Optimising the settlement and hatchery culture of Saccharina latissima (Phaeophyta) by manipulation of growth medium and substrate surface condition

The phaeophyte macroalga Saccharina latissima is gaining economic importance as an aquaculture crop. To decrease costs associated with the hatchery, the time required for meiospores to develop into sporophytes ready for outplanting must be minimised and survivorship maximised. The settlement and juv...

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Bibliographic Details
Published in:Journal of applied phycology 2016-04, Vol.28 (2), p.1181-1191
Main Authors: Kerrison, Philip D, Stanley, Michele S, Kelly, Maeve, MacLeod, Adrian, Black, Kenneth D, Hughes, Adam D
Format: Article
Language:English
Subjects:
Aquaculture
Bacillariophyceae
Biomedical and Life Sciences
culture media
early development
Ecology
Economic importance
Freshwater & Marine Ecology
Germanium
hatcheries
juveniles
Life Sciences
macroalgae
Nutrients
Phaeophyta
Plant Physiology
Plant Sciences
pretreatment
Saccharina latissima
sporophytes
Survival
survival rate
yeast extract
Yeasts
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Summary:The phaeophyte macroalga Saccharina latissima is gaining economic importance as an aquaculture crop. To decrease costs associated with the hatchery, the time required for meiospores to develop into sporophytes ready for outplanting must be minimised and survivorship maximised. The settlement and juvenile development of S. latissima was examined in a series of experimental manipulations. It was determined that (1) Meiospore settlement should be conducted in the dark in nutrient-enriched medium. (2) Continued nutrient enrichment in the hatchery increased growth and survival of the developing sporophytes. (3) It is best to use the diatom inhibitor germanium dioxide only during settlement and the first week of light exposure, rather than continuously or not at all. This treatment leads to the highest survival rate and sporophyte length. (4) Pre-treating the settlement surface with a commercial yeast extract can increase settlement and early development size; however, over-application can be highly detrimental leading to reduced survival, size and patchy growth.
ISSN:0921-8971
1573-5176
DOI:10.1007/s10811-015-0621-6