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- W2107286712 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 326:1-9 (2006) - doi:10.3354/meps326001 Impact of fish farms on maerl beds in strongly tidal areas Jason Hall-Spencer1,*, Nicola White2, Ewan Gillespie3, Katie Gillham4, Andy Foggo1 1Plymouth Marine Institute, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK 2Haskoning UL Ltd, Elizabeth House, Emperor Way, Exeter EX1 3QS, UK 3Scottish Environment Protection Agency, Dingwall IV7 9X8, UK 4Scottish Natural Heritage, Westercraigs, Inverness IV3 8NW, UK *Email: jhall-spencer@plymouth.ac.uk ABSTRACT: In Scotland, Atlantic salmon Salmo salar cages are being moved out of areas with slow water movements, to disperse wastes and reduce impacts on benthic communities. This first study of the effects of fish farms on maerl beds (red algal coralline gravels of high conservation importance) demonstrated major impacts on the benthos, even in strongly tidal areas. SCUBA surveys of 3 fish farms located over maerl revealed a build-up of waste organic matter and 10 to 100-fold higher abundances of scavenging fauna (e.g. Necora puber, Pagurus bernhardus) than on 6 reference maerl beds. Visible waste was noted up to 100 m from cage edges, and all 3 farms caused significant reductions in live maerl cover, upon which this habitat depends. Near-cage infaunal samples showed significant reductions in biodiversity, with small Crustacea (ostracods, isopods, tanaids and cumaceans) being particularly impoverished in the vicinity of cages, and significant increases in the abundance of species tolerant of organic enrichment (e.g. Capitella spp. complex, Ophryotrocha hartmanni). Relocation of fish farms to areas with strong currents is unlikely to prevent detrimental effects to the structure and organisation of the benthos, and fallowing (whereby sites are left unstocked for a period of time to allow benthic recovery) is inadvisable where slow-growing biogenic habitats such as maerl are concerned, as this may expand the area impacted. KEY WORDS: Salmon farming · Maerl · Organic enrichment · Benthos · Scotland Full text in pdf format NextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 326. Online publication date: November 17, 2006 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2006 Inter-Research." @default.
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- W2107286712 title "Impact of fish farms on maerl beds in strongly tidal areas" @default.
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