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	Provedor de dados Organic Eprints (16) Autor Pedersen, Lars-Flemming (16) Jokumsen, Alfred (9) Larsen, Villy J. (5) Henriksen, Niels Henrik (4) Gesto, Manuel (3) Liu, Dibo (3) Madsen, Lone (3) Meinelt, Thomas (3) Strauss, David L. (3) Larsen, Erling P. (2) Lund, Ivar (2) Nielsen, Max (2) Nielsen, Thorkild (2) Andersen R., Nikolaj (1) Buchmann, Kurt (1) Høglund, Erik (1) Kania, Per (1) Lazado, Carlo Cabacang (1) Lorenzen, Niels (1) Pedersen, Per Bovbjerg (1) Mais... Palavra-chave Health and welfare (15) Aquaculture (11) Production systems (6) Air and water emissions (3) Breeding and genetics (2) Feeding and growth (2) Balancing and resource management Air and water emissions Education (1) Extension and communication (1) Food quality and human health Recycling (1) Food security (1) Markets and trade (1) Regulation (1) Mais... Tipo do documento Newspaper or magazine article (5) Journal paper (4) Conference paper, poster, etc. (3) Report (3) Working paper (1) Ano 2019 (1) 2018 (2) 2017 (4) 2016 (4) 2015 (3) 2014 (2) Mais... País Germany (16) Idioma Inglês (7) da (2) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 16 Primeira ... 1 ... Última Pereddikesyre er et trumfkort for økologiske dambrug Organic Eprints Pedersen, Lars-Flemming. Pereddikesyre produkter kan anvendes til vandrensning og kontrol af vandkvalitet i akvakultur systemer. Her beskrives seneste praktisake erfaringer med anvendelse af pereddikesyre (PAA) som alternativ til formalin, kloramin-T eller kobbersulfat. PAA har stærk antimikrobiel effekt, det er let-nedbrydelig og relativt sikkert i brug. PAA er en stærk oxidant og ligner ozon i virkemåde og henfald. Dette kan være en udfordring i forhold til optimeret brug og den mest lovende løsning synes at være kontinuert doserimng i lave doser. PAA er på listen over godkendte hjælpestoffer til økologisk akvakultur, hvor formalin er forbudt. Tipo: Newspaper or magazine article Palavras-chave: Health and welfare; Aquaculture. Ano: 2015 URL: http://orgprints.org/28798/11/28798.pdf Pulse versus continuous peracetic acid applications: Effects on rainbow trout performance, biofilm formation and water quality Organic Eprints Liu, Dibo; Strauss, David L.; Pedersen, Lars-Flemming; Meinelt, Thomas. Peracetic acid (PAA) products are being introduced to aquaculture as sustainable disinfectants. Two strategies are used to apply PAA: high dose pulse applications, or low dose continuous application. In the present study, their impacts on fish health and water quality were investigated in triplicate flow-through tanks stocked with rainbow trout. The gentler and shorter water cortisol increase measured along twice-per-week pulse applications of 1 mg L−1PAA indicated a progressive adaptation of fish. In contrast, the continuous application of 0.2 mg L−1PAA caused no stress to fish. Meanwhile, no mortality and no impact on growth or innate cellular immunity were observed. The pulse applications restricted biofilm formation, and partially inhibited... Tipo: Journal paper Palavras-chave: Health and welfare; Aquaculture. Ano: 2017 URL: http://orgprints.org/31461/1/Liu%20et%20al%202017.pdf SHELTERFISH New tools to improve fish health and environment in organic aquaculture Organic Eprints Jokumsen, Alfred; Gesto, Manuel; Buchmann, Kurt; Lorenzen, Niels; Pedersen, Lars-Flemming; Henriksen, Niels Henrik; Schmidt, Jacob; Madsen, Lone; Kania, Per; Pedersen, Per Bovbjerg. Rainbow trout farming and in particular organic rainbow trout farms are critically challenged by the relatively high prevalence of skin/gill infections caused by various pathogens, especially the parasite Costia (Ichthyobodo necator) and amoebae, which are ultimately lethal for fry/smaller fish. In addition, a Midichloria-like bacterium causes the non-lethal skin disease Red Mark Syndrome (RMS), which results in downgrading/rejection of up to 30% of the fish when placed on the market. Treatment by use of antibiotics/parasitics/ auxiliary compounds is only possible to a limited extent in organic trout production. Hence, solutions to prevent and/or treat costia, amoebae and RMS are urgently needed, not only to secure production of organic rainbow trout in... Tipo: Conference paper, poster, etc. Palavras-chave: Production systems; Health and welfare; Aquaculture. Ano: 2019 URL: http://orgprints.org/36515/1/Jokumsen_ShelterFish_Poster_.pdf Effekt af pereddikesyre-dosering på ørreders stressrespons Organic Eprints Pedersen, Lars-Flemming. Hovedformålet med kontrollerede forsøg med pereddikesyre vandbehandling har været at videreudvikle en effektiv vandbehandlingspraksis, der ikke påfører fiskene unødigt stress. Vandbehandling med pereddikesyre (PES) fører ofte til kortvarige adfærdsændringer hos fiskene, og det er velkendt i erhvervet, at fiskene skal ”vænne sig til stoffet”. Der foreligger ingen undersøgelser, der har belyst effekten af PES på fiskenes velfærd ud fra mål for fysiologisk stress, ligesom effekten af doseringsformen er ukendt. Derfor blev der igangsat en undersøgelse med det formål at undersøge effekten af PES dosering på regnbueørreder. Tipo: Working paper Palavras-chave: Health and welfare; Aquaculture. Ano: 2017 URL: http://orgprints.org/31460/1/Technical%20note%20Peracetec%20acid%20on%20trout%20stress%20response_D5%202%201.docx Los pros y los contras del percarbonato de sodio Organic Eprints Pedersen, Lars-Flemming; Jokumsen, Alfred. El artículo trata del uso de un agente desinfectante aprobado para acuicultura: percarbonato sódico (SPC). La substancia es un polvo que contiene peróxido de hidrógeno y es fácil de utilizar; cuando se añade a las instalaciones de los peces, el peróxido de hidrógeno se disuelve y se descompone formando oxígeno y agua. Este artículo presenta los resultados de mediciones realizadas en enero de 2017 tras una aplicación práctica en una granja de acuicultura orgánica. El estudio muestra que la aplicación de SPC resultó en una distribución uniforme de peróxido de hidrógeno en el agua, que se mantuvo durante unas pocas horas. Con el tratamiento se observó una liberación simultánea de oxígeno y también un incremento significativo del pH, algo que debe tenerse en... Tipo: Newspaper or magazine article Palavras-chave: Production systems; Health and welfare; Aquaculture. Ano: 2017 URL: http://orgprints.org/31519/1/Los%20pros%20y%20los%20contras%20del%20percarbonato%20de%20sodio%20%20Global%20Aquaculture%20Advocate.pdf Nye miljøvenlige desinfektionsmidler til økologiske dambrug Organic Eprints Pedersen, Lars-Flemming. Pereddikesyre og brintoverilte kan anvendes til vandrensning og kontrol af vandkvalitet i akvakultur systemer. Her beskrives seneste praktisake erfaringer som alternativ til f. eks. formalin. De nye desinficerende midler er mildere og kan håndteres på en væsentlig mere sikker måde end formalin. Da begge produkter nedbrydes hurtigt, omsættes en stor del af den tilsatte mængde direkte i dammene. Ved nedbrydningen frigives ilt fra brintoverilte, mens pereddikesyre nedbrydes til vand og kuldioxid. Der udledes således mindre mængder af de to stoffer til vandløbet, og da de effektive behandlingskoncentrationer i forvejen er lave, er miljøpåvirkningen minimal. Tipo: Newspaper or magazine article Palavras-chave: Air and water emissions; Health and welfare. Ano: 2016 URL: http://orgprints.org/30280/1/%C3%98kologi%20%26%20Erhverv%20no.%20590_2%20JJuni%202016.pdf Nye miljøvenlige desinfektionsmidler til økologiske dambrug Organic Eprints Pedersen, Lars-Flemming. Pereddikesyre og brintoverilte kan anvendes til vandrensning og kontrol af vandkvalitet i akvakultur systemer. Her beskrives seneste praktisake erfaringer som alternativ til f. eks. formalin. De nye desinficerende midler er mildere og kan håndteres på en væsentlig mere sikker måde end formalin. Da begge produkter nedbrydes hurtigt, omsættes en stor del af den tilsatte mængde direkte i dammene. Ved nedbrydningen frigives ilt fra brintoverilte, mens pereddikesyre nedbrydes til vand og kuldioxid. Der udledes således mindre mængder af de to stoffer til vandløbet, og da de effektive behandlingskoncentrationer i forvejen er lave, er miljøpåvirkningen minimal. Tipo: Newspaper or magazine article Palavras-chave: Air and water emissions; Health and welfare. Ano: 2016 URL: http://orgprints.org/30281/1/ICROFS%20Nyt_16062016.pdf Rapport fra RobustFish temadag d. 5. april 2018 Organic Eprints Jokumsen, Alfred; Gesto, Manuel; Lund, Ivar; Madsen, Lone; Andersen R., Nikolaj; Pedersen, Lars-Flemming; Larsen, Erling P.; Nielsen, Max; Nielsen, Thorkild; Larsen, Villy J.. Formålet med RobustFish projektet var at: • Styrke udviklingen af økologisk ørredproduktion i Danmark men også til gavn for konventionelt opdræt • Undersøge ørredyngels robusthed i forhold til start-fodrings adfærd, fedtsyreindholdet i foderet og følsomhed over for yngeldødeligheds-syndromet (YDS) • Effekt af vandbehandling med hjælpestoffer • Viden om markedsforhold, forbrugerkendskab, produktudvikling og øget afsætning. Robustfish har adresseret ovennævnte problemstillinger, og på grundlag af opnåede resultater kan der drages følgende konklusioner og deraf følgende anbefalinger og perspektiver for styrkelse af det økologiske opdræt af regnbueørred i Danmark. • Yngel med tidlig fødesøgnings adfærd (swim-up) viste tendens til større robusthed... Tipo: Report Palavras-chave: Production systems; Feeding and growth; Markets and trade; Health and welfare; Aquaculture. Ano: 2018 URL: http://orgprints.org/33577/1/Workshop_Report_Presentations_FINAL.pdf Confirmation that pulse and continuous peracetic acid administration does not disrupt the acute stress response in rainbow trout Organic Eprints Gesto, Manuel; Liu, Dibo; Pedersen, Lars-Flemming; Meinelt, Thomas; Strauss, David L.; Jokumsen, Alfred. Peracetic acid (PAA) is considered an eco-friendly alternative to other antimicrobial agents of common use in aquaculture. The literature suggests that fish can habituate to PAA exposure based on a reduction of the fish corticosteroid response to PAA administration after repeated exposures. If that is true, PAA would also be a good option from the point of view of fish physiology. However, stronger evidence is needed to confirm that the use of PAA is welfare-friendly to fish. Besides habituation, other hypothetical factors such as desensitization, physiological exhaustion or PAA-mediated endocrine disruption could potentially explain the reduction in the corticosteroid response after repeated/prolonged PAA exposure. In this study, rainbow trout that had... Tipo: Journal paper Palavras-chave: Health and welfare. Ano: 2018 URL: http://orgprints.org/32935/3/Gesto%20et%20al.%20Con%EF%AC%81rmation%20that%20pulse%20and%20continuous%20peracetic%20acid%20administration%20does%20not%20disrupt%20the%20acute%20stress%20response%20in%20rainbow%20trout_.pdf Linking water treatment practices and fish welfare Organic Eprints Zubiaurre, Claire; Pedersen, Lars-Flemming. Peracetic acids can be used as sanitizers to control water quality in aquaculture systems. As an alternative to formalin, chloramine-T or copper sulphate, PAA has strong anti-microbial effects, degrades quickly and is relatively safe to use. Its mode of action and associated rapid decay can make optimizing treatment protocols a challenge. Continuous low-dose applications seem to be a promising solution. In this preliminary study behavioral response was used to assess potential correlations with PAA dosage. A behavioral change or response is not necessarily an indication of compromised welfare. Supportive enzymatic, biochemical and physiological biomarkers can be used along with gill and epidermal histological measures to evaluate the effects on water... Tipo: Newspaper or magazine article Palavras-chave: Production systems; Health and welfare; Aquaculture. Ano: 2016 URL: http://orgprints.org/29842/1/Zubiarre%20%20Pedersen%202016_Linking%20water%20treatment%20practices%20and%20fish%20welfare.pdf Promising water treatment practices with peracetic acid products Organic Eprints Pedersen, Lars-Flemming; Jokumsen, Alfred; Larsen, Villy J.; Henriksen, Niels Henrik. Peracetic acid products can be used as sanitizers to control water quality in aquaculture systems. Here we describe recent practical experiences of applying peracetic acid (PAA) as an alternative to formalin or sodium chloride. PAA has strong antimicrobial effect, it is easy degradable and relatively safe to use work-wise. Being a strong oxidant, PAA resembles ozone in its mode of action and the associated rapid decay. This can be a challenge towards optimizing treatment protocols, and continuous low dose applications seem to be a promising solution. PAA is listed among the few disinfectants to be approved to be applied in organic aquaculture where formalin is prohibited (EU, 2014a). As of January 2016, organic trout production fully depends on organic... Tipo: Report Palavras-chave: Food security; Food quality and human health Recycling; Balancing and resource management Air and water emissions Education; Extension and communication. Ano: 2014 URL: http://orgprints.org/28340/7/28340.pdf ”Pulse vs. Continuous Treatment: which is better for applying peracetic acid in RAS?” Organic Eprints Liu, Dibo; Pedersen, Lars-Flemming; Lazado, Carlo Cabacang; Strauss, David L.; Meinelt, Thomas. Peracetic acid (PAA) can improve water quality in a way that does not affect the fish, the farmer nor the environment. This presentation included recent findings of ways to improve PAA water treatment strategies. The study compared two distinct way of applying PAA – either as a pulse or as low dose continuous addition. Selected markers to address potential negative impact on fish welfare were used. Cortisol expression was temporarily increased following pulse addition but subsequently fish adapted and cortisole expression remained at low, similar levels as measured among control fish and fish exposed to continuous low dose PAA exposure. Pros and cons about PAA application and its consequences were discussed as well. Tipo: Conference paper, poster, etc. Palavras-chave: Production systems; Health and welfare; Aquaculture. Ano: 2016 URL: http://orgprints.org/31478/1/ICRA2016.pdf ROBUSTFISH: NEW POSSIBILITIES FOR GROWTH AND ROBUSTNESS IN ORGANIC AQUACULTURE Organic Eprints Jokumsen, Alfred; Høglund, Erik; Lund, Ivar; Madsen, Lone; Pedersen, Lars-Flemming; Nielsen, Max; Nielsen, Thorkild; Larsen, Villy J.; Larsen, Erling P.. The aim of Robustfish project is to answer the following research questions: (1) Is it possible to select robust rainbow trout fry early in development before they enter the more cost intensive steps in the production cycle? (2) Does sustainable (non-fish based) dietary lipid sources affect stress resilience and immune-competence of the fry? (3) Related to (1) and (2): Is improved resistance to RTFS achieved? (4) How will the market respond to a significant increase in production of organic trout, i.e. consumer preferences and competiveness by companies in the value chain? RobustFish will strengthen the development of Danish organic trout production. In this respect the robustness of the fry to diseases is crucial, i.a. RTFS. The robustness of the fry... Tipo: Conference paper, poster, etc. Palavras-chave: Feeding and growth; Breeding and genetics; Health and welfare; Aquaculture. Ano: 2014 URL: http://orgprints.org/27821/12/27821.pdf Udvikling af dansk økologisk yngelopdræt Organic Eprints Larsen, Villy J.; Henriksen, Niels Henrik; Pedersen, Lars-Flemming; Jokumsen, Alfred. Projektet har understøttet etablering, omlægning, drift og optimering af sygdomsforebyggelse af de første danske fiskeopdrætsanlæg med produktion af økologisk øjenæg og fiskeyngel. Dette er sket med henblik på at være på forkant med implementering af bestemmelsen herom i EU forordning for økologisk akvakultur (EC no. 710/2009, artikel 25e) og herved at sikre produktion af økologisk yngel til økologisk fiskeproduktion i Danmark og/eller eksport med henblik på videreproduktion i udlandet. I løbet af projektet er to avlsdambrug omlagt til økologisk produktion af øjenæg og yngel af regnbueørred og bækørred. Ved projektets afslutning er Danmark EU’s største producent af økologiske øjenæg og yngel af de to ørredarter, med mulighed for eksport af disse produkter. Tipo: Report Palavras-chave: Breeding and genetics; Health and welfare; Aquaculture. Ano: 2015 URL: http://orgprints.org/29429/1/Projektrapport-%C3%98kologisk%20yngel.pdf The pros and cons of sodium percarbonate Organic Eprints Pedersen, Lars-Flemming; Jokumsen, Alfred. The article deals with the use an approved aquaculture sanitizer: sodium-percarbonate (SPC).The substance is an easy to use powder containing hydrogen peroxide; when added to fish ponds hydrogen peroxide gets dissolved and subsequently decomposed into oxygen and water. This article presents the results from measurements in January 2017 in connection with practical application at an organic fish. The study showed that SPC leads to an evenly distribution of hydrogen peroxide in the water and maintained for a few hours. The water treatment causes oxygen liberation at the same time but also a significant pH increase which has to be taken into account for optimal management. Tipo: Journal paper Palavras-chave: Production systems; Health and welfare; Aquaculture. Ano: 2017 URL: http://orgprints.org/31443/1/The%20pros%20and%20cons%20of%20sodium%20percarbonate%20%20Global%20Aquaculture%20Advocate.pdf Peracetic Acid Products Expand Sanitizing, Organic Water Treatment Options Organic Eprints Pedersen, Lars-Flemming; Jokumsen, Alfred; Larsen, Villy J.; Henriksen, Niels Henrik. Peracetic acids can be used as sanitizers to control water quality in aquaculture systems. As an alternative to formalin, chloramine-T or copper sulphate, PAA has strong anti-microbial effects, degrades quickly and is relatively safe to use. Its mode of action and associated rapid decay can make optimizing treatment protocols a challenge. Continuous low-dose applications seem to be a promising solution. PAA is among the few disinfectants approved for organic aquaculture Tipo: Journal paper Palavras-chave: Air and water emissions; Health and welfare; Regulation. Ano: 2015 URL: http://orgprints.org/28653/7/28653.pdf Registros recuperados: 16 Primeira ... 1 ... Última

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