LU81311A1 - DEVICE FOR BREEDING SNAILS AND ITS APPLICATION - Google Patents

Description

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i! ! : I ·. The present invention relates to a device - sssssssssêàè r! ·! "Bî., - fc-Lyn for the breeding of snails and its .application.

* »! Î The technical sector considered is that of activities. :; »J î] rural and more particularly, the breeding of snails.

i (! 0 | 5 d | The traditional harvest of these animals is not sufficient to

In response to considerably increased needs. These require a | d 1 d! | import from major producing countries. It was therefore necessary to compensate for the insufficiency; j. sance of the natural contribution and consider an industrial, ^ breeding. For this purpose, ^, j {·; On which the snails move, * "|| it has been proposed to multiply the "bonding surfaces" outside the ground! i; 10;) by planks, large superimposed tables. In this case, the inconvenience! j ï | The main thing is to only be able to multiply by two such surfaces.

j I *:! : In addition, problems arise. It is necessary to prevent the escape of snails, j: it is necessary to bring them humidity and food, essential for their growth, it is also necessary to avoid to raise them in great number, this favors the spread of epidemics and there, mortality, j For a good profitability, it is therefore necessary to multiply | bonding surfaces in a minimum of volume, while maintaining low j! | populations in a tight, humid enclosure.

- i · · The main objective of the invention is to solve this problem £ 0: by proposing a device meeting the optimal criteria for snail farming.

This objective is achieved by an independent column of superimposed cells, characterized ^, in that said column comprises, at its ps-tie ·. 1 upper, a water supply and runoff surfaces of inclined slope, arranged one above the other and humidified by. said feed, each cell having its own surface run-off and at least two tanks.

"Preferably, said flow surfaces: siting of adjoining cells are crisscrossed slopes, such that the bungs: it 30 for evacuating said surfaces are 2 in 2. Vertically aligned; the ~ so-called trays intended for egg-laying snails contain a substrate whose approximate height is between 3 and 5 cm and are made of a transparent material.

They contain, preferably, a substrate composed of firc 35 earth preferably taken from the group of the following products: loose soil, planting material: .s? Ferreau? river sand and a moisture absorber, preferably · taken from the group of the following products perixte, Vermiculite, peat.

They can be fitted with an * glass arranged at a slight distance t I '* i y *' ·· r? i. ; : in said: substrate ^ and have ventilation holes. % 1 ’In a preferred construction mode, they are mounted • j. smoothing on horizontal struts and their bottom is located at one! it level higher than the surface of runoff. This layout is not -1 ΐ; tj-. ! essential.

; j:: Sj Each cell further comprises at least one vertical door i; ; ; tightly locked in horizontal grooves.

i i î ^ * m 4 t s | The device further comprises at least one incubation cell '' *; ; II tion consisting of a tray containing a substrate in which are distributed 110; * egg-laying, extracted from an egg-laying tank, and by an inverted empty tank, j j i covering the first tank, said empty tank being preferably traversed: · î in its center by a tube containing a food powder ^ used after hatching. Said incubation cell preferably contains an i j. ‘J substrate whose approximate proportions of fine earth and absorb-r i · *! 15î * are respectively 1/3 and 2/3 and a thin layer of substrate covered i! J laying "we can also put only peat. j! There Tl-, 1 annli.catiQji of .this device: b invention also relates to snail breeding,. i ____. _ used for „. . .

I lent so much. ; ».... j- · ^. re 111 s Gris d Algérie, Helix Aspersa, Luco- - '. rum or ’lbmatîa, characterized by the following stages:; 20:“ During mating-laying, a temperature is maintained tu -, j i i j | inside said cells, between 15 and 18 ° C; ! | | - the eggs are collected periodically and distributed in islands! j j ί he incubation tanks and a temperature of 9 oen is maintained in them. 0 „·" / Checking "j for x days, x and υ being variable and r the relation x.6 = 18.21; 25 ·: “during the infant growth stage lasting approximately two to four weeks after hatching, the newborns are kept in said incubation cells; and they are fed through the tube; j · - during the juvenile growth stage, the upper empty tray J is removed constituting said incubation cell and the • 30 are fed; j young snails every 2-3 days, the temperature being maintained between 15 and 18 ° C, inside the cell.

The result of the invention is a new product consisting of a device for breeding snails-as well as application The main advantage of the invention is to provide a unit. - -, - ^ (on which the snails move) independent realizing a collag ^ Eaximal / m- surface of occupied soil, the height of 1 unit being preferentially that of a man, and this under optimal conditions of reproducibility and fattening of escaigo-_s, humidity, temperature, brightness, volume, peri-'etfe er> seen ·· '*' Li_ □ «« *, • ji maximum, with a mortality rate-minimum. * *; :: The construction of these cells has been studied to have the:! advantages mentioned above while not excessively increasing the cost:! î: standard dimensions have been chosen: the cells can be easily assembled and disassembled to constitute units of a variable number: ï according to the requirements formulated.

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:! · The translucent or transparent material, according to the pieces, a 'j: · was, moreover ^ chosen to allow the passage of certain wavelengths î j Π acting on the reproductive or developmental faculties,

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IlOi! weight gain. .

i {^ îj I The results recorded prove the advantage of the invention on "":! ,,; ·. the economic plan On average, a cell produces 1,800 adult snails:! with a mortality of 300, throughout the fattening period.

| j The invention sees its application to the industrial breeding of; 15i j snails and more particularly of the Gray-cubs of Algeria. and Keliîq Aspersa Lucorumj ovj jPomatia. Other features and advantages of the invention will be! || better understood on reading the description, which will follow from an example of I -! ί embodiment and with reference to the accompanying drawings in which-: - Figure 1 shows a cross section of a column .20, - cells according to the invention; - Figure 2 shows a longitudinal section of said column shown in Figure 1, in a plane crossing the runoff surfaces and the bungs thereof; - Figure 3 shows u:?. longitudinal section of said column, passing through the tanks where the different stages of the farming process have been shown.

v In FIG. 1 is illustrated a column of cells, independent \ ^ j · and watertight where we will call, conventionally thereafter (but by way of nonlimiting example), A, "past · face", B, " anterior face "• 30d The column is divided vertically into two parts: ur.e" wet "part, occupied by runoff surfaces 8 suuernosCcs, and a" dry "part occupied by tanks 7, equal. · nt superimposed. The wet part is usually the place of mating and the dry Dartre / that of the laying.

35 'For a better permanent humidification of the column, a water supply is provided at the upper part 2 where a tale coming from the source E and leading to a drip 10 allows the continuous watering of the surfaces 8. Preferably these are this, inclined slopes of 2 in -2, intersecting cor.- ,? r.-nrésents * c „, - t * * _ ___ ...! .1 ... - ---—— · ”- - l.l, - ___- I ·; ’Les £ iêcilc-i · The drip is located at the top, _____:; : under cover 2, as far as possible from drain 9 from the surface *

-; : pius g-j ^ vée and we understand that the path traveled by the trickle of water J

! ; [describes a ziSzaS and is thus the Longest> ensuring an optimal humidity rate j j5; i '. L- * Wet part is, moreover, preferentially located, au- i i | above the drainage 11. Another advantage of this superimposed; ! j _ ’: H tion of Si1 (: runoff faces is the maintenance of the cleanliness of

I j i t5 * c cuvettes, is the place where animal excrement is deposited. He I

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*: M is enough and ^ y ^ a jet of water more powerful than the drip in!

lob- the upper bowl 8 to ensure the cleaning of all I

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i Ii bowls and drain by 11 "J

! ] [. it ^ i:? : the "dry" part is made up, for each cell, preferably of iSUX hacs 7> located at the same level. The one at the bottom of the tanks 7 days! dd is superior to that of bowl 8 of the same cell, in the d * 15 mode:! Realize 'iHustra here. This provision should not be viewed as an essential, but only incidental benefit. ‘. i | \. · I! I), 'each column is; in the exemplary embodiment cited as: * i î | i: example - limiting ‘n, composed of six cells. It is carried out at î - -::

From two vertical uprights 1, topped with a cover 2 and six, 20: horizontal spacers. These form: an angle 3 comprising a J

grooving, -pararieur 11, lower 12 allowing the locking of the rear doors 3 ^ and the sealing of the column. A certain game in the! groove; allows the door 13 to be recessed from the grooving 11 'at; the lift: and rotate it around a horizontal axis according to the 25 * arrows. C- then has access to the bowls 8 and to the drawers that can be pulled out? "A side B through the doors 14. ypossibility of sealingly blocking the doors is very important. On the one hand to ensure the maintenance of a hygroscopic rate j necessary for a hon development of snails, on the other hand for avoid · '^ 30; i the escape c 3 snails which, at night, try to lift the doors.

i "Λ - same principle of blocking by grooving is .'- applied to • doors 1- of 7a front face A. The" dry "part comprises, for · each this' jle> a horizontal Plate .5“, going from 'a vertical upright 1. to the other - this plate comprises, in the illustrated embodiment 35. here, two rectangular' ^ 'elements 6 corresponding to the dimensions of the sliding trays, which rest on slides 15, adjoining to the horizontal plates and · parallel to the uprights 1. These plates 5 compor. · 3 ^ · υη plia2e on the side of the front face B, to receive the -'périeur part of .the. door 14 which is blocked by le'môme system /> 4 · "*" "*" "* - _;. · - · l_5 i ^ I. · '; This ensures sealing by preventing the escape of animals- ^ The [' cover 2 also ensures l sealing.

:; A preferred embodiment plans to equip windows I! ^! j j posterior 13 and anterior 14 of ventilation holes of different 5,! diameters according to the dimensions of the snails contained in the cells - * i j; j In an alternative embodiment, provision is made to avoid the escape of the young; ’· Animals, place a screen, like a mosquito net, to hide these a% '.

: · ,: holes.

*; i | The materials preferably used are plastic; j | ‘10! · Food-grade white-translucent color for all rooms, Γ i i 1 i! except for the cover and the containers which are made of a transparent material. This choice is motivated in order to let the light pass into the cells and also to see the egg-laying in the bays. In addition, we | j: know of wavelength radiation favorable to spermatogenesis i \ J. ·;; 15. ! in adults and growing in young snails. We get ii j! j I ΐ 1 these Pat effects a coloring in the mass.

I! } | ! ; i j A. as information, it can be reported that the wavelengths! I going from 4,500 to 4,900 A favor mating and those of \ -] '6,250 A accelerate the maturity of the gonads.

1 '! 20 ;; We have, elsewhere, noted the influence of the cell height; i - * j 1 i i j I i1 on the results obtained. Preferably, following exane tests! i; ...

; ! ; riiaentaux, we choose a cell height between 15 and 35 cm.

t I, | j! Likewise, preferably, one chooses b guardians of columns corresponding to those of a hoirne.

j "i: 25; The ba '! S contain a substrate. For the spawning tanks, the j; substrate is of a height corresponding to the length of the neck of the e-.cargot, 1 c eS (-_ ie between 3 and 5 cm. We can thus see the eggs which are at the bottom of the tank. favor their enumeration, the laying tanks are provided! dd with a glass 16, placed at a distance from the bottom of the tank.

/ i | The constitution of this substrate must make it possible to maintain j jj humidity there without there being free water. This is important for! avoid 1 egg burst by osmosis. A preferential co-composition is fine earth, for example loose earth, topsoil ie seedlings, river sand, potting soil and a moisture absorber, such as P vermiculite, perlite or peat, which can also be used alone . ‘

The. ·, Bins, preferably, have ventilation holes, for example at the. periphery of the bottom as shown in Figure '3 at 17. ·! / *; . Î In Period <2 * inei.ibat ion, a so-called mini cell is used. * · ŒZ1 of preferential composition '"following: 1/3 fine earth, 2/3 absorber, afi" j -; · to ensure the maintenance of humidity for three weeks, in which:; are laid the eggs, the second vacuum overturned and covering the first.

; | | A perfectly closed enclosure is thus obtained, favorable for incubation.

:! *; 5d | Such a mini cell is represented in FIG. 3 on stage 3. Another i; *! ‘~ I 'j! substrate composition is peat only.

i | } Preferably, a thin layer of soil covers the eggs in; | I this cell, at most 1 cm. j * s. »'1 1; A supply device has been provided, preferably at the center. I * ^ ^ · ·! 10; ! tre of the upper tank, consisting of a tube 18 extended by a cone 19 j j | I ending on a .20 plate, .The minimum displacement is thus requested: *

: {i to newborns who can get moisture and food without spending

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•. : use too much energy. Maximum weight gain is thus favored, in one! i! : | cell ensuring reduced ootimal volume for this step,! ; ! j * j f 15; An advantage of such a device is that it does not require a mat; } {riel specific to each step of the process. The same bins in the same i i! ; ,. - _ "!‘ 1 ’| cells are used for all ages. I j; The invention also relates to a particular method of breeding snails, preferably using the aforementioned material.

î20 · We know that the natural reproduction cycle of the escarvot includes: j the following four stages: hibernation from October to January, mating and laying in spring, slow life in summer and laying and delivery; plement in autumn.

The present process erases the hibernation phase by playing on the parametric parameters essential for the development of the snail which are: the ter. peratura ί and humidity. Preferably, this process was tested on the τ ’Petit-Gris from Algeria, helix Aspersa, Lucorum and Pomatia.

It has been observed that the determinants of such breeding are in particular: the densities of mating, laying, infant growth, juvenile, 30. nile, mortality, height of a cell. These motivated the choice • 4 of the elements as described above, as well as the characteristics of the present process. In FIG. 3 have been represented, in a fictitious manner, in the same column, the different stages - of the breeding process. In fact, since the conditions are not necessarily the same, in particular for laying and incubation, it will be preferable to place the incubation cells in a column other than that in which laying and mating take place, for example, If the incubation takes place in the same column as the laying, it will suffice to varyx so that with 15 <Θ <18 ° C, xB = 18.21.

/ In 1, in the tanks containing the substrate as described above ------ f-! between 15 and 18 ° C. We keep it inside the columns and we ..

! - cools it outside of - 2 ° C by aeration for = 2 min. We then obtain a condensation on the cell walls, L’escargot -ira drink it. He will thus have the minimum distance to go to find the ear 5 'that he needs. At the same time, the coupling occurs on the runoff surfaces, partly "wet" ·, under the same operating conditions and in the same cell 1. These reductions in outside temperature of I, - 2 ° C compared to the temperature interior of the cells are determined experimentally when the need arises to cause humidity 10 on the cell walls, |;;; * I;; In 2, the eggs are selected and distributed periodically. (approximately every 15 days) For this, they are counted in the tanks located at I thanks to the transparent bottom of these tanks and possibly to the ice creams 16.

'·. Statistically, there are 100 to 200 eggs on average per lay.

15: We preferentially choose to take 10 to 12 eggs per incubation tank. The minicells and the substrate of preferential composition are used as described above and the said spawns are distributed there, keeping the eggs apart from one another, to prevent them from being eaten together.

20, The eggs are covered with a small layer of soil. Newborns must have the minimum path to cross 1 cm).

In 3, the minicell is formed. One maintains there at 0 ° C for: j x days, x and Θ being the variables determined by the relation χ.θ = 21.18.

I i *! ! : At the end of the incubation, there is the infantile period which lasts for two to four weeks after hatching. It takes place in the mini-cell mene with the feeding means described above, at a temperature between 15 ° and 18 ° C.

; i- Food is supplied by the device 18, 19, 20 as described above. The distribution is progressive, is located in: | ". .

i iUri Central point requesting the minimum expenditure of energy for newborns.

; ! ; Furthermore, the holes 17 at the periphery provide the necessary ventilation! ? i: I and the condensation which occurs on the walls inside the mini-jjcell provides sufficient humidity for the enclosed population. It is J | I recorded an identical weight gain in newborns at the end of this 35 day j. The advantage of a limited volume is in particular to minimize the] j | ? j jexpend energy for food.

* ί dd At the end of this infant growth phase, we remove the ji jsupërieur tray serving as a cover in the minicell and place it next to:! the first tray, under the same support, as shown in 4. '- 8-- move animals.

It’s the juvenile growth phase that begins. The food is placed on the support plate between the two tanks at 21, for example, preferably every two or three days, the temperature being maintained inside the cell between 15 and 18 ° C.

Of course, without departing from the scope of the invention, various modifications by equivalent means can be made by a person skilled in the art to the means and methods which have just been described only by way of non-illustrative example. limiting.

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Claims (6)

2. Device according to claim I, characterized in that l ^ ditj surfacej! jI of flow of adjoining cells are intersecting slopes, of J j J ^! j such that the discharge bungs from said surfaces are two; ί · · 510ï j in two vertically aligned. 3. Device according to any one of claims 1 to 2, characterized: in that lesdrts tanks intended for the laying of snails contain j: j 'a substrate whose approximate height is between 3 and 5 cm- • j î ^ ^ * - * -—— -, J: 1 * - 1 L 1 rL · - -I- -r- ~ - \ · - · JJJ, y! * i .... I ^ t. ... J,, | fc n1 T _ - _ - ^ [• ^ _ Device according to any one of Claims 1 to 3, characterized:. in that lesdrts bacs deny a substrate composed of fine earth preferentially taken from the group of the following products: earth me ible,: j. seedling topsoil, river sand, potting soil and an adsorber:; ! i> j 20; <... humidity, preferably taken from the group of the following products:! perlite, vermiculite, peat. j! ! 5 - Device according to any one of claims I to 4. characterizes 1 j i î '. , t *! i in that lesdrts bins are provided with a glass dDosé to a era dÎ5 ~! ; * 1. I i tance of their bottom to allow to reveal and count the bridges, s · •: · - r i 25: contained in said substrate. . Yes ; 6- Device according to any one of claims 115, characterized,! ._spnt in a transparent material and; . that said tanks / have ventilation holes, I 1 J * j; î 7 - Device according to any one of claims I to g, characterized \ I i 1. in that said tanks are slidably mounted on horizontal spacers! t 30. j zontales. ! i 8- Device according to any one of claims 1 to 7, characterized • in that each of said cells comprises at least one vertical door locked in a sealed manner in horizontal grooves. "9” Device according to any one of claims 1 to 8, characterized in that it comprises at least one incubation cell constituted by a tank containing a substrate in which spawns are distributed, extracted from a spawning tank, and by an empty container, overturned, covering the first L lO.i * * __ ______ __ ___ ____________ ____ ________ _ _ ______ __________________ _____ _ | jO “Device according to claim 9, characterized in that said m II incubation cell contains a substrate whose approximate proportions of fine earth and absorber are respectively 1/3 and 2/3. 11 I b.il - Device according to any one of claims 10, characterized ‘::‘ I 5, in that a layer of soil of at most 1 cm covers said eggs. •: 12 “Device according to any one of claims ^ toll, or said’ ’-! ; i incubation cell is used for. infant growth of newborns! j \ ‘characterized in that said empty container is crossed at its center by a:,: 'tube containing a food powder. * '· * · 10 · '13 - Device according to any one of the claims to characterized. :; in that the upper part of said column is made of a material i i; ί I: '· transparent and that the other faces are made of a translucent material. i • ‘I; 1 - Ρί · ΕΓ = · = ί-ί · - 1 * g -:> Vc-rcv-tv.-M cnf ic: .r î-à-4 ^ ær- ·: t * r i * 1: r; i in pppjLq.-la-taai-.oa? I one; -gel! u1 co ^ rlae. cnUc 13 eL ~ irx ck:; I. Application of the device! I 15 ’’ ^ --- ”- ô- le d” rp ~ according to any one | 1 ·,. in the breeding of snails: I î of claims 1 to 13 / characterized in that one maintains, during J 1. stage d1 mating eir.ent-laying, a temperature, inside said | cells, between 15 and 15 ° C. - I \ l5 “Applicadon3ei0n the claim characterized in that one cools '20 ls outside temperature -uxdi.tes mating-clutching cells, of' jii - 2 C compared to the temperature inteneuvedesd 1 your cells and that i I i; ...! * ί if one thus obtains a condensation on the walls of said cells. ; l I | 16 Anplicatlon ^ ge | oa x * any of the revs. ndicatior.s 14, 15, d y \! Device according to any one of Claims 9 to 12, I * jj | 25 characterized in that the eggs I are periodically sampled and distributed in incubation tanks and that one is maintained therein. “Î J, r temperature 6 for x days, such that χ.θ = 18.21,; ^ 17A_> pl_catic. ^ E- ^ we ja claim 16, characterized in that we cover * 1 i; i said spawns with a layer of soil of not more than 1 cm, I · '. 30 . ÎS ^ - 'P-Icat: 3'ÎJ15èelon one quolci nque of claims 16 ·, 17 ,, characterized î h 1 in c.e that the period of egg laying is about 15 days 19 App because rüseloïi any one of the re ve ad îations 1- * to 18, characterized I in that it comprises, in addition, a stage of infantile growth during f. . _ _ I. approximately two to four weeks, after hatching, where you can control. p5 holds the newborn babies in said incubation cells traversed by a preferentially central feeding tube, * 30 AnplicatiqrD ... 1 / ^ io ï iSelon 1 any one of claims * "* to.1 “, Characterized J er * that it includes, in addition, a stage of juvenile growth where one j. I ote the empty tank sup-r <e.ur constituting said incubation cell and that ·! / / λ <· "-" .- <· L1> i "" being maintained between 15 and 18 ° C inside the cell. ' Ί 21. Application of the method according to any one of claims ^ I to 20, characterized in that one raised from the Petits-Gris from Algeria, Helix; . Aspersa, Helix Lucorum, Helix Pomat ia- I; " ' : § this ! ! - i! i; i. ; | i; i:! J; ; \ 1; : *. i • i -! I> i i! i t i (. T! [; 1!, 1 ’, I