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Ricardo I. Pérez-martín - One of the best experts on this subject based on the ideXlab platform.

  • Valorisation of Fish Discards assisted by enzymatic hydrolysis and microbial bioconversion: Lab and pilot plant studies and preliminary sustainability evaluation
    Journal of Cleaner Production, 2020
    Co-Authors: José Antonio Vázquez, Ricardo I. Pérez-martín, Javier Fraguas, J. Mirón, Jesus Valcarcel, Luis T. Antelo
    Abstract:

    Abstract The new EU Fishing policies (Landing Obligation) are aimed at preventing the elimination of Fishing Discards overboard. These new biomasses that have to be landed from 2019 force to stablish valorisation protocols since, in most cases, they cannot be used directly for human consumption. In this context, the aim of this work was to develop an integral process based on enzyme proteolysis that permitted jointly the production and recovery of Fish protein hydrolysates (FPHs), oils, bioactive peptides and Fish peptones. This procedure was initially applied to ten Fish Discards to lab scale. FPHs of high quality in terms of soluble protein and amino acid contents, digestibility and bioactivities were obtained. The growth and metabolites productions by Pediococcus acidilactici on peptones from FPHs was also evaluated with excellent results. Pilot plant trials confirmed the results of FPHs production obtained at lab scale. Finally, a comparison with the nowadays most common use of Fish biomass (Fish meal production) has been made as a preliminary sustainability assessment of the proposed FPHs valorisation chain.

  • Development of bioprocesses for the integral valorisation of Fish Discards
    Biochemical Engineering Journal, 2019
    Co-Authors: José Antonio Vázquez, María Blanco, Andrea Fernández-compás, Isabel Rodríguez-amado, Helena M. Moreno, Javier Borderías, Ricardo I. Pérez-martín
    Abstract:

    Abstract In the present work, we have developed a set of sequential and complementary alternatives to valorise five Fish Discards in order to recover and produce Fish mince, oils, gelatins, Fish protein hydrolysates (FPHs) with antioxidant and antihypertensive properties and marine peptones. In this last case, microbial bioconversion of marine peptones was studied by Pediococcus acidilacti growth, a well-known valuable lactic acid bacterium, and the concomitant production of lactic acid and pediocin SA-1. Highly digestible FPHs with a good quality of amino acids composition and antioxidant and antihypertensive properties were easily produced. In the same bioprocess, Fish oils with a healthy ω-3/ ω-6 ratio were also isolated. The use of peptones derived from FPHs as bacterial media nutrient (source of organic nitrogen) led to reduction of bioproductions costs between 2–5 folds in comparison with commercial culture medium.

  • Production of Valuable Compounds and Bioactive Metabolites from By-Products of Fish Discards Using Chemical Processing, Enzymatic Hydrolysis, and Bacterial Fermentation
    MDPI AG, 2019
    Co-Authors: José Antonio Vázquez, Ricardo I. Pérez-martín, Andrea Fernández-compás, Araceli Meduíña, Ana I. Durán, Margarita Nogueira, Isabel Rodríguez-amado
    Abstract:

    The objective of this report was to investigate the isolation and recovery of different biocompounds and bioproducts from wastes (skins and heads) that were obtained from five species discarded by Fishing fleets (megrim, hake, boarFish, grenadier, and Atlantic horse mackerel). Based on chemical treatments, enzymatic hydrolysis, and bacterial fermentation, we have isolated and produced gelatinous solutions, oils that are rich in omega-3, Fish protein hydrolysates (FPHs) with antioxidant and antihypertensive activities, and peptones. FPHs showed degrees of hydrolysis higher than 13%, with soluble protein concentrations greater than 27 g/L and in vitro digestibilities superior to 90%. Additionally, amino acids compositions were always valuable and bioactivities were, in some cases, remarkable. Peptones that were obtained from FPHs of skin and the heads were demonstrated to be a viable alternative to expensive commercial ones indicated for the production of biomass, lactic acid, and pediocin SA-1 from Pediococcus acidilactici

  • Valorization of recurrently discarded Fish species in trawler Fisheries in North-West Spain
    Journal of Food Science and Technology, 2018
    Co-Authors: M. Blanco, Ricardo I. Pérez-martín, F. Domínguez-timón, J. Fraguas, P. Ramos-ariza, J. A. Vázquez, A. J. Borderías, H. M. Moreno
    Abstract:

    The progressive elimination of Fish Discards established by the European Union Council in 2013 has stimulated the valorization of flesh from discarded high-quality species with good protein functional properties but which frequently have excessive Fish-bones, fat, strange flavours, soft texture, etc. The present study therefore focuses on valorization of the extracted muscle (minced muscle), from several Fish species frequently discarded in north-western Spanish Fisheries (Atlantic Ocean): Blue whiting ( Micromesistius poutassou ), Mackerel ( Scomber scombrus ), Red scorpionFish ( Scorpaena scrofa ), Pouting ( Trisoreptus luscus ) and Gurnard ( Trigla spp.). Valorization of these discarded Fish resources is a key objective for the survival of the Fishery sector in this area. In this regard present study was planned to examine the behaviour of the mince during 6 months of frozen storage by means of physicochemical and sensory analyses, and to test consumer acceptance of three technologically different products (burgers, nuggets and structured fingers) prepared with Fish mince from different species. Results indicated that protein aggregation started at the outset of frozen storage but progressed very slowly, with the exception of non-washed blue whiting and red scorpionFish minces. Moreover, during frozen storage lipid oxidation increased in all samples; the increase was with two objectives highest in minced mackerel, a fatty Fish, but no rancid flavour was detected. All mince samples presented acceptable physicochemical properties and good sensory acceptability after 6 months of frozen storage. Acceptability of final products made with these minces was high in all cases. Burgers were more acceptable for consumers aged over 40 and fingers and nuggets more for younger people.

  • Production of Fish Protein Hydrolysates from Scyliorhinus canicula Discards with Antihypertensive and Antioxidant Activities by Enzymatic Hydrolysis and Mathematical Optimization Using Response Surface Methodology.
    Marine Drugs, 2017
    Co-Authors: José Antonio Vázquez, María Blanco, Agueda E Massa, Isabel R. Amado, Ricardo I. Pérez-martín
    Abstract:

    Fish Discards are of major concern in new EU policies. Alternatives for the management of the new biomass that has to be landed is compulsory. The production of bioactive compounds from Fish protein hydrolysates (FPH) has been explored in recent years. However, the viability of Scyliorhinus canicula Discards, which might account for up to 90–100% of captures in mixed trawler, gillnet, and longline industrial Fisheries, to produce FPH from the muscle with bioactivities has still not been studied in terms of the optimization of the experimental conditions to enhance its production. The effect of pH and temperature on the hydrolysis of the S. canicula muscle was mediated by three commercial proteases using response surface methodology. Temperatures of 64.6 °C and 60.8 °C and pHs of 9.40 and 8.90 were established as the best hydrolysis conditions for Alcalase and Esperase, respectively. Optimization of the best conditions for the maximization of antihypertensive and antioxidant activities was performed. Higher Angiotensin-converting enzyme (ACE) activity was found with Esperase. The pH optimum and temperature optimum for antioxidants were 55 °C/pH8.0 for ABTS/DPPH-Esperase, 63.1 °C/pH9.0 for DPPH-Alcalase, and 55 °C/pH9.0 for ABTS-Alcalase. No hydrolysis was detected when using Protamex.

José Antonio Vázquez - One of the best experts on this subject based on the ideXlab platform.

  • Biogenic Calcium Phosphate from Fish Discards and By-Products
    Applied Sciences, 2021
    Co-Authors: Mónica Fernández-arias, José Antonio Vázquez, Iago Álvarez-olcina, Pablo Malvido-fresnillo, Mohamed Boutinguiza, Rafael Comesaña, Juan Pou
    Abstract:

    Every year, millions of tons of Fish waste are generated from Fishing activities, and a similar amount is discarded and returned to the sea as unwanted catches. This material can be used as a biological source for many potential new added-value products, such asobtaining hyaluronic acid from Fish eyeballs or extracting collagen from Fish skin, but there are not many utilities for Fish bones yet. This work tackles the transformation of Fish Discards into calcium phosphates. Discards from scorpionFish (Scorpaena scrofa) and Atlantic horse mackerel (Trachurus trachurus), as well as by-products generated from aquaculture activities (heads and trimmings frames) of salmon (Salmon salar), were used to obtain calcium phosphate. Biphasic carbonated hydroxyapatite (HA) /beta-tricalcium phosphate (TCP) material was obtained. The biphasic HA-TCP material has a promising range of applications in the biomedical field based on its similarity to calcium phosphates found in human bones in terms of crystallite size and carbonate content. The presence of Na, Mg, Sr, and K ions in the HA-TCP material is very beneficial, since they contribute to bone metabolism and cell adhesion.

  • Valorisation of Fish Discards assisted by enzymatic hydrolysis and microbial bioconversion: Lab and pilot plant studies and preliminary sustainability evaluation
    Journal of Cleaner Production, 2020
    Co-Authors: José Antonio Vázquez, Ricardo I. Pérez-martín, Javier Fraguas, J. Mirón, Jesus Valcarcel, Luis T. Antelo
    Abstract:

    Abstract The new EU Fishing policies (Landing Obligation) are aimed at preventing the elimination of Fishing Discards overboard. These new biomasses that have to be landed from 2019 force to stablish valorisation protocols since, in most cases, they cannot be used directly for human consumption. In this context, the aim of this work was to develop an integral process based on enzyme proteolysis that permitted jointly the production and recovery of Fish protein hydrolysates (FPHs), oils, bioactive peptides and Fish peptones. This procedure was initially applied to ten Fish Discards to lab scale. FPHs of high quality in terms of soluble protein and amino acid contents, digestibility and bioactivities were obtained. The growth and metabolites productions by Pediococcus acidilactici on peptones from FPHs was also evaluated with excellent results. Pilot plant trials confirmed the results of FPHs production obtained at lab scale. Finally, a comparison with the nowadays most common use of Fish biomass (Fish meal production) has been made as a preliminary sustainability assessment of the proposed FPHs valorisation chain.

  • Development of bioprocesses for the integral valorisation of Fish Discards
    Biochemical Engineering Journal, 2019
    Co-Authors: José Antonio Vázquez, María Blanco, Andrea Fernández-compás, Isabel Rodríguez-amado, Helena M. Moreno, Javier Borderías, Ricardo I. Pérez-martín
    Abstract:

    Abstract In the present work, we have developed a set of sequential and complementary alternatives to valorise five Fish Discards in order to recover and produce Fish mince, oils, gelatins, Fish protein hydrolysates (FPHs) with antioxidant and antihypertensive properties and marine peptones. In this last case, microbial bioconversion of marine peptones was studied by Pediococcus acidilacti growth, a well-known valuable lactic acid bacterium, and the concomitant production of lactic acid and pediocin SA-1. Highly digestible FPHs with a good quality of amino acids composition and antioxidant and antihypertensive properties were easily produced. In the same bioprocess, Fish oils with a healthy ω-3/ ω-6 ratio were also isolated. The use of peptones derived from FPHs as bacterial media nutrient (source of organic nitrogen) led to reduction of bioproductions costs between 2–5 folds in comparison with commercial culture medium.

  • Production of Valuable Compounds and Bioactive Metabolites from By-Products of Fish Discards Using Chemical Processing, Enzymatic Hydrolysis, and Bacterial Fermentation
    MDPI AG, 2019
    Co-Authors: José Antonio Vázquez, Ricardo I. Pérez-martín, Andrea Fernández-compás, Araceli Meduíña, Ana I. Durán, Margarita Nogueira, Isabel Rodríguez-amado
    Abstract:

    The objective of this report was to investigate the isolation and recovery of different biocompounds and bioproducts from wastes (skins and heads) that were obtained from five species discarded by Fishing fleets (megrim, hake, boarFish, grenadier, and Atlantic horse mackerel). Based on chemical treatments, enzymatic hydrolysis, and bacterial fermentation, we have isolated and produced gelatinous solutions, oils that are rich in omega-3, Fish protein hydrolysates (FPHs) with antioxidant and antihypertensive activities, and peptones. FPHs showed degrees of hydrolysis higher than 13%, with soluble protein concentrations greater than 27 g/L and in vitro digestibilities superior to 90%. Additionally, amino acids compositions were always valuable and bioactivities were, in some cases, remarkable. Peptones that were obtained from FPHs of skin and the heads were demonstrated to be a viable alternative to expensive commercial ones indicated for the production of biomass, lactic acid, and pediocin SA-1 from Pediococcus acidilactici

  • Production of Fish Protein Hydrolysates from Scyliorhinus canicula Discards with Antihypertensive and Antioxidant Activities by Enzymatic Hydrolysis and Mathematical Optimization Using Response Surface Methodology.
    Marine Drugs, 2017
    Co-Authors: José Antonio Vázquez, María Blanco, Agueda E Massa, Isabel R. Amado, Ricardo I. Pérez-martín
    Abstract:

    Fish Discards are of major concern in new EU policies. Alternatives for the management of the new biomass that has to be landed is compulsory. The production of bioactive compounds from Fish protein hydrolysates (FPH) has been explored in recent years. However, the viability of Scyliorhinus canicula Discards, which might account for up to 90–100% of captures in mixed trawler, gillnet, and longline industrial Fisheries, to produce FPH from the muscle with bioactivities has still not been studied in terms of the optimization of the experimental conditions to enhance its production. The effect of pH and temperature on the hydrolysis of the S. canicula muscle was mediated by three commercial proteases using response surface methodology. Temperatures of 64.6 °C and 60.8 °C and pHs of 9.40 and 8.90 were established as the best hydrolysis conditions for Alcalase and Esperase, respectively. Optimization of the best conditions for the maximization of antihypertensive and antioxidant activities was performed. Higher Angiotensin-converting enzyme (ACE) activity was found with Esperase. The pH optimum and temperature optimum for antioxidants were 55 °C/pH8.0 for ABTS/DPPH-Esperase, 63.1 °C/pH9.0 for DPPH-Alcalase, and 55 °C/pH9.0 for ABTS-Alcalase. No hydrolysis was detected when using Protamex.

Luis T. Antelo - One of the best experts on this subject based on the ideXlab platform.

  • Valorisation of Fish Discards assisted by enzymatic hydrolysis and microbial bioconversion: Lab and pilot plant studies and preliminary sustainability evaluation
    Journal of Cleaner Production, 2020
    Co-Authors: José Antonio Vázquez, Ricardo I. Pérez-martín, Javier Fraguas, J. Mirón, Jesus Valcarcel, Luis T. Antelo
    Abstract:

    Abstract The new EU Fishing policies (Landing Obligation) are aimed at preventing the elimination of Fishing Discards overboard. These new biomasses that have to be landed from 2019 force to stablish valorisation protocols since, in most cases, they cannot be used directly for human consumption. In this context, the aim of this work was to develop an integral process based on enzyme proteolysis that permitted jointly the production and recovery of Fish protein hydrolysates (FPHs), oils, bioactive peptides and Fish peptones. This procedure was initially applied to ten Fish Discards to lab scale. FPHs of high quality in terms of soluble protein and amino acid contents, digestibility and bioactivities were obtained. The growth and metabolites productions by Pediococcus acidilactici on peptones from FPHs was also evaluated with excellent results. Pilot plant trials confirmed the results of FPHs production obtained at lab scale. Finally, a comparison with the nowadays most common use of Fish biomass (Fish meal production) has been made as a preliminary sustainability assessment of the proposed FPHs valorisation chain.

  • Fish Discards management in selected Spanish and Portuguese métiers: Identification and potential valorisation
    Trends in Food Science & Technology, 2014
    Co-Authors: Tatiana Ordóñez-del Pazo, Ricardo I. Pérez-martín, Carmen G Sotelo, Luis T. Antelo, Amaya Franco-uría, Antonio A. Alonso
    Abstract:

    With the aim of promoting the responsible and sustainable management of marine resources, the European Union and the Food and Agriculture Organization of the United Nations (FAO) have established a set of international guidelines on by-catch management and reduction of Discards. In this framework, the minimisation of Discards and the optimal valorisation of inevitable unwanted biomass are the main objectives of the optimal and efficient Discards management network that has been developed in FAROS LIFE + Project. According to FAO, in 2008, around 27 million tonnes of marine biomass were used for non-food purposes, these including Fish meal, Fish oil, bait or high-added value compounds production by pharmaceutical or cosmetic industries. In this work, the most important discarded species by the selected metiers of interest for FAROS project have been analysed regarding possible valorisation options in a wide variety of sectors, including food products for human consumption. A protocol to easily determine the most suitable valorisation strategies for each of them has been also established. In order to carry out this approach, several factors as the status of stocks in the environment, the valorisation potential of each species or by-product and the amounts discarded by metier have been taken into account.

  • Fish Discards management: pollution levels and best available removal techniques.
    Marine pollution bulletin, 2012
    Co-Authors: Luis T. Antelo, Carla S. Lopes, Amaya Franco-uría, Antonio A. Alonso
    Abstract:

    Fish Discards and by-catch issues are highly topical subjects that are permanently under a social focus. Two main approaches are being considered to address this discard problem: reducing the by-catch and increasing by-catch utilization. Interest in increased by-catch valorization may arise from a greater demand for Fish products, such as the development of new markets for previously discarded species, the use of low-value specimens for aquaculture or the creation of value-added Fish products for the food, pharmaceutical or cosmetic industries. However, contaminants present in Fish Discards may be transferred to their valorized products, leading to possible long-term bioaccumulation and subsequent adverse health effects. In this valorization framework, the aim is to promote responsible and sustainable management of marine resources. The pollutant levels in catches from European Fisheries and the best available decontamination techniques for marine valorized Discards/by-products are compiled and analyzed in this work.

Emilia M Guadix - One of the best experts on this subject based on the ideXlab platform.

  • Production and identification of dipeptidyl peptidase IV (DPP-IV) inhibitory peptides from discarded Sardine pilchardus protein.
    Food chemistry, 2020
    Co-Authors: Fernando Rivero-pino, F. Javier Espejo-carpio, Emilia M Guadix
    Abstract:

    Production of bioactive peptides via enzymatic hydrolysis is a sustainable way to take advantage of proteinaceous by-products from food industry, such as Fish Discards. Sardine pilchardus protein was subjected to different enzymatic treatments using two endopeptidases of different selectivity and one exopeptidase in order to produce hydrolysates with antidiabetic activity. The highest dipeptidyl peptidase IV inhibitory activity was obtained by the combination of three enzymes (subtilisin, trypsin and flavourzyme) employed sequentially. This hydrolysate was subsequently purified by size exclusion chromatography to obtain fractions sorted by size (hydrodynamic volume). Peptides below 1400 Dalton had the highest activity, and these pools were analysed by mass spectrometry in order to identify the peptides responsible for that activity. Numerous peptides with adequate molecular features, it is, owning an alanine (A) as their penultimate N-terminal residue (e.g. NAPNPR, YACSVR) were identified and are proposed to be antidiabetic peptides from Sardine pilchardus muscle.

  • functional bioactive and antigenicity properties of blue whiting protein hydrolysates effect of enzymatic treatment and degree of hydrolysis
    Journal of the Science of Food and Agriculture, 2017
    Co-Authors: Pedro J Garciamoreno, Antonio Guadix, Raul Perezgalvez, Javier F Espejocarpio, Cristina Ruizquesada, Ana I Perezmorilla, Olga Martinezagustin, Emilia M Guadix
    Abstract:

    Fish Discards represent an important under-utilisation of marine resources. This study evaluated the up-grading of the protein fraction of blue whiting (Micromesistius poutassou) Discards by the production of Fish protein hydrolysates (FPHs) exhibiting functional, antioxidant, angiotensin-I converting enzyme (ACE)-inhibitory and antigenicity properties. RESULTS FPHs with low DH (4%) showed better emulsifying, foaming and oil binding capacities, particularly those obtained using only trypsin. FPHs with DH 4% exhibited also the stronger antioxidant activity, especially the one obtained using only subtilisin (IC50 = 1.36?mg protein mL?1). The presence of hydrophobic residues at the C-terminal of the FPH produced using subtilisin also led to the stronger ACE-inhibitory activity. However, FPHs with high DH (12%), which implies a higher proportion of short peptides, was required to enhance ACE-inhibition (IC50 = 172?µg protein mL?1). The antigenic levels of the FPH were also reduced with DH independently of the enzymatic treatment. Nevertheless, the highest degradation of Fish allergens (e.g. parvalbumin) was also obtained when using only subtilisin. CONCLUSION These results suggest that added-value products for food applications can be produced from the protein fraction of Discards. ? 2016 Society of Chemical Industry

  • Multiobjective optimization of a pilot plant to process Fish Discards and by-products on board
    Clean Technologies and Environmental Policy, 2016
    Co-Authors: Raúl Pérez-gálvez, Pedro J. García-moreno, Nguyen Thi My Huong, Antonio Guadix, Emilia M Guadix, J. P. Bergé
    Abstract:

    The current application of the zero Discards policy in EU Fisheries poses economic and logistic problems to Fishing vessels, which are obliged to retain and preserve unwanted catches on board. The installation of compaction devices on board can effectively reduce the space requirements and the refrigeration loads to store these materials on board. In the current work, the performance of a pilot hydraulic press was optimized to attain a maximal volume reduction (i.e., maximal yield of press liquor) while keeping a reduced pollution load of the liquid effluents. To this end, a designed experiment was conducted where the yield (Y), the content of suspended solids (SS), and the chemical oxygen demand (COD) of the press liquor were related to the main operation parameters of the pilot plant (i.e., number of pressing steps and time of relaxation between consecutive steps). Statistical modeling, coupled to a multiobjective optimization technique (i.e., the weighted-sum method), was employed to find a set of optimal solutions meeting three objectives: maximal Y (i.e., maximal volume reduction of the press cake), and minimal SS and COD of the press waters. This approach concluded that 5 pressing steps and a time of relaxation between 105 and 120 s ensured a low content of SS (0.0170–0.0185 kg solids/kg sardine), while the yield was high (0.1942–0.2001 kg liquid/kg sardine) and COD remained below 24.4 g O_2/kg sardine.

  • Production and identification of angiotensin I-converting enzyme (ACE) inhibitory peptides from Mediterranean Fish Discards
    Journal of Functional Foods, 2015
    Co-Authors: Pedro J. García-moreno, Antonio Guadix, F. Javier Espejo-carpio, Emilia M Guadix
    Abstract:

    Abstract The production of peptides exhibiting Angiotensin I-converting enzyme (ACE)-inhibitory activity from discarded Mediterranean Fish species such as sardine, horse mackerel, axillary seabream, bogue and small-spotted catshark was studied. The evolution of the ACE-inhibitory activity with the degree of hydrolysis (DH) of protein hydrolysates was also investigated. Hydrolysates of horse mackerel and small-spotted catshark, both obtained with the simultaneous addition of subtilisin and trypsin, showed the highest antihypertensive activity (IC50 of 279 and 302 µg/mL, respectively). For horse mackerel hydrolysate, fraction B (130–2350 Da) exhibited the highest ACE-inhibitory activity (IC50 = 85 µg/mL). In the case of small-spotted catshark hydrolysate, fraction D (

  • Discarded species in the west Mediterranean sea as sources of omega‐3 PUFA
    European Journal of Lipid Science and Technology, 2013
    Co-Authors: Pedro J. García-moreno, Raúl Pérez-gálvez, Antonio Guadix, Rocío Morales-medina, Emilia M Guadix
    Abstract:

    Five discarded Fish species in the Alboran Sea, namely axillary seabream (Pagellus acarne), small-spotted catshark (Scyliorhinus canicula), sardine (Sardina pilchardus), horse mackerel (Trachurus mediterraneus), and bogue (Boops boops) were evaluated as novel sources for the production of omega-3 polyunsaturated fatty acids (PUFAs). The lipid content of the five species varied significantly within the different seasons, being maximum in spring for axillary seabream, small-spotted catshark, and bogue (5.1, 2.7, 2.5%, respectively) and in summer for sardine and horse mackerel (13.6 and 6.2%, respectively). Sardine and horse mackerel presented also the maximum amount of eicosapentaenoic acid (EPA) + docosohexaenoic acid (DHA), 3000 and 1300 mg/100 g Fish, respectively. Their oils exhibited a composition of EPA + DHA higher than 23% and they were mainly composed by triacylglycerols. Axillary seabream, small-spotted catshark, and bogue presented a lower amount of EPA + DHA, 960, 650, and 157 mg/100 g Fish, respectively, but their oils also exhibited a composition of EPA + DHA higher than 20%. Particularly important was the composition of DHA, 23%, of the oil extracted from small-spotted catshark. Therefore, the five discarded species studied were found to be valuable raw material for the production of Fish oil presenting a high content in EPA and DHA. Practical applications: This work is in line with ongoing EU regulations avoiding Fish Discards. This has boosted research on the potential of these raw materials for the production of high added-value products such as omega-3 PUFAs, which are experiencing a growing commercial demand. This study provides a complete characterization of five discarded species in the Alboran Sea, with special focus on the availability of their omega-3 content throughout the year. Despite their different lipid content, all the species were good sources for the production of omega-3. The oils extracted from these species presented a maximum composition of EPA + DHA higher than 20%. Interestingly, small-spotted catshark's oil was relatively rich in DHA (up to 23%), which makes this oil an excellent functional ingredient for brain and children's health applications. The results obtained provide valuable information for food scientists interested in the production of omega-3 PUFAs from traditional and alternative Fish species.

E Van Barneveld - One of the best experts on this subject based on the ideXlab platform.

  • catch comparison of flatFish pulse trawls and a tickler chain beam trawl
    Fisheries Research, 2014
    Co-Authors: B Van Marlen, J A M Wiegerinck, E Van Oskoomen, E Van Barneveld
    Abstract:

    Abstract Pulse trawling is used to a growing extent in the Dutch flatFish beam trawl fleet, and deemed as a promising alternative to tickler chain beam trawling. A comparative Fishing experiment was carried out with one vessel using conventional beam trawls, and the other two using flatFish pulse trawls supplied by two different companies. Pulse trawl landings were lower both expressed in kg h−1 (67% based on auction data) or baskets per hectare (81%). The pulse trawls had fewer Fish Discards (57%, p