http://hdl.handle.net/1893/1299 Electronic copies of Aquaculture research reports. 2026-10-02T23:37:10Z http://hdl.handle.net/1893/37537 Title: Climate change impacts on marine aquaculture relevant to the UK Author(s): Murray, Alexander G; Falconer, Lynne; Kennerley, Adam; Veenhof, Reina J Abstract: First paragraph: KEY FACTS What is happening ● In the UK, there have been no major changes to the types or locations of species farmed due to climate change. ● At salmon farms, a link between milder winter temperatures, disease and increased fish mortality has been identified and marine heatwaves can contribute to mass mortality events. ● In Scotland, some shellfish areas have experienced poor spat settlement and mortality, but the link to climate change is not fully established. 2025-02-17T00:00:00Z http://hdl.handle.net/1893/34723 Title: Climate change impacts on marine aquaculture relevant to the UK and Ireland Author(s): Murray, Alexander; Falconer, Lynne; Clarke, Dave; Kennerley, Adam Abstract: What is happening ● In the UK, there have been no major changes to the types or locations of species farmed due to climate change. ● At salmon farms, a strong link between milder winter temperatures, disease and increased fish mortality has been identified. ● In Scotland, some shellfish areas have experienced poor spat settlement and mortality, but the link to climate change is not fully established. What could happen ● Temperatures are expected to remain suitable for salmon growth until the end of the century, when aquaculture in Northern Ireland and the southwest of Scotland may experience seasonal declines due to warming. ● Ocean acidification may reduce shellfish spat settlement, although it is unlikely to affect finfish farming. ● Warming conditions will lead to a rise in outbreaks including sea lice, fish diseases and shellfish pathogens, with subsequent increased mortality. ● The risk of mortality due to more frequent and intense heatwave events will increase in the future, highlighting the need for adaptive management. ● Offshore facilities may be more exposed to structural damage due to potential changes in storm events, with an increased risk of farmed species escaping. 2022-11-01T00:00:00Z http://hdl.handle.net/1893/33083 Title: Workshop on the Inclusion of Discard Survival in Stock Assessments (WKSURVIVE) Author(s): ICES, Abstract: The introduction of high survivability exemptions from the EU landing obligation has raised questions on how they relate to ICES stock advice and the management of quotas (TACs). Where discard rates are high, and survival rates are limited, substantial quantities of dead discards are generated. On the other hand, high survival rates may result in limited impacts of discarding despite high discard rates. Therefore, to achieve agreed levels of fishing mortality, dead discards should be accounted for in the stock assessment and the advice derived from it. The inclusion of discard survival in stock assessments has wider application also since it can improve estimates of fishing mortality and in turn enhance scientific advice on fishing opportunities. This ICES workshop, WKSURVIVE, was established to explore and progress the inclusion of discard survival in stock assessments. Participants consisted of researchers with expertise in conducting discard survival experiments and researchers with expertise in stock assessments. The workshop successfully reviewed the approaches taken in existing ICES stocks assessments to integrate discard survival estimates. Three cases were identified: plaice (Pleuronectes platessa) in Division 7.a (Irish Sea), several Norway lobster (Nephrops norvegicus) Functional Units (FUs), and sea bass (Dicentrarchus labrax) in divisions 4.b, 4.c, 7.a, and 7.d–h (although only for recreational catches in this last case). These cases are reviewed and described in the report. WKSURVIVE identified case study ICES stock assessments for which there is management interest to include discard survival, and for each one mapped to it relevant and robust discard survival evidence. Based on the type of assessment and the associated discard survival evidence, the group agreed on recommendations on the inclusion of discard survival for each stock assessment. A table including the stock assessments, survival evidence, and stock-specific recommendations was a key output from this workshop. The group also reviewed other case studies where the implications of discard survival on stock estimates and reference points are actively being explored, but not yet used in the assessments. The workshop also included a small seminar with a series of presentations on recent and current research activity related to discard survival. Ten presentations were made and included, among others, the discard survival of Nephrops, sole, rays, and small pelagics. This continues to be an active research area and there is currently substantial attention on the discard survival of rays in particular, which links to the EU conditional survivability exemption for skates and rays and associated evidence roadmap. A summary of each area of research activity is presented here. 2021-01-01T00:00:00Z http://hdl.handle.net/1893/29642 Title: Technical Considerations of closed containment sea pen production for some life stages of salmonids Author(s): Clarke, Roy; Maitland, Danielle; Bostock, John Abstract: We have investigated the technical and economic use of a closed containment sea pen nursery system for production of larger (circa 1 kg) fish for stocking in conventional cage systems with a view to reducing the duration of the marine on-growing phase in conventional open cages. This modified production strategy would reduce the time of exposure to sea lice, allow the capture of some of the solid waste from the culture operation and potentially allow more efficient use of ongrowing sites as the rate of throughput in those sites could be substantially increased 2018-12-01T00:00:00Z