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- W2038136274 abstract "Two simple methods for mass field cultivation of Gracilaria in Northern Chile were assessed. Thalli fragments were tied either to small rocks or to sand-filled polyethylene tubes to form 120-m2 stands, on a shallow (3–5 m depth) sandy marine bottom with an underlying sandstone substratum. Short-term (6 months) thalli growth and resistance to wave action were evaluated on both stands, and the behaviour of these artificial beds was compared with that of a small undisturbed natural Gracilaria bed (ca. 3 ha) near the experimental area. A pilot artificial bed of 2500 m2 was also established beside the experimental stands, for long-term assessment of the method using sand-filled tubes. Sand displacement and surfacing of the sandstone substratum due to moderate water turbulence caused a continual decline of the natural bed, but had no apparent effect on the artificial beds. Biomass increment in these plantations was 2600–2800% (fresh weight) in a 6-month period. Intense water turbulence at the end of this period had a significantly less destructive effect on the experimental and pilot beds planted with sand-filled tubes. Three years after the establishment of the pilot bed, natural recolonization had increased its area four-fold, in spite of intense and uncontrolled harvesting during the last year. This behaviour was attributed to the generation of a dense underground thalli system in this bed, due to the strong attachment provided by the sand-filled tubes. At this time (July 1985) underground biomass doubled the standing stock. Under the conditions tested in this study, the sand-filled tube method was the most feasible from a technological point of view." @default.
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- W2038136274 date "1986-12-01" @default.
- W2038136274 modified "2023-10-14" @default.
- W2038136274 title "Field assessment of two methods for planting the agar-containing seaweed, Gracilaria, in Northern Chile" @default.
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- W2038136274 doi "https://doi.org/10.1016/0044-8486(86)90076-1" @default.
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