Effects of water flow velocity and fish culture on net biofouling in fish cages

Madin, J. and Chong, V.C. and Hartstein, N.D. (2010) Effects of water flow velocity and fish culture on net biofouling in fish cages. Aquaculture Research, 41 (10). e602-e617.

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The effects of water flow, fish feed and cage position on net biofouling was examined in a floating cage fish farm. Fouling of 16 mm mesh net panels suspended inside and outside net cages and exposed to different treatments were monitored weekly until net apertures were completely occluded by the fouling organisms (8 weeks). Results indicate a dramatic reduction in water flow velocity throughout the fish farm due to the cage units themselves and net biofouling. The reduced water flow (< 10 cm s-1) inside net cages promoted rapid net biofouling, while rapid water flow outside the net cages (> 25 cm s-1) kept the net fouling organisms at bay. Although fish rearing in net cages with inputs of commercial pellet feed increased sessile biofouling (222% higher than outside the net cages) and non-sessile biofouling (570% higher), the type of fish feed used did not significantly affect biofouling development. The study recommends that the geometry of serially arranged net cages, as commonly deployed in tropical tidal estuaries, be reconfigured to improve flow through in order to minimize the impact of fouling.

Item Type: Article
Uncontrolled Keywords: Net biofouling; water flow velocity; fish feed; floating fish-cages; tropical estuary; aquaculture Malaysia
Subjects: Q Science > Q Science (General)
Depositing User: Mr Faizal 2
Date Deposited: 23 Jan 2015 01:18
Last Modified: 23 Jan 2015 01:18
URI: http://eprints.um.edu.my/id/eprint/12362

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