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  • 1
    Electronic Resource
    Electronic Resource
    Solid-Phase Extraction of Ascorbic Acid 2-Sulfate from Cysts of the Brine Shrimp Artemia franciscana (1994)
    s.l. : American Chemical Society
    Analytical chemistry 66 (1994), S. 1330-1333 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00080a019
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  • 2
    Electronic Resource
    Electronic Resource
    State of the Art of Asian Seabass Lates calcarifer Larviculture (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 23 (1992), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Innovative techniques opened new perspectives in the larviculture of the Asian seabass in the 1980s. Induced spawning maximized egg production while sperm preservation reduced the problem of male brood-stock supply. Studies of biometric characteristics of the fish larvae resulted in improved feeding strategies with live food. This in turn permitted a more rational use of expensive Artemia nauplii. Nutritional enhancement of the highly unsaturated fatty acid (HUFA) composition of the live food resulted in significant improvement of survival and physiological condition of the larvae at metamorphosis. A salinity stress test enabled the evaluation of the larvae's physiological status and estimation of their HUFA-requirements during the hatchery and pre-nursery phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.1992.tb00795.x
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  • 3
    Electronic Resource
    Electronic Resource
    Reproductive Performance of Macrobrachium rosenbergii Females in Captivity (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 32 (2001), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract.— The breeding frequency, fecundity, egg hatchability, larval output and viability of pond-reared, mature Macrobrachium rosenbergii females were individually followed up during 180 d. Sexually mature prawns were maintained under controlled laboratory conditions (28.7 C and 12-h light/d) in a 190-L freshwater recirculation system and fed a formulated diet. Ovarian development, moulting and spawning events were checked daily. At least six consecutive moults were recorded for each of the 18 females. The duration of the intermoult period averaged 27.5 d and was not affected by ovarian development or spawning, but intermoult periods followed by spawning had significantly lower growth rates. From a total of 126 moulting events recorded, egg laying successfully followed 76 (60.3%) of them. The number of eggs per spawn (NES) varied from 26,587 to 74,775 for females weighing 20.0 to 55.8 g. The relationship between NES and female size (W; in g) was found to be NES = 484 + 1454W (r2= 0.74). Results suggest that the number of viable larvae produced per egg clutch may be increased by in vitro incubation, as the losses of eggs, which usually occur under in vivo incubation, are prevented. The present study illustrates that under adequate and stable rearing conditions, M. rosenbergii females are able to spawn up to five times during 180 d, in comparison to three to five times per year as reported for wild prawn populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.2001.tb00922.x
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  • 4
    Electronic Resource
    Electronic Resource
    Baker's Yeast as a Potential Substitute for Live Algae in Aquaculture Diets: Artemia as a Case Study (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 21 (1990), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In this study baker's yeast was evaluated as a substitute for live Dunuliella tertiolecta algae in the culture of the brine shrimp Artemia. Consumption of fresh baker's yeast resulted in poor growth and survival of brine shrimp. However, the nutritional value of the yeast sigaificantly improved after complete removal of the yeast cell wall by enzymatic treatment. Baker's yeast was also made digestible for Artemia by simple chemical treatment which did not reduce rigidity of the yeast cell. The external mannoprotein layer of the yeast cell wall is probably the major barrier to digestion by Artemia. Chemically treated baker's yeast offers promising possibilities as a substitute for algal feeds in aquaculture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.1990.tb00947.x
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  • 5
    Electronic Resource
    Electronic Resource
    Maturation performance, offspring quality and lipidcomposition of Macrobrachium rosenbergii femalesfed increasing levels of dietary phospholipids (2000)
    Springer
    Aquaculture international 8 (2000), S. 41-58 
    Details
    ISSN: 1573-143X
    Keywords: body lipid composition ; egg and larval quality ; freshwater prawn (Macrobrachium rosenbergii) ; maturation ; phospholipids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effects of increasing levels of dietaryphospholipids (PL) on the reproductive performance,egg and larval quality, and lipid composition offemales of the freshwater prawn Macrobrachiumrosenbergii were investigated. Three isolipidic dietscontaining similar amounts of highly unsaturated fattyacids but varying levels of PL (0.8, 2.4 and 4.6%)were fed during 180 days to three groups of eightfemales originating from Thai ponds. No significantdifferences were observed for fecundity, egg size andhatchability, starved larvae size, and size, survivaland tolerance to stress of 8 day-old larvae.Similarly, no major differences in the lipidcomposition of the midgut gland, ovaries and muscletissue of females could be detected. Results indicatethe lack of need of dietary supplementation of PL forM. rosenbergii broodstock, as previouslyreported for earlier life stages. It is suggested thatthe basal level of 0.8% dietary PL was sufficient tomeet the dietary demands of the prawn broodstock. ThePL requirements of M. rosenbergii broodstock, ifany, may be satisfied in commercial feeds through theinclusion of ingredients containing some phospholipidsendogenously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009220932268
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  • 6
    Electronic Resource
    Electronic Resource
    Characterization of brine shrimp Artemia from Cam Ranh Bay in Central Vietnam (1988)
    Springer
    Hydrobiologia 157 (1988), S. 209-217 
    Details
    ISSN: 1573-5117
    Keywords: Artemia ; inoculation ; salt pond ; cyst quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Artemia cysts collected from inoculation experiments in Cam Ranh salterns are evaluated for their potential use in aquaculture. Cyst biometrics, hatching quality, naupliar fatty acid profile and naupliar growth were measured and compared to reference Artemia strains. Cyst characteristics reveal that the parthenogenetic strain (PR China) used in inoculations, was eliminated from the environment and that the remaining brine shrimp are likely to be composed of Macau and Great Salt Lake Artemia strains, and of their cross-breds. Differences in cyst diapause deactivation characteristics between Macau and Great Salt Lake Artemia may have resulted in the disappearance of Macau Artemia during the rainy season and the persistence of Great Salt Lake Artemia during the following dry season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00004198
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  • 7
    Electronic Resource
    Electronic Resource
    The use of manipulated baker's yeast as an algal substitute for the laboratory culture of Anostraca (1992)
    Springer
    Hydrobiologia 234 (1992), S. 25-32 
    Details
    ISSN: 1573-5117
    Keywords: algal substitute ; yeast ; Artemia ; Streptocephalus ; lipid requirements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The production of unicellular algae is laborious and is a major constraint for the culturing of aquatic filter-feeders. Because of their small particle size and their high protein content yeasts are considered as a promising substitute for micro-algae. Furthermore, recent work has shown that baker's yeast can be converted into a digestible diet for Artemia by chemical treatment. The present study documents the use at laboratory scale of this manipulated yeast as an algal substitute for the culture of two anostracan species. The experiments were conducted with the brine shrimp artemia franciscana and the fairy shrimp Streptocephalus proboscideus. A similar experimental set-up was used for both species. The algal diet, consisting of Dunaliella tertiolecta for A. franciscana and Selenastrum capricornutum for S. proboscideus, was substituted at various levels by two types of treated baker's yeast: a fresh form and a dried product which was rich in highly unsaturated fatty acids (HUFA). The chemically-treated yeast offers promising possibilities as an algal substitute for Artemia; i.e. replacing 75% of the algae by the dried yeast resulted in similar survival and even higher growth rates in comparison with the reference algal diet; for the treated fresh yeast similar results could be achieved by up to 95% substitution. For S. proboscideus, a substitution of 75% by either of the yeast products resulted in good survival, though growth did not exceed 80% of the observed growth in the algal control. A diet consisting solely of yeast resulted in poor survival for larvae of both species. Experiments were run to investigate whether this was due to a sub-optimal feeding regime, nutritional deficiencies, or deterioration of the water quality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010776
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