Percorrer por autor "Guilgur, Leonardo Gaston"
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- Exploring sustainable alternatives in aquaculture feeding : the role of insectsPublication . Fantatto, Rafaela Regina; Mota, Joana; Ligeiro, Carolina; Vieira, Inês; Guilgur, Leonardo Gaston; Santos, Marisa; Murta, DanielThe aquaculture sector faces uncertainty due to environmental changes, economic factors, and availability of food resources. Conventional aquatic feeds heavily depend on fishmeal. This results in sustainability challenges due to overexploitation of wild fish stocks, rising costs, and environmental impacts, which has driven the search for innovative and sustainable alternatives, such as insects. European Union legislation has evolved to allow the use of certain insect species in aquafeeds, favoring the market access and approval of additional species. However, regulations still need to be standardized across countries and the substrates approved for insect feed clearly defined, since the nutritional composition of insects depend on species and diet. These ingredients have high potential to replace fishmeal in aquatic feeds, although, present challenges regarding optimal growth and digestibility, specially due to the chitin in composition, that need to be overcome. However, chitin and its derivatives may also have positive effects in fish feeds as prebiotic and immunomodulator. These insect-based protein sources have several benefits, such as efficient nutrient utilization, short maturation periods, and profitability, addressing the economic and environmental challenges associated with conventional aquafeed ingredients. Scientific studies indicate that insects have the potential to improve flesh quality, strengthen the immune system, and reduce disease susceptibility in farmed fish, promoting sustainable and productive aquaculture systems. The integration of insects as alternative protein sources in aquatic feeds can offer a promising path towards sustainable and environmentally friendly aquaculture systems. Based on the research available for this topic, this review aimed to evaluate the real potential of using insect-based raw-materials in feeds for aquaculture and their effects on growth, feed utilization, immunological response, disease resistance, quality, and safety of fish.
- From waste to resource : performance of Black Soldier fly larvae reared on restaurant food waste at an industrial scalePublication . Oliveira, Joana; Ligeiro, Carolina; Fantatto, Rafaela; Souza, Clarice Silva e; Machado, Maria Ana; Guilgur, Leonardo Gaston; Trindade, Alexandre; Assunção, Ricardo; Murta, DanielFood waste poses significant environmental, economic and public health challenges. The black soldier fly (Hermetia illucens) larvae (BSFL) represent a promising solution for organic waste valorisation, converting substrates into protein-rich biomass for animal feed and organic fertiliser. However, the use of food waste as an insect substrate remains prohibited in the European Union due to regulatory and safety concerns. This study evaluated the suitability of heterogeneous food waste for BSFL rearing under industrial conditions by comparing larval performance on a standard Gainesville diet (control) and a blend derived from local restaurant waste (test). The 14-day bioconversion assay assessed bioconversion rate (BCR), feed conversion ratio (FCR), survival rate, average growth rate, and nutritional composition. Compared with the control, the test group showed significantly improved (p < 0.001) BCR (18.34% vs. 11.02%), FCR (5.48 vs. 9.09 kg/kg), survival (69.29% vs. 51.30%), and growth (8.38 vs. 6.59 mg/day). Larvae reared on food waste also exhibited significantly higher protein (19.70% vs. 16.80%), fat (13.70% vs. 7.20%), ash (6.97% vs. 3.51%), carbohydrates (7.00% vs. 3.60%), and fibre (5.20% vs. 2.90%). Overall, heterogeneous food waste is a suitable substrate for BSFL, supporting agrifood sustainability; however, future research should focus on standardisation of these substrates.
- Genomic insights and bioconversion potential in the Black Soldier fly (Hermetia illucens) : current advances and future directionsPublication . Oliveira, Joana; Guilgur, Leonardo Gaston; Assunção, Ricardo; Murta, Daniel; Trindade, AlexandreThe global population continues to rise, placing increasing pressure on the agri-food sector and leading to the accelerated generation of urban organic waste, factors that collectively intensify climate stress and environmental instability. Insects are recognised for their remarkable capacity to transform substrates into valuable products, with the black soldier fly larvae (BSFL) emerging as one of the most efficient and widely utilised species for this purpose. Beyond recycling organic matter, BSFL can also mitigate microbial contamination, effectively reducing bacterial and fungal loads in waste substrates. Understanding and manipulating the genome could provide tools to improve BSFL bioconversion process and contribute to sustainability. In this review, we provide an overview of recent advances in black soldier fly genomics and genome-editing technologies. Although research in this subject remains limited, recent studies have clarified its origin, characterised its genome, and established the foundation for targeted genetic improvements to enhance by-product conversion, nutrient recovery, and environmental sustainability.