluent formation and reduced (p ≤ 0.038) the production of NH3-N and volatile fatty acids for both seaweeds. Both pre-wilting and washing increased (p < 0.05) the ruminal degradability of P. umbilicalis silages but not of S. latissima silages. The pH of the FAC-treated silages was below 4.0, but ranged from 4.54 to 6.23 in non FAC-treated silages. DL-lactate concentrations were low (≤23.0 g/kg dry matter) and acetate was the predominant fermentation product, indicating a non-lactic fermentation. The estimated ruminal degradability of the P. umbilicalis and S. latissima silages was as average, 59.9 and 86.1% of that for high-quality rye-grass silages, respectively, indicating a medium-low nutritional value of these seaweed silages for ruminants.

Seasonal- and depth-dependent growth of cultivated kelp (Saccharina latissima) in close proximity to salmon (Salmo salar) aquaculture in Norway

Aquaculture ◽  
2013 ◽  
Vol 414-415 ◽  
pp. 191-201 ◽  
Author(s):  
Aleksander Handå ◽  
Silje Forbord ◽  
Xinxin Wang ◽  
Ole Jacob Broch ◽  
Stine Wiborg Dahle ◽  
...  
Keyword(s):  
Salmo Salar ◽  
Saccharina Latissima ◽  
Close Proximity ◽  
Dependent Growth

scholarly journals Identification of Phlorotannins in the Brown Algae, Saccharina latissima and Ascophyllum nodosum by Ultra-High-Performance Liquid Chromatography Coupled to High-Resolution Tandem Mass Spectrometry

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 43
Author(s):  
Roya R. R. Sardari ◽  
Jens Prothmann ◽  
Olavur Gregersen ◽  
Charlotta Turner ◽  
Eva Nordberg Karlsson
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Resolution ◽  
Tandem Mass Spectrometry ◽  
High Performance ◽  
Ascophyllum Nodosum ◽  
Saccharina Latissima ◽  
Total Phenolic ◽  
Tandem Mass

Phlorotannins are bioactive polyphenols in brown macroalgae that make these algae interesting as healthy food. Specific phlorotannins are, however, seldom identified, and extracts from different species are often only analysed for total phenolic content (TPC). In this study, our focus was to identify phlorotannin molecules from Saccharina latissima and Ascophyllum nodosum (a species rich in these compounds) using ultra-high-performance liquid chromatography coupled to high-resolution tandem mass spectrometry (UHPLC-HRMS2). Water and ethanol (30 and 80% v/v) were used at solid:liquid ratios, extraction times and temperatures, proposed to result in high TPC in extracts from other species. The S. latissima extracts, however, did not allow phlorotannin detection by either UHPLC-UV/Vis or UHPLC-HRMS2, despite a TPC response by the Folin–Ciocalteu assay, pinpointing a problem with interference by non-phenolic compounds. Purification by solid phase extraction (SPE) led to purer, more concentrated fractions and identification of four phlorotannin species in A. nodosum and one in S. latissima by UHPLC-HRMS2, using extracts in ethanol 80% v/v at a solid:liquid ratio of 1:10 for 20 h at 25 °C with an added 10 h at 65 °C incubation of remaining solids. The phlorotannin with the formula C12H10O7 (corresponding to bifuhalol) is the first identified in S. latissima.

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