WO2008104035A1 - Pisciculture - Google Patents

Pisciculture Download PDF

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Publication number
WO2008104035A1
WO2008104035A1 PCT/AU2008/000288 AU2008000288W WO2008104035A1 WO 2008104035 A1 WO2008104035 A1 WO 2008104035A1 AU 2008000288 W AU2008000288 W AU 2008000288W WO 2008104035 A1 WO2008104035 A1 WO 2008104035A1
Authority
WO
WIPO (PCT)
Prior art keywords
fish
farm according
fish farm
tank
zone
Prior art date
Application number
PCT/AU2008/000288
Other languages
English (en)
Inventor
Colin Beasley
Travis Beasley
Brad Beasley
Original Assignee
Thurla Produce Pty Ltd
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
Priority claimed from AU2007901061A external-priority patent/AU2007901061A0/en
Application filed by Thurla Produce Pty Ltd filed Critical Thurla Produce Pty Ltd
Priority to AU2008221244A priority Critical patent/AU2008221244A1/en
Publication of WO2008104035A1 publication Critical patent/WO2008104035A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; 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 relates to a fish farm for growing and processing fish in freshwater or seawater.
  • Fish farms typically comprise large areas enclosed by nets supported by a floating structure. The fish are fed in these growing nets and grow until they are a size suitable for harvesting. During their growth there are times when fish need to be taken out of the growing nets and processed. For example, fish may be subjected to a salt or formalin baths to remove diseases that can form on fish scales. Additionally, during harvesting some fish may be returned to the growing nets if they do not meet size requirements .
  • Removing fish from the growing nets involves manually hand netting the fish out and placing them in a processing area such as a bath or a similar reservoir. Physically handling the fish in this manner creates high stress levels in the fish. In turn, it is common for fish stop eating for a couple of days, which reduces growth rates. Fish mortality also increases after handling.
  • a fish farm comprising a structure of floating members to be floated on water, to define at least one submerged enclosure defining a fish growing zone and at least one submerged enclosure defining a fish processing zone, the zones being selectively interconnected wherein fish can be herded from the growing zone to the processing zone by a moveable barrier.
  • the fish farm is preferably made of modular components to enable the farm to be constructed in any desired shape and configuration.
  • the processing zone is preferably a tank, which has an open top, that is supported by the floating members.
  • the floating members are typically modular pontoons that may be arranged in any desired structural formation.
  • the growing zone is located adjacent the tank, and in a preferred embodiment multiple growing zones surround a central tank.
  • the growing zones are defined by elongated areas enclosed by nets suspended in water between the floating members.
  • the tank is provided with closeable openings through which fish are transferred, wherein each opening communicates with one growing zone.
  • each opening communicates with one growing zone.
  • the fish are herded towards a smaller space in the tank from where the fish is harvested by hand or mechanically, for example using a fish pump.
  • the moveable barrier is designed to move along the length of the growing zone and herd fish toward the respective tank opening.
  • the barrier is preferably provided with apertures to grade the fish as the fish are herded into the cage.
  • the apertures may be varied, by changing the barrier type, in order to grade fish of different size.
  • the tank too may be provided with a moveable barrier in order to herd fish within the tank.
  • the moveable barriers are designed to be raised and lowered into the tank and growing zones, and are supported and moveable on the upper platform of the floating members.
  • the modular pontoons may be connected end to end, side to side or end to side.
  • the pontoons may be rigidly connected or pivotally connected by a pin arrangement.
  • Bird netting may be provided above the growing and processing zones and timed automatic feeding devices drop food into the growing zones .
  • the floating members are made of rotationally moulded plastics and comprise a hollow body with water receiving grooves on the underside of the body to create stability.
  • the platform on the floating member may be roughened to provide anti-slip characteristics.
  • Figure 1 is a perspective view of a fish farm in accordance with an embodiment of the present invention
  • Figure 2 is a perspective view of one section of the fish farm illustrated in Figure 1;
  • Figure 3 is a front elevation view of the fish farm illustrated in Figure 2;
  • Figure 4 is an enlarged view illustrating Area ⁇ A' in Figure 2 ;
  • Figure 5 (a) is a perspective view illustrating the tank of the fish farm
  • Figure 5 (b) is a plan view of a section of the tank and floating members of the fish farm
  • Figure 5(c) is a section view taken at B-B of Figure 5 (b) ;
  • Figure 5(d) is an enlarged view of Area X C in Figure 5 (c) ;
  • Figure 6 (a) is a side elevation view of floating members of the fish farm joined perpendicularly;
  • Figure 6 (b) is a perspective view of Figure 6 (a) ;
  • Figure 7 (a) is a side elevation view of floating members of the fish farm joined linearly;
  • Figure 7 (b) is a perspective view of Figure 7 (a) ;
  • Figure 8 (a) is a first perspective view of the underside of a floating member
  • Figure 8 (b) illustrates in perspective the upper side of a floating member
  • Figure 8 (c) is a perspective exploded view of a floating member
  • Figure 8 (d) is an end view of a floating member
  • Figure 8 (e) is a side view of a floating member
  • Figure 8(f) is a second perspective view of the underside of a floating member
  • Figure 9 illustrates in perspective three floating members joined laterally.
  • FIGS 10 and 11 illustrate in perspective alternative types of barriers of the fish farm.
  • a fish farm 10 as illustrated in the drawings provides an improved environment in which fish of any variety can healthily grow with minimal stress until harvested.
  • the farm can be used to grow other marine organisms such as crustaceans and molluscs.
  • the fish farm 10 comprises a modular structure of floating members 12 which suspend the fish farm in freshwater or sea water.
  • the farm 10 has at least one submerged fish growing zone 20 from where fish are herded to at least one submerged processing zone 30 by a movable barrier.
  • the processing zone is located central of and adjacent to the growing zones so that fish may swim from one zone to the other.
  • Other embodiments may include many growing zones adjacent to many processing zones.
  • small fish for example of about 20Og in weight, are brought to the growing zone 20 to live and grow.
  • the fish can grow to 80Og to over 2kg before being harvested.
  • the growing zones 20 are defined by nets 22 submerged in water and hooked between rows of floating members 12.
  • nets 22 are not illustrated in Figure 1, but they are illustrated in Figures 2 to 4.
  • the nets extend around the sides and bottom of the growing zone, which is elongated and substantially rectangular parallelpiped in shape, and taper towards the processing zone.
  • the growing zone in the preferred embodiment is 13m x 2m x 2m in volume.
  • the top of the growing zone is open to allow for feeding of the fish.
  • Bird netting may however be placed over the top of each growing zone 20, or alternatively over the entire fish farm, to prevent fish being eaten by birds.
  • Automatic feeders 17 are placed over the growing zone and timed to drop feed into the growing zone.
  • Tank 32 is also rectangular box-shaped and contains access openings 34 that are each in direct communication with one growing zone such that fish contained in that growing zone can access the tank through the respective opening 34.
  • Openings 34 are closeable by way of vertical sliding doors 35, and most of the time the doors are in a closed position while the fish are kept in the growing zones 20. Doors 35 slide within door frames 36 mounted on the periphery of opening 34.
  • a barrier in the form of a grader 25 (illustrated in Figure 10) is dropped into the end of the growing zone furthest from the tank 32 and moved toward the open opening 34 in the tank.
  • Grader 25 includes a support frame 26 mounted on two pairs of wheels 27 where the wheel pairs are separated by a distance larger than the gap 14 between two rows of floating members 12. Accordingly the support frame 26 can be positioned across gap 14 and above growing zone 20 by placing each pair of wheels on an upper surface 16 of opposite floating members across gap 14.
  • Support frame 26 carries a gate 28 which can be raised and lowered within guide slots 29 in support frame 26.
  • gate 28 which is rectangular, spans across most of the width of the growing zone so to urge fish to swim in the direction that the grader moves. While the grader is not illustrated positioned within a growing zone, it can be imagined from Figure 2 that the grader straddles and rolls on floating members 12 from one end of growing zone 20 to the other with gate 28 submerged in water.
  • Gate 28 has sizing bars 41 for sizing fish as the grader moves along the growing zone. Fish having a size greater than the spacing between the sizing bars 41 will be carried with the grader toward to the tank, while smaller fish will be able to swim through the grader. This is useful for grading the fish, for example, to separate the fish according to size, or during harvesting, to harvest only those fish above a certain size.
  • Different sized fish may be herded by changing the spacing between sizing bars 41. This can be achieved by replacing gate 28 in support frame 26 with another gate having wider or reduced sizing bar spacing.
  • Tank 32 is also provided with a moveable barrier in the form of a pusher 37, which is shown in Figure 2.
  • Pusher 37 illustrated more closely in Figure 11, is similar in form to grader 25 in that it has a support frame 38 adapted to straddle the open tank and is supported by two pairs of wheels 39 with each pair resting on opposite floating members.
  • Pusher 37 has a gate 40 that herds the fish toward an opening 34 in the tank and back into a growing zone after processing. Accordingly, in the embodiment illustrated pusher 37 does not contain sizing bars.
  • Pusher 37 is also used during harvesting to herd the fish to one end of the tank to allow the fish to be manually harvested using nets or by mechanical means, such as a fish pump.
  • Tank 32 in the embodiment shown is made of four modular and identical tank components 43 joined together with end walls 44 to form tank 32.
  • tank components 43 are manufactured in plastics, by rotational moulding, and are joined by plastic welding.
  • the tank may be made of components of metal, composites or other suitable material .
  • FIG. 5 (a) illustrates a tank component at one end shorter than the others: tank components may be cut to size as desired.
  • the modular nature of the tank components allows any length of tank to be constructed, depending on the desired configuration of the overall fish farm.
  • the floating members 12 are constructed by a series of modularIy joined pontoons 50.
  • the pontoons are rotationally moulded in plastics, but may be made from other suitable materials including metal or composites.
  • the pontoons are hollow.
  • the upper surfaces 16 of the pontoons are designed as walkways to allow persons access around the entire floating structure. The surfaces 16 also support the wheels of the net and tank barriers 25, 38 and in some circumstances where distances are great, the pontoons may support 2 -wheeled vehicles such as motor bicycles.
  • Figure 1 illustrates the preferred configuration of the floating member structure, namely tank 32 centred and surrounded by pontoons 50 with rows of pontoons 50 (in this case five) extending in opposite directions laterally of the tank such that each access opening 34 in the tank is aligned with a gap 14 between each pontoon row.
  • This base system of modular components comprises one module of 50 pontoons and 4 tank components to form the floating structure illustrated in Figure 1. Further tank components and pontoons may be added as desired.
  • FIGs 5(b)-5(d) illustrate how the tank 32 is attached to the stabilising pontoons surrounding it.
  • the tank may not necessarily be buoyant itself but can rely on the buoyancy of the pontoons.
  • Figure 5(c) shows that tank 32 has a greater depth than the depth of the pontoons and that the tank is supported by hooking the tank edge 45, which is lipped, onto a ridge 52 on the external circumference of a pontoon.
  • FIG. 5 (d) shows an enlarged view of the tank/pontoon connection.
  • tank edge 45 has attached on its underside a downwardly facing C-section plate 53 that hooks over and seats on ridges 52 on the surrounding pontoons to stably interconnect the tank to the surrounding pontoons .
  • Figures 8 (b) and 8(c) illustrate C-sectioned side rails 47 adapted to insert into a corresponding recess 48 on the pontoon upper surface 16 and are screwed into position.
  • Rails 47 made of galvanised steel, allow for the connection of various ancillary and essential items to the pontoon including net hooks 23, handrails, automatic feeders 17, bird netting poles 49 and security gates. Where the tank 32 locates over the edge of a pontoon, rail 47 is replaced by the C-section plate 53 which is attached to the tank edge 45.
  • the pontoons 50 themselves are interconnected to each other to form the floating members 12.
  • Each pontoon may ⁇ be connected to another pontoon: end-to-end (as shown in Figures 7 (a) and 7 (b) ) ; side-to-end (as shown in Figures 6 (a) and 6 (b) ) ; and side-to-side (as shown in Figure 9).
  • the relative connection between the pontoons may be rigid or pivoting.
  • a rigid connection ensures no relative movement between the pontoons while a pivoting connection allows a degree of pivot between the pontoons to allow, for example, wave motion of water in ocean conditions which can strain and damage the pontoons if rigidly- connected.
  • the degree of pivot of the pontoons When connected end-to-end the degree of pivot of the pontoons will be about ⁇ 4.5°-5.0°. When connected side-to-end the degree of movement will be about ⁇ 3.7°- 4.2°.
  • connection configurations is possible by way of a pinning system on each pontoon that comprises a first flange set 55 at one end and a second flange set 56 at the opposite end.
  • Each first and second flange set contains two flanges protruding from the pontoon.
  • Second flange sets 56 are also provided on each side of the pontoon toward one end. There are therefore four points of attachment to each pontoon.
  • Figures 8 (a) - 8(f) illustrate a pontoon from various views. The flange sets 55, 56 are clearly seen in these drawings.
  • the first flange set 55 contains through-holes 57 and is designed to interleave with the second flange set 56 which contains corresponding through holes 58.
  • An upper hole and a lower hole are provided on each flange.
  • Pins 59 extend through one or both through-holes 58 in each flange and through each corresponding hole through the interleaved flange sets.
  • Caps 54 are placed on the ends of pins 59 to prevent the pins from falling out of the holes.
  • pins 59 are inserted through both upper and lower through-holes 58. For a pivoting connection only one pin is inserted through either the upper through-holes or the lower ones.
  • the pontoons 50 are moulded with water receiving grooves 51 on the underside of the pontoon to promote buoyancy and structure stability in the water.
  • the upper surface 16 of the pontoons is provided with a rough finish to create a non-slip surface.
  • Aerators (not shown) aerate the water in the fish farm to maintain oxygen saturation levels at optimum levels.
  • the present fish farm provides a marked improvement in the yield of fish. There is minimal human handling because all transfer of fish is carried out by herding the fish from area to area using barriers. Consequently, a greater number of fish can be transferred at any time by a single operator. This in turn reduces the amount of labour required, for example, one full time operator is able to monitor four modules, where one module consists of the base fish farm illustrated in Figure 1. Compared to known fish farms where one operator is only responsible for 10,000kg of fish, with the present fish farm one operator can handle in the order of 360,000kg.
  • the modular nature of the fish farm allows it to be constructed to suit any water environment and any shaped water body.

Abstract

L'invention concerne une pisciculture comprenant une structure d'éléments flottants devant être amenés à flotter sur l'eau, pour définir au moins une zone limitée, immergée, de développement de poissons et au moins une zone limitée, immergée, de traitement de poissons, les zones étant interconnectées, les poissons étant conduits de la zone de développement à la zone de traitement par une barrière mobile.
PCT/AU2008/000288 2007-03-01 2008-03-03 Pisciculture WO2008104035A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2008221244A AU2008221244A1 (en) 2007-03-01 2008-03-03 A fish farm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007901061A AU2007901061A0 (en) 2007-03-01 A fish farm
AU2007901061 2007-03-01

Publications (1)

Publication Number Publication Date
WO2008104035A1 true WO2008104035A1 (fr) 2008-09-04

Family

ID=39720798

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/000288 WO2008104035A1 (fr) 2007-03-01 2008-03-03 Pisciculture

Country Status (2)

Country Link
AU (1) AU2008221244A1 (fr)
WO (1) WO2008104035A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010139831A1 (fr) * 2009-06-01 2010-12-09 Unda Desarrollos Tecnológicos Marinos, S.L. Structure de cage modulaire pour engraissement de poulpes
EP2787806A4 (fr) * 2011-12-09 2015-09-30 Akvadesign As Élément flottant et procédé de formation d'un système de flottabilité

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086875A (en) * 1976-09-16 1978-05-02 Union Carbide Corporation Grading live fish under water
FR2439548A1 (fr) * 1978-10-24 1980-05-23 Streichenberger Antonius Perfectionnements aux dispositifs d'aquaculture
GB2163331A (en) * 1984-08-25 1986-02-26 Jim Jensen Fish farm for raising fish in the open sea
GB2184631A (en) * 1985-11-06 1987-07-01 Bridgestone Corp Fish breeding apparatus
GB2227634A (en) * 1989-02-04 1990-08-08 Lithgows Ltd Fish farm structure
SU1685330A1 (ru) * 1989-06-13 1991-10-23 Клайпедский Филиал Научно-Производственного Объединения По Технике Промышленного Рыболовства Устройство дл сортировки живой рыбы в бассейне
WO2001052637A1 (fr) * 2000-01-17 2001-07-26 Industri- Og Prosjektutvikling As Dispositif et bassin d'elevage d'organismes aquatiques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086875A (en) * 1976-09-16 1978-05-02 Union Carbide Corporation Grading live fish under water
FR2439548A1 (fr) * 1978-10-24 1980-05-23 Streichenberger Antonius Perfectionnements aux dispositifs d'aquaculture
GB2163331A (en) * 1984-08-25 1986-02-26 Jim Jensen Fish farm for raising fish in the open sea
GB2184631A (en) * 1985-11-06 1987-07-01 Bridgestone Corp Fish breeding apparatus
GB2227634A (en) * 1989-02-04 1990-08-08 Lithgows Ltd Fish farm structure
SU1685330A1 (ru) * 1989-06-13 1991-10-23 Клайпедский Филиал Научно-Производственного Объединения По Технике Промышленного Рыболовства Устройство дл сортировки живой рыбы в бассейне
WO2001052637A1 (fr) * 2000-01-17 2001-07-26 Industri- Og Prosjektutvikling As Dispositif et bassin d'elevage d'organismes aquatiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199230, Derwent World Patents Index; Class P14, AN 1992-248256 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010139831A1 (fr) * 2009-06-01 2010-12-09 Unda Desarrollos Tecnológicos Marinos, S.L. Structure de cage modulaire pour engraissement de poulpes
ES2364717A1 (es) * 2009-06-01 2011-09-13 Unda Desarrollos Tecnologicos Marinos, S.L. Estructura de jaula modular para engorde de pulpos.
EP2787806A4 (fr) * 2011-12-09 2015-09-30 Akvadesign As Élément flottant et procédé de formation d'un système de flottabilité
US9321511B2 (en) 2011-12-09 2016-04-26 Akvadesign As Floating element and method of forming a buoyancy system

Also Published As

Publication number Publication date
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