CCM2-Artigos (em revistas ou actas indexadas)
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Percorrer CCM2-Artigos (em revistas ou actas indexadas) por Objetivos de Desenvolvimento Sustentável (ODS) "12:Produção e Consumo Sustentáveis"
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- Assessing fish welfare in small-scale commercial fixed-net fisheries off the southern portuguese coastPublication . Samel, Vighnesh Nilesh; Costa, Rita; Marçalo, Ana; Frade, Magda; Bentes, Luis; Saraiva, João; Gonçalves, Jorge Manuel Santos; Guerreiro, Pedro Miguel; Claudio D'IglioDespite a growing interest in animal welfare in production systems, research on fish welfare remains limited, particularly in commercial fisheries. Fish caught in fixed-net fisheries experience multiple stressors from the time of capture to mortality on deck considered detrimental to their welfare. We examined the impact of bottom-set gill nets and on-board handling on catch welfare using behavioural and physiological indicators. Vitality assessments were performed on four commercially important fish species on-board fishing vessels through a devised vitality scale that included behaviours, morphological condition and reflexes as indicators of welfare. Physiological stress parameters (Cortisol, Glucose, Lactate and Osmolality) were evaluated in blood collected on deck and analysed in relation to the vitality scores. The vitality at arrival on deck as well as the rate of decrease in vitality differed significantly amongst the tested species. Furthermore, Generalised Linear Models predicted that several biological, operational, and environmental variables significantly affect the extent of time the fish shows activity, and hence, on the welfare. Elevated average cortisol levels were found at all the vitality stages highlighting the stress experienced by fish due to the fishing process. The findings of this study enable us to recommend welfare-friendly methods in set-net fisheries to promote better fishing standards.
- Automated prediction of spawning nights using machine learning analysis of flatfish behaviourPublication . Qadir, Abdul; Duncan, Neil; González-López, Wendy Ángela; Serratosa, Francesc; Fatsini Fernández, ElviraSenegalese sole (Solea senegalensis) broodstock exhibit distinct behaviours (Rest the Head, Guardian, Follow, and Locomotor activities) that are important for breeding success. Understanding and monitoring these behaviours are essential to understand successful breeding of Senegalese sole. However, manually analysing these behaviours represents a significant challenge for human observers and is a labour-intensive process. Moreover, due to reproductive dysfunctions in Senegalese sole, aquaculture operations currently depend on wild origin breeders for successful spawning a reliance that is unsustainable in the long term. Therefore, to address these limitations, this study introduces a custom-designed framework based on computer vision and machine learning techniques. The model integrates object detection and tracking mechanisms to recognize and monitor reproductive behaviours of Senegalese sole within aquaculture environments. By combining advanced tracking algorithms, our model effectively extracts and analyses behavioural patterns from video datasets. The automated model behavioural analyses compared with manual analyses demonstrated strong performance, with accuracy, precision, and specificity exceeding 87 %, and a Pearson correlation of R = 0.99 between manual observation data and automated data. The model analysed videos to accurately identify behaviours with minimal human intervention, thereby saving a substantial number of hours and opened up the possibility to analyse behaviours over longer periods, generating more data. This is the first study to automatically analyse reproductive behaviours across full-night video recordings in Senegalese sole, providing new insights into how behavioural patterns relate to spawning. These behavioural changes in relation to spawning enable the model to effectively predict spawning and non-spawning nights with accuracies ranging from 70 % to 100 %. Such predictive capability can reduce dependence on wild origin breeders, support timely gamete collection, improve reproductive planning, and serve as a potential tool for hatchery automation.
- Blackfordia virginica in non-native distribution range: a potential food source for humans?Publication . Cruz, Mariana; Dias, Ester; Custódio, Luísa; Encarnação, João Pedro da Silva; Cruz, Joana; Baptista, Vânia; Teodosio, MariaThe seasonal occurrence of the Black Sea jellyfish Blackfordia virginica Mayer, 1910 blooms is a reason of concern in the Guadiana estuary in the South of Portugal (South-West Europe), causing considerable economic and ecological impacts to fisheries. Due to jellyfish biochemical properties, they may represent an opportunity as an alternative food source for humans. In this context, this work evaluated the nutritional profile of B. virginica (proximate composition, amino acids, minerals, and fatty acids methyl ester content). Blackfordia virginica biomass may be adequate for human consumption, as it has nutritional properties resembling other edible jellyfish species, with relevant levels of minerals, moderate content in crude protein, low-fat content, and a low energetic value. The high Cd levels in the biomass of B. virginica from the Guadiana Estuary may compromise its safety as a food source. Moreover, if these jellyfishes are proven as an edible invasive species, their management through fisheries should evaluate the cost effectiveness of investments.
- Clean production of microalgae high-value lipid fraction: influence of different pretreatments on chemical and cytotoxic profiles of Chlorella vulgaris supercritical extracts and life cycle assessmentPublication . Vladic, Jelena; Radman, Sanja; Zizak, Zeljko; Besu, Irina; Jerkovic, Igor; Galileu Speranza, Lais; Hala, Ahmad Furqan; Kovacevic, Strahinja; Gouveia, Luisa; Pereira, HugoMicroalgae have emerged as a promising natural resource rich in bioactive compounds. Health-beneficial properties of microalgae, coupled with advantageous characteristics such as high biomass productivity, adaptability, robustness, and carbon dioxide mitigation, position them as a viable solution for global sustainable food production. This study explored clean and environmentally friendly processes to enhance the recovery of lipid bioactive fractions. Microwave (MW), enzymatic (ENZ), and ultrasound (US) pretreatments were applied to improve environmentally friendly extraction of lipid-based components using supercritical CO2. The effects of these pretreatments on extraction yield, chemical profiles, and cytotoxic properties of Chlorella vulgaris (Cv) and smooth C. vulgaris (sCv) extracts were investigated. Additionally, a Life Cycle Assessment (LCA) was conducted to evaluate environmental impacts. MW pretreatment achieved the highest yield increases, from 2.58 times (Cv) to 3.15 times (sCv). UHPLC-ESI-HRMS analysis revealed shifts in the distribution of pigments and derivatives caused by pretreatments, with ENZ extracts showing the most pronounced changes: pigments increased from 9.24% (control Cv) to 40.92% (Cv) and from 12.52% (control sCv) to 71.12% (sCv). Cv extracts exhibited greater activity against MDA-MB-453 cells, while sCv extracts from US pretreatment demonstrated the strongest effect on HeLa cells. The LCA indicated reduced environmental impacts of the pretreatment-enhanced processes up to 65% compared to the control. A scenario analysis was presented to show further possible impact reduction by recirculating the CO2 solvent and substituting the energy source. These findings provide valuable insights into sustainable and scalable green processes for recovering microalgal bioactive components.
- Developing productivity and susceptibility attributes towards a rapid management-risk assessment of seaweedPublication . Milla-Figueras, David; Torres, P.; Botelho, A. Z.; Larrea, A.; Parente, M. I.; Afonso, P.The challenge of balancing conservation with sustainable use of marine resources faced by fisheries managers is quite often constrained by limited data on key species. This has become particularly true in the case of seaweed, which provide essential habitats for a diverse range of species in marine ecosystems and have long been valued by humans as food or, more recently, for their industrial applications. The expanding seaweed industry relies heavily on harvesting but historical declines in seaweed populations raise concerns over sustainability, leveraged by a general data-poor scenario for these species. To address this, we propose adapting the Productivity and Susceptibility Analysis (PSA) method—traditionally used in fishery assessments—for seaweeds. This novel approach incorporates the unique biology of seaweeds, including growth, reproduction, and susceptibility to environmental changes and harvesting practices, to evaluate their vulnerability. We applied this adapted PSA framework to a case study of seaweed harvesting in the Azores Archipelago, mid-north Atlantic, demonstrating its applicability in future science-based seaweed fisheries management srtategies. Among the 18 species studied, we identified five of high vulnerability (Cystoseira pustulata, Fucus spiralis, Gongolaria abies-marina, Laminaria ochroleuca, and Ericaria selaginoides). Our adapted PSA framework also considers local ecological impacts, stakeholder input, and relevant environmental factors, providing targeted management recommendations. While such a PSA does not replace stock assessments, it serves as a valuable risk assessment tool, identifying species needing greater management attention despite data limitations. Ultimately, this framework supports local, national and international policy and management measures, contributing to the conservation of coastal marine ecosystems.
- A dinuclear oxoperoxomolybdenum(VI) Complex, [Mo2O6(OH)2 (Pyridine Oxide Tetrazolate) 2], displaying the {MoO(O2)(OH)2MoO(O2)}0 core, and its catalytic performance in olefin epoxidationPublication . Nunes, Martinique S.; Neves, Patrícia; Gomes, Ana C.; Mendes, Ricardo F.; Paz, Filipe A. Almeida; D. Lopes, André; Silva, José Paulo da; Pillinger, Martyn; Valente, Anabela A.; Gonçalves, Isabel S.The dinuclear oxoperoxomolybdenum(VI) complex [Mo2O6(OH)2(pto)2] (1), containing a rare example of a hydroxo-bridged {MoO(O2) (μ-OH)2MoO(O2)}0 core, has been synthesized via the reaction of MoO3 with H2O2 and 5-(2-pyridyl-1-oxide)tetrazole (Hpto) and characterized by elemental analysis and ICP-OES, infrared and Raman spectroscopies, single crystal X-ray diffraction, nuclear magnetic resonance, and mass spectrometry. Compound 1 is an effective homogeneous catalyst for olefin epoxidation. The type of oxidant, namely tert-butyl hydroperoxide (TBHP) or H2O2, influences the catalytic performance. For cis-cyclooctene epoxidation, 1/TBHP led to 100% conversion after 4 h at 70 °C, and 1/H2O2 led to 80% conversion after 24 h at 70 °C. Catalyst recycling is feasible using an ionic liquid solvent with high affinity for the catalyst, and product separation via an extraction process. The catalytic potential of 1 was further explored for the chemical valorization of biomass-derived fatty acid methyl esters (FAMEs), namely C18-unsaturated methyl oleate and methyl linoleate derived from vegetable oils. The reaction of FAMEs/TBHP gave mainly epoxidized FAMEs (>97% selectivity at high conversions of 97–100%, at 70 °C). This catalyst is a rare example of a dinuclear organo-oxomolybdenum(VI) compound with the ability to epoxidize FAMEs.
- Diversity of bioactive compounds in microalgae: key classes and functional applicationsPublication . Osathanunkul, Maslin; Thanaporn, Suebsuya; Karapetsi, Lefkothea; Nteve, Georgia Maria; Pratsinakis, Emmanouil; Stefanidou, Eleni; Lagiotis, Giorgos; Avramidou, Eleni; Zorxzobokou, Lydia; Tsintzou, Georgia; Athanasiou, Artemis; Mpelai, Sofia; Constandinidis, Constantinos; Pantiora, Panagiota; Merino, Marián; Mullor, José Luis; Dobrovic, Luka; Cerasino, Leonardo; Ogawa, Tomohisa; Tsaousi, Meropi; Rodrigues, Alexandre M. C.; Cardoso, Helena; Pires, Rita; Rodrigues Figueiredo, Daniel; Figueiredo, Daniel; Costa, Inês F.; Anjos, Catarina; Labrou, Nikolaos E.; Madesis, PanagiotisMicroalgae offer a sustainable and versatile source of bioactive compounds. Their rapid growth, efficient CO2 utilization, and adaptability make them a promising alternative to traditional production methods. Key compounds, such as proteins, polyunsaturated fatty acids (PUFAs), polyphenols, phytosterols, pigments, and mycosporine-like amino acids (MAAs), hold significant commercial value and are widely utilized in food, nutraceuticals, cosmetics, and pharmaceuticals, driving innovation across multiple industries. Their antiviral and enzyme-producing capabilities further enhance industrial and medical applications. Additionally, microalgae-based biostimulants and plant elicitor peptides (PEPs) contribute to sustainable agriculture by enhancing plant growth and resilience to environmental stressors. The GRAS status of several species facilitates market integration, but challenges in scaling and cost reduction remain. Advances in biotechnology and metabolic engineering will optimize production, driving growth in the global microalgae industry. With increasing consumer demand for natural, eco-friendly products, microalgae will play a vital role in health, food security, and environmental sustainability.
- Early career ocean professionals' declaration on ocean negative carbon emissions for our ocean and future.Publication . Li, Shenghui; Addey, Charles I.; Roman, Raphaël; Hayashida, Hakase; Jiang, Chunhua; Hu, Chen; Coronado-Álvarez, Luz de Lourdes Aurora; Lim, Hyung-Gyu; Akmal, Surya Gentha; Orji, Chukwuka Moses; Arora, Parth; Li, Ruiqi; Pm, Sohan; Adesina, Rasheed B.; Lindemann, Christian; Ma, Deqiang; Sarkar, Saydul; Mascioni, Martina; Monteiro, Thiago; Liu, Chao; Ojwala, Renis Auma; Tabilog, Matthew Vincent; Roeroe, Kakaskasen Andreas; Oladejo, Hafeez O.; Daramola, Samuel O.; Da Costa, Delio; Guo, Ting; Chicaiza-Ortiz, Cristhian; Adebiyi, Abiola A.; Ahmed, Md Rasel; Baloch, Aidah; Andueza, Santiago Thomé; Ansong, Joseph Kofi; Appalanaidu, Sura; Asif, Furqan; Awa, Andrew Taylor; Baguya, Elnalee; Batista, Matheus; Benedict, Okeke Ebuka; Bobby, Fulton; Busumprah, Peter Teye; Cardoso, Marta; de Oliveira Carvalho, Andréa da Consolação; Crea, Terrence Daniel; Channimol, Ky; Cheah, Wee; Chinwendu, Igbodiegwu Gloria; Dinoi, Alessia; Egbe, King-James I; Eshun, Joseph; Gaitan Espitia, Juan Diego; Essel, Dorcas Akua; Fox, Natalie; Fraser, Kate; Gaglioti, Martina; Gerbrand, Koren; Gusatu, Laura; Hernández Contreras, Diego Alexander; Iradukunda, Theddy-Michel; Khalfan, Zahor Mwalim; Khatib, Laura; Kim, Minkyoung; Koch, Marta; Liu, Jihua; Mandal, Shailendra K; Manivong, Soukphansa; McAteer, Benedict; Mgbechidinma, Chiamaka Linda; Ngo, Thuy Hao; Nirmale, Manasi Suhas; Noonan Birch, Ronnie; Oginni, Tolulope E; Olalekan, Isa Elegbede; Offei-Darko, Lord; Puigcorbé, Viena; Gandhi, Rishi Rajendra; Rozaimi, Mohammad; Sanganyado, Edmond; Sengupta, Debarati; Singh, Priyatma; Sridhar, Dumpala; Sunanda, N.; Tailor, Falguni; Tintoré, Beatriz; Ugochukwu, Okoli Moses; Uthaipan, Khanittha; Vargas-Fonseca, O Alejandra; Verma, Anmol; Vives, Clara R.; Wallschuss, Sina; Wang, Lin; Wang, Yuhao; Wang, Yuntao; Meng, Yabing; Schoenbeck, María; Yan, Wei; Yen, Hanna; Luo, TingweiThis paper highlights the urgent need to accelerate research and action on ocean carbon sinks through human intervention, known as the Global Ocean Negative Carbon Emissions (Global-ONCE) Programme, as a vital strategy in global efforts to mitigate climate change. Achieving "net zero" by 2050 cannot rely on emission reductions alone, emphasizing the necessity of complementary approaches. Global-ONCE's mission extends beyond scientific exploration. It embodies a profound commitment to protecting and restoring blue carbon ecosystems, as well as implementing ocean-based solutions that are sustainable, equitable, and inclusive. Early career ocean professionals (ECOPs) are at the heart of these efforts, and their innovative approaches, technical expertise, and passion make them indispensable leaders in advancing ONCE initiatives. ECOPs bridge the gap between science and society, playing a relevant role in integrating cutting-edge research, technological advancements, and community-driven action to address climate threats. By bringing together diverse perspectives and leveraging their interdisciplinary expertise, ECOPs ensure that ONCE strategies are grounded in scientific rigor and practical feasibility. Through advocacy, education, and collaboration, ECOPs not only spearhead research and innovation but also inspire collective action to safeguard our oceans. This paper amplifies the critical role of ECOPs as agents of change and calls for a unified global commitment to harness the ocean's potential for a climate-resilient future.
- Effect of petrochemical contaminants on the photosynthetic physiology on the seagrass Halophila baillonii AschersonPublication . Lima, Maria Cecilia S.; Lima, Thomaz Henrique A.; Sperandio, Marcus V. Loss; Yogui, Gilvan Takeshi; Silva, João; Magalhães, Karine M.Oil spills represent a significant threat to seagrasses as hydrocarbons can impair photosynthetic processes and plant functioning, although physiological responses may vary depending on the spill and environmental conditions This study investigates the physiological responses of Halophila baillonii when exposed to the watersoluble fraction (WSF) of crude oil. Photosynthetic pigment composition, maximum quantum yield (Fv/Fm), and oxidative stress indicators malondialdehyde (MDA) and hydrogen peroxide (H2O2) were analyzed after shortterm exposure. A significant increase in chlorophyll a and b concentrations and variations in carotenoid levels were detected, while photochemical efficiency and oxidative stress indicators were maintained. These findings suggest that the species dynamically adjusts its pigment composition to optimize light capture and mitigate oxidative stress, demonstrating physiological plasticity. Its ability to tolerate WSF exposure highlights the species' short-term resilience to hydrocarbon pollution. Future studies should investigate the effects of long-term exposure to different oil types, such as boat fuel, and the recovery mechanisms of seagrasses.
- Effects of light quality and intensity on growth and bromoform content of the red seaweed Asparagopsis taxiformisPublication . Gonçalves Torres, Raquel; Campos, Ana Margarida; Goldman, Jacob; Barrote, Isabel; Mata, Leonardo; Silva, JoãoSpecies of the genus Asparagopsis are rich in halogenated bioactive compounds, particularly bromoform. Its use as a feed additive in ruminant livestock drastically decreases the animal’s methane production, thereby reducing the industry’s environmental impact. Addressing the high demand for Asparagopsis biomass requires the understanding of the culture conditions that promote higher growth rates and bromoform content. Here we evaluated how different light quality combinations (High-Blue:Red, Medium Blue:Red, High-Blue:Green:Red, and White) and four light intensities (30, 60, 90 and 120 μmol photons m−2 s −1) affect the growth and bromoform content of the Asparagopsis taxiformis tetrasporophyte in indoor tumbling cultures at two biomass densities. We also assessed the effect of light intensity on the photosynthetic response by measuring oxygen evolution rates. Light spectra containing intermediate wavelengths promoted higher growth, regardless of biomass density. Of the different light qualities tested, white light promoted the highest bromoform content. Increasing light intensity led to a positive response in A. taxiformis growth. However, the photosynthetic parameters estimated showed that the two higher light intensity treatments were above the saturation irradiance, for both culture densities. This, along with the observed development of contamination, suggests that long-term cultures of A. taxiformis should be maintained at light intensities no higher than 60 μmol photons m−2 s −1. In addition, we found that exposing cultures to higher irradiances does not guarantee a bromoform-richer biomass. These results offer valuable insights for optimizing biomass and bioactive compound production in indoor cultures of the Asparagopsis genus.