Ulva reticulata and Gracilaria crassa: Macroalgae That Can Biofilter Effluent from Tidal Fishponds in Tanzania

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dc.creatorMsuya, Flower E.
dc.creatorNeori, Amir
dc.date2016-02-16T15:24:11Z
dc.date2016-02-16T15:24:11Z
dc.date2002
dc.date.accessioned2018-04-18T11:12:25Z
dc.date.available2018-04-18T11:12:25Z
dc.descriptionMacroalgae (seaweed) can be cultured effectively for the production of useful algal biomass and removal of nutrients from fishpond effluents. A land-based, tide/gravity-driven flow-through, fish-macroalgae integrated system was studied at Makoba Bay, Zanzibar, Tanzania, during May–October, 2000. Rectangular cages made of 1-inch mesh netting were constructed in channels that received the outflows of the fishponds. Four species of macroalgae were planted in the cages and compared for their usefulness as biofilters. Gracilaria crassa and Ulva reticulata grew at average rates of 1.5 and 1.2 %, respectively. Both species removed nitrogen as seaweed protein at rates of up to 0.4 g N/m2/d. The algal biomass produced was of good quality with protein dry weight contents of 13% for G. crassa and 26 % for U. reticulata. The biofilters also raised the pH values of the fishpond effluents and oxygenated the water. In contrast to Ulva and Gracilaria, species of Eucheuma and Chaetomorpha performed poorly in the fishpond effluents.
dc.identifierMsuya F.E. and Neori A. 2002. Ulva reticulata and Gracilaria crassa: macroalgae that can biofilter effluent from tidal fishponds in Tanzania. Western Indian Ocean Journal of Marine Science, 1: 117–12.
dc.identifierhttp://hdl.handle.net/123456789/408
dc.identifier.urihttp://hdl.handle.net/123456789/9196
dc.languageen
dc.publisherWestern Indian Ocean Marine Science Association
dc.subjectmacroalgal biofilters
dc.subjectseaweed
dc.subjectyield
dc.subjectprotein content
dc.subjectintegrated mariculture
dc.subjectnutrients
dc.subjecteutrophication
dc.subjectsustainable development
dc.titleUlva reticulata and Gracilaria crassa: Macroalgae That Can Biofilter Effluent from Tidal Fishponds in Tanzania
dc.typeJournal Article, Peer Reviewed

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