"The Commonwealth Blue Economy Series aims to support the development of the blue economy in Commonwealth member countries by providing a high-level assessment of the opportunities available for economic diversification and sustainable growth in small island developing states (SIDS). This second volume, Aquaculture, explores the potential for the development of a blue economy mariculture industry, as well as specific enabling conditions that could assist in moving towards economic reality where opportunities exist." - Provided by publisher
Fisheries products are globally traded commodities, which have led to varying degrees of social and economic dependency for producing regions. These dependencies become more evident at times of major demand or supply shocks. Resilience to such shocks is intertwined with, and rooted in, the intra-sectoral structure and governance frameworks. This work analyses two large-scale, capital-intensive and export-oriented seafood sectors: Atlantic salmon and North-east Atlantic mackerel, responded to the environmental, economic and geopolitical shocks accompanying their development, from a UK perspective. Intra-firm controls are identified as elements, which have delivered resilience and strength in these two sectors. This work highlights the central, yet different role of the UK government in increasing their resilience and underlying producing regions. Our work contributes to the broader context of regional development and changing global food demand identifying both domestic and external threats to sustainability. Our approach aims to expand the debate around seafood production from 'food security' to a transdisciplinary analysis, which incorporates wider economic, social, and ecological sustainability aspects.
Aquaculture and marine renewable energy are two expanding sectors of the Blue Economy in Europe. Assessing the long-term environmental impacts in terms of eutrophication and noise is a priority for both the EU Water Framework Directive and the Marine Strategy Framework Directive, and cumulative impacts will be important for the Maritime Spatial Planning under the Integrated Maritime Policy. With the constant expansion of aquaculture production, it is expected that farms might be established further offshore in more remote areas, as high-energy conditions offer an opportunity to generate more power locally using Marine Renewable Energy (MRE) devices. A proposed solution is the co-location of MRE devices and aquaculture systems using Multi-Purpose Platforms (MPPs) comprising offshore wind turbines (OWTs) that will provide energy for farm operations as well as potentially shelter the farm. Disentangling the impacts, conflicts and synergies of MPP elements on the surrounding marine ecosystem is challenging. Here we created a high-resolution spatiotemporal Ecospace model of the West of Scotland, in order to assess impacts of a simple MPP configuration on the surrounding ecosystem and how these impacts can cascade through the food web. The model evaluated the following specific ecosystem responses: (i) top-down control pathways due to distribution changes among top-predators (harbor porpoise, gadoids and seabirds) driven by attraction to the farming sites and/or repulsion/killing due to OWT operations; (ii) bottom-up control pathways due to salmon farm activity providing increasing benthic enrichment predicated by a fish farm particle dispersal model, and sediment nutrient fluxes to the water column by early diagenesis of organic matter (recycled production). Weak responses of the food-web were found for top-down changes, whilst the results showed high sensitivity to increasing changes of bottom-up drivers that cascaded through the food-web from primary producers and detritus to pelagic and benthic consumers, ...
