WO1994006281A1

WO1994006281A1 - Active guiding system for un-stressed guiding of living fish in water

Info

Publication number: WO1994006281A1
Application number: PCT/DK1993/000292
Authority: WO
Inventors: Steenstrup Claus Resen; Steenstrup Per Resen; Steenstrup Jens Resen; Kim Christiansen; Rasmussen Anders Ishoey; Jan Soerensen; Hans Henrik Haraldsted
Original assignee: Reson System A/S
Priority date: 1992-09-22
Filing date: 1993-09-13
Publication date: 1994-03-31
Also published as: DK167641B1; DK117292A; AU4945793A; DK117292D0

Abstract

Active guiding and leading system (2, 5, and 6) for wet-sorting and un-stressed guiding (6') of living fish (3) in water, where every single fish (3) first has been brought through an arrangement of measuring (2) for direct guiding (6) of the just taken data from the measuring cell, and after this to be guided (6) in a swimming state to the specified area (4 and 4') relating to respectively weight and volume of the actual fish (3). The guiding arrangement (5 and 6) in a distance (7) especially from 1 to 5 lengths of fish (3) from the exit of the measuring cell (2) continuous guided only here can give admittance to one area of sorting (4 and 4') via an automatical exposure (1) of the opening of admittance (5 and 5'), and that the speed (14) on the exposure (1) especially ideal can take place (14) with same speed (8) as the swimming speed (8) of the actual fish (3).

Description

ACTIVE GUIDING SYSTEM FOR UN-STRESSED GUIDING OF LIVING FISH IN WATER.

The invention relate to an active guiding and leading system for wet-sorting and un-stressed guiding of living fish in water.

Hithertho one have only known passive systems of sorting of living fish, which will say that one often manual have forced or guided the fish down or to and often in big continuous quantities to an apparatus of sorting, where they often by theirs weight as on account of stress and fear have tried by own force to move and hurry away.

There are known systems, where one have arrangments of grate with different spaces. One pour by this normally metod the catch fish down on the grate, by which the biggest as the smallest can be sorted reasonable. As still some of the small fish aslo will be able to go down between the big spaces of the grate.

By this system there is very big disadvantages connected, as one for the firat shall catch the fish or hunt it to a system of grate, by which the fish get stress. Further one have also be obliged to starve the fish before one was going to sorte them, which also have given the fish further stress. And often has a sorting of grate caused that a lot of fish have hung in theirs gilles, or have got the back brooken and have destroyed the fines because of the heavy-handed treatment. It has therefore take long time before the fish again were starting to take normally quanta food, and the meat of the fish has also been detriment bacause of the factors of stress. As an example are there valid for mammal as pigs, that their meat by stress symptoms, will be very aqueous and light, and the teast will change to the poore. A like phenomenon is valid for as an example salmon and other fish.

The purpose of the invention is to obtain an active wet- sorting of the single fish without that it must be hunted, touched and therefore very stressed and puzzled. And where it in the end of the phase easy has been guided to its own specified area of seperation.

This can be obtained according to the invention by, that every single fish first is brought to swim through an arrangment of testing cell, for direct guided via the just taken data here subsequent, to be guided in a swimming state to the specefied area relating to respec- tively weight as volume of the actual fish.

The active guiding system is placed so after the testing cell that there here immediate for the fish not is any guick and reasonable seen distrubting movable parts. This has been found first into a sertain fitted distance from the exit in the testing cell to the actual opening of seperation of the area, where the movement of the guiding mechanisme in its speed and the direction of movement further is fitted so, that it generally is fitted to and harmonized to the speed of the swimming and to the direction of the movment of the fish, why the guiding system not is working distrubting and stressed on the sorted fish.

In a specially embodyment for the guiding mechanisme accoding to the invention, then can the system exist of especially two with each other connected and sliding cover or gates for openings of admission for the area of sorting. And the gatess can ideal be placed in an angle on as an exampel mutual on about 90 grades, and with an angel in proportion to the direction of swimming for the fish as the axis of symmetry for the unit on 45 grades, and that the cover or the gates shut or open for the specified area of seperation, but still so that, when the one cover is open then is the other shut.

In another specially embodyment for the guiding mecha¬ nisme according to the invention can the guiding system exist of a movabel corridore lock there is with a fixed hung at the measuring cell, and movabel or turnable to the one opening of admission and respectively the other opening of admission depend on the actually found weight and size for the actual through-swimming fish.

In another specially embodyment for the guiding mecha- nisme according to the invention can the guiding system be equiped with a current-carrying but isolated conductor in the side direction or in both sides for invisible field guiding and leading of the fish to the actual area.

Favourable modified embodyments for the inventions appears further of the dependent claims 2-7.

The invention has been explained neare in the following under reference to the figures of the drawing, where

Fig.1 shows an active guiding and leading system with measuring cells,

Fig.2 shows an active guiding and leading system with inclined openings of admission to the area of seperation, and

Fig.3 shows an active guiding and leading system with turnabel leading section for the openings of admis¬ sion to the area of seperation. Fig.l shows an active guiding-and leading system with a measuring cell (2), where the single fish (3) is guided (6 and 5) through. As an example will the present system (2,5 and 6) be ideal for circular basins or tanks, where the fish (3) often because of the circular water- stream are swimming in ring, and then via a funnel-shaped arrangmnet of net ideal placed at the outer periphery of the basin individually can be guided to and through a testing- or a mesauring cell for automatical registering of volume and the weight.

The data of the measuring cell (2) can now activate (1) the admittance to the specified area of seperation (4 or 4' ) for the actual fish (3), as there as an exampel as shown on Fig.1 can be opened (5) or can be shut (5' ) an opening of admittance (5 or 5'). But still so that the admittance to the opporsite area (4 as 4' ) has been shut, and so that the movement of shutting/ and opening (14) not will bring elements of distrubting and stress in the actual swimming pattern or the rhythm of the fish (3) . The admittance (6' ) to the area of seperation (4 as 4' ) can ideal be placed 1-3 lengthes of the fish (7) from the exit side on the measuring cell (2).

Fig.2 shows an active guiding -and leading system (9 and 9') with inclined placed (12) opening of admit¬ tance (5 and 5' ) to the area of seperation (4 and 4' ), where the openings (5 and 5' ) can be activated (14) as an exampel via some sliding shutter or gates (9 and 9' ), as ideal can be connected together according to the movement via a central placed arrangment of rollers (10) with wires to each of the shutters so, that when the one open, then shut the other in same stroke or time with same speed.

The system (9, 9'and 11) can ideal be guided so, that the gates (9 and 9' ) have been shut or have been opened with about the same speed (8) as the fish is swimming, and the speed (8) with which the fish especially the salmon (3' ) is passing (8' ) through the system (2, 5 and 5' ) can laid on about 1 second.

An ideal angel (12) for the visibility of the opening of admission (5 and 5') for the fish (3) is, that the gates (9 and 9' ) are placed with an angle on 45 grades (12) in proportion to the center line for the system. The way of admittance (6 and 11) from the exit of the measuring cell (2) to the gates of the seperations area (9 and 9') can ideal be made conical (11') with the smallest diameter at the measuring cell (2) to the bigger diameter at each its outer side of the admittance ways (5 and 5' ) .

Fig.3 shows an active (2 and 3) guiding -and leading system with revolving (17) section of guiding

(15) for the openings of admittance (5 and 5') to the areas of seperation (4 and 4' ), as a pip-guiding section lead (6) the actual fish (3) to (6' ) the actual area of seperation (4 and 4' ).

The guiding section (15) is as an exampel ideal made conical shaped, and besides surrounded of fishing net

(16) on a frame. Where the fishing net (16) ideal could have a visible size of mesh (16) there as an exampel for salmon is from 25 millimeter to 50 millimeter, and with a with a visible net (16), where the diameter of the thread is so, that the sensors of the measuring on the fish anlong each sides of the fish (3' ) can feel the whole fishing net (16) as an un-stressed wall (15 and

Claims

CLAIMES.

1. Active guiding -and leading system (2, 5 and 6) for wet-sorting and un-stressed guiding (6') of living fish (3) in water, c h a r a c t e r i s t i c of, that every single fish (3) first has been brought through an arrangement of measuring (2) for direct guiding (6) of they just taken data from the measuring cell, after this to be guided (6) in a swimming state to the specified area (4 and 4' ) realting to respetively weight and volume of the actual fish (3).

2. Guiding -and leading system (2, 5 and 6) for wet- sorting and guiding (6) of living fish (3) in water according to claim 1, c h a r a c t e r i s t i c of, that the guiding arrangement (5 and 6) in a distance (7) especially from 1- to- 5 lenghts of fish (3) from the exit of the measuring cell (2) continuous guided, only here can give admit to one area of sorting (4 and 4' ) via an automatical exposure (1) of the opening of admittance (5 and 5' ), and that the speed (14) on the exposure (1) especially ideal can take place (14) with the same speed as the swimming speed of the actual fish (3).

3. Guiding -and leading system (2, 5 and 6) for wet- sorting and guiding (6) of living fish (3) in water according to claims 1, c h a r a c t e r i s t i c of, that the system (2 and 9) can exist of especially 2 with each other connected and slideable (14) cover or gates (9 and 9' ) for the openings of the admittance (5 and 5' ) to the areas of sorting (4 and 4' ), and that the gates (9 and 9' ) ideal can be placed in a angle (12) on about 90 grades (13) mutual, and with an angle (12) in proportion to the direction of the swimming (8) for the fish (3) as the center line for the aggregate on 45 grades (12), and that the gates (9 and 9') respectively shut (14) as open (14' ) for the specified area of seperation (4 and 4' ), so that when the one gate is open will the other be shut.

4. Guiding -and leading system (2, 5 and 6) for wet- sorting and guiding (6) of living fish (3) in water according to claims 1, c h a r a c t e r i s t i c of, that the guiding system ( 6 and 15) can exist of a movable sluice (15) there is fixed hung (18) at the measuring cell (2), and movable or revolvering (17) to the one opening of admittance respectively the other opening of admittance (5'and 5) depend on the actual found weight and size for the actually through swimming (8) fish (3).

5. Guiding -and leading system (2, 5 and 6) for wet- sorting and guiding (6) of living fish (3) in water according to claims 1, c h a r a c t e r i s t i c of, that the guiding aggregate (11 and 15) ideal can be limited (11 and 15) of a visible and one for the fish (3) sensible fishing net (16) with one for the fish (3) fitted mesh size (16') and thread size, as there as an example for a salmon ideal can be used a mesh size on about 25-50 millimeter and a thread size on 1-3 mil¬ limeter for the thread (16") for ideal obtaining of un- stressed guiding (6) of the fish (3) in the aggregate.

6. Guiding -and leading system (2, 5 and 6) for wet- sorting and guiding (6) of living fish (3) in water according to claims 1, c h a r a c t e r i s t i c of, that the guiding system (15 and 11) can be equiped with current-carrying isolated conductors in the side position or in both sides (11 and 15) for guiding (6) and leading (6) of fish (3) to the actual area (4 and 4' ) .

7. Guiding -and leading system (2, 5 and 6) for wet- sorting and guiding (6) of living fish (3) in water according to claims 1, c h a r a c t e r i s t i c of, that the guiding system (15 and 11) can be equiped with a light-source as an example for ultra-violet light or infra-red light dependent of the species of fish (3), and that there has been lighted continuous or flicken possibly in forward pointing waves-units.