US4593647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device of producing artemia offspring
Assignee: Oleon NV
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Filing: 1983-09-16
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Granted: 1986-06-10
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Expires: 2003-09-16
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
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/50; A01K61/59; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
50 words
A method of producing Artemia offspring in which the Artemia depositing offspring are kept in an aqua-culture and the deposited offspring harvested, comprising providing said Artemia in a high density in a flowing aqua-culture under such selected conditions that the Artemia deposit only one selected type i.e. nauplii and cysts.
Claim 2
Independent Claim
50 words
A method of producing Artemia offspring in which the Artemia depositing offspring are kept in an aqua-culture and the deposited offspring harvested, comprising providing said Artemia in a high density in a flowing aqua-culture under such selected conditions that the Artemia deposit only one selected type i.e. nauplii and cysts.
Claim 3
Dependent Claim
30 words
The method of claim 1, wherein the Artemia are kept in a density of at least 1000, preferably at least 10,000 and more, preferably at least 15,000 animals per liter.
Claim 4
Dependent Claim
19 words
The method of claim 1, wherein the deposited offspring is harvested from a water stream leaving the flowing aqua-culture.
Claim 5
Dependent Claim
24 words
A packing of Artemia off-spring produced according to the matter of claim 1, provided with a label indicating a specification of the packed offspring.
Claim 6
Dependent Claim
43 words
The method of claim 1, wherein water containing said produced offspring is conducted out of said flowing aqua-culture through a wedge strainer arranged in said aqua-culture retaining said Artemia and excreta and water containing produced offspring are conducted out of the flowing aqua-culture.
Claim 7
Dependent Claim
36 words
The method of claim 5, wherein after harvesting said produced offspring at least a portion of said water conducted away as a carrier of said offspring and excreta is purified and recycled as a recycle stream.
Claim 8
Dependent Claim
19 words
The method of claim 1, wherein said Artemia are subjected to a treatment inducsing a cyclic Artemia cyst production.
Claim 9
Dependent Claim
25 words
The method of claim 7, wherein said treatment inducing the cyclic cyst production consists of a cyclic reduction of oxygen concentration of said flowing aqua-culture.
Claim 10
Dependent Claim
34 words
The method of claim 7, wherein the flowing aqua-culture is flushed with water, the salinity of which lies between 15 and 90 ppt, preferably 35 and 50 ppt, and more preferably with sea water.
Claim 11
Dependent Claim
60 words
The method of claim 7, wherein oxygen concentration in the flowing aqua-culture 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.
Claim 12
Dependent Claim
18 words
The method of claim 7, wherein oxygen concentration is reduced by supplying nitrogen gas to said flowing aqua-culture.
Claim 13
Dependent Claim
49 words
A method of preparing food for larvae of fish or crustacea, whereby nauplii released by the development of Artemia cysts or deposited by ovoviviparous reproduction are fed to the larvae, comprising the production of Artemia cysts or Artemia nauplii in an aqua-culture according to the method of claim 1.
Claim 14
Dependent Claim
35 words
The method of claim 12, wherein at least one food additive of a type is added to the aqua-culture such that the food composition of the nauplii corresponds to the food need of the larvae.
Claim 15
Dependent Claim
62 words
A method of preparing an animal food comprising nauplii produced by development of cysts or nauplii deposited by ovoviviparous reproduction as set forth in claim 1 in an aqua-culture medium wherein at least one wedge strainer intended to conduct away water containing excreta, is used while retaining the nauplii which are cultivated to obtain Artemia and the cultivated Artemia are subsequently harvested.
Claim 16
Dependent Claim
13 words
A method claim 14, wherein the nauplii are grown in a flowing aqua-culture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |