DK177873B1 - System and method for removing parasites on fish - Google Patents
System and method for removing parasites on fish Download PDFInfo
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- DK177873B1 DK177873B1 DK201370541A DKPA201370541A DK177873B1 DK 177873 B1 DK177873 B1 DK 177873B1 DK 201370541 A DK201370541 A DK 201370541A DK PA201370541 A DKPA201370541 A DK PA201370541A DK 177873 B1 DK177873 B1 DK 177873B1
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- 241000251468 Actinopterygii Species 0.000 title claims abstract description 182
- 244000045947 parasite Species 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 230000003071 parasitic effect Effects 0.000 claims description 2
- 230000008685 targeting Effects 0.000 claims 1
- 235000019688 fish Nutrition 0.000 description 150
- 241000972773 Aulopiformes Species 0.000 description 34
- 235000019515 salmon Nutrition 0.000 description 34
- 241001674048 Phthiraptera Species 0.000 description 25
- 230000000694 effects Effects 0.000 description 4
- 150000002978 peroxides Chemical class 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009360 aquaculture Methods 0.000 description 3
- 244000144974 aquaculture Species 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 210000004712 air sac Anatomy 0.000 description 1
- 239000010796 biological waste Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
- A01K61/13—Prevention or treatment of fish diseases
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
Den foreliggende opfindelse angår System og en metode til fjernelse af fiskeparasitter, hvilket system omfatter et pumpesystem, hvilket pumpesystem pumper fisk fra et først volumen til et andet volumen, hvor systemet er udformet med et antal dyser, hvilke dyser retter vandstråler mod fiskene. Det er opfindelsens formål at fjerne fiskeparasitter på en effektiv, hurtig og skånsom metode. Dette kan opnås med mindst et sugerør, gennem hvilket sugerør suges en første vandstrøm opad sammen med fisk fra det første fiskevolumen, hvilket sugerør er udformet med et antal dyser, hvilke dyser retter helt eller delvis tværgående vanstrømme mod fisk der passerer gennem sugerøret, hvor pumpesystemet afleverer tilnærmelsesvis parasitfri fisk i det andet fiskevolumen. Herved kan det opnås, af samtidigt med at fiskene renses for parasitter flyttes fiskene fra et første volumen, hvor man må forvente at relativ mange fisk er generet af parasitter. Disse fisk vil efter fjernelse af parasitter blive flyttet over i et andet fiskevolumen, hvor man kan forvente, at antallet af parasitter er stærkt begrænset.The present invention relates to a system and a method for removing fish parasites, which system comprises a pumping system, which pumping system pumps fish from a first volume to a second volume, the system being formed with a number of nozzles, which nozzles direct water jets at the fish. It is the object of the invention to remove fish parasites in an efficient, fast and gentle method. This can be achieved with at least one suction pipe, through which suction pipe a first water flow is sucked upwards together with fish from the first fish volume, which suction pipe is formed with a number of nozzles, which nozzles direct wholly or partly transverse undercurrents towards fish passing through the suction pipe delivers approximately parasite-free fish in the second fish volume. This can be achieved by moving the fish from the first volume at the same time as the fish are cleaned of parasites, where one must expect that relatively many fish are bothered by parasites. After removal of parasites, these fish will be moved to another fish volume, where the number of parasites can be expected to be severely limited.
Description
i DK 177873 B1in DK 177873 B1
System og metode til fjernelse af parasitter på fisk Opfindelsens områdeSystem and method for removing parasites on fish Field of the Invention
Den foreliggende opfindelse angår et system og en metode til fjernelse af fiskeparasitter, hvilket system omfatter mindst et første vandfyldt afgrænset fiskevolumen, hvilket 5 første fiskevolumen indeholder fisk med parasitter, hvilket system omfatter mindst et andet afgrænset vandfyldt fiskevolumen, hvilket andet fiskevolumen indeholder tilnærmelsesvis parasitfri fisk, hvilket system omfatter et pumpesystem, hvilket pumpesystem pumper fisk fra det først volumen til det andet volumen, hvor systemet er udformet med et antal dyser, hvilke dyser retter vandstråler mod fiskene.The present invention relates to a system and method for removing fish parasites, which system comprises at least a first water-filled delimited fish volume, which first fish volume contains fish with parasites, which system comprises at least a second delimited water-filled fish volume, which second fish volume contains substantially parasite-free fish said system comprising a pumping system, said pumping system pumping fish from the first volume to the second volume, said system being formed with a plurality of nozzles directing water jets at the fish.
1010
Opfindelsens baggrund WO 9824304 beskriver en metode til at fjerne parasitter fra fisk, specielt fjernelse af lakselus. I forbindelse med en snæver strømningskanal, hvor der foregår en væskestrømning, rammes fiskén når den passerer en væskestrøm, der er generet af forskelli-15 ge dyser rettet mod fiskene. Alle disse dyser er forbundet til en vandpumpe. Dannelse af tværgående vandstrømme mod fiskens krop vil fjerne størsteparten af de parasitter, der er klæbet fast til fisken, herunder lakselus. I WO 9824304 beskrives således at fiskene transporteres nedad gennem en strømningskanal, mens fiskene på vej nedad rammes af vandstråler fra en tværgående retning. Det betyder, at fiskene gennem pas-20 sagé af røret udsættes for gradvis stigende omgivelsestryk.BACKGROUND OF THE INVENTION WO 9824304 discloses a method for removing parasites from fish, especially the removal of salmon lice. In conjunction with a narrow flow channel where a fluid flow takes place, the fish is hit as it passes a fluid flow generated by various nozzles directed at the fish. All of these nozzles are connected to a water pump. Forming transverse streams of water to the fish's body will remove most of the parasites that are stuck to the fish, including salmon lice. WO 9824304 discloses that the fish are transported downwards through a flow channel, while the fish on the way downwards are hit by water jets from a transverse direction. This means that the fish, through the passage saga of the tube, are subjected to gradually increasing ambient pressure.
Opfindelsens formålThe object of the invention
Det er opfindelsens formål at fjerne fiskeparasitter på en effektiv, hurtig og skånsom metode. Et andet formål med opfindelsen er at undgå brug af kemikalier til bekæmpelse af fiskeparasitter. Et tredje formål er af ^ emel s af parasitter fortages ved flytning 25 fra et første fiskevolumen til et andet fiskevolumen.It is the object of the invention to remove fish parasites by an efficient, fast and gentle method. Another object of the invention is to avoid the use of chemicals to control fish parasites. A third object is the removal of parasites by movement 25 from a first fish volume to a second fish volume.
Beskrivelse af opfindelsenDescription of the Invention
Formålet kan opnås med et system som beskrevet i indledningen modificeres ved at pumpesystemet er udformet med mindst et sugerør, gennem hvilket sugerør suges en 30 første vandstrøm opad sammen med fisk fra det første fiskevolumen, hvilket sugerør er udformet med et antal dyser, hvilke dyser retter helt eller delvis tværgående van- 2 DK 177873 B1 strømme mod fisk der passerer gennem sugerøret, hvor pumpesystemet afleverer tilnærmelsesvis parasit fri fisk i det andet fiskevolumén.The object can be achieved with a system as described in the introduction modified by the pumping system being designed with at least one suction pipe, through which suction pipe is sucked up a first stream of water upwards together with fish from the first fish volume, which suction pipe is formed with a number of nozzles which direct nozzles. flow completely or partly transversely to fish passing through the suction pipe, where the pumping system delivers approximately parasite free fish in the second volume of fish.
Herved kan det opnås, at samtidigt med at fiskene renses for parasitter flyttes fiskene 5 fra et første volumen, hvor man må forvente at relativ mange fisk er generet af parasitter. Disse fisk vil efter fjernelse af parasitter blive flyttet over i et andet fiskevolumen, hvor man kan forvente, at antallet af parasitter er stærkt begrænset. På den måde sker en afrensning af parasitter på fisk på en meget effektiv måde, uden at der til fjernelse af parasitter anvendes giftige kemikalier eller peroxid eller anden kemi, som også er 10 farlig for fisk. Netop fordi afrensning af parasitter sker i forbindelse med en i forvejen sikkert nødvendig flytning af fisk fra et fiskevolumen til et andet, så vil energiforbruget ved denne opfindelse være minimalt. Merforbrug af energi begrænses til pumper, der skal drive de vandstrømme, der fra tværretning rettes mod fiskene. Netop den fuldstændig kemikalie fri afrensning af parasitter, såsom fx lakselus kan have stor 15 betydning for laksenes trivsel i ethvert havdambrug. Netop brug af kemikalier har vist sig yderst uheldigt i forbindelse med opdræt aflaks, fordi lakselusene i løbet af relativt kort årrække bliver resistente over for de gifttyper, der anvendes. Derfor har hele lakseindustrien følt sig tvunget til at gå over til at anvende peroxid til fjernelse af lakselus. Peroxid er imidlertid så farlig at anvende for fiskene, at man må regne med en 20 vis procent af laks, der dør ved denne proces. Derfor løser denne patentansøgning det ganske væsentlige problem der kan være i forbindelse med dambrug eller for den sags skyld havdambrug, hvor fiskene går så tæt sammen, så antallet af parasitter øges væsentligt på de enkelte fisk.Hereby it can be achieved that while the fish are cleansed of parasites, the fish 5 is moved from a first volume, where one must expect that a relatively large number of fish are bothered by parasites. After removal of parasites, these fish will be transferred to another fish volume, where the number of parasites can be expected to be severely limited. In this way, the cleaning of parasites on fish takes place in a very effective way, without the use of toxic chemicals or peroxide or other chemicals which are also dangerous to fish, for the removal of parasites. Precisely because purification of parasites occurs in connection with a previously necessary movement of fish from one volume of fish to another, the energy consumption of this invention will be minimal. Excess consumption of energy is limited to pumps that are intended to drive the water flows that are directed from the fish to the fish. Precisely the complete chemical-free purification of parasites, such as, for example, salmon lice can have a great impact on the well-being of salmon in any aquaculture industry. Exactly the use of chemicals has proved extremely unfortunate in connection with breeding salmon, because in a relatively short number of years salmon lice become resistant to the poison types used. Therefore, the entire salmon industry has felt compelled to switch to using peroxide to remove salmon lice. However, peroxide is so dangerous to use for the fish that one has to count on a certain 20 percent of salmon that die during this process. Therefore, this patent application solves the very significant problem that may be associated with aquaculture or, for that matter, aquaculture, where the fish are so close together that the number of parasites increases significantly on the individual fish.
2525
Ved en alternativ udførelsesform for opfindelsen kan sugerørets dyser være placeret i forbindelse med pumpesystemets indløb. Herved opnås at dyserne er placeret i et område af sugerøret, hvor omgivelsestrykket er relativt lavt. Herved kan man udnytte, at mange parasitter, herunder lakselus, anvender et sugekop-princip til fastgørelse på 30 fiskenes skæl. Ved at foretage en reduktion af omgivelsestrykket inde i et rør sammen med en væskestrøm, vil man opnå en reduktion af den fastholdte kraft, som parasitterne udviser. Specielt lakselus viser sig næsten at miste deres fastholdekraft, når trykket svagt ændres omkring fisken. Hvis fisken samtidigt rammes af tværgående vandstrømme, så vil lakselusene, idet de kun har svag fastholdekraft tilbage, let kunne 3 DK 177873 B1 skylles af fisken. Samme forhold vil sandsynligvis gælde for en lang række andre fiskeparasitter.In an alternative embodiment of the invention, the nozzles of the suction pipe may be located in connection with the pump system inlet. This results in the nozzles being located in an area of the suction pipe where the ambient pressure is relatively low. This can be utilized by many parasites, including salmon lice, using a suction cup principle to attach to the bark of 30 fish. By reducing the ambient pressure inside a tube together with a fluid flow, a reduction in the retained force exhibited by the parasites will be achieved. Salmon lice in particular appear to lose their tenacity when the pressure changes slightly around the fish. If the fish are simultaneously affected by transverse streams of water, then the salmon lice, having only weak retaining power left, could easily be flushed by the fish. The same conditions are likely to apply to a large number of other fish parasites.
Ved en yderligere alternativ udførelsesform for opfindelsen kan systemet indeholde 5 mindst et filter til opsamling af parasitter, hvilket filter gennemløbes af returvand fra den første vandstrøm efter passage af pumpesystemet og inden returstrømning til omgivende vandløb. Ved at fjerne lakselusene fra returvandet fra selve processen undgår man, at lakselusene blot gentager deres tidligere funktion, idet returvandet sandsynligvis slippes ud i nærheden af fx de laksebure, hvor laksene går iforvejen. Derved vil 10 lakselusene blot udsøge sig andre laks, og processen kan i princippet starte forfra. Det er derfor nødvendigt, at lakselusene fjernes fra returvandet, og dette lader sig gøre ved hjælp af en filtrering. Lakselusene kan herefter bortskaffes som andet biologisk affald. Måske kan de døde lakselus direkte anvendes som foder.In a further alternative embodiment of the invention, the system may include at least one filter for collecting parasites, which filter is passed through return water from the first stream of water after passage of the pump system and prior to return flow to surrounding streams. By removing the salmon lice from the return water from the process itself, it is avoided that the salmon lice simply repeats their previous function, since the return water is probably released near, for example, the salmon cages where the salmon advance. As a result, the 10 salmon lice will simply seek out other salmon, and the process can in principle start again. Therefore, it is necessary to remove the salmon lice from the return water, and this can be done by filtration. The salmon lice can then be disposed of as other biological waste. Perhaps the dead salmon lice can be used directly as feed.
15 Ved en yderligere alternativ udførelsesform for opfindelsen kan sugerøret indeholde mindst en indsnævring af sugerørets tværsnit for dannelse af en venturi, hvor venturi-en indeholder dyser som genererer helt eller delvis tværgående vand strømninger rettet mod fisk som passerer gennem venturien. Ved at udforme sugerøret med en indsnævring opnås en venturi effekt, idet vandets strømningshastighed vil øges gennem ventu-20 rien og derved opstår et lavere omgivelsestryk. Derfor kan der, hvis dér findes en venturi nær indløbet til et pumpesystem opnås en bedre effekt. Imidlertid skal en ændring af omgivelsestrykket holdes på et niveau, så fisken, som har svømmeblærer, ikke stresses unødvendigt ved et pludseligt trykfald. Derfor skal venturi-systemet udformes således, at reduktionen i trykket sandsynligvis kun er fa millibar.In a further alternative embodiment of the invention, the suction tube may contain at least one narrowing of the suction tube cross-section to form a venturi, the venturi containing nozzles generating full or partial transverse water flows directed to fish passing through the venturi. By designing the suction pipe with a constriction, a venturi effect is obtained, as the flow rate of the water will increase through the venturi, thereby creating a lower ambient pressure. Therefore, if there is a venturi near the inlet of a pump system, a better effect can be obtained. However, a change in ambient pressure must be kept at a level so that the fish that has swim bladders is not unnecessarily stressed by a sudden drop in pressure. Therefore, the venturi system must be designed such that the reduction in pressure is probably only few millibars.
2525
Ved en yderligere alternativ udførelsesform for opfindelsen kan sugerøret indeholde flere venturi indsnævringer, hvilke venturier er forsynet med dyser for etablering af ° tværgående vandstrømme. Ved at forsyne sugerøret med flere venturier med dyser, kan man i princippet lade fisk gennemgå flere behandlingstrin umiddelbart efter hin-30 anden, mens fiskene passerer et sugerør, hvor fiskene skal suges op for transport fra et fiskevolumen til et andet. Ved at gennemføre en behandling flere gange, vil man sandsynligvis kunne fjerne størsteparten af forskellige parasitten der suger sig fast på fisk. Selv hårdnakkede lakselus vil i den gentagende behandling blive stresset og automatisk næsten give slip, hvorefter de tværgående vandstråler fjerner lakselusene fra lak- 4 DK 177873 B1 sen, og på grund af den hurtige strømning, der måske er i sugerøret, far lakselusene dårlig mulighed for igen at suge sig fast, før laksen er jernet fra vandstrømmen og sendt retur til det andet fiskevolumen. Ved den gentagende behandling kan der sandsynligvis ske en 100% fjernelse af parasitter.In a further alternative embodiment of the invention, the suction tube may contain several venturi constrictions which are provided with nozzles for establishing transverse water flows. By providing the suction pipe with several venturis with nozzles, it is in principle possible for fish to go through several processing steps immediately after the other, while the fish pass through a suction pipe where the fish must be sucked up for transport from one volume of fish to another. By performing a treatment several times, you will probably be able to remove most of the various parasites that get caught on fish. Even stubborn salmon lice in the repetitive treatment will be stressed and automatically almost let go, after which the transverse water jets will remove the salmon lice from the salmon, and due to the rapid flow that may be in the suction tube, the salmon lice will have little opportunity to again to suck themselves up before the salmon is ironed from the water stream and sent back to the second fish volume. With the repetitive treatment, a 100% removal of parasites can probably occur.
55
Opfindelsen omhandler ligeledes en metode til helt eller delvis fjernelse af parasitter fra fisk ved hjælp af et system som beskrevet i teksten herover, hvor metoden mindst kan omfatte følgende sekvens afhandlinger: 10 a: etabler en første vandstrøm gennem mindst et sugerør fra et først fiskevolumen gennem et pumpesystem, b: reducer vandets omgivelsestryk i sugerøret, 15 c: etabler tværgående vandstråler i sugerøret ved hjælp af dyser, d: foretag en separering af parasitffi fisk fra den første etablerede vandstrøm, e: fortag flytning a separerede fisk til et andet fiskevolumen, 20 f: foretag filtrering af den første vandstrøm for udskillelse af parasitter.The invention also relates to a method for completely or partially removing parasites from fish using a system as described in the text above, wherein the method may comprise at least the following sequence of theses: 10 a: establish a first stream of water through at least one straw from a first volume of fish through a pumping system, b: reduce the ambient pressure of the water in the suction pipe, 15 c: establish transverse jets of water in the suction pipe by means of nozzles, d: make a separation of parasitic fish from the first established water stream, e: continue moving a separated fish to a second fish volume, 20 f: filter the first stream of water to excrete parasites.
Metoden kan udføres, hvis der anvendes en fiskepumpe, fx produceret af Inventive Marine Products under navnet CanaVac. Denne pumpe vil typisk skulle drives af en 25 Samson ringpumpe, som må betegnes som en almindelig kendt vakuumpumpe. Herved bliver det muligt at suge fisk op fra relativ stor dybde og føre fiskene gennem fx én eller flere venturier således, at tværgående vandstrømme fjerner størsteparten af fiskenes parasitter. Ved at lede det opsugede vand retur gennem et filter til fjernelse af parasitterne og sende fiskene over i et andet fiskevolumen, hvor størsteparten af para-30 sitteme er fjernet, fjernes størsteparten af parasitter inden fiskene kommer i det andet volumen. Ved hjælp af opfindelsen er det således muligt at fjerne størsteparten af parasitter, herunder lakselus, på en meget skånsom måde, helt uden brug af kemikalier. Ved at bruge CanaVac fiskepumpen kan transport af fisk ske gennem systemet på en meget blid og human måde, hvor der stort set ikke forekommer skade på fisk. Hvis 5 DK 177873 B1 opfindelsen anvendes samtidigt med, at fisk alligevel skal flyttes fra et fiskevolumen til et andet, vil fjernelse af parasitter, herunder lakselus, kunne ske ved et meget meget lavt energiforbrug, fordi den eneste ekstra udfordring der kommer, bliver dannelse af tilstrækkeligt vandtryk til at generere tværgående strømning gennem dyserne. Hermed 5 opnår man en væsentlig billigere og samtidig mere effektiv fjernelse af parasitter, end det man traditionelt gør ved anvendelse af peroxid.The method can be performed if a fish pump is used, for example, produced by Inventive Marine Products under the name CanaVac. This pump will typically have to be operated by a 25 Samson ring pump, which must be referred to as a commonly known vacuum pump. This makes it possible to soak up fish from relatively great depth and pass the fish through, for example, one or more venturi, so that transverse water flows remove most of the parasites of the fish. By passing the aspirated water back through a filter to remove the parasites and sending the fish into another fish volume, where most of the parasites are removed, most of the parasites are removed before the fish enter the second volume. Thus, by means of the invention, it is possible to remove most of the parasites, including salmon lice, in a very gentle manner, without the use of chemicals. By using the CanaVac fish pump, transport of fish can be done through the system in a very gentle and humane way, where there is virtually no harm to fish. If the invention is used at the same time that fish are nevertheless to be moved from one fish volume to another, the removal of parasites, including salmon lice, could occur at a very very low energy consumption, because the only additional challenge that comes will be the formation of sufficient water pressure to generate transverse flow through the nozzles. This results in significantly cheaper and more efficient removal of parasites than is traditionally done with the use of peroxide.
Fordi fjernelse af parasitterne sker i en opadgående strømning fra et fiskevolumen, vil der være et faldende omgivelsestryk i sugerøret, som yderligere kan forstærkes ved 10 anvendelse af venturi, hvorved alle parasitter, som fastholdes til fisk ved hjælp af sugekop-princip, enten far reduceret fastholdekraften eller fastholdekrafiten forsvinder helt. Parasitter vil normalt være i stand til at tilpasse deres sugeevne i takt med, at fisken skifter højde i vand, men ved den relativ hurtige tfykændring kan parasitterne ikke nå at øge deres sug og vil dermed næsten falde af uden yderligere behandling.Because the parasites are removed in an upward flow from a fish volume, there will be a decreasing ambient pressure in the straw which can be further enhanced by the use of venturi, thereby reducing all parasites that are held to fish by the suction cup principle, either father the tenacity or tenure disappears completely. Parasites will usually be able to adjust their sucking ability as the fish change height in water, but due to the relatively rapid change of parasite, the parasites will not be able to increase their suction and thus will almost drop off without further treatment.
15 Således vil der ved denne opfindelse ske en næsten 100% fjernelse af parasitter.Thus, in this invention, nearly 100% removal of parasites will occur.
Man kan forestille sig i fremtiden alternative udførelsesformer, hvor fx fisk suges op fra det første fiskevolumen, men at fiskene efter rensning afleveres i samme volumen, og forestiller sig et pumpesystem, som kører mere eller mindre kontinuerligt i forbin-20 delse med Store havdambrug. Måske bliver det muligt at lære fisk, at når de er generet af lakselus, søger de selv ind gennem pumpesystemet.Alternative embodiments may be envisaged in the future, where, for example, fish are sucked up from the first volume of fish, but the fish after purification are delivered in the same volume, and imagine a pumping system which runs more or less continuously in connection with large marine fish farms. Maybe it will be possible to teach fish that when they are bothered by salmon lice, they search in through the pumping system themselves.
T egningsbeskrivelseApplication description
Fig. 1 viser en principskitse for opfindelsen.FIG. 1 shows a principle sketch of the invention.
Fig. 2 viser en første alternativ udførelsesform for opfindelsen.FIG. 2 shows a first alternative embodiment of the invention.
25 Fig. 3 viser en anden alternativ udførelsesform for opfindelsen.FIG. 3 shows another alternative embodiment of the invention.
Figur 4 viser en tredje alternativ udførelsesformFigure 4 shows a third alternative embodiment
Detaljeret beskrivelse af opfindelsen 30 Fig. 1 viser en principskitse for opfindelsen. På fig. 1 er vist en del af et system 2 til fjernelse af parasitter på fisk 8. Der er vist parasitter 4 siddende på fisk 8 og delvist ijemet fra fisk 8 i et første fiskevolumen 6. Fisk 8 suges opad gennem et sugerør 20, hvor der foregår en kraftig vandstrømning 22. Vandstrømningen 22 er forårsaget af en 6 DK 177873 B1 pumpe 14,172 (Fig 2,3,4). Fisk 12, hvor parasitter er afrenset, ledes tilbage til et fiskevolumen 10 efter dyser 16 har rettet vandstråler 18 mod fiskene 8,12, mens de passerer dyserne 16.DETAILED DESCRIPTION OF THE INVENTION FIG. 1 shows a principle sketch of the invention. In FIG. 1 is shown part of a system 2 for removing parasites on fish 8. Parasites 4 are shown seated on fish 8 and partially restrained from fish 8 in a first fish volume 6. Fish 8 is sucked upwards through a straw 20 where it takes place. a strong water flow 22. The water flow 22 is caused by a pump 14,172 (Fig. 2,3,4). Fish 12, where parasites are cleared, are returned to a fish volume 10 after nozzles 16 have directed water jets 18 at fish 8,12 while passing the nozzles 16.
5 Når fisk 8 ved hjælp af vandstrøm 22 suges op gennem sugerøret 20, sker der op gennem røret et trykfald, bl.a. på grund af strømningshastigheden således, at fiskene 8 oplever et reduceret omgivelsestryk. Dette reducerede tryk betyder, at parasitter 4, herunder lakselus, som fastholdes til fiskene 8 ved hjælp af en sugekopvirkning far deres fastholdekraft væsentligt reduceret og eventuelt helt fjernet. Dermed kan vand-10 strålerne 18 forholdsvist enkelt fjerne parasitter 4, herunder lakselus, når man i forbindelse med reduceret omgivelsestryk samtidig sørger for en vandstråle 18, der kommer fra en anden retning end det umiddelbare omgivende vand. Der vil således opstå delvis turbulens omkring fiskene 8, og denne turbolens ijemer parasitterne 4, herunder lakselus, fra fiskene 8, så parasitterne 4 ikke bliver i stand til igen at suge sig fast på 15 fisken 8 igen. Efterfølgende møder fiskene 8 et filter (162 fig. 4), fx i form af et blødt gumminet, hvor vand sammen med parasitter 4 suges igennem, mens fiskene 8 tvinges over i et nedadgående rørsystem, hvor de nu parasitfri fisk 12 efterfølgende bliver flyttet til fiskevolumen 10.5 When fish 8 is sucked up by means of water flow 22 through the suction pipe 20, a pressure drop occurs, among other things. due to the flow rate such that the fish 8 experiences a reduced environmental pressure. This reduced pressure means that parasites 4, including salmon lice, which are held to the fish 8 by means of a suction cup effect have their retaining power significantly reduced and possibly completely removed. Thus, the water jets 18 can relatively easily remove parasites 4, including salmon lice, when, at reduced ambient pressure, a water jet 18 coming from a different direction from the immediate surrounding water is simultaneously provided. Thus, partial turbulence will occur around the fish 8, and this turbo will absorb the parasites 4, including salmon lice, from the fish 8, so that the parasites 4 will not be able to re-suck on the fish 8 again. Subsequently, the fish 8 encounters a filter (162 Fig. 4), for example in the form of a soft rubber net, where water along with parasites 4 is sucked through, while the fish 8 is forced into a downstream pipe system where the parasite-free fish 12 is subsequently moved to fishing volume 10.
20 Fig. 2 viser en første alternativ udførelsesform for opfindelsen, hvor kun den nedre del af sugerøret 20 er vist, og hvor dette sugerør 20 afsluttes med en skematisk pumpeenhed 14.1 røret 20 strømmer en vandstrøm 22 samtidigt med, der er vist en fisk 8. Fisken 8 har parasitter 4, hvor røret 20 er udformet med en venturi 28, hvor dyserne 16 er placeret i forbindelse med venturien.FIG. 2 shows a first alternative embodiment of the invention in which only the lower part of the suction pipe 20 is shown and where this suction pipe 20 is terminated with a schematic pump unit 14.1 the pipe 20 flows a stream of water 22 simultaneously with a fish 8. The fish 8 has parasites 4, wherein the tube 20 is formed with a venturi 28, the nozzles 16 being located in connection with the venturi.
25 På grund af venturien 28 øges strømningshastigheden for det gennemstrømmede vand 22 ved passage af venturien 28, hvorved der sker et trykfald i det gennemstrømmede vand 22, dette trykfald medvirker til, at parasitterne 4, som fastholdes ved en sugekopvirkning mod fisken 8, far reduceret eller totalt fjernet deres fastholdekraft. Vand-30 strålerne 18 vil herefter spule parasitterne 4 væk fra fisken 8. Den kraftige vandstrøm 22, som giver yderligere turbolens sammen med vandstråleme 18 betyder, at parasitterne 4 får svært ved i det meget urolige strømmende vand at fa kontakt med fisken 8 således, at parasitter 4 og fisk 8 efter passage af venturien ledes til pumpeenheden 14, hvor der foregår en separering af fisk 8 og parasitter 4. Separeringen kan foregå på 7 DK 177873 B1 vidt forskellige måder, fx kan fiskene passere en ringpumpe, hvor fiskene 8 passerer udenom pumpehjul, fordi der er en væskering omkring pumpen, som fiskene kan passere. Efter pumpen vil der således ske en separering, hvor fiskene 8 ledes til et andet fiskevolumen 10, mens størsteparten af det oppumpede vand sammen med parasitter-5 ne 4 ledes gennem en filtreringsenhed inden vandet ledes retur.25 Due to the venturi 28, the flow rate of the flowed water 22 is increased by the passage of the venturi 28, whereby a pressure drop occurs in the flowed water 22, this pressure drop causes the parasites 4 held by a suction action against the fish 8 to be reduced. or totally removed their tenacity. The water-30 rays 18 will then flush the parasites 4 away from the fish 8. The powerful water flow 22, which provides additional turbulence along with the water jets 18, means that the parasites 4 have difficulty in contact with the fish 8 in the very turbulent flowing water, that parasites 4 and fish 8, after passage of the venturi, are directed to the pumping unit 14 where a separation of fish 8 and parasites 4. The separation can take place in 7 different ways, for example the fish can pass a ring pump where the fish 8 passes around the impeller because there is a liquid ring around the pump that the fish can pass through. After the pump, there will thus be a separation where the fish 8 is led to another fish volume 10, while most of the pumped water together with the parasites 5 is passed through a filtration unit before the water is returned.
Fig. 3 viser en anden alternativ udførelsesform for opfindelsen. Et første fiskevolumen 6 indeholder fisk 8, og i dette fiskevolumen findes et rør 20, som via en pumpeenhed 14 suger fisk op gennem røret 20. Røret 20 er udformet med flere venturier 28. Ventu-10 rieme 28 er udformet med dyser 16, disse dyser genererer vandstrømme 18 rettet ind mod fisk 8, der passerer gennem venturieme 28. Nederste fisk vist på fig. 3 indikerer, at denne fisk har et antal parasitter 4 fastgjort til fiskens 8 krop.FIG. 3 shows another alternative embodiment of the invention. A first fish volume 6 contains fish 8, and in this fish volume is a pipe 20 which, via a pump unit 14, sucks fish up through the pipe 20. The pipe 20 is formed with several venturi 28. The valve 10 straps 28 are formed with nozzles 16, these nozzles generate water streams 18 directed toward fish 8 passing through venturi 28. Lower fish shown in FIG. 3 indicates that this fish has a number of parasites 4 attached to the fish's 8 body.
For fisk 8 med parasitter 4* som passerer igennem et flertal af venturier 28, hvor der 15 samtidigt gennem dyser 6 sker en tværstrømning af vand, vil reduktion i omgivelsestryk i venturien 28 medføre, at parasitterne 4 helt eller delvist mister deres fastholdekraft, fordi størsteparten af parasitter 4 holder fast på fisk ved en sugekopvirkning. Undertryk under sugekoppen betyder, at parasitten 4 far en fastholdekraft mod fisken. Hvis trykket udenfor parasittens 4 sugekop reduceres, reduceres ligeledes fastholde-20 kraften, idet der opstår en tilnærmelsesvis trykudligning mellem det lave tryk inde i sugekoppen og det lave tryk i omgivelserne forårsaget af den hurtige strømning gennem venturieme 28. Den gentagne behandling med et mere og mere reduceret tryk op gennem røret 20 vil formodentlig betyde en total fjernelse af parasitter 4.For fish 8 with parasites 4 * passing through a plurality of venturi 28 where 15 simultaneously flows through nozzles 6, a reduction in ambient pressure in venturi 28 will cause the parasites 4 to lose all or part of their holding power, because most of parasites 4 cling to fish by a suction cup action. Suppression under the suction cup means that the parasite 4 gets a hold on the fish. If the pressure outside the suction cup of the parasite 4 is reduced, the retaining force is also reduced, resulting in an approximate pressure equalization between the low pressure inside the suction cup and the low pressure in the environment caused by the rapid flow through the venturi 28. The repeated treatment with a more more reduced pressure up through the tube 20 would presumably mean a complete removal of parasites 4.
25 Figur 4 viser en tredje alternativ udførelsesform 102, hvor tegningsnumre fra tidligere er forhøjet med 100, mens nye tegningsnumre fortsætter rækkefølgen. Fig. 4 viser et første fiskevolumen 106, som indeholder fisk 108, hvilke fisk 108 kan være befængt med parasitter, fx lakselus (ikke vist på fig. 4). Ligeledes viser figuren et andet fiskevolumen 110, som indeholder fisk 112 renset for parasitter. Et sugerør 120 er udfor-30 met med et antal dyser 116, som sprøjter en tværgående vandstrøm ind i sugerøret 120. Sugerøret 120 er udformet med venturier 128. Sugerøret 120 er forbundet med en tværledning 130, som går til en pumpe 132. Denne pumpe genererer vandstrømme i røret 134, som via ringformede forbindelsesrør 136 står i forbindelse med dyser 116. Sugerøret 120 fortsætter i en rørforbindelse 138, som gennem en ventil 140 forbindes 8 DK 177873 B1 til en tank 142. Tanken ér forsynet med en afgangsventil 144. Ligeledes findes en returventil 146, som er forbundet til en rørledning 148. Røret 138 er ligeledes forbundet til en ventil 150, som har forbindelse videre til en tank 152. Tanken 152 er forsynet med en ventil 154, hvor tanken 152 ligeledes er forsynet med en afgangsventil 156. En 5 rørledning 158 kombineres med rørledningen 148 til en fælles rørledning 160. Rørledningen 160 ledes til en fiskeseparator 162. Fra fiskeseparatoren 162 går en rørledning 164 til et andet fiskevolumen 110. Fra fiskeseparatoren 162 ledes vand gennem rørledningen 165 til en separeringsenhed 166. Fra separeringsenheden 166 ledes rent vand gennem rørledningen 168 til omgivede vand. Separeringsenheden 166 indehol-10 der et skråtstillet filter, hvor der udskilles parasitter 4, som opsamles i et volumenet 167. · ·.Figure 4 shows a third alternative embodiment 102, in which drawing numbers from the former are increased by 100, while new drawing numbers continue in the order. FIG. Figure 4 shows a first fish volume 106 containing fish 108 which fish 108 may be infested with parasites, for example salmon lice (not shown in Figure 4). Also, the figure shows another fish volume 110 containing fish 112 purified from parasites. A suction tube 120 is formed with a plurality of nozzles 116 which inject a transverse flow of water into the suction tube 120. The suction tube 120 is formed with venturi 128. The suction tube 120 is connected to a transverse line 130 which goes to a pump 132. This pump generates water flows in the pipe 134 which via annular connecting tubes 136 communicate with nozzles 116. The suction pipe 120 continues in a pipe connection 138 which is connected through a valve 140 to a tank 142. The tank is provided with a discharge valve 144. Similarly there is also a return valve 146 which is connected to a pipeline 148. The tube 138 is also connected to a valve 150 which communicates further to a tank 152. The tank 152 is provided with a valve 154, the tank 152 is also provided with a discharge valve. 156. A pipeline 158 is combined with the pipeline 148 into a common pipeline 160. The pipeline 160 is directed to a fish separator 162. From the fish separator 162, a pipeline 1 64 to another fish volume 110. From the fish separator 162, water is passed through the pipeline 165 to a separating unit 166. From the separating unit 166, pure water is passed through the pipeline 168 to the surrounding water. Separator unit 166 contains an oblique filter where parasites 4 are collected which are collected in a volume 167. · ·.
Sugerøret 120 suger fisk op ffa dét første fiskevolumen 106. Disse fisk udsættes for kraftigt tværgående vandstråler fra dyserne 116, når fiskene passerer igennem venturi-15 eme 128. Ved hjælp af pumpen 132 sker der et trykfald i røret 120. Denne første trykreduktion betyder, at parasitter såsom lakselus får reduceret deres fastholdekraft til fiskene, fordi fastgørelse til fiskene sker ved en sugekopvirkning. Faldende omgivelsestryk vil betyde, at parasitterne delvist mister deres fastholdekraft, allerede når de passerer afgreningen 130. Yderligere trykfald sker ved passage af venturieme 128, 20 hvor tværgående vandstrømninger ffa dyserne 116 forårsager hvirveldannelse og en form for turbulens omkring fiskene, hvorved parasitterne rykkes løs fra fiskenes overflader. Dyserne 116 kan med fordel være rettet skråt nedad i retning mod fiskene, herved bliver vandstrømmen, der kontinuerligt foregår i opadgående retning, mere præcist i retning mod venturieme, hvor omgivelsestrykket er lavest. Tilsvarende kan dy-25 seme 116 drejes således, at der foretages en roterende bevægelse af vandstrømmen i røret 120. Gennem røret 138 pumpes vand og fisk skiftevis ind i de to beholdere 142 og 152. Ved hjælp af ventilerne 140, 146, 144 kan der foretages en total regulering af volumenet 142. Hvis ventil 144 er åben samtidigt med ventil 140, så vil vakuumpumpe 172 via ledningen 170 foretage en fyldning af volumenet 142. Samtidigt vil volu-30 menet 152 have ventil 156 åben således, at denne tank samtidigt foretager en tømning for vand og fisk. Når beholderen 142 er fuld, sker der således en omkobling, og processen foregår modsat ffa den anden beholder. Anvendelse af to-kammersystem bety: der, at vakuumpumpe 172 kan køre kontinuerligt. En simpel niveaukontrol ved hjælp af svømmere kan bestemme omkoblingstidspunkter fra tankene 142 og 152. Vand og 9 DK 177873 B1 fisk forlader tankene gennem rørforbindelse 158 og passerer via rørforbindelse 160 fiskeseparator 162. Fiskeseparatoren er en række gummilameller, hvor fiskene kortvarigt forlader vandet, idet vandet passerer gennem gummilamelleme ned i rørledningen 165. Fiskene fortsætter ned gennem rørledningen 164, hvor fiskene igen møder en 5 vandstrøm, så fiskene kun kortvarigt er oven for vandet. Rørledningen 165 ledes gennem en parasitseparator 166, som er udformet med et filter, hvor vandet passerer igennem filteret, mens parasitterne filtreres ffa. Parasitterne opsamles således i volumenet 167, hvorfra de kan bortskaffes.Suction pipe 120 sucks fish up for the first fish volume 106. These fish are subjected to greatly transverse water jets from the nozzles 116 as the fish pass through the venturi 128. By the pump 132, a pressure drop occurs in the pipe 120. This first pressure reduction means that parasites such as salmon lice have reduced their retention power to the fish, because attachment to the fish is done by a suction cup effect. Falling ambient pressure will mean that the parasites partially lose their retaining power as they pass the branch 130. Further pressure drops occur through the passage of venturi 128, 20 where transverse water flows ffa the nozzles 116 cause swirling and some turbulence around the fish, thereby removing the parasites from the surfaces of the fish. The nozzles 116 may advantageously be directed obliquely downwards towards the fish, whereby the water flow which is continuously going upwards becomes more precise in the direction of the venturi, where the ambient pressure is lowest. Similarly, the diaphragm 116 can be rotated so that a rotational movement of the water flow is made in the tube 120. Through the tube 138, water and fish are alternately pumped into the two vessels 142 and 152. By means of the valves 140, 146, 144, a total control of the volume 142. If valve 144 is open simultaneously with valve 140, then vacuum pump 172 via line 170 will fill the volume 142. At the same time, volume 152 will have valve 156 open so that this tank simultaneously an emptying of water and fish. Thus, when the container 142 is full, a switching occurs and the process takes place opposite to the other container. Use of two-chamber system means that vacuum pump 172 can run continuously. A simple level check by swimmers can determine switching times from tanks 142 and 152. Water and fish leave tanks through pipe connection 158 and pass through pipe connection 160 fish separator 162. The fish separator is a series of rubber slats where the fish briefly leave the water as water passes through the rubber slats down into the pipeline 165. The fish continue down through the pipeline 164, where the fish again meet a water flow so that the fish is only briefly above the water. Pipeline 165 is passed through a parasite separator 166 which is formed with a filter where the water passes through the filter while the parasites are filtered ffa. Thus, the parasites are collected in volume 167 from which they can be disposed.
10 Ved hjælp af denne opfindelse kan der således ske en flytning af fisk fra et første fiskevolumen 106 til et andet fiskevolumen 110 og samtidigt kan der ske en total afrensning af parasitter fra fiskene.Thus, by means of this invention, fish can be moved from a first fish volume 106 to a second fish volume 110 and at the same time a total purification of parasites from the fish can occur.
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK201370541A DK177873B1 (en) | 2013-09-30 | 2013-09-30 | System and method for removing parasites on fish |
| PCT/DK2014/050300 WO2015043603A1 (en) | 2013-09-30 | 2014-09-24 | System and method for removal of parasites on fish |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK201370541 | 2013-09-30 | ||
| DK201370541A DK177873B1 (en) | 2013-09-30 | 2013-09-30 | System and method for removing parasites on fish |
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| Publication Number | Publication Date |
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| DK177873B1 true DK177873B1 (en) | 2014-10-20 |
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| DK201370541A DK177873B1 (en) | 2013-09-30 | 2013-09-30 | System and method for removing parasites on fish |
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| Country | Link |
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| DK (1) | DK177873B1 (en) |
| WO (1) | WO2015043603A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20150910A1 (en) * | 2015-07-10 | 2017-01-11 | Marine Harvest Norway As | Device and method for removing parasites on fish |
| NO340698B1 (en) * | 2016-07-29 | 2017-06-06 | Oekland Jesper | Method and apparatus for removing ectoparasites from fish in fish farms |
| CN107926824A (en) * | 2017-12-29 | 2018-04-20 | 山东省淡水渔业研究院（山东省淡水渔业监测中心） | It can prevent, mitigate the Micropterus salmonoides aquaculture pond and corresponding feed, cultural method of fatty liver |
| NO344624B1 (en) * | 2018-12-17 | 2020-02-10 | Oeren Frank | Method and de-lice equipment for non-medicinal de-lice of fish in a cage |
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| CA2944038A1 (en) * | 2014-03-28 | 2015-10-01 | Cooke Aquaculture Inc. | Method and apparatus for removal of sea lice from live fish |
| CA2987332C (en) * | 2015-05-28 | 2022-07-05 | Eydbjorn Hansen | A device and a method for reducing the number of exterior parasites on fish |
| US10531646B2 (en) | 2016-12-12 | 2020-01-14 | Peter B. Lindgren | Apparatus for directional positioning of fish |
| GB2557993A (en) * | 2016-12-21 | 2018-07-04 | Mohn Tech Limited | Apparatus for the removal of fish lice |
| US10051843B2 (en) | 2017-01-03 | 2018-08-21 | Peter B. Lindgren | Sea lice double fish pump |
| CA3055564A1 (en) | 2017-03-08 | 2018-09-13 | Foster-Miller, Inc. | System and method for treating fish |
| GB2560730B (en) * | 2017-03-22 | 2022-03-09 | Ewen Steele John | Apparatus for removing parasites from host fish |
| NO20170807A1 (en) * | 2017-05-16 | 2018-11-19 | Fjordtech Flekkefjord As | DEVICE FOR DAMAGEING AN EXTERNAL PARASIT ON A FISH |
| CA3040111A1 (en) | 2018-04-13 | 2019-10-13 | Peter B. Lindgren | Improved coanda effect fish pump |
| NZ781775A (en) * | 2019-05-09 | 2024-02-23 | Askvik Aqua As | Apparatus and method for collecting loosened fish parasites in a fish pen |
| DK180619B1 (en) * | 2019-08-08 | 2021-10-14 | K A J Holding Aps | Washing equipment |
| NO20221106A1 (en) * | 2020-04-01 | 2022-10-17 | Br Bakke As | Arrangement and a method of removing parasites from farmed fish |
| NO346796B1 (en) * | 2020-05-18 | 2023-01-16 | Froey Akvaressurs As | System for delousing fish |
| NO347709B1 (en) * | 2022-02-25 | 2024-02-26 | Optimar As | Fleasing unit |
| NO20220659A1 (en) * | 2022-06-09 | 2023-12-11 | Br Bakke As | Assembly and method for delousing fish |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9602224D0 (en) * | 1996-02-03 | 1996-04-03 | Ferranti Thomson Sonar Systems | Method and apparatus for reducing parasite damage to aquatic creatures |
| NO304171B1 (en) * | 1996-12-02 | 1998-11-09 | John Peter Andorsen | Method and apparatus for removing external parasites from salmon |
| NO20092427L (en) * | 2009-01-30 | 2010-08-02 | Feed Control Norway As | Device for deburring aquatic organisms |
| NO331097B1 (en) * | 2010-01-21 | 2011-10-03 | Ctm Lyng As | Device for removing lice from farmed fish |
| NO331345B1 (en) * | 2010-02-05 | 2011-12-05 | Esben Beck | Device and method for damaging parasites on fish |
-
2013
- 2013-09-30 DK DK201370541A patent/DK177873B1/en not_active IP Right Cessation
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2014
- 2014-09-24 WO PCT/DK2014/050300 patent/WO2015043603A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20150910A1 (en) * | 2015-07-10 | 2017-01-11 | Marine Harvest Norway As | Device and method for removing parasites on fish |
| NO340218B1 (en) * | 2015-07-10 | 2017-03-20 | Marine Harvest Norway As | Device and method for removing parasites on fish |
| NO340698B1 (en) * | 2016-07-29 | 2017-06-06 | Oekland Jesper | Method and apparatus for removing ectoparasites from fish in fish farms |
| NO20161244A1 (en) * | 2016-07-29 | 2017-06-06 | Jesper Økland | Method and apparatus for removing ectoparasites from fish in fish farms |
| CN107926824A (en) * | 2017-12-29 | 2018-04-20 | 山东省淡水渔业研究院（山东省淡水渔业监测中心） | It can prevent, mitigate the Micropterus salmonoides aquaculture pond and corresponding feed, cultural method of fatty liver |
| CN107926824B (en) * | 2017-12-29 | 2022-12-20 | 西北农林科技大学 | Micropterus salmoides culture pond capable of preventing and relieving fatty liver, corresponding feed and culture method |
| NO344624B1 (en) * | 2018-12-17 | 2020-02-10 | Oeren Frank | Method and de-lice equipment for non-medicinal de-lice of fish in a cage |
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| WO2015043603A1 (en) | 2015-04-02 |
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