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EP0104702A1
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EP
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Method and device for producing, packing, and using artemia offspring
Assignee: Oleon NV
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Filing: 1983-09-15
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Granted: —
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Expires: 2003-09-15
Abstract
Abstract Artemia (14,90) are kept under such conditions as high density in a flowing aqua-culture (2) that either nauplii (90) or cysts (14) are deposited as offspring (14,90). A treatment inducing cyclic cysts production consists of a cyclic reduction of the oxygen concentration of the flowing aqua-culture (2). A device (1,44) for depositing only one selected type of offspring (14,90) comprises for the production of cysts (14) inducing means (12,53,64,67) for the cyclic reduction of the oxygen concentration. A packing (67) of such offspring (14,90) is provided with a label (68) indicating a specification predetermined by the conditions the flowing aqua-culture (2) had been operated at. Methods for feeding Artemia (14,90) are characterized by the use of agricultural derivatives (7) and/or chicken manure (7). A method for preparing food (14,90) is characterized by the use of nauplii (90) and/or cysts (14) produced in the flowing aqua-culture (2) and/or by the use of particles coated with a food additive.
Inventors
- 👤 Patrick P. Sorgeloos
- 👤 Danny H. Versichele
- 👤 Philippe P.J.M. Leger
- 👤 Patrick A. Lavens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 16:21
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/50; A01K61/59; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
76 words
A method of producing Artemia offspring (14,90) in which the Artemia (49) depositing offspring (14, 90) are kept in an aqua-culture (2) and the deposited offspring (14, 90) is harvested, characterized in that the Artemia (49) in high density are kept in a flowing aqua-culture (2) under such selected conditions that the -Artemia (49) deposit only one selected type (14, 90) of the two potential types of offspring (14, 90) i.e. nauplii (90) and cysts (14).
Claim 2
Independent Claim
76 words
A method of producing Artemia offspring (14,90) in which the Artemia (49) depositing offspring (14, 90) are kept in an aqua-culture (2) and the deposited offspring (14, 90) is harvested, characterized in that the Artemia (49) in high density are kept in a flowing aqua-culture (2) under such selected conditions that the -Artemia (49) deposit only one selected type (14, 90) of the two potential types of offspring (14, 90) i.e. nauplii (90) and cysts (14).
Claim 3
Dependent Claim
36 words
A method as claimed in Claim 1, characterized in that the Artemia (49) are kept in a density of at least 1000, preferably at least 10.000 and more, preferably at least 15.000 animals (49) per litre.
Claim 4
Dependent Claim
29 words
A method as claimed in Claim 1 or 2, characterized in that the deposited offspring (14, 90) is harvested from a water stream (46) leaving the flowing aqua-culture (2).
Claim 5
Independent Claim
47 words
A method as claimed in one of the preceding Claims, characterized in that through a wedge strainer (26) arranged in the flowing aqua-culture (2) and retaining the Artemia (49) excreta (59) and water (46) containing produced offspring (14, 90) are conducted out of the flowing aqua-culture (2).
Claim 6
Dependent Claim
47 words
A method as claimed in Claim 4, characterized in that after harvesting the produced offspring (14, 90) at least a portion (46) of the water (46) conducted away as a carrier of offspring (14, 90) and excreta (59) is purified and recycled as a recycle stream (68).
Claim 7
Independent Claim
31 words
A method as claimed in one of the preceding Claims, characterized in that for producing Artemia cysts (14) the Artemia (49) are subjected to a treatment inducing a cyclic cyst production.
Claim 8
Dependent Claim
31 words
A method as claimed in Claim 6, characterized in that the treatment inducing the cyclic cyst production consists of a cyclic reduction of the oxygen concentration of the flowing aqua-culture (2).
Claim 9
Dependent Claim
43 words
A method as claimed in Claim 6 or 7, characterized in that the flowing aqua-culture (2) is flushed with water (25), the salinity of which lies between 15 and 90 ppt, preferably 35 and 50 ppt, and more preferably with sea water (25).
Claim 10
Independent Claim
72 words
A method as claimed in anyone of Claims 6 to 8, characterized in that the oxygen concentration in the flowing aqua-culture (2) is cyclically reduced in a period from 1 to 6 hours for at the most 30 minutes, a minimum oxygen concentration being attained within 15 minutes, preferably within 6 minutes, which is lower than or equal to 10 % of the saturation concentration of oxygen in the flowing aqua-culture (2).
Claim 11
Independent Claim
29 words
A method as claimed in anyone of Claims 6 to 9, characterized in that the oxygen concentration is reduced by supplying nitrogen gas (64) to the flowing aqua-culture (2).
Claim 12
Independent Claim
117 words
A device (1, 44) for producing Artemia offspring (14, 90) in aqua-culture (2) comprising a water basin (5), food supplementing means (6), sieving means (8) for removing excreta and produced offspring (14, 90) from the aqua-culture (2) whilst retaining the Artemia (49) producing the offspring (14, 90), aerating means (13) and harvesting means (11) characterized in that the device (1, 44) is provided with means (12, 53, 64, 67) for depositing only one selected type (14, 90) of the two potential types of offspring (14, 90), i.e. nauplii (90) and cysts (14) and in that the water basin (5) is provided with a water inlet (7) and a water outlet (4) for obtaining a flowing aqua-culture (2).
Claim 13
Independent Claim
117 words
A device (1, 44) for producing Artemia offspring (14, 90) in aqua-culture (2) comprising a water basin (5), food supplementing means (6), sieving means (8) for removing excreta and produced offspring (14, 90) from the aqua-culture (2) whilst retaining the Artemia (49) producing the offspring (14, 90), aerating means (13) and harvesting means (11) characterized in that the device (1, 44) is provided with means (12, 53, 64, 67) for depositing only one selected type (14, 90) of the two potential types of offspring (14, 90), i.e. nauplii (90) and cysts (14) and in that the water basin (5) is provided with a water inlet (7) and a water outlet (4) for obtaining a flowing aqua-culture (2).
Claim 14
Dependent Claim
38 words
A device (44) as claimed in Claim 11, characterized in that the depositing means (12, 53, 64, 67) comprise inducing means (12, 53, 64, 67) for the cyclic reduction of the oxygen concentration in the flowing aqua-culture (2).
Claim 15
Dependent Claim
23 words
A device (1, 44) as claimed in Claim 11 or 12, characterized in that the harvesting means (11) comprise a wedge strainer (39).
Claim 16
Dependent Claim
49 words
A packing (67) of Artemia offspring (14, 90) as claimed in anyone of Claims 1 to 5, i.e. Artemia nauplii (90) or cysts (14) produced as claimed in anyone of Claims 1 to 10, and provided with a label (68) indicating a specification of the packed offspring (14, 90).
Claim 17
Independent Claim
41 words
A method of feeding Artemia (49) in which the Artemia (49) are fed on a micronized product (7) characterized in that the Artemia (49) are fed on a carbohydrate- and/or protein-lean maize derivative (7), a soya derivative and/or a manioc derivative.
Claim 18
Independent Claim
41 words
A method of feeding Artemia (49) in which the Artemia (49) are fed on a micronized product (7) characterized in that the Artemia (49) are fed on a carbohydrate- and/or protein-lean maize derivative (7), a soya derivative and/or a manioc derivative.
Claim 19
Independent Claim
30 words
A method of feeding Artemia (49) in which Artemia (49) are fed on a micronized product (7) characterized in that the Artemia (49) are fed on micronized chicken manure (7).
Claim 20
Independent Claim
30 words
A method of feeding Artemia (49) in which Artemia (49) are fed on a micronized product (7) characterized in that the Artemia (49) are fed on micronized chicken manure (7).
Claim 21
Independent Claim
70 words
A method of preparing food (14, 90) for larvae of fish or crustacea, in which nauplii (90) released by the development of Artemia cysts (14) or deposited by ovoviviparous reproduction are fed to the larvae characterized in that Artemia cysts (14) produced as claimed in anyone of Claims 1 to 10 in aqua-culture (2) or Artemia nauplii (90) produced as claimed in anyone of Claims 1 to 5 are used.
Claim 22
Dependent Claim
41 words
A method as claimed in Claim 17, characterized in that at least one food additive of a type such is added to the aqua-culture (2) that the food composition of the nauplii (90) corresponds to the food need of the larvae.
Claim 23
Independent Claim
71 words
A method of preparing food (14, 90) for larvae of fish or crustacea in which the food composition of nauplii (90) obtained by Artemia (49) and serving as a food (14, 90) for larvae of fish or crustacea is adjusted to the food need of the larvae characterized in that at least one food additive is added to the Artemia (49) in the form of particles coated with the food additive.
Claim 24
Independent Claim
71 words
A method of preparing food (14, 90) for larvae of fish or crustacea in which the food composition of nauplii (90) obtained by Artemia (49) and serving as a food (14, 90) for larvae of fish or crustacea is adjusted to the food need of the larvae characterized in that at least one food additive is added to the Artemia (49) in the form of particles coated with the food additive.
Claim 25
Dependent Claim
17 words
A method as claimed in Claim 19, characterized in that the particles are coated with fish oil.
Claim 26
Dependent Claim
17 words
A method as claimed in Claim 20, characterized in that the particles are coated with codliver oil.
Claim 27
Independent Claim
27 words
A method as claimed in anyone of Claims 19 to 21, characterized in that the particles are formed by food particles intended to feed the Artemia (49).
Claim 28
Independent Claim
19 words
A method as claimed in anyone of Claims 19 to 21, characterized in that the particles are starch grains.
Claim 29
Independent Claim
19 words
A method as claimed in anyone of Claims 19 to 23, characterized in that the food additive contains carotenoids.
Claim 30
Dependent Claim
20 words
A food containing particles coated with at least one food additive as claimed in anyone of Claims 29 to 24.
Claim 31
Independent Claim
84 words
A method of preparing an animal food (49) characterized in that nauplii (90) produced by development of cysts (14) obtained as claimed in anyone of Claims 1 to 10 or nauplii (90) deposited by ovoviviparous reproduction as claimed in anyone of Claims 1 to 5 in an aqua-culture (2) comprising at least one wedge strainer (26) intended to conduct away water (52) containing excreta (59), whilst retaining the nauplii (90) are cultivated to obtain Artemia (49 and the cultivated Artemia (49) are subsequently harvested.
Claim 32
Dependent Claim
20 words
A method as claimed in Claim 26, characterized in that the nauplii (90) are grown in a flowing aqua-culture (2).
References Cited (Backward Citations)
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