At AQUAEXCEL3.0, we know that great policy needs great science. For the past five years, we’ve been dedicated to advancing aquaculture research to build a more sustainable future for Europe. Today, we’re proud to show you how our work directly informs and supports smart policymaking. This section gives you a closer look at our key policy-relevant outputs, demonstrating how AQUAEXCEL3.0 is helping to build a more sustainable and prosperous future, one evidence-based policy at a time.
Are Sweden’s unique landlocked salmon and trout populations at risk from a common fish virus?
To answer this, researcher Charlotte Axen from the National Veterinary Institute of Sweden studied the effects of a specific virus strain (IPNV Genogroup 6) on local fish. The effects on rainbow trout, as well as on native salmon and brown trout from Lake Vänern were tested, to determine if the virus posed a threat to these semi-wild populations. The results demonstrated that the virus does not a pose a thread to landlocked salmonid strains of lake Vanern, and that although it is able to induce disease and mortality in rainbow trout and brown trout, the effects would not be alarming.
Why is this important to policy makers?
The results provide crucial scientific data to help animal and public health agencies make smarter decisions. It allows them to choose the right actions for managing fish diseases, rather than resorting to drastic and costly measures like shutting down farms. Ultimately, this builds public trust, ensures the long-term health of our aquatic life, and protects our food supply.
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How do microplastics affect brine shrimp?
Researcher Diogo Peixoto (CIIMAR) evaluated the potential biochemical effects of fluorescent red polymer microspheres (FRM) on Artemia franciscana. The results demonstrated that accumulation of microplastics in the gut by nauplii and juveniles induce negative effects on important physiological processes with influence on their health.
Why is this important to policy makers?
In 2019, the World Health Organization (WHO) published its first report on the effects of microplastics on human health. It concluded that there was not enough data yet on humans to know if microplastic particles were hurting us. As a result, WHO called for more research into microplastics. At the time of this study, there was no European law that covered microplastics in a comprehensive manner. As scientists gather more evidence that microplastic contamination harms marine life and the human food chain, policymakers can use this data to develop new regulations and strategies for effective monitoring and control.
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Introducing new low-trophic species for European aquaculture
Chelon labrosus (the thicklip grey mullet) is considered a candidate for aquaculture diversification in Europe and the Mediterranean. In AQUAEXCEL3.0, researchers from Fonzadione IMC and the University of Las Palmas de Gran Canaria tested a protocol to induce spawning in the species, with the goal of promoting a stable production of juveniles. The results of the study demonstrated that C. labrosus can be conditioned to mature its ovaries in captivity, paving the way towards the production of bottarga from captive reared individuals.
Why is this important to policy makers?
Policy makers could promote programs aimed at boosting the aquaculture of Mugilidae to develop aquaculture practices characterised by low environmental impact. Decision makers could rely on the results of this project to promote a stable production of C. labrosus juveniles, determining a positive impact on the income of fishing communities and promoting the diversification of fish production among aquaculture entrepreneurs.
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How do plant species and cropping systems influence hydroponics and aquaponics nutritional and microbial diversity?
The goal of the study, carried out by Ewumi Azeez from the University of South Bohemia was to assess the impact of plant species (lettuce and basil) and cropping systems (mono and mixed cropping) on microbial diversity and nutrient uptake in aquaponics and hydroponics. The results from the study revealed the capacity of aquaponics to improve the nutrient uptake in these systems and provide a baseline for the potential of the indigenous microbes at solving common challenges such as pest and disease management and nutrient dynamisms in the food production systems.
Why is this important to policy makers?
The results indicate that aquaponics can replicate a natural or organic ecosystem similar to soil-based systems and has the potential to address challenges in plant cultivation if thoroughly researched. Therefore, aquaponics should be considered within the ‘organic’ category as it meets the necessary criteria. Approving aquaponics products as organic will increase their market acceptability, thereby enhancing food production through a circular and sustainable system. This approval will also boost income and have positive ripple effects on the commercialisation of aquaponics systems.
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Innovative environmental enrichment strategies to improve the well-being and productivity of farmed trout
The goal of the research, carried out by Georgina Lea Fazekas, from the Hungarian University of Agriculture and Life Sciences, was to assess the long-term use of environmental enrichement on the growth performance and cognitive ability of rainbow trout. The project focused on studying the effects of an innovative and easy-to-maintain EE, generating a bubble curtain, at the early life stages of rainbow trout. The results from the study revealed that the implementation of physical, sensory, and occupational enrichment in the rainbow trout rearing environment reduces abnormal and aggressive behaviour in the group, which are considered negative indicators of welfare in farmed fish
Why is this important to policy makers?
This research is crucial for policymakers because it offers a cost-effective and sustainable solution to improve the welfare of farmed trout. By implementing this easy, innovative method, the aquaculture industry can increase productivity and profitability while also meeting rising consumer demand for ethically sourced and certified products. Ultimately, this work provides a clear path for government and industry to collaborate in building a sustainable and viable aquaculture sector.
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How is cancer being transmitted in bivalves in the Algarve region?
The research, carried out by Alicia Bruzos from the Université de Caen Normandie, assessed the prevalence and distribution of transmissible cancer in cockles and other cohabiting bivalve species in the Algarve region. The main results revealed that leukemic cancer was only found in cockles, and at a lower prevalence compared with previous samplings, suggesting that the epidemic may be evolving over time. Importantly, the study found that the other three species examined, including the additional species Scrobicularia plana, showed no signs of cancer. This is a significant finding as it suggests that the disease may be more contained or species-specific than previously thought.
Why is this important to policy makers?
This research provides evidence to inform more targeted management strategies for aquaculture. It suggests that while some bivalves like cockles are vulnerable to disease, others may not be as susceptible. This data can directly inform policies for monitoring and managing marine bivalve populations, helping to protect biodiversity and ensure the sustainability of marine resources.
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