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Growth of the carrageenan-producing tropical red seaweed Hypnea musciformis in surface water, 870m deep water, effluent from a clam mariculture system, and in deep water enriched with artificial fertilizers or domestic sewage Haines, K.C. (1976). Growth of the carrageenan-producing tropical red seaweed Hypnea musciformis in surface water, 870m deep water, effluent from a clam mariculture system, and in deep water enriched with artificial fertilizers or domestic sewage, in: Persoone, G. et al. (Ed.) Proceedings of the 10th European Symposium on Marine Biology, Ostend, Belgium, Sept. 17-23, 1975: 1. Research in mariculture at laboratory- and pilot scale. pp. 207-220 In: Persoone, G.; Jaspers, E. (Ed.) (1976). Proceedings of the 10th European Symposium on Marine Biology, Ostend, Belgium, Sept. 17-23, 1975: 1. Research in mariculture at laboratory- and pilot scale. European Marine Biology Symposia, 10(1). IZWO: Wetteren. ISBN 90-6281-001-2. 620 pp. In: European Marine Biology Symposia.

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Beschikbaar in	Auteur
VLIZ: Non-open access 330420 [ aanvragen ]
Documenttype: Congresbijdrage

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Trefwoord

Marien/Kust

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Auteur		Top
Haines, K.C.

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Abstract

Growth of Hypnea musciformis (Wulfen) Lamaroux in the effluent from an artificial upwelling mariculture system on St. Croix, U.S. Virgin Islands, in which 870 m deep water is used to grow planktonic algae which are then fed to bivalve shellfish, was about five times faster than growth in unaltered deep water, and about three times faster than in surface seawater. Growth was positively correlated with ammonia concentration in the water supplied to the seaweed. but there was no correlation with nitrate or phosphate concentration. The growth stimulation by the effluent from the shellfish mariculture system could be achieved by enriching deep water with ammonia plus a chelated iron-trace metals-vitamins mix, but could not be achieved by enriching the deep water with ammonia alone or with the chelated iron-trace metals-vitamins mix alone. Increasing the ammonia supply, while keeping the chelated iron-trace metals-vitamins mix enrichment constant, produced an increased growth rate. Enrichment of deep water with 4% primary-treated sewage and 35% secondary-treated sewage also increased growth of H. musciformis relative to its growth in deep water alone. Carbon, nitrogen, and carrageenan contents of the seaweed grown under various nutritional conditions are presented.

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