Effect of the Presence of Seagrass and Nutrients on Growth Rates of Farmed Kappaphycus alvarezii and Eucheuma denticulatum (Rhodophyta)
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Western Indian Ocean Marine Science Association
Abstract
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The effects of seagrass cover and nutrients on seaweed cultivation were
examined in tidal pools in Tanzania. The seaweeds Eucheuma denticulatum and
Kappaphycus alvarezii were cultivated from August 2006 - August 2007 in pools
with and without seagrasses, and with and without added nutrients. Growth rates of
fertilised E. denticulatum were significantly lower in the presence of seagrasses (P
<0.05) but there were no significant differences (P >0.05) in the rest of the treatments.
Monthly growth was lowest during the hotter months (December-February) and
heavy rains (March-May), and highest during the cooler months (June-August).
Keywords
Seaweed, Specific growth rate, Substrate, Seagrass, Nutrients