The development of a sustainability assessment indicator and its response to management changes as derived from salmon lice dispersal modelling
| Autor: | Ingrid Askeland Johnsen, Samantha Bui, Mats Huserbråten, Mari Skuggedal Myksvoll, Anne Dagrun Sandvik, Ørjan Karlsen, Bjørn Ådlandsvik |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Ecology 010604 marine biology & hydrobiology 04 agricultural and veterinary sciences Aquatic Science Biology Oceanography 01 natural sciences parasitic diseases Sustainability 040102 fisheries 0401 agriculture forestry and fisheries Biological dispersal skin and connective tissue diseases Ecology Evolution Behavior and Systematics |
| Zdroj: | ICES Journal of Marine Science |
| ISSN: | 1095-9289 1054-3139 |
| DOI: | 10.1093/icesjms/fsab077 |
| Popis: | Aquaculture is providing an increasingly larger proportion of the world’s protein for human consumption; however, its environmental impact is a bottleneck for sustainable expansion. In Norway, the government has enacted a framework where salmon lice-induced mortality in wild salmonid populations is used for assessing the environmental sustainability in production zones. Direct measurements of the level of lice-induced mortality on wild salmonids are difficult to acquire, thus comprehensive sustainability assessments are based on a set of evidence-based proxies. One such proxy is the infestation pressure from a bio-hydrodynamic model, from which we develop an index that summarize the sustainability of aquaculture in terms of lice infestation. This index is based on the proportion of areas with elevated lice loads, and is a novel approach used to investigate how sustainability could be achieved through scenario testing of different management strategies. The analyses identified a mismatch between legal and sustainable lice levels, but also a beneficial effect of reducing lice levels on farms. This study’s approach demonstrated how bio-hydrodynamic models might be used to assess sustainability and to predict the necessary reduction of lice larvae from farms to classify the entire Norwegian aquaculture industry as environmentally sustainable. |
| Databáze: | OpenAIRE |
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