Seasonal variation in growth rates and carrageenan properties of Kappaphycus alvarezii and Eucheuma denticulatum cultivated with and without additionnutrients, in Uroa, Zanzibar, Tanzaniaal

Simple item page
dc.contributor.authorMsuya, Flower E.
dc.contributor.authorKyewalyanga, Margareth S.
dc.contributor.authorBleicher-Llhonneur, Genevieve
dc.contributor.authorLampin, Tatiana
dc.contributor.authorLhonneur, Jean-Pierre
dc.contributor.authorMazoyer, Jacques
dc.contributor.authorCritchley, Alan T.
dc.date.accessioned2016-02-18T17:04:17Z
dc.date.available2016-02-18T17:04:17Z
dc.date.issued2012
dc.descriptionONLINE ISSN 1821-7249en_US
dc.description.abstractKappaphycus alvarezii and Eucheuma denticulatum were cultivated under two treatments: with & without additional nutrients in Uroa, Zanzibar. The seaweeds were cultivated for 8 weeks (total of 15 weeks) in contrast to the 4-6 weeks normally used by farmers. Water column nutrients were 8-17μM total ammonia nitrogen & 2-38 μM soluble reactive phosphate. There were no significant differences in specific growth rates of fertilised & unfertilised seaweeds (P>0.05). However, during heavy rains & high surface seawater temperatures there were significant differences between the two treatments for both species (P<0.05). Whereas seaweed growth rates seemed to be affected by protracted periods of rain and a hot season of 31 0C maximum, fertilised K. alvarezii was more affected by the hot season than the unfertilised plant. For short rains and cooler months (27 0C maximum) both treatments showed similar rates. No significant differences (P>0.05) were found in carrageenan yield, dry matter, iota carrageenan percentage, and viscosity between fertilised and unfertilised treatments. Seasonal variations showed lower carrageenan yield & dry matter during heavy rains and higher values at the end of rainy season. Seaweed farmers in Tanzania could use a lower stocking density for higher seaweed biomass production & cultivate seaweeds for longer periods to satisfy customers in the carrageenan industry if so desired.en_US
dc.identifier.citationMsuya F.E., Kyewalyanga M.S., Bleicher-Lhonneur G., Lampin T., Lhonneur J., Mazoyer J., and Critchley A.T. 2012. Seasonal variation in growth rates and carrageenan properties of Kappaphycus alvarezii and Eucheuma denticulatum cultivated with and without additional nutrients, in Uroa, Zanzibar, Tanzania. Tanzania Journal of Natural and Applied Sciences, 3: 524-535.en_US
dc.identifier.issn1821-7249
dc.identifier.urihttp://hdl.handle.net/123456789/445
dc.language.isoenen_US
dc.publisherTanzania Journal of Natural and Applied Sciencesen_US
dc.subjectSeaweed growthen_US
dc.subjectcarrageenan propertiesen_US
dc.subjectnutrientsen_US
dc.subjectEucheumaen_US
dc.subjectKappaphycusen_US
dc.titleSeasonal variation in growth rates and carrageenan properties of Kappaphycus alvarezii and Eucheuma denticulatum cultivated with and without additionnutrients, in Uroa, Zanzibar, Tanzaniaalen_US
dc.typeJournal Articleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Msuya et al 2012.pdf
Size:
632.99 KB
Format:
Adobe Portable Document Format
Description:
Main article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Institute of Marine Sciences