WO2011099865A1 - Device for removing lice from farm fish - Google Patents

Device for removing lice from farm fish Download PDF

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Publication number
WO2011099865A1
WO2011099865A1 PCT/NO2011/000022 NO2011000022W WO2011099865A1 WO 2011099865 A1 WO2011099865 A1 WO 2011099865A1 NO 2011000022 W NO2011000022 W NO 2011000022W WO 2011099865 A1 WO2011099865 A1 WO 2011099865A1
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WO
WIPO (PCT)
Prior art keywords
lice
fish
salmon
tube
openings
Prior art date
Application number
PCT/NO2011/000022
Other languages
French (fr)
Inventor
Sverre Lillemo
Original Assignee
Ctm Lyng As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ctm Lyng As filed Critical Ctm Lyng As
Publication of WO2011099865A1 publication Critical patent/WO2011099865A1/en

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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
    • 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
    • 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
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
    • 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

Definitions

  • the invention concerns a device for removing of parasites from farm fish, particularly salmon lice from farmed salmon.
  • Salmon louse Lepeophtheirus salmonis
  • Louse attack lead to skin damage on the fish. Damage and loss caused by salmon lice attack constitute one of the largest health and economical problems in the fish farming industry today. High occurrence of salmon louse is also considered to be a serious treat to wild salmon.
  • the main object of the present invention is to provide a device which may be used for gentle and effective removal of parasites from fish.
  • Inventor Gebmo has raised the goals to develop a "salmon lice remover" which eliminates the need for manual, individual treatment of the fish, avoiding use of chemical or biological means and which removes salmon lice effectively without causing damage to the fish.
  • the present invention is a.
  • the present invention is defined by claim 1. It comprises an element having at least one rough surface being exposed to the fish. With “rough” is meant a surface having projections and/ or recesses forming edges against fish that contact the element. Such an element constitutes a lice removing unit. In each fish cage one or more such lice removing units may be arranged.
  • the rough surface comprises openings, preferably with a 3-6 millimeters diameter, particularly approximately * millimeters.
  • the element included in the lice removing unit can advantageously constitute a wall of a container which is connected to a tube for suction of water from the container.
  • the tube cross-section is preferably larger than the overall cross-section of the said openings. Thereby is ensured that water flows away from the openings and is able to transport any released salmon louse.
  • the container is preferably concave on its exposed side or sides.
  • the lice removing unit is a perforated tube with a surrounding jacket provided with suction. It may have funnel-shaped end parts.
  • This equipment will, together with a feeding apparatus providing fodder down in the fish cage, work satisfactory.
  • the feeding in the fish cage is in itself preventive. Collected lice may be transported to an intermediate storing facility and can from there be emptied or destroyed or be directed to recovery, manually or automatically.
  • the lice removing unit is by means of a hose connected to a pump and further on to a counting and monitoring system that is lead into a separating system with amount estimation with respect to lice. This is arranged to provide quality assurance of the process, to have its function documented and to automate the lice counting.
  • the equipment is localized where the activity or traffic of fish is highest, which may vary according to the feeding system used and where in the fish cage the highest activity takes place, low in the cage or close to the surface.
  • the lice remover should not be localized in an area through which the fodder will pass since this will lead to an error in the estimation of lice amount. If the lice removal unit is placed above the place of feeding, it will ensure a good effect with respect to lice removal while also ensuring correct estimation of lice amount. It will also show which parts of the day are the most effective ones with respect to the individual lice removal units, by the log produced by each lice remover; this may provide information of the best location as well as the best time of day to have it operational.
  • the invention renders it possible to remove lice from the salmon, day and night, without the use of chemicals or wrasse.
  • the risk of damage to the fish is low.
  • the lice do not become resistant since it removed without toxic compounds.
  • the salmon lice that are removed can be collected and destroyed to avoid new attacks.
  • the invention makes it possible to reducer the occurrence of salmon lice to a level at which the salmon is not significantly irritated. Transferral of lice to wild salmon will therefore be reduced. When the salmon is free from lice it will be healthier and more natural in its movements. This will again reduce the stress and make the farmer more content. It will also contribute to the economics in the industry. The invention will make it easier to maintain the industry's reputation.
  • the invention may be used in combination with chemical and/ or biological means for lice removal.
  • Example 1 the invention may be used in combination with chemical and/ or biological means for lice removal.
  • Fig. 1 is a schematic side view of a fish cage with fish and a lice removal unit according to the present invention
  • Fig. 2 is a perspective view of a lice removal unit according to the present invention
  • Fig. 3 is a sectional view of a collective opening in a lice removal unit of a plate material of a certain thickness
  • Figs. 4 and 5 are sectional views of two alternative lice removal units.
  • a fish cage 11 is shown in the sea with a buoyant collar 12 and a bag of seine material.
  • a lice removal unit 14 is suitably attached to the buoyant collar 12, preferably by means of two attachment strings 15, 16 under the buoyant collar.
  • the lice removal unit 14 is connected to a suction hose 17 which is connected to a not shown operational unit, e.g. on a floating platform or on shore. Further details of the lice removal unit 14 is described with reference to Fig. 2.
  • FIG. 2 an exemplary embodiment of a lice removal unit 21 useful in the same manner as the lice removal unit 14 in Fig. 1, is shown.
  • the lice removal unit 21 has the shape of an extended, generally closed box 22 having concave, longitudinal side walls 23.
  • Each of the concave, longitudinal side walls has a perforated pattern of unitary openings 24 in three symmetrically arranged rows.
  • a conduit 26 is arranged for connection to a hose or a pipe for pumping water out of the box 22. It is convenient that the cross-section of the hose is larger than the total cross-section of openings 24, allowing an inward flow rate through the openings 24 to thereby suck in released salmon lice for further
  • the lice removal unit 21 can be produced with concave side walls 23 of a plate material, e.g. in stainless steel.
  • the openings 24 then will have sharp edges that contribute to the scraping off of salmon lice.
  • it is desired to produce the box 22 in another material than thin plate material, e.g. plastic plates it may be favourable to make the openings 24 conically diverging in the inward direction as shown by Fig. 3.
  • the outer edge will have the shape of a circular edge able to scrape off salmon lice when the salmon glides in contact with the lice removal unit. Being circular it will function in all directions to facilitate removal of lice independent of the direction of movement in relation to the surface.
  • Figure 4 shows an alternative shape of a box 28 for a lice removal unit, having four concave side areas 29, 30, 31, and 32. This allows removal of salmon lice when in touch with any side. Such a design requires increased cross-section of the hose 17 for the pumping out of water (Fig. 1).
  • Fig. 5 shows yet another embodiment of a lice removal unit 34.
  • the active element is a perforated tube 35 with openings in both ends for flowing water there thorough and for allowing fish to pass through.
  • a tube shaped jacket 36 Around the perforated tube 35 a tube shaped jacket 36, closet at its ends and exhibiting a conduit 37 for pumping out of water, is shown.
  • the ends of the perforated tube 35 can be provided with funnel shaped inlet area to make it easier for the salmon to enter the perforated tube. It is furthermore possible to provide a water flow through the perforated tube to stimulate the salmon to enter the tube in a certain direction.
  • the system for evacuating water from the lice removal units can be made by conventional pumps. In this system sensors may be arranged to register the number of salmon lice scraped off and collected. This way it is possible to monitor the effect of placing the lice removal unit in different locations in a fish cage, to thereby find the location giving the best result.
  • the lice removal unit can also be made as a plate shaped box or container having one perforated side.
  • padding 38 (Fig. 4) of convenient material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Processing Of Meat And Fish (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Catching Or Destruction (AREA)

Abstract

Device for removal of parasites from fish with an element (14) having at least one rough surface which is exposed to the fish. The rough surface comprises openings, preferably with a diameter of 3-6 millimeters, preferably about 4 millimeters.

Description

Device for removing lice from farm fish
The invention concerns a device for removing of parasites from farm fish, particularly salmon lice from farmed salmon.
Background Salmon louse, Lepeophtheirus salmonis, is a parasite on salmon in seawater. Louse attack lead to skin damage on the fish. Damage and loss caused by salmon lice attack constitute one of the largest health and economical problems in the fish farming industry today. High occurrence of salmon louse is also considered to be a serious treat to wild salmon.
Use of chemical compounds to destroy salmon lice in fish farms has raised the question of the compounds environmental-toxic effects. TO avoid development of resistance it is desirable to limit or terminate the use of vaccines and other forms of medical treatment intended to kill the salmon lice. Such treatment is furthermore time consuming and expensive.
It is also well known to use biological means to destroy salmon lice. For instance has wrasse and some other marine organisms been used. Finally a number of different forms of mechanical means have been tried to remove salmon lice, either by individual, manual treatment of the fish or by exposing it for some form of common, mechanical treatment, e.g. by flushing with water. This has lead to damages to the fish which again has reduced its value.
A general conclusion is that there is no method or device which provides a satisfactory, effective removal of salmon lice.
Objective
The main object of the present invention is to provide a device which may be used for gentle and effective removal of parasites from fish. Inventor Lillemo has raised the goals to develop a "salmon lice remover" which eliminates the need for manual, individual treatment of the fish, avoiding use of chemical or biological means and which removes salmon lice effectively without causing damage to the fish.
It is furthermore an object to provide a device which does not pollute the environment and is environmentally friendly also in other aspects. It is furthermore an object to provide a device which renders it possible to collect the lice removed from the fish and in some embodiments to register the number of salmon lice in order to monitor and map the occurrence of salmon lice. It is also important to reduce the time consumption and the costs thereby related so that the price of the end product is not increased or the economy of the fish farming industry negatively affected.
The present invention
The present invention is defined by claim 1. It comprises an element having at least one rough surface being exposed to the fish. With "rough" is meant a surface having projections and/ or recesses forming edges against fish that contact the element. Such an element constitutes a lice removing unit. In each fish cage one or more such lice removing units may be arranged.
Experience shows that salmon being infested with lice become more and more uneasy. At a stage it will tend to move against barriers, like the cage wall, in attempts to get rid of the troublesome parasite. This appears to happen at the stage when the lice creeps beneath the fish scales and more seriously and directly attack the fish meat.
It has surprisingly been shown that an element having a rough surface, which is arranged in or adjacent to a fish cage, will attract salmon being infested with salmon lice, the salmon thereby attempting to scrape off the salmon lice.
Preferred embodiments of the invention are disclosed by the claims 2-9.
It is advantageous that the rough surface comprises openings, preferably with a 3-6 millimeters diameter, particularly approximately * millimeters.
The element included in the lice removing unit can advantageously constitute a wall of a container which is connected to a tube for suction of water from the container.
The tube cross-section is preferably larger than the overall cross-section of the said openings. Thereby is ensured that water flows away from the openings and is able to transport any released salmon louse.
The container is preferably concave on its exposed side or sides.
In a preferred embodiment the lice removing unit is a perforated tube with a surrounding jacket provided with suction. It may have funnel-shaped end parts.
It is important to hold the lice removing equipment as clean as the rest of the equipment in the fish cages in which the salmon have access.
This equipment will, together with a feeding apparatus providing fodder down in the fish cage, work satisfactory. The feeding in the fish cage is in itself preventive. Collected lice may be transported to an intermediate storing facility and can from there be emptied or destroyed or be directed to recovery, manually or automatically.
The lice removing unit is by means of a hose connected to a pump and further on to a counting and monitoring system that is lead into a separating system with amount estimation with respect to lice. This is arranged to provide quality assurance of the process, to have its function documented and to automate the lice counting.
By means of this equipment one can furthermore achieved an accurate control with the lice situation in the area and know whether it is increasing or diminishing. A warning for deviations can be implemented as well as for unforeseen changes. Temperature changes recorded along with the other documentation can provide a very good picture of the situation in the area in which the equipment is installed.
Localization
The equipment is localized where the activity or traffic of fish is highest, which may vary according to the feeding system used and where in the fish cage the highest activity takes place, low in the cage or close to the surface.
The best result appears to be reached when the equipment is used together with a feeding system by which the feeding takes place in some restricted areas so that the density during lice removal is as high as possible. There are systems that are very well suited for this combination, presumed optimal localization and density.
In large fish cages it may be advantageous to place a number of units strategically in relation to the fish amount and traffic. It may also be preferred to use a feeding system that gathers the salmon around the feeding location.
It is important to place the element correct to achieve a lice removal as effective as possible even when the feeding system used in the location is not particularly suited for the object.
By registering the amount of lice from the different lice removal units in a test period, this will indicate the best location for the lice remover in the fish cage.
The lice remover should not be localized in an area through which the fodder will pass since this will lead to an error in the estimation of lice amount. If the lice removal unit is placed above the place of feeding, it will ensure a good effect with respect to lice removal while also ensuring correct estimation of lice amount. It will also show which parts of the day are the most effective ones with respect to the individual lice removal units, by the log produced by each lice remover; this may provide information of the best location as well as the best time of day to have it operational.
The invention renders it possible to remove lice from the salmon, day and night, without the use of chemicals or wrasse. The risk of damage to the fish is low. The lice do not become resistant since it removed without toxic compounds. The salmon lice that are removed can be collected and destroyed to avoid new attacks.
The invention makes it possible to reducer the occurrence of salmon lice to a level at which the salmon is not significantly irritated. Transferral of lice to wild salmon will therefore be reduced. When the salmon is free from lice it will be healthier and more natural in its movements. This will again reduce the stress and make the farmer more content. It will also contribute to the economics in the industry. The invention will make it easier to maintain the industry's reputation.
In some situation the invention may be used in combination with chemical and/ or biological means for lice removal. Example
Below the invention is described in further detail with reference to the drawings, in which
Fig. 1 is a schematic side view of a fish cage with fish and a lice removal unit according to the present invention,
Fig. 2 is a perspectival view of a lice removal unit according to the present invention,
Fig. 3 is a sectional view of a collective opening in a lice removal unit of a plate material of a certain thickness, while
Figs. 4 and 5 are sectional views of two alternative lice removal units.
According to Fig. 1 a fish cage 11 is shown in the sea with a buoyant collar 12 and a bag of seine material. In the fish cage 11 a lice removal unit 14 is suitably attached to the buoyant collar 12, preferably by means of two attachment strings 15, 16 under the buoyant collar.
The lice removal unit 14 is connected to a suction hose 17 which is connected to a not shown operational unit, e.g. on a floating platform or on shore. Further details of the lice removal unit 14 is described with reference to Fig. 2.
To simplify the drawing and the description, other known equipment such as walking bridges, feeding equipment and other operational equipment, is omitted in the drawing.
1. In Fig. 2 an exemplary embodiment of a lice removal unit 21 useful in the same manner as the lice removal unit 14 in Fig. 1, is shown. The lice removal unit 21 has the shape of an extended, generally closed box 22 having concave, longitudinal side walls 23.
Each of the concave, longitudinal side walls has a perforated pattern of unitary openings 24 in three symmetrically arranged rows. In one of the end walls 25 a conduit 26 is arranged for connection to a hose or a pipe for pumping water out of the box 22. It is convenient that the cross-section of the hose is larger than the total cross-section of openings 24, allowing an inward flow rate through the openings 24 to thereby suck in released salmon lice for further
transportation to a site for collection, destruction or use thereof.
The lice removal unit 21 can be produced with concave side walls 23 of a plate material, e.g. in stainless steel. The openings 24 then will have sharp edges that contribute to the scraping off of salmon lice. If it is desired to produce the box 22 in another material than thin plate material, e.g. plastic plates, it may be favourable to make the openings 24 conically diverging in the inward direction as shown by Fig. 3. Then the outer edge will have the shape of a circular edge able to scrape off salmon lice when the salmon glides in contact with the lice removal unit. Being circular it will function in all directions to facilitate removal of lice independent of the direction of movement in relation to the surface.
At each end of the lice removal unit an attachment bail 27 for attachment of the strings 15 and 16 in Fig. 1 is shown.
Figure 4 shows an alternative shape of a box 28 for a lice removal unit, having four concave side areas 29, 30, 31, and 32. This allows removal of salmon lice when in touch with any side. Such a design requires increased cross-section of the hose 17 for the pumping out of water (Fig. 1).
Fig. 5 shows yet another embodiment of a lice removal unit 34. Here the active element is a perforated tube 35 with openings in both ends for flowing water there thorough and for allowing fish to pass through. Around the perforated tube 35 a tube shaped jacket 36, closet at its ends and exhibiting a conduit 37 for pumping out of water, is shown.
The ends of the perforated tube 35 can be provided with funnel shaped inlet area to make it easier for the salmon to enter the perforated tube. It is furthermore possible to provide a water flow through the perforated tube to stimulate the salmon to enter the tube in a certain direction. The system for evacuating water from the lice removal units can be made by conventional pumps. In this system sensors may be arranged to register the number of salmon lice scraped off and collected. This way it is possible to monitor the effect of placing the lice removal unit in different locations in a fish cage, to thereby find the location giving the best result. The lice removal unit can also be made as a plate shaped box or container having one perforated side.
External sharp edges on the equipment can be covered by padding 38 (Fig. 4) of convenient material.

Claims

Claims
1. Device for removing parasites from fish, particularly salmon lice from salmon, characterized by an element (14) having a rough surface being exposed to the fish.
2. Device as claimed in claim 1, characterized in that at least a part of the rough surface comprises openings, preferably with a diameter from 3 to 6 mm, particularly about 4 mm.
3. Device as claimed in claim ¾ characterized in that the element (23) with openings (24) constitutes a wall in a box (21) which is connected to a tube (26) arranged for evacuating water from the container.
4. Device as claimed in claim 3, characterized in that the tube (26) cross-section is larger than the total cross-section of the openings (24).
5. Device as claimed in claim 3, characterized in that one side (23) of the box (21) is concave on the exposed side.
6. Device as claimed in claim 1, characterized in that the element having a rough surface is a perforated tube (35) with a surrounding tube jacket (36) connected to an evacuating tube (37).
7. Device as claimed in claim s; characterized in that the perforated tube has funnel formed end flanges.
8. Device as claimed in claim 3, characterized in that sensors for registering the number or amount of salmon lice are arranged in the evacuating system.
9. Device as claimed in one of claims 1 to 8, characterized in that it is exposed to the fish over the feeding area.
PCT/NO2011/000022 2010-01-21 2011-01-19 Device for removing lice from farm fish WO2011099865A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20100106A NO331097B1 (en) 2010-01-21 2010-01-21 Device for removing lice from farmed fish
NO20100106 2010-01-21

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WO2011099865A1 true WO2011099865A1 (en) 2011-08-18

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015043603A1 (en) * 2013-09-30 2015-04-02 Erhard Joensen System and method for removal of parasites on fish
EP2962556A1 (en) 2014-06-30 2016-01-06 Ardeo Technology AS A system and method for monitoring and control of ectoparasites of fish
NO337292B1 (en) * 2013-04-23 2016-02-29 Kjell Hopen Device for collecting and destroying lice in a cage
NO20151709A1 (en) * 2015-12-14 2017-02-27 Dalland Jo Inge Elastic net for removing parasite on fish
US10051843B2 (en) 2017-01-03 2018-08-21 Peter B. Lindgren Sea lice double fish pump
EP3547797A1 (en) 2018-03-27 2019-10-02 Bitunamel Feldmann GmbH Boat with an apparatus for killing separated and collected fish parasites
US10531646B2 (en) 2016-12-12 2020-01-14 Peter B. Lindgren Apparatus for directional positioning of fish
US10653118B2 (en) 2018-04-13 2020-05-19 Peter B. Lindgren Coanda effect fish pump
US10757922B2 (en) 2017-03-08 2020-09-01 Foster-Miller, Inc. System and method for treating fish
US10843207B2 (en) 2014-03-28 2020-11-24 Cooke Aquaculture Inc. Method and apparatus for removal of sea lice from live fish
WO2021046662A1 (en) * 2019-09-12 2021-03-18 Innovación, Desarrollo Y Soluciones Ltda. System for removing and killing free ectoparasites in the water column in fish farms
US20220217953A1 (en) * 2019-05-09 2022-07-14 Askvik Aqua As Apparatus and method for collecting loosened fish parasites in a fish pen

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NO340698B1 (en) * 2016-07-29 2017-06-06 Oekland Jesper Method and apparatus for removing ectoparasites from fish in fish farms
NO20170973A1 (en) * 2017-06-15 2018-12-17 Eriksen Ben Tommy SALMON LUSE REMOVAL SYSTEM

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO337292B1 (en) * 2013-04-23 2016-02-29 Kjell Hopen Device for collecting and destroying lice in a cage
WO2015043603A1 (en) * 2013-09-30 2015-04-02 Erhard Joensen System and method for removal of parasites on fish
US10843207B2 (en) 2014-03-28 2020-11-24 Cooke Aquaculture Inc. Method and apparatus for removal of sea lice from live fish
EP2962556A1 (en) 2014-06-30 2016-01-06 Ardeo Technology AS A system and method for monitoring and control of ectoparasites of fish
NO20151709A1 (en) * 2015-12-14 2017-02-27 Dalland Jo Inge Elastic net for removing parasite on fish
NO340009B1 (en) * 2015-12-14 2017-02-27 Dalland Jo Inge Elastic net for removing parasite on fish
US10531646B2 (en) 2016-12-12 2020-01-14 Peter B. Lindgren Apparatus for directional positioning of fish
US10051843B2 (en) 2017-01-03 2018-08-21 Peter B. Lindgren Sea lice double fish pump
US10757922B2 (en) 2017-03-08 2020-09-01 Foster-Miller, Inc. System and method for treating fish
EP3547797A1 (en) 2018-03-27 2019-10-02 Bitunamel Feldmann GmbH Boat with an apparatus for killing separated and collected fish parasites
US10653118B2 (en) 2018-04-13 2020-05-19 Peter B. Lindgren Coanda effect fish pump
US20220217953A1 (en) * 2019-05-09 2022-07-14 Askvik Aqua As Apparatus and method for collecting loosened fish parasites in a fish pen
WO2021046662A1 (en) * 2019-09-12 2021-03-18 Innovación, Desarrollo Y Soluciones Ltda. System for removing and killing free ectoparasites in the water column in fish farms

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NO331097B1 (en) 2011-10-03

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