CN1178448A

CN1178448A - Fish Bait

Info

Publication number: CN1178448A
Application number: CN96192558A
Authority: CN
Inventors: P·莫顿; O·M·卢迪
Original assignee: Norbait Da
Current assignee: Norbait Da
Priority date: 1995-03-15
Filing date: 1996-03-12
Publication date: 1998-04-08

Abstract

A fish bait (1) is provided in which individual pieces of bait material (2) are suspended and evenly distributed throughout a homogenised mixture of bait material and a gelling agent (3), and enclosed in a supporting tubular mesh (4). The fish bait is obtained by mixing bait material with a gelling agent to form a substantially homogeneous mixture, adding further bait material to the homogeneous mixture so that bait material is suspended in the homogeneous mixture and extruding the suspended mixture into a mesh tube and subsequently allowing the gelling agent to set. Once set, the gelling agent stabilizes the suspended structure of the fish bait and allows the controlled release and diffusion of attractants. Preferably, the gelling agent is an alginate.

Description

Bait

Technical field

Long line fishing is a kind of method of commercial fishing, and several thousand nooses are arranged on the long line, is connecting the hook that bait is arranged on each noose, and long line is suspended in the sea.Then together the long coil of wire, the fish that acquisition is simultaneously caught, a characteristic that principal element is a bait of this fishing method success, promptly bait to the attractability of fish and whole long line launch fishing during bait be retained on the hook and keep the attractive state of fish. Background technology

EP-B-0474660 discloses a kind of bait that is suitable for long line fisheries industry, comprises the natural bait that is cut into short section that is enclosed in the porous shell.Shell is made of semipermeable membrane and webmaster.The net shell provides structural strength and guarantees hook fixing bait for the filling of bait.Semipermeable membrane is protected natural bait to allow temptation to see through simultaneously and is entered and attracts fish in the seawater.The result who strengthens webmaster remains on the hook this bait, and makes bait keep effectively long-time owing to attractant contained in the bait slowly sees through semipermeable membrane.This bait is compared with for example living fish piece, more clean during use simpler, and because it can be made into the size of conformance to standard, more effective when launching, particularly using automatically upward the bait machine with many hooks line. The present invention's summary

According to a first aspect of the invention, bait is enclosed in and supports in the tubular reticulum, contains the independently bait piece of suspension and is evenly distributed in the mixture of whole uniform bait and gelling agent.

According to a second aspect of the invention, a kind of method that is used to prepare bait comprises:

(1) bait and gelling agent are mixed the basic mixture uniformly of formation;

(2) in homogeneous mixture, add bait in addition so that bait is suspended in the homogeneous mixture; With

(3) mixture that suspends is clamp-oned in the webmaster, gelling agent is solidified.

The gelling agent that is fit to comprises alginates, guar gum, carrageenan, agar, pectin, gellan gum, xanthan gum and gelatin.In case solidify, gelling agent has been fixed the suspension structure of bait and has been allowed sustained release attractant and diffusion as the described bait of EP-B-0474660.Preferred gelling agent is alginates.Alginates are the nontoxic biopolymers that extract from brown seaweed, provide with form of powder.It must mix with water before forming gel.Alginates are gelling agents that cold cut is separated cold curing, have therefore simplified mixed process.

The preferred gel inhibitor that is also referred to as sequestering agent that adds is used for preventing the curing that gelling agent is too early.Preferred gel inhibitor is a tetrasodium pyrophosphate salt.

Preferred bait contains natural material.The natural bait that is fit to comprises full fish, broken fish, mollusk or their conversion product and matrix thereof.Bait also can contain artificial chemical inhibitor, but preferred bait only contains natural material.

The adding of preferred these process steps 2 bait mixed to reach the size of bait particle gradually through two steps or multistep.Preferred refrigeration or particularly freezing this bait.

More preferably the bait that is added in the homogeneous mixture in step 2 also contains the bait piece, they in homogeneous mixture mixed one section time enough so that bait is distributed in the whole mixture breaking without any big degree.Preferred bait piece mixes adding through two steps or multistep.

Preferably before the extruding suspended mixture, add the gelling activator.Under the situation of using alginates, the gelling activator is divalence, trivalent or multivalent metal cation preferably.Preferred gelling activator is a calcium salt soln.Most preferred gel activator is the solution of calcium sulphate.This activator is offset the influence of any gelling inhibitor and is made alginates gelling in bait.Preferably the gelling activator is joined in the suspended mixture with mixer on the pipeline.

Suspended mixture can directly be clamp-oned webmaster and make the gelling agent spontaneous curing through a geat.Yet the bait that preferably is extruded is subjected to the effect of gelling activator, makes the adhesive curing at the surf zone of the bait that is extruded, and forms semi-transparent crust.The subsequent processes of the bait that this helps being extruded, and prevent that bait is from the tubular reticulum seepage.When using alginates, preferred gel activator comprises divalence, trivalent or multivalent metal cation.Preferred gelling activator is a calcium salt soln.Most preferred gelling activator is a calcium chloride solution, and it can make the surperficial alginate gel of the bait that is extruded solidify rapidly, forms crust.Calcium salt soln can place a bath, and the bait that is extruded therefrom passes through, but preferably calcium salt soln is sprayed onto on the bait that is extruded, and hydroblasting is removed excessive solution then.

Preferably before being pressed against in the webmaster, suspended mixture adds a kind of packing material.

Preferred packing material contains a kind of metal silicate of layering.Other alternative material comprises starch and maltodextrin.The example of the metal silicate of the layering that is fit to is magnesium silicate and alumina silicate.These packing materials have increased the volume of bait, help prevent through the tubular reticulum seepage, and have accelerated gelatinization.It has also improved the buoyancy of bait.Conversion product of fish and matrix also are the fillers that is fit to.

Mixed process can be carried out in rotating cutting machine or other industrial rubbing, cutting and mixing apparatus.

Preferably the blend step in technology reduces the temperature of mixture to prevent the destruction of excitatory substance chemical composition in the bait.This can reach by precooling or particularly freezing bait.The rotation cutting machine that can select or additionally will use or the cooling of other industrial equipment.

Bait can be extruded into any suitable length and preferably be frozen subsequently.The bait of extruding can be freezing by a tunnel refrigerator before bin storage and transportation.In use, bait is partially thawed at least and pack into one and can be cut into bait on the automatic long line fishhook of shorter length in the bait system.More preferably thaw fully at last bait prebait.

Bait of the present invention is fit to all requirements of (fulfils) long line fisheries industry.This bait of evidence can successfully launch and obtain high yield with the bait machine of going up automatically commonly used.Importantly, the selection of natural bait can determine the kind of the fish that catches, in being to use bait of the present invention can accurately catch the fish of Special Category, thereby has only the sort of fish to be hunted down basically.In addition, this bait is a complete biodegradable, so environmental sound. Brief description of drawings

Embodiments of the invention illustrate with reference to the accompanying drawings, wherein:

Fig. 1 represents the flow chart for preparing the method for bait according to of the present invention; With

Fig. 2 represents the cross section of bait. Best mode for carrying out the invention

In first embodiment, the step 1 of Fig. 1 will be mixed in 12 premium on currency (12 kilograms) with 0.06 kilogram of tetrasodium pyrophosphate salt and a kind of gel inhibitor with 0.45 kilogram of alginates that trade (brand) name Protanal LF60 sells in the rotation cutting machine of industry.Rotate cutting machine low cruise 1.5 minutes, reruning 3.5 minutes at a high speed then.

In step 2, in rotating cutting machine, add 9 kilograms of the Mackerel bait of the precooling that contains head and waste offcuts, mixed at high speed 3.5 minutes.After this, in step 3, add Mackerel bait again and also mixed again 2.5 minutes for 9 kilograms.This mixed process has produced a kind of mixture of liquefaction, and wherein the particle size of bait is gradual change.The present temperature of mixture should be when freezing the high several years.Keeping the low temperature of mixture is important with the destruction that prevents excitatory substance chemical composition in the bait.

Next,, in rotating cutting machine, add 9 kilograms of Mackerel bait, mixed on low speed 1.5 minutes in step 4.In step 5, in rotating cutting machine, add 18 kilograms of Mackerel bait again, mixed gently 1 minute at low speed.Generated a kind of mixture like this, wherein solid bait fragment is suspended in the initial uniform mixture.

In step 6, the mixture of suspension is sent to a filler cells then and through mixer on the vane type pipeline of an industry, it mixes with the calcium sulphate soln of 22.5% concentration there.The flow velocity of calcium sulphate soln is decided to be 1 liter of about per minute.Calcium sulphate soln generally makes alginate jelly solidify at 20 minutes as the gelling activator.

In step 7, mixture is clamp-oned viscose rayon webmaster with medical similar 40 daniers through a geat under 5 bar pressures.The equipment of finishing this process use is similar to the type of use in the production sausage industry.Make the fleece pipe have the line of many weaknesses by subtracting pin from the industrial braider selectivity that is used for weaving webmaster.This fiber webmaster guarantees that bait can be retained on the hook when fishing, but when the fishing line is regained, can easily it be removed from hook with the system that brush fixing or rotation is arranged.Common pending trial UK Patent Application (proxy number SNR 05268GB) the applicant of on March 7th, 1996 application has been described this characteristic in more detail.

In step 8, the bait process that is extruded has the bath of the calcium chloride solution of 3% concentration.Calcium chloride solution plays the fast gelation activator, forms epidermis with making gel solidification after the alginates on bait surface contact.

At last, in step 9, bait is cut into about 1 meter length, lies in the case before freezing.

Fig. 2 represents the cross section of bait 1.As shown in the figure, independently bait piece 2 is suspended, and is evenly distributed in whole uniform bait mixture and the gelling agent 3, and is included in the supported tubular net 4.The porosity characteristic of net 4 allows a small amount of bait uniformly to see through net and forms a skin 5, and the major part with bait is retained in the tubular reticulum simultaneously.The thickness on top layer 5 at 2mm between the 2.5mm.

As a selection, in step 6, the metal silicate of about 4.5 kilograms of layerings also can be added in the mixer on pipeline in the mixture, for example magnesium silicate and alumina silicate.The metal silicate of layering plays packing material, helps prevent through the tubular reticulum seepage, and has generally accelerated gel process.It has also improved the buoyancy of bait.

In another embodiment, the natural bait that adds in step 2 and step 3 is Salmon, is made up of the mixture of head and waste offcuts usually, and the solid bait that adds in

step

4 and 5 is Herring.

The natural bait that can select to be used to form bait of the present invention is used for catching special fish.For example, found that above-mentioned Mackerel mixture is effective especially to catching Haddock.

Other spendable suitable natural bait comprises sardine, Caplin, Horse Mackerel and Squid.

As a rule, think the bait mixture should comprise about 0.5-1%wt alginates, 0.1-0.2%wt tetrasodium pyrophosphate salt, 20-25%wt water, at the 25-35%wt of

step

2 and 3 bait, at the 40-45%wt of

step

4 and 5 solid bait and 7.0-10%wt filler.

Claims

1. method that is used to prepare bait comprises step:

(1) bait and gelling agent are mixed the basic mixture uniformly of formation;

2. by the process of claim 1 wherein that gelling agent is alginates.

3. by the method for claim 1 or 2, wherein add a kind of gel inhibitor, be used for preventing the curing that gelling agent is too early.

4. by each method in the aforesaid right requirement, wherein bait only contains a kind of natural material.

5. by each method in the aforesaid right requirement, wherein the adding of the bait in the method step 2 mixed to reach the size of bait particle gradually through two steps or multistep.

6. by the method for claim 5, wherein refrigerate or the freezing bait of part.

7. by each method in the aforesaid right requirement, wherein also contain the bait piece at second bait that is added in the homogeneous mixture of step, they in homogeneous mixture mixed one section time enough so that bait is distributed in the whole mixture breaking without any big degree.

8. by the method for claim 7, wherein the bait piece mixes adding through two steps or multistep.

9. by each method in the aforesaid right requirement, wherein before the extruding suspended mixture, add the gelling activator.

10. by the method for claim 9, wherein the gelling activator is joined in the suspended mixture with mixer on the pipeline.

11. by each method in the aforesaid right requirement, the bait that wherein is extruded is subjected to the effect of gelling activator, makes the adhesive curing at the surf zone of the bait that is extruded, and forms semi-transparent crust.

12. by the method for claim 11, wherein the gelling activator is placed in the bath, the bait that is extruded therefrom passes through.

13. by the method for claim 11, wherein the gelling activator is directed onto on the bait that is extruded, hydroblasting is with excessive removing then.

14. by each method among the claim 9-13, wherein the gelling activator comprises divalence, trivalent or multivalent metal cation.

15., wherein before suspended mixture is pressed against in the webmaster, add a kind of packing material by each method in the aforesaid right requirement.

16. by the method for claim 15, wherein packing material contains a kind of metal silicate of layering.

17. by each method in the aforesaid right requirement, wherein mixed process is carried out in rotating cutting machine or other industrial rubbing, cutting and mixing apparatus.

18. by each method in the aforesaid right requirement, the bait of wherein extruding is freezing by a tunnel refrigerator.

19. a bait contains the independently bait piece of suspension and is evenly distributed in the mixture of whole uniform bait and gelling agent, is included in to support in the tubular reticulum.

20. by the bait of claim 19, wherein gelling agent is alginates.

21. by each bait in the claim 19 or 20, wherein bait only contains a kind of natural material.

22., wherein also contain packing material by each bait among the claim 19-21.

23. by the bait of claim 22, wherein packing material contains a kind of metal silicate of layering.