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Poster.-- 20th Meeting of the International Council for Near-Infrared Spectroscopy (ICNIRS) - NIR2021, A handheld near infrared (NIR) spectroscopy device, with a wavelength range from 900 nm to 1650 nm and coupled with two Partial Least-Squares Discriminant Analysis (PLS-DA) models, has been used to demonstrate its applicability as a proof of concept for quality monitoring of bigeye tuna (Thunnus obesus). First, a classification model was created to discriminate between injected and non-injected tuna samples. Then, a second classification model was developed to discriminate between non-injected and each water and additives treatment used. The results were promising, showing both models good results in the validation dataset. The first model, with 8 latent variables (LV), had an error-rate of 0.08 and an accuracy value of 0.93. It showed a good discrimination between injected and non-injected samples. The second model, with 10 LV, presented an error rate of 0.15 and an accuracy of 0.88. The discrimination between treatments was good even when protein hydrolysate solutions were used (sensitivity = 0.81; specificity = 0.99; precision = 0.87), a case which is typically hard to detect with accurate destructive analysis. This work opens new possibilities for onsite inspection in the fish industry, where NIR could be used as a complementary tool for the detection of water solutions in tuna, The research leading to these results has received funding from the Interreg Atlantic Area Project EAPA_87/2016, SEATRACES: Smart Traceability and Labeling ToolBox for a Sustainable Seafood Production. The authors acknowledge the Basque Government - Department of Economic Development, Sustainability and Environment – Directorate of Quality and Food Industries for the scholarship of S. Nieto-Ortega. B. Teixeira acknowledges the Portuguese Foundation for Science and Technology (FCT), the European Social Fund (FSE) and the Ministry of Education and Science for supporting a grant (Ref. SFRH/BPD/92929/2013). A. Velasco acknowledges the Spanish Ministry of Science, innovation and technology for the contract of technical staff (PTA2016-12254-I)

Poster.-- Close Encounters IIM (3rd Kind), Vigo, 23 June 2022, Estudo para atopar diferenzas entre o rodaballo salvaxe e acuicultura atendendo os seguintes parámetros: Determinación dos valores de bioimpedancia (BIA), análises composición proximal do peixe, microbioma bacteriano do mucus, branquias e intestino, así como obter os datos biométricos dos individuos de estudo

Poster.-- 20th Meeting of the International Council for Near-Infrared Spectroscopy (ICNIRS) - NIR2021 No

Poster.-- II International Symposium on Labelling and Authenticity of Seafood – ISLAS 2021, 20th and 21st October, Vigo

Poster.-- II International Symposium on Labelling and Authenticity of Seafood - ISLAS 2021, 20th and 21st October, Vigo

Poster.-- II International Symposium on Labelling and Authenticity of Seafood – ISLAS 2021, 20th and 21st October, Vigo

Poster.-- Aquaculture Europe 2021, October 4-7, Funchal-Madeira, Portugal

14 pages, 5 figures, [EN] Overweight and obesity constitute a serious child health problem worldwide. Acquiring good eating habits, along with physical activity, can affect health positively. In this context, the focus is on fish: it is usual that children do not like it, despite its beneficial properties. Dálle Valor ao Peixe (DVP, Galician language, in English, Give Value to population. In particular, it focused on a species that is usually discarded, mackerel, trying to contribute to the promotion of healthy sustainable consumption. Experiences as DVP can be a way to change the perception of schoolchildren about fish dishes, by offering learning in culinary skills that motivates them to consume it. The transmission of knowledge that supports certain food consumption habits is a valuable tool to achieve more conscious and responsible consumption in the future. DVP could serve as a basis for the development of a program to improve food habits maintained over time, adapting them and opening to a great range of ages, [ES] El sobrepeso y la obesidad constituyen un grave problema de salud infantil a nivel mundial. Adquirir unos buenos hábitos alimentarios, junto con la actividad física, pueden repercutir positivamente en la salud. En este contexto, se pone el foco en el pescado: es habitual que los más pequeños rehúsen probarlo, a pesar de sus propiedades beneficiosas. Dálle Valor ao Peixe (en castellano, Dale Valor al Pescado), la iniciativa que se expone en este artículo, pretendió promover un mayor y más variado consumo de pescado en la población infantil. En particular, se centró en una especie que habitualmente se descarta, el jurel, tratando de contribuir al fomento de un consumo saludable a la par que sostenible. Experiencias como DVP pueden constituir una vía para cambiar la percepción de los escolares por los platos de pescado, al ofrecer un aprendizaje en habilidades culinarias que les motive a consumirlo. La transmisión de un conocimiento que avale unas determinadas pautas alimentarias es una valiosa herramienta para lograr un consumo más consciente y responsable en el futuro. DVP podría servir como base para el desarrollo de un programa de mejora de los hábitos alimentarios que se mantenga en el tiempo, adaptándolo y abriéndolo a un mayor rango de edades

17th Scandinavian Symposium on Chemometrics 2021, Comwell Hvide Hus, Aalborg, Denmark, September 6-9, 2021, Fish is susceptible to be affected by practices that can lead to mislabelling [1], as the non-reported water addition during harvest, processing, and storage to compensate moisture losses [2]. Though this water addition must be included in the label if it makes up more than 5 % of the weight of the product [3], this declaration is not always added, leading to mislabelling problems. Non-destructive technologies, such as Time Domain Reflectometry (TDR), in combination with chemometrics, have emerged as powerful tools for the assessment of food quality parameters. TDR can probe the dynamics of dipolar molecules like water subjected to an alternating electric field, allowing a precise characterization of the dielectric properties of the sample. Changes in the amount of water in the muscle are expected to be detected by this technology [4]. In this work, a TDR sensor, (RFQ-SCAN®, Sequid company), coupled with two different classifiers (PLS-DA and SIMCA), have been used to detect the injection of different water solutions in fresh bigeye tuna (Thunnus obesus). A total of 11 dorsal and ventral loins were purchased in July 2018 and July 2019 (7 loins in 2018 and 4 loins in 2019). They were sectioned in portions of 500 g weight, and randomly distributed for the control and different injection treatments. The different treatments consisted of the injection of water with different additives: A. 3 % salt; B. 3 % salt + 3 % polyphosphates; C. 3 % salt + 5 % polyphosphates; D. 3 % salt + 5 % hydrolysate prepared from four-spot megrim Lepidorhombus boscii; E. a polyphosphate commercial solution. TDR signals were pre-processed using several techniques: SNV with and without detrend, Savitzky-Golay 1st and 2º derivatives and different combinations. All of them were also mean centred. Then, data were divided into a calibration and a validation dataset using the Duplex algorithm [5]. Both classifiers separated correctly control samples, with a precision of 0.94 in PLS-DA and 0.91 in SIMCA. However, they failed in the differentiation of some of the treatments, such as A and C (0.00 and 0.25 of precision with PLS-DA and 0.33 and 0.57 in SIMCA respectively). The precision in separation of treatments B, D and E gave good results with PLS-DA (0.75, 0.80 and 0.75 respectively) but poorer results with SIMCA (0.67, 0.67 and 0.50). As a conclusion, both classifiers work properly to separate control from the injected samples, but PLS-DA worked better to differentiate some of the injected treatments

3 pages

Poster.-- 9th International Symposium on Recent Advances in Food Analysis, November 5-8 2019, Prague

Poster.-- International conference on advances in marine technologies applied to discard mitigation and management, Vigo, 2 – 4 mayo 2018, Southwest Atlantic butterfish (Stromateus brasiliensis) is a demersal-pelagic fish which is abundant in some areas of FAO 41, where many trawlers operate targeting different species such as the Argentinian squid (Illex argentines) or hake (Merluccius hubbssi). This butterfish species is caught and discarded by these fleet with discard rates of 90 % or higher (IEO 2010-2014). There is not a consensus about whether Butterfishes of the genus Stromateus can be safely consumed by humans since it has been described that problems related with the type of fat, present in these fish, may produce some mild gastrointestinal issues. A sustainable use of resources as it is established in the European Common Fishery Policy suggests to find alternative uses for discarded fish. Proteins are one of the main components of organisms such as fish and, therefore, one valorisation strategy could be to obtain protein products from the main sources of proteins of discarded fish, such as skin and muscles, This work was supported by ARVI (Cooperativa de Armadores de Pesca del Puerto de Vigo) in the frame of the study “Valorización de especies no comerciales de la flota de buques congeladores (OPPC-3)”

1 poster.-- VI International Symposium on Marine Sciences, Vigo (Spain), 20-22th June 2018.-- C. G. Castro ... et al., This poster is a contribution of the project ‘i-SMALL: Importancia de lo pequeño en un océano en cambio: desentrañando la variabilidad de corta escala y el papel del plancton pequeño’ funded by Spanish Ministry of Science and Innovation (CTM2014-56119-R)

1 póster.-- 25th International ICFMH Conference, FoodMicro 2016, 19-22 July, This work has been funded by the Spanish Ministry of Science and lnnovation throughout project lS-FORQUALITY (AGL2012-39951-C02-01), RESISTANCE (DPI2014-54085-JIN) and FP7 SPECTRAFlSH project (FP7/2007-2013: grant no 605399).

1 poster presented at the 29th EFFOST International Conference, 10-12 November 2015, Athens, Greece, The research leading to these results has received funding from the European Union Seventh Framework Programme managed by REA Research Executive Agency http://ec.europa.eu/research/rea (FP7/2007-2013) under grant agreement number 605399

1 poster presented at VI International Conference on Environmental, Industrial and Applied Microbiology, Barcelona, 28-30 October 2015

1 poster presented at the 24th International ICFMH Conference, Food Micro 2014, 1-4 Septembre, Nantes, France, The potential of phage K in the removal and prevention of Staphylococcus aureus biofilms on stainless steel surfaces was examined. The host range of the phage was tested on 18 strains from the food industry. Two out of six sensitive strains were selected for study of biofilms. Immature 6-h-old biofilms were challenged wfth a wide range of multipticlties of infection {MOl, 0.01-500) for 18 h at 25ºc. A noticeable effect on cell number was appreciated at MOIs≥10, but no effect was detected at lower MOis. Subsequently, 24 h-old biofilms (with a higher cell density and a more dense extracellular matrix) were challenged too at MOIs between 0.01-3.0 for 24 hat 25ºc. Again, a significant effect was only found at MOls > 1. The effectiveness in the prevention of biofilm formation was examined by Infecting planktonlc cultures of S. aureus with sub-lethal and lethal doses of phage K (MOIs 1-10-7-10.0). A notable effect on cell number and biofilm biomass was observed from MOIs >1·10-5. The potential of phage K as a tool for biohygienization in the food Industry acting specifically against biofilms of S. aureus was thus shown. However, neither biofilm cells were completely removed nor biofilm formation was totally prevented, and a sub-population of live cells was left In both cases As a result, the effectiveness of two co-adjuvant-based strategies was subsequently assessed. Combining DNase (0,1-10 mg/ml) with phage K (MOl of 0.3-3.0) did not show an additional effect on the removal of 24 h-old-biofilms at 25°C. A 30 min pre-treatment at 37ºc aimed to enhance DNase activity also had not effect. DNase did not show any effects by itself either. In contrast, combining cis-2-decenoic acid {1 - 100 nM) with phage K (MOl of 0.03-0.3) seemed to show some effects on biofilms

10 pages, 5 tables, 1 figure.-- This article is licensed under a Creative Commons Attribution 4.0 International License, The waste of fish resources constitutes a serious environmental problem that must be avoided. The valorisation of by-catch species and decreasing the discard rate constitute a more efficient and sustainable use of these marine biomasses. In this work, we characterize and propose different potential uses for Stromateus brasiliensis, another frequently discarded (≥ 90%) and poorly studied by-catch species captured in the South Atlantic Ocean (FAO 41) by trawler fishing fleets. Furthermore, in the case of this species, freezing and frozen storage of the whole fish is the only strategy currently employed for its exploitation. The results revealed that muscle from S. brasiliensis presented a high content of polyunsaturated fatty acids (20.34%) and that the concentrations of both total diacyl glyceryl ethers (2.41%) and heavy metals (Hg 0.038, Pb 0.006 and Cd 0.018 mg/kg) were below the established limits for safe human consumption. Likewise, the protein hydrolysates proved to be a good source of amino acids for human consumption or animal feeding. Minced muscle blocks could be made by a mechanical separation process of the flesh, and the composition of minced muscle did not differ much from that of the whole fish. Furthermore, this process allows the incorporation of cryoprotectants and antioxidants to extend the frozen shelf life of this fatty fish. An extraction process from mechanically mixed skin and bones yielded a good source of collagen that should not be neglected, This work was funded by a contract with the “Cooperativa de Armadores del Puerto de Vigo”