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	Provedor de dados Organic Eprints (63) Autor Jokumsen, Alfred (63) Lund, Ivar (13) Gesto, Manuel (9) Pedersen, Lars-Flemming (9) Larsen, Villy J. (7) Madsen, Lone (6) Henriksen, Niels Henrik (4) Jacobsen, Charlotte (4) Nielsen, Henrik Hauch (4) Baron, Caroline (3) Dalsgaard, Johanne (3) Hyldig, Grethe (3) Larsen, Erling P. (3) Nielsen, Max (3) Skov, Peter V. (3) Green-Pedersen, Ditte (2) Holm, Jørgen (2) Larsen, Bodil (2) Larsen, Villy Juul (2) Lazado, Carlo C. (2) Mais... Palavra-chave Health and welfare (29) Feeding and growth (18) Aquaculture (12) Food security (10) Production systems (7) Breeding and genetics (6) Farm nutrient management (6) Research methodology and philosophy (5) "Organics" in general (4) Regulation (4) Consumer issues (3) Denmark (3) Farm economics (3) Food quality and human health (3) Education (2) Extension and communication (2) Extension and communication Denmark Farm nutrient management (2) Food quality and human health Produce chain management (2) Markets and trade (2) Air and water emissions (1) Mais... Tipo do documento Newspaper or magazine article (21) Journal paper (15) Conference paper, poster, etc. (13) Report (9) Other (3) Web product (2) Mais... Ano 2019 (5) 2018 (8) 2017 (6) 2016 (3) 2015 (9) 2014 (5) 2012 (1) 2011 (6) 2010 (8) 2009 (3) 2008 (6) 2006 (3) Mais... País Germany (63) Idioma Inglês (27) dan (15) da (5) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 63 Primeira ... 1 2 3 4 ... Última Emergence time and skin melanin spot patterns do not correlate with growth performance, social competitive ability or stress response in farmed rainbow trout Organic Eprints Gesto, Manuel; Skov, Peter V.; Jokumsen, Alfred. In wild salmonid fish, specific individual behavioral traits have been correlated with the timing of fry emergence from their gravel spawning nests; Early emerging fish display more aggressive behavior and have a higher probability of becoming socially dominant, compared to fish that emerge at a later stage. Apart from aggression and dominance, other behavioral and metabolic traits, such as boldness, metabolic rate, or growth, have also been linked to emergence time. Altogether, the traits of early- and late-emerging fish resemble those of the proactive and reactive stress-coping style, respectively. As proactive fish are considered more resilient to stress, it may be desirable to select these for aquaculture production. However, it is currently unclear to... Tipo: Journal paper Palavras-chave: Production systems; Breeding and genetics; Health and welfare; Aquaculture. Ano: 2017 URL: http://orgprints.org/31479/1/Gesto%20et%20al.%202017_Emergence%20Time%20and%20Skin%20Melanin_Frontiers%20in%20Neuroscience.pdf 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 Boom in Production of Organic Line Mussels in Denmark Organic Eprints Jokumsen, Alfred. Organic farming of line mussels makes a significant footprint in the development of the Danish Aquaculture sector, targeting 10 percent of the production being organic by 2018. Currently nine production units have been approved for a total production of some 3,500 t/yr. Danish production of line mussels takes place in the Limfjorden (North West Jutland), where the main producer currently is Seafood Limfjord in cooperation with the mussel processing company Vildsund Blue in Nykøbing Mors. Mussels are farmed on lines and in big socks and, because they are reared closer to the surface than wild mussels, more algae and other seston is available to support growth. Naturally occurring mussel spat settle on the lines each year and harvesting is done by boat.... Tipo: Newspaper or magazine article Palavras-chave: Aquaculture. Ano: 2015 URL: http://orgprints.org/29436/1/World%20Aquaculture_September%202015%20Jokumsen.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 Robust fiskeyngel en nødvendighed Organic Eprints Jokumsen, Alfred. RobustFish vil styrke udviklingen af økologisk ørred produktion i Danmark. Ifølge EU regelsættet for økologisk akvakultur skal den økologiske fiskeproduktion udelukkende være baseret på økologisk yngel fra 2016. Da medicinbehandling af økologisk ørred er uønsket og kun er tilladt i stærkt begrænset omfang, er ynglens robusthed overfor bl.a. den alvorligste yngelsygdom i dansk ørredopdræt, YDS (”yngeldødeligheds-syndrom”), særdeles vigtig. Ynglens robusthed vil blive målt i forhold til ynglens swim-up adfærd (first feeding) og performance under opvæksten. Indholdet af specifikke essentielle Ω-3 fedtsyrer i foderet til ynglen er særlig vigtig for fiskens vækst, sundhed og velfærd, herunder robusthed overfor stress. Dette skal undersøges ved stress tests samt... Tipo: Newspaper or magazine article Palavras-chave: "Organics" in general; Breeding and genetics; Health and welfare. Ano: 2014 URL: http://orgprints.org/28124/3/28124.pdf Organic vegetable proteins and oil in feed for organic rainbow trout (Oncorhynchus mykiss) Organic Eprints Lund, Ivar; Dalsgaard, Johanne; Larsen, Bodil; Jokumsen, Alfred. Fish meal may be partly replaced by a matrix of organic horse bean, pea and rape, and flax seed oil may replace fish oil in diets for organic rainbow trout without compromising growth performance and feed utilization. Tipo: Conference paper, poster, etc. Palavras-chave: Feeding and growth Recycling; Balancing and resource management Farm nutrient management Quality and evaluation of inputs. Ano: 2010 URL: http://orgprints.org/18481/1/18481.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 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 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 Costs and benefits of farming fish with selected behavioural and physiological traits Organic Eprints Skov, Peter Vilhelm; Gregersen, Joao de Jesus; Jokumsen, Alfred. The timing with which salmonid larvae emerge from their gravel nests is considered to be associated with a particular suite of behavioural and physiological traits. In aquaculture, traits of interest to production include aggressiveness, dominance and resilience to stress. The earliest emerging fraction is generally considered to possess these traits, and fish in this fraction may be perceived as being more robust. It is speculated that there may be advantages to selectively farm fish that are more robust, particularly if feed utilization is improved and disease is less prevalent. In the present study a series of experiments were performed, with the purpose of characterising behavioural, metabolic and production related traits in rainbow trout juveniles.... Tipo: Conference paper, poster, etc. Palavras-chave: Feeding and growth; Health and welfare. Ano: 2015 URL: http://orgprints.org/29294/7/29294.pdf Vidensyntese om økologisk fiskeopdræt Organic Eprints Jokumsen, Alfred. Økologisk fiskeopdræt er en produktionsform med fokus på dyrevelfærd, miljø, fødevaresikkerhed og bæredygtighed. Produktionen tilgodeser fx fiskenes krav til gunstige iltforhold, ligesom der tages hensyn til faunaen i det omgivende vandløb (recipienten). Fiskene må højest behandles med antibiotika én gang i deres levetid og det tilsigtes at begrænse ressourceforbruget under hensyn til naturens kredsløb. I forbindelse med projektet er der udført en vidensyntese, der går mere i dybden med problemstillingerne indenfor økologisk fiskeopdræt såvel nationalt som internationalt og i europæisk perspektiv. Herunder en nærmere belysning og sammenligning af problemstillinger i forhold til regelsættene for økologisk opdræt i en række lande i Europa. Tipo: Journal paper Palavras-chave: Food security; Food quality and human health "Organics" in general Health and welfare. Ano: 2006 URL: http://orgprints.org/13899/1/13899.pdf Digestibility in selected rainbow trout families and modelling of growth from the specific intake of digestible protein Organic Eprints Rasmussen, Richard; Jokumsen, Alfred. The experiments aimed to clarify variations in digestibility of dietary nutrients in rainbow trout. Furthermore, the objective was to study how differences in digestibility might be related to growth and feed utilisation at various growth rates. When comparing the results from the experiments it appeared that particularly protein digestibility was closely related to specific growth rate and feed conversion ratio at high growth rates. As a tool to visualise the relationship between protein digestibility and growth of rainbow trout a growth model was developed based on the specific intake of digestible protein, and general assumptions on protein content and protein retention efficiency in rainbow trout. The model indicated that increased protein... Tipo: Journal paper Palavras-chave: Technology assessment; Feeding and growth; Nutrient turnover; Research methodology and philosophy; Farm nutrient management. Ano: 2008 URL: http://orgprints.org/18750/1/18750.pdf Boom in production of organic line mussels in Denmark Organic Eprints Jokumsen, Alfred. Organic farming of line mussels makes a significant foot print in the development of the Danish Aquaculture sector targeting 10 % of the production being organic by 2018. Currently 9 production units have been approved for a total production of some 3,500 tons/year. In particular the Danish production of line mussels is taken place in the ”Limfjorden” (North West Jutland), where the main producer currently is Seafood Limfjord in cooperation with the mussel processing company Vildsund Blue in Nykøbing Mors. The line mussels are farmed on lines and in big socks, and due to the fact that they are reared higher in the water column than wild mussels more feed is available for their growth. The natural occurring mussel fry is settling on the lines each year, and... Tipo: Newspaper or magazine article Palavras-chave: Aquaculture. Ano: 2015 URL: http://orgprints.org/29437/7/Aquaculture%20Europe_March-April_2015.pdf Denmark – European champion in organic rainbow trout Organic Eprints Larsen, Erling P.; Nielsen, Max; Larsen, Villy J.; Jokumsen, Alfred. In 2014 Denmark was the biggest producer of organic rainbow trout in Europe with a total amount of 1,080 tons. The producers of the organic trout had a better economic earning than the conventional producers, measured per unit produced. The value wason average 8 % higher per unit than for the conventional producers. The solvency ratio was in 2012 an average of 28 %, which was higher than the traditional trout producers’ solvency ratio (solvency ratio measure an enterprises ability to meet its debt and other obligations). The Danish producers and processing industry are now in the front on the organic trout market. The Danish producers of organic trout are now able to keep a constant supply throughout the year. The variety of products has been increased... Tipo: Newspaper or magazine article Palavras-chave: Farm economics. Ano: 2016 URL: http://orgprints.org/29695/1/Denmark%20%E2%80%93%20European%20Champion%20in%20Organic%20Rainbow%20Trout.pdf Manipulation of dietary fatty acids and effects on rainbow trout fry performance Organic Eprints Lund, Ivar; Lazado, Carlo C.; Jokumsen, Alfred. The Organic Regulation of fish farming states strong limitations on the sourcing of protein and fat (oil) ingredients in organic feed, i.e. aiming to phase out fishmeal (FM) and fish oil (FO) obtained from wild fish stocks and this may lead to a higher inclusion of other ingredients, especially of vegetable origin including proteins i.e. soybean; wheat; corn; barley; cottonseed; canola and peas, and oils i.e.: soybean; canola; linseed; sunflower; palm oil a.o. (Gatlin et al., 2007). A complete substitution of (FM) by vegetable protein alternatives may, however, lead to reduced performance in salmonids. Nutritional deficiencies and lack of essential amino acids; high dietary levels of antinutrients/ carbohydrates are typical factors leading to lower feed... Tipo: Report Palavras-chave: Feeding and growth; Health and welfare. Ano: 2018 URL: http://orgprints.org/33386/1/D3.1.2.docx Proteinafgrøder til økologiske regnbueørreder (Oncorhynchus mykiss) Organic Eprints Jokumsen, Alfred. Der var signifikant forskel i fordøjeligheden af kulhydrat mellem diæterne A til D, undtagen mellem diæterne C og D og af fosfor mellem diæterne A og D. Substitutionen af fiskemel med en matrix af hestebønner, ærter og raps i forholdet 1:1:0,7 og af fiskeolie med hørfrøolie havde ingen signifikant effekt på tilvækst og foderudnyttelse samt på fordøjeligheden af protein og fedt. Tipo: Conference paper, poster, etc. Palavras-chave: Feeding and growth Education; Extension and communication Research methodology and philosophy Denmark Farm nutrient management. Ano: 2009 URL: http://orgprints.org/18482/1/18482.pdf Økologisk fiskeopdræt. Rapport fra en vidensyntese om udviklingsmuligheder inden for økologisk fiskeopdræt i Danmark Organic Eprints Jokumsen, Alfred; Larsen, Villy J.; Dalsgaard, Inger; Nielsen, Henrik Hauch; Jessen, Peter; Kold, John. Dansk Akvakultur's målsætning for udviklingen inden for økologisk fiskeopdræt frem mod år 2015 er, at 1. Mindst 10% (10.000 tons) af produktionen skal være økologisk 2. Eksportandelen heraf skal være på mindst 50% 3. Der opdrættes mindst tre forskellige økologiske arter 4. Den samlede forskningsindsats i økologi er på mindst 3% af primæromsætningen 5. Senest i 2007 er der etableret et fælles europæisk regelsæt 6. Danmark er EU's førende producent af økologisk fiskefoder Formålet med denne vidensyntese er at identificere de væsentligste indsatsområder af betydning for den målsatte udvikling af økologisk fiskeopdræt i Danmark, herunder en sammenfatning af den eksisterende viden om økologisk fiskeopdræt såvel nationalt som i det øvrige Europa.... Tipo: Report Palavras-chave: Farm nutrient management; Denmark. Ano: 2006 URL: http://orgprints.org/13511/1/13511.pdf Parasitter spænder ben for økologisk ørredproduktion Organic Eprints Jokumsen, Alfred. Opdræt af regnbueørred, især økologisk ørred, er kritisk udfordret på grund af relativt mange hud/gælle infektioner forårsaget af forskellige patogener, især parasitten Costia (Ichthyobodo necator), som ultimativt er dødelig for yngel/mindre fisk. Dette kan være en trussel mod tilstrækkelig udbud af økologisk yngel til videre produktion, da regelsættet for økologisk akvakultur kræver 100% økologisk yngel. Endvidere forårsager en såkaldt ny ”Rickettsia-lignende" bakterie “rødpletsyge” (RMS), dvs. røde pletter i huden, som medfører ned-klassificering/kassation af op til 30% af fiskene ved slagtning. Behandling ved brug af antibiotika/hjælpestoffer er kun muligt i begrænset omfang i økologisk ørred produktion. Løsninger til forebyggelse og/eller behandling af... Tipo: Web product Palavras-chave: Aquaculture. Ano: 2019 URL: http://orgprints.org/35557/1/Parasitter%20sp%C3%A6nder%20ben%20for%20%C3%B8kologisk%20%C3%B8rredproduktion.pdf Stress and disease resilience differences related to emergence time for first feeding in farmed rainbow trout (Oncorhynchus mykiss) Organic Eprints Gesto, Manuel; Madsen, Lone; Andersen, Nikolaj R.; Jokumsen, Alfred. Salmonid individuals show a relatively high variability in the time required to abandon the gravel nest where they hatch, the so-called "emergence time". Different behavioral and physiological traits have been shown to be associated to that emergence time in wild salmonids. In general, early- and late-emerging fish have traits resembling those of proactive and reactive stress coping styles, respectively. Proactive fish are considered to be more resilient to stress and probably to disease, so it was hypothesized that fish with different emergence time have different ability to resist repeated episodes of stress without suffering deleterious effects on their welfare or health status. In this study, rainbow trout eyed eggs were hatched and larvae were... Tipo: Journal paper Palavras-chave: Health and welfare. Ano: 2018 URL: http://orgprints.org/32863/1/Gesto%20et%20al_Stress%20and%20disease%20resilience%20differences%20related%20to%20emergence%20time%20for%20first%20feeding%20in%201%20farmed%20rainbow%20trout%20%28Oncorhynchus%20mykiss%29manuscript_JEB_2018.pdf Fodringsforsøg på Skravad Mølle Dambrug: Vækst og foderudnyttelse hos økologiske regnbueørreder fodret med 2 typer fiskefoder til økologisk opdræt Organic Eprints Jokumsen, Alfred; Larsen, Villy Juul. Et fodringsforsøg blev udført på Skravad Mølle Dambrug, Møldrup, Denmark. Formålet var at undersøge 2 forsøgsfodertyper under kommersielle forhold på økologiske dambrug. Med de 2 diæter undersøgtes effekten af at reducere inklusionen af fiskekmel fra 59% til 35% på vækst og sundhedstilstand hos økologiske regnbueørreder under kommersiel produktion. Mens kontrol diæten kun indeholdt fiskemel og fiskeolie som protein og oliekilde var fiskemelsandelen reduceret fra 59 til 35 % og erstattet med en matrix af hestebønner, ærter og raps i forholdet 1:1:0.7). Førsøget viste en 10 % reduktion i vækst og foderkonvertering hos fisk fodret med forsøgsdiæten, hvor fiskemelet var delvist erstatet med planteprotein i sammenligning med kontroldiæten. Resultaterne skal... Tipo: Report Palavras-chave: Education; Extension and communication Denmark Farm nutrient management. Ano: 2010 URL: http://orgprints.org/18213/1/18213.pdf Registros recuperados: 63 Primeira ... 1 2 3 4 ... Última

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