Comparing the effectiveness of twine and binderseeding in the Laminariales species Alaria esculenta and Saccharina latissima

Philip D. Kerrison, Mairi Innes, Adrian Macleod, Emily McCormick, Peter D. Elbourne, Michele S. Stanley, Adam D. Hughes, Maeve S. Kelly

Research output: Contribution to journalArticle

1 Downloads (Pure)

Abstract

The continuing expansion of seaweed cultivation could assist in ensuring future global food security. The Laminariales species Alaria esculenta and Saccharina latissima are each cultivated for food across their European ranges. The predominant method for cultivating European kelps involves growing juveniles on twine within a hatchery which is then deployed at a farm site. The associated hatchery and deployment cost of this approach are relatively high. A new and innovative methodology—called binder-seeding—can reduce these costs, but, has yet to be validated. We compare the biomass yield and morphology of A. esculenta and S. latissima cultured using either the traditional twine-longline method or binder-seeding onto AlgaeRope and AlgaeRibbon, specially designed textiles. In a controlled growth experiment, A. esculenta had a similar biomass yield on all materials, but fronds were shorter (23 ± 7%) and thinner on the AlgaeRibbon (42 ± 4%) due to a 3–4-fold higher density of developing sporophytes compared to the twine-longline. In contrast, S. latissima gave a 4-fold higher biomass yield on the AlgaeRibbon in June (4.0 kg m−1), but frond morphology was not different between materials, despite a 4-fold higher sporophyte density on the AlgaeRibbon. The stipe length of both species also increased at the higher sporophyte density on the AlgaeRibbon. The AlgaeRope gave an intermediate response or was similar to the twine-longline. These results show that binder-seeding onto the AlgaeRibbon significantly increases the achieved biomass yield in S. latissima. These results can assist cultivators to select the most appropriate method of kelp cultivation depending on morphological/yield requirements of the end use. Further study is needed on the optimisation of the binder-seeding density and its impact on thallus morphology.

Original languageEnglish
Pages (from-to)2173-2181
Number of pages9
JournalJournal of Applied Phycology
Volume32
Issue number4
Early online date3 Mar 2020
DOIs
Publication statusPublished - 1 Aug 2020

Keywords

  • Alaria esculenta
  • Binder
  • Density
  • Morphology
  • Phaeophyceae
  • Saccharina latissima
  • Seeding

Fingerprint Dive into the research topics of 'Comparing the effectiveness of twine and binderseeding in the Laminariales species Alaria esculenta and Saccharina latissima'. Together they form a unique fingerprint.

Cite this