Integrating filamentous 'green tide' algae into tropical pond-based aquaculture

P H de Paula Silva; S McBride; R de Nys; Nicholas A Paul

doi:10.1016/j.aquaculture.2008.07.035

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Integrating filamentous 'green tide' algae into tropical pond-based aquaculture

Journal article

Peer reviewed

Integrating filamentous 'green tide' algae into tropical pond-based aquaculture

P H de Paula Silva, S McBride, R de Nys and Nicholas A Paul

Aquaculture, Vol.284(1-4), pp.74-80

2008

DOI: https://doi.org/10.1016/j.aquaculture.2008.07.035

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Abstract

seaweed

bioremediation

integrated aquaculture

Great Barrier Reef

effluent regulation

cladophora

chaetomorpha

Green tide' algae bloom in eutrophic environments with fast growth rates and efficient nutrient uptake. These same characteristics are sought after for algae in integrated aquaculture systems. We examined the effect of two key variables, salinity and total ammonia nitrogen (TAN), on the growth of three filamentous 'green tide' algae, Cladophora coelothrix, Chaetomorpha indica and Ulva sp. Survival and growth were first determined across the extremes of salinity in ponds (0 to 45‰). Subsequently, the interactive effects of salinity (15, 36 and 45‰) and TAN (0-700 μmol l- 1) were quantified using a factorial design. All species have a broad tolerance to salinity (ranging from 5 to 45‰) with each having a different optimum for growth (C. coelothrix 30‰, C. indica 20‰ and Ulva sp. 15‰). A significant interaction (salinity * TAN * species) further demonstrated that responses vary between algae. C. indica and Ulva sp. have their highest growth rates of ~ 14% day- 1 and ~ 25% day- 1 respectively at higher TAN levels (> 70 μmol l- 1) but at different salinities. Growth of C. coelothrix was optimum at lower TAN levels (35 μmol l- 1) and 36‰, but surprisingly was inhibited at the highest TAN. C. coelothrix and C. indica were also cultured in an operational bioremediation pond. High growth rates of C. coelothrix were maintained in situ (~ 6% day- 1), while C. indica performed poorly. Finally, TAN removal rates were calculated using natural densities and in situ growth rates demonstrating that 'green tide' algae have broad application across the environmental variables that characterize tropical pond-based aquaculture. Crown Copyright © 2008.

Details

Title: Integrating filamentous 'green tide' algae into tropical pond-based aquaculture
Authors: P H de Paula Silva (Author) - James Cook University
S McBride (Author) - Good Fortune Bay Fisheries Ltd
R de Nys (Author) - James Cook University
Nicholas A Paul (Author) - James Cook University
Publication details: Aquaculture, Vol.284(1-4), pp.74-80
Publisher: Elsevier BV
Date published: 2008
DOI: 10.1016/j.aquaculture.2008.07.035
ISSN: 0044-8486
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99450556202621
Output Type: Journal article

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