WO2012115522A1 - Couloir de transport de poissons et procédé pour le transport sur courte distance de poissons vivants - Google Patents

Couloir de transport de poissons et procédé pour le transport sur courte distance de poissons vivants Download PDF

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Publication number
WO2012115522A1
WO2012115522A1 PCT/NO2012/050006 NO2012050006W WO2012115522A1 WO 2012115522 A1 WO2012115522 A1 WO 2012115522A1 NO 2012050006 W NO2012050006 W NO 2012050006W WO 2012115522 A1 WO2012115522 A1 WO 2012115522A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyance
corridor
fish
frame
gas
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/NO2012/050006
Other languages
English (en)
Inventor
Lars Aglen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2012115522A1 publication Critical patent/WO2012115522A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/02—Receptacles specially adapted for transporting live 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
    • 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 present invention concerns a device and a method for short distance conveyance of fish.
  • a device for conveyance of fish with the use of pumps is known from WO 02078436.
  • the present invention is a.
  • the present invention concerns a method as defined by claim 11.
  • the conveyance corridor comprises in a convenient embodiment a pipeline with walls of fishing net, i.e. of fabric having openings to the environment.
  • the corridor can have circular, square, oval or other cross-sectional shape, but it is simple and in many connections preferred that the cross- section is circular. Since the walls are soft and without carrying capacity, they need to be supported by a framework to not collapse.
  • the framework may be in any material, e.g. synthetic, composite, steel and aluminium and typically is comprised by discrete frames arranged at fixed mutual intervals.
  • each individual frame comprises a frame tube arranged to distribute pressurized gas to the cross-section of the conveyance corridor via nozzles along the tube.
  • the tube may, but need not, be made in a material constituting a main part of the framework. It is thus an option to use rigid tubes having the double function of holding open the conveyance corridor and distributing gas, or soft tubes may be attached to a more rigid frame, the soft tubes only having the function of distributing gas bubbles.
  • the conveyance corridor can be held vertically in place by means of secured buoyant bodies or float balls. Hawsers along the conveyance corridor can be used to stretch it in longitudinal direction. Weight or ballast bodies attached to the lower part of certain frames may contribute so stabilizing the conveyance corridor in the water and may serve as attachment points for hawsers being arranged mainly radially from the conveyance corridor to stretch it out.
  • Figure 1 is a schematic naval view of a segment of a conveyance corridor according to the present invention.
  • Figure 2 shows a cross-section of the conveyance corridor shown in Figure 1.
  • Figure 1 shows a segment of a conveyance corridor 10 with walls of fishing net 11 and which by frames 12 is divided into a number of length sections L
  • the dimensions may vary significantly but the radius of such a corridor may typically vary from half a meter to 2 meter and may in certain cases also be outside these limits. Also the length dimensions can vary significantly but will typically be at least as large as the diameter of the corridor, from 1 meter and more, typically 4-5 meter when the radius is in the order of .magnitude 1.5 meter.
  • the distance L between the frames and the dimensions of the conveyance corridor are adapted to the type and size of the fish.
  • FIG 2 a cross-section of the conveyance corridor 10 from Figure 1 is shown at a frame 12.
  • the frame 12 comprises a circularly frame tube 13 in a hollow and comparatively rigid material which is suited for stretching out the wall 11 of the corridor.
  • buoyant bodies 14 are attached and near the bottom of the frame tube 13 two mutually balanced ballast bodies 15 are attached, serving to stabilizing the frame tube 13 and thereby the frame 12 and in last instance the entire conveyance corridor 10 in desired position in the sea.
  • radially arranged hawsers 16 may be attached to the tube 13 at the ballast bodies 15 to optionally secure or thereby further stabilize the frame 12 and thereby the conveyance corridor 10.
  • the hawsers 16 can at their other end be attached to any suitable object in the actual case, that being the sea bottom, a vessel side, weights or anchors.
  • a valve 17 is shown connected to a longitudinally extending supply hose 18 for pressurized gas. Any harmless gas can be used and in practice air is typically preferred.
  • the valve 17 can be adjusted from zero supply to a supply having a typical operational pressure of 6 bar.
  • Each frame tube 13 along the length of the corridor 10 has a valve 17 that can be controlled independent of the other valves.
  • a number of perforations 20 are localized at rather small intervals along the lower half of the frame tube 13, so that gas being supplied to the frame tube via the valve 17, will rise up in the form of bubbles from the perforations 20, forming a dense "curtain" that fish will seek to avoid contact with.
  • the hose 18 for pressurized air typically has a rigidity that makes it serve to hold out the conveyance corridor in its longitudinal direction. Furthermore a hawser 19 may be used at the other side of the periphery of the corridor also to contribute to holding the conveyance corridor tightly outstretched. It is not required that the hose 18 for pressurized air is positioned at the top points of the frame tubes and the hawser.
  • the conveyance corridor can be tightened by use of longitudinally extending hawsers as shown by 19 at the lowermost part of the frame 12 in Figure 2.
  • Exposed parts of the conveyance corridor such as their connection to a fish cage, boat, fleet or tank, may advantageously be reinforced by means of tarpaulins, double wall or double sewing.
  • the conveyance corridor shown in the drawings is circumferentially closed but when arranging a conveyance corridor at sea surface it is not required that it has a ceiling.
  • the conveyance corridor is with regard to physical construction conventional with the exception of the frames which serve the purpose of periodically setting up curtains of gas bubbles that will prevent fish from passing through.
  • the noise from gas bubble will be disturbing to the fish and it will move away from the gas bubbles thereby moving from one length section to the next one.
  • the next (second) valve 17 is opened so that second frame tube 13 sets up a curtain of gas bubbles. Supply of gas to the first frame tube can now be terminated since the bubbles in the second frame will prevent the fish from returning.
  • the conveyance corridor has moveable partition walls of gas- or air bubbles, but it is worth noticing that the bubbles not only constitute walls, they also generate noise, increasing with increasing supplied gas pressure, which contributes to making the fish move in the same direction all the time. In this manner the fish can be urged to move slowly and at its own chosen speed from length section to length section. It is thus not exposed to unacceptable levels of stress.
  • Supply of pressurized air at pressure levels in the range 4-6 bar has proven to be effective for the present invention. Large fish may required somewhat higher pressure levels than smaller fish.
  • displacement may be used, i.e. a gradual reduction of the available volume in which it reside in the direction of the starting point of the conveyance corridor or use of particular noise signals, e.g. addition of gas bubbles at certain positions outside the conveyance corridor.
  • the present invention is a comparatively simple arrangement when the frames are mass produced. A quiet and substantially continuous movement of fish can be achieved or a desired number of fish can be "portioned" out and moved forward. There is no accumulation of fish at which crush and stress can be excessive and there is no risk of damage to the fish, contrary to what is the case when fish is pumped.

Landscapes

  • 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

L'invention concerne un couloir de transport de poissons (10) comprenant au moins une paroi physique (11). Le couloir de transport comprend au moins une source (13, 17, 18) pour la production périodique de bulles de gaz, placée sous le couloir de transport et le coupant. L'invention concerne également un procédé pour le transport sur courte distance de poissons vivants au moyen du couloir de transport (10), en établissant au moins une rangée de bulles de gaz coupant le couloir de transport, qui fonctionne partiellement comme une paroi et partiellement comme une incitation auditive pour que les poissons s'éloignent des bulles de gaz.
PCT/NO2012/050006 2011-02-22 2012-01-23 Couloir de transport de poissons et procédé pour le transport sur courte distance de poissons vivants Ceased WO2012115522A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20110296 2011-02-22
NO20110296A NO20110296A1 (no) 2011-02-22 2011-02-22 Transportkorridor for fisk og fremgangsmåte for transport av levende fisk over korte distanser

Publications (1)

Publication Number Publication Date
WO2012115522A1 true WO2012115522A1 (fr) 2012-08-30

Family

ID=46584536

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2012/050006 Ceased WO2012115522A1 (fr) 2011-02-22 2012-01-23 Couloir de transport de poissons et procédé pour le transport sur courte distance de poissons vivants

Country Status (2)

Country Link
NO (1) NO20110296A1 (fr)
WO (1) WO2012115522A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014198556A1 (fr) 2013-06-12 2014-12-18 Ardeo Technology As Système et procédé permettant une évaluation systématique des poissons dans une installation d'aquaculture
NO347507B1 (en) * 2022-01-11 2023-11-27 Aker Solutions As Fish farm
US12054902B2 (en) 2020-03-12 2024-08-06 Henry K. Obermeyer Fish passage system for medium and high head dams

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446532A (en) * 1975-01-04 1976-08-18 Field Polynet Ltd C J Keep nets
EP0202730A2 (fr) * 1985-05-15 1986-11-26 H. STEADE & SONS LIMITED Filet de garde pour pêcheurs
WO1999040780A1 (fr) * 1998-02-11 1999-08-19 Ian Mcrobert Appareil et procede pour relever le filet d'un enclos d'aquaculture et enclos d'aquaculture utilisant cet appareil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE56769B1 (en) * 1984-05-31 1991-12-04 Johnson Michael D A Keepnets
US6273639B1 (en) * 1999-10-01 2001-08-14 Webjorn Eikrem Method and apparatus for facilitating migration of fish past dams and other barriers in waterways
NO312003B1 (no) * 1999-10-04 2002-03-04 Inge Henning Jenssen Anordning for oppbevaring og transport av levende fisk
NL1026476C2 (nl) * 2004-06-22 2005-12-23 Witteveen & Bos Raadgevende In Visgeleidingssysteem.
GB2441955B (en) * 2006-09-21 2010-06-02 Michael John Radburn Keep net

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446532A (en) * 1975-01-04 1976-08-18 Field Polynet Ltd C J Keep nets
EP0202730A2 (fr) * 1985-05-15 1986-11-26 H. STEADE & SONS LIMITED Filet de garde pour pêcheurs
WO1999040780A1 (fr) * 1998-02-11 1999-08-19 Ian Mcrobert Appareil et procede pour relever le filet d'un enclos d'aquaculture et enclos d'aquaculture utilisant cet appareil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014198556A1 (fr) 2013-06-12 2014-12-18 Ardeo Technology As Système et procédé permettant une évaluation systématique des poissons dans une installation d'aquaculture
US12054902B2 (en) 2020-03-12 2024-08-06 Henry K. Obermeyer Fish passage system for medium and high head dams
NO347507B1 (en) * 2022-01-11 2023-11-27 Aker Solutions As Fish farm

Also Published As

Publication number Publication date
NO332133B1 (no) 2012-07-02
NO20110296A1 (no) 2012-07-02

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