The performance of spray-irrigated Ulva lactuca (Ulvophyceae, Chlorophyta) as a crop and as a biofilter of fishpond effluents
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Date
2010
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Phycological Society of America
Abstract
The seaweed Ulva lactuca L. was spray cultured by
mariculture effluents in a mattress-like layer, held in
air on slanted boards by plastic netting. Air-agitated
seaweed suspension tanks were the reference.
Growth rate, yield, and ammonia-N removal rate were
11.8% Æ d)1, 171 g fresh weight (fwt) Æ m)2 Æ d)1, and
5 g N Æ m)2 Æ d)1, respectively, by the spray-cultured
U. lactuca, and 16.9% Æ d)1, 283 g fwt Æ m)2 Æ d)1, and
7 g N Æ m)2 Æ d)1, respectively, by the tank U. lactuca.
Biomass protein content was similar in both treatments.
Dissolved oxygen in the fishpond effluent
water was raised by >3 mg Æ L)1 and pH by up to half
a unit, upon passage through both culture systems.
The data suggest that spray-irrigation culture of
U. lactuca in this simple green-mattress-like system
supplies the seaweed all it needs to grow and biofilter
at rates close to those in standard air-agitated tank
culture.
Description
Keywords
biofilter, macroalgae, seaweed culture technology, seaweed production cost, spray culture
Citation
Msuya F.E. and Neori A. 2010. The performance of spray irrigated Ulva lactuca (ULVOPHYCEAE, CHLOROPHYTA) as a crop and as a biofilter of fishpond effluents. Journal of Phycology, 46: 813–817.