期刊
ECOLOGICAL MODELLING
卷 361, 期 -, 页码 122-134出版社
ELSEVIER
DOI: 10.1016/j.ecolmodel.2017.08.006
关键词
Sea-cage aquaculture; Dispersion model; Benthic impact; Macaronesian region; Atlantic ocean
类别
资金
- Transnational Cooperation Program MAC (PCTMAC) [MAC/3/C136]
Uneaten feeding pellets and fish released faeces cause the most severe impact on the benthos beneath aquaculture offshore sea-cages. A modelling tool, 'MACAROMOD', composed of particulate waste dispersion and benthic response, was developed to predict the environmental disturbances of offshore sea-bream (Sparus aurata), sea-bass (Dicentrarchus labrax) and meagre (Argyrosomus regius) aquaculture in the Macaronesian region (oceanic archipelagos in the north-eastern Atlantic). MACAROMOD was tested at 8 sites (7 farms in the Canary Islands and 1 farm in Madeira), hence covering a high variability in oceanographic and environmental conditions. In general, a low percentage of lost pellets was found (3%), while a high rate of pellets were consumed by wild fishes (97%). Considering all studied sites, significant correlations were shown between observed and predicted solid fluxes (R-2 = 0.89), and also between solid fluxes and the depositional footprint on the benthos, by taken advantage of observed and predicted values of the ecological status AMBI index (R-2 = 0.6966). A flux threshold of 12 kg solids m(-2) yr(-1) was predicted as a boundary from which ecological degradation occurs for the study region. MACAROMOD is therefore a valid tool to improve planning and monitoring Macaronesian aquaculture. (C) 2017 Elsevier B.V. All rights reserved.
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