Use of models for the environmental risk assessment of veterinary medicines in European aquaculture: current situation and future perspectives

Veterinary Medicinal Products (VMPs) are used in intensive aquaculture production to treat a wide range of bacterial and parasitic infestations. Their release into the environment poses concerns regarding their potential ecotoxicological risks to aquatic ecosystems, which need to be evaluated making use of appropriate Environmental Risk Assessment (ERA) schemes and models. This study presents an overview of the major aquaculture production systems in Europe, the VMPs most commonly used, and the environmental quality standards and regulatory procedures available for their ERA. Furthermore, it describes the state-of-the-art on the development of environmental models capable of assessing the fate, exposure, ecotoxicological effects and risks of VMPs in aquaculture production systems, and discusses their level of development and implementation within European aquaculture. This study shows that the use of environmental models in regulatory ERA is somewhat limited in many European countries. Major efforts have been dedicated to assess the fate and exposure of antiparasitic compounds in salmonid cage systems, particularly in Scotland, while models and scenarios for assessing dispersal of antimicrobials, in general, and antiparasitic compounds in the Mediterranean as well as in Scandinavian regions are less available. On the other hand, the use of ecological models for assessing the effects and risks of VMPs is almost absent. Recommendations are provided to improve the chemical exposure and effect assessments and the ecological realism of the modelling outcomes, paying special attention to the protection goals set for the regulatory ERA of VMPs in Europ

Waste Livelihoods Amongst the Poor – Through the Lens of Bricolage

This paper examines two social enterprises and 25+ informal economy micro-entrepreneurs in Kenya who utilize waste materials to generate income, considered through the conceptual lens of bricolage. Waste materials can all be considered as sources of free or discounted materials that in resource-constrained and poor communities might be leveraged to generate income in the absence of employment. This paper explores three key themes that emerge from the research findings, namely the various strategic dimensions of the cases, the networks and social capital they leverage and how these livelihood models relate to various dimensions of bricolage such as improvisation, making do and the process of ‘fiddling’ or recombining resources. The findings also suggest that differing waste livelihoods have different rates of return, or profitability, and differing input requirements of capital, skills and knowledge. The paper also stresses the role of boundary spanning organizations such as NGOs and hybrid/social enterprises

Influence of design and media amendments on the performance of stormwater biofilters

Biofiltration systems are a promising retrofit option for site-constrained urban areas due to the vertical arrangement of treatment stages that leads to a relatively compact footprint. Existing knowledge about the influence of their design and configuration on hydrological, stormwater pollutant removal and long-term performance is limited and this has been identified as a barrier to their widespread uptake. Long-term simulations of lined and unlined biofiltration systems in four contrasting UK climatic regimes were used to assess the influence of climate, ponding depth, biofilter to drainage area ratio and infiltration rate on hydrological performance. The results showed that local differences in climate have a significant impact on performance and that infiltration rates as low as 0·36 mm/h are not suitable for locations in the UK with high rainfall unless the biofilter to drainage area ratio is greater than 10%. However, with higher infiltration rates (72 mm/h) a biofilter occupying only 3% of the impermeable catchment area would be capable of infiltrating 97% of annual rainfall in central England. Preliminary results of adsorption and column tests to assess the effectiveness of media amendments, specifically zeolite and granular activated carbon, for dissolved copper and phosphate removal are presented in this paper

When risk-based regulation aims low: a strategic framework

This article develops a strategic framework for regulators to employ when choosing intervention strategies for dealing with low risks and reviewing performance, building on the analysis by the same authors in the previous edition of this journal. The framework occupies the operational “middle ground” between risk analysis and formal enforcement action. At its core is a matrix, the Good Regulatory Intervention Design (GRID), which provides a framework to categorize sites or activities on the basis of two factors: the nature of the risk and the nature of the regulatee. Using GRID, regulators can select which intervention tools to use, and determine the overall level of regulatory intensity that should apply. GRID is accompanied by the Good Regulatory Assessment Framework (GRAF) for agencies to use in reviewing their performance and provides a step-by-step process for enabling “double loop learning.” The article also argues that the process of developing such a framework highlighted the extent to which “low risk” and “high risk” regulation are distinct. “Low risk” means “low priority.” Justifying why certain risks should not receive much regulatory attention requires a particular type of engagement, and has a bearing on the regulatory strategies that are adopte

Radiocaesium intake in Great Britain as a consequence of the consumption of wild fungi

In the years following the Chernobyl accident the consumption of wild fungi has been shown to contribute significantly to the radiocaesium intake of humans in several countries. However, in Great Britain, the collection of wild fungi for consumption has generally been thought to be of minor importance and the pathway has not been considered in assessment of radioactivity to humans. The study reported here provides information on contamination levels and consumption rates of wild fungi. To gather the information required, two concurrent surveys were conducted. The first assessed the radiocaesium contamination levels present in commonly eaten fungal species where samples of wild fungi were collected from mainland Great Britain (in collaboration with the British Mycological Society's affiliated Fungus Groups). The second was a survey of consumption habits. The results show that it is not the actual amount of fungi consumed by individuals which determines their radiocaesium intake, but rather the species they select; mycorrhizal species, for example, have significantly greater l37Cs activity concentrations than saprotrophic and parasitic species. It is concluded that the consumption of wild fungi would not currently be expected to appreciably increase the intake of radioactivity of most consumers above that attributable to the normal diet