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Titolo:
Use of underwater playback to reduce the impact of elders on mussel farms
Autore:
Ross, BP; Lien, J; Furness, RW;
Indirizzi:
Mem Univ Newfoundland, Whale Res Grp, Biopsychol Programme, St Johns, NF A1C 5S7, Canada Mem Univ Newfoundland St Johns NF Canada A1C 5S7 ohns, NF A1C 5S7, Canada Mem Univ Newfoundland, Whale Res Grp, Ctr Ocean Sci, St Johns, NF A1C 5S7,Canada Mem Univ Newfoundland St Johns NF Canada A1C 5S7 Johns, NF A1C 5S7,Canada Univ Glasgow, Ornithol Grp, Inst Biomed & Life Sci, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland G12 8QQ ow G12 8QQ, Lanark, Scotland
Titolo Testata:
ICES JOURNAL OF MARINE SCIENCE
fascicolo: 2, volume: 58, anno: 2001,
pagine: 517 - 524
SICI:
1054-3139(200104)58:2<517:UOUPTR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMMON;
Keywords:
aquaculture; Bucephela clangula; deterrent; eider; goldeneye; UPS; Mytilus edulis; pest; Somateria mollissima;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Ross, BP 10 Oaks,Willow Bank, Hawarden CH5 3LP, Clwyd, Wales 10 Oaks,Willow Bank Hawarden Clwyd Wales CH5 3LP P, Clwyd, Wales
Citazione:
B.P. Ross et al., "Use of underwater playback to reduce the impact of elders on mussel farms", ICES J MAR, 58(2), 2001, pp. 517-524

Abstract

One of the most commonly employed methods of reducing damage by diving ducks to mussel stocks on mussel farms in Atlantic Canada and in Scotland is chasing birds by boat. While effective in the short term. the frequency of chases is often restricted by high costs. both in time and furl. Tests in Scotland used underwater recordings of chase-boat engines replayed at regularintervals on continuous loop tapes through on underwater loudspeaker in anattempt to reduce predation pressure by elders on mussel farms. Trials of the underwater playback system (UPS) gave significant reductions in eider numbers of 50-80% while a control trial with the playback of an unassociatednoise gave no reduction in numbers. The mean return time of birds to the farm after chasing by boat also increased significantly. As the presence of workers on mussel farms reduces the number of eiders feeding there, the UPSis a useful deterrent when workers are not present. The long-term habituation of ducks to the system was negligible when workers are absent, providing there is occasionally reinforcement of the deterrent by boat chasing. Potential factors effecting the efficacy or the UPS are discussed. (C) 2001 International Council for the Exploration of the Sea.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 11:07:10