Show simple item record

dc.contributor.authorMtolera, M.S.P.
dc.date.accessioned2006-01-16T06:48:06Z
dc.date.available2006-01-16T06:48:06Z
dc.date.issued2003
dc.identifier.citationWestern Indian Ocean Journal of Marine Science, 2 (2), p. 163–170en
dc.identifier.issn0856-860X
dc.identifier.urihttp://hdl.handle.net/1834/1084
dc.description.abstractThe productivity of two species of red algae, namely Eucheuma denticulatum (Burman) Collins et Harvey and Kappaphycus alvarezii (Doty) Doty was investigated at Paje and Uroa, two sites in Zanzibar differing in seagrass cover. The growth rate (GR) of E. denticulatum in Paje (low seagrass cover) was 20–75% lower than in Uroa (high seagrass cover), depending on season. Growth of K. alvarezii in Paje was compromised by Polysiphonia spp. epiphytism. Manganese, iron, copper and zinc contents of both E. denticulatum and K. alvarezii from Paje were 35–99% lower than in E. denticulatum from Uroa. Culturing of epiphyte-infested or healthy K. alvarezii in seawater fortified with the mentioned minerals improved daily GR by 10–200 %. The effect of Cu, Zn and Mn in K. alvarezii with epiphytic infestation and ‘ice-ice’ was positive only when Provasoli solution was added. The GR of E. denticulatum was virtually unchanged by the addition of minerals. It is suggested that Fe, Zn, and especially Mn may play an important role in conferring resistance to physical stress to the macroalgae, stress which eventually makes them more susceptible to epiphytism and/or a bacterial infection that is responsible for a disease condition known as ‘ice-ice’. Ice-ice describes the texture and colour of the affected thalli. The possible role of seagrasses to the productivity of algae is also discussed.en
dc.format.extent89660 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherWIOMSAen
dc.relation.urihttp://www.wiomsa.orgen
dc.subjectEucheuma denticulatumen
dc.subjectKappaphycus alvarezii
dc.titleEffect of seagrass cover and mineral content on Kappaphycus and Eucheuma productivity in Zanzibaren
dc.typeJournal Contribution
dc.bibliographicCitation.endpage170en
dc.bibliographicCitation.issue2en
dc.bibliographicCitation.stpage163en
dc.bibliographicCitation.titleWestern Indian Ocean Journal of Marine Scienceen
dc.bibliographicCitation.volume2en
dc.description.statusPublisheden
dc.subject.asfaAlgae cultureen
dc.subject.asfaSeagrassen
dc.subject.asfaEpiphytesen
dc.type.refereedNon-Refereeden
dc.type.specifiedArticleen
refterms.dateFOA2021-01-30T18:47:34Z


Files in this item

Thumbnail
Name:
Mtolera.pdf
Size:
87.55Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record