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  • 1995-1999  (3)
  • Freshwater prawn (Macrobrachium rosenbergii)  (2)
  • Light limitation  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Evaluation of vitamin C-enriched Artemia nauplii for larvae of the giant freshwater prawn (1995)
    Springer
    Aquaculture international 3 (1995), S. 355-363 
    Details
    ISSN: 1573-143X
    Keywords: Freshwater prawn (Macrobrachium rosenbergii) ; Ascorbic acid ; Vitamin C ; Larviculture ; Artemia ; Enrichment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The effect of high levels of ascorbic acid (AA) delivered through enriched live food has been verified through the successful culture of larval giant freshwater prawn, Macrobrachium rosenbergii. Two successive feeding trials were set up using a control (550 Μg AA g−1 DW) and two different AA-enrichment levels in Artemia (1300 and 2750 Μg AA g−1 DW). Under standard culture conditions, no differences in growth nor survival could be observed demonstrating that the nutritional requirements are below 550 Μg AA g−1 DW, which is the normal level occurring in freshly-hatched Artemia. However, a significantly positive effect could be demonstrated on the physiological condition of the postlarvae, measured by means of a salinity stress test, when vitamin C-boosted live food was administered. Since the AA levels in the predator larvae are linked with the enrichment levels in the live prey, it may be assumed that a positive influence on stress resistance was caused by feeding vitamin C-enriched Artemia. It is expected that under suboptimal conditions, supplementation of high vitamin C levels might also enhance production characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121623
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of feeding (ω-3) HUFA-enriched Artemia during a progressively increasing period on the larviculture of freshwater prawns (1995)
    Springer
    Aquaculture international 3 (1995), S. 236-242 
    Details
    ISSN: 1573-143X
    Keywords: Freshwater prawn (Macrobrachium rosenbergii) ; Larviculture ; Lipid enrichment ; Growth and survival rate ; Stress resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Larvae of the freshwater prawn (Macrobrachium rosenbergii) were reared to post-larvae in a closed recirculation system. Six treatments were designed where freshly-hatched Artemia nauplii were first given to the larvae for 3, 7, 11, 15, 17 and 25 days according to the treatment. After that (ω-3) HUFA-enriched Artemia were given until the 28th day at which time the test was terminated and evaluated. The requirement for (ω-3) Highly Unsaturated Fatty Acids (HUFA) for the larval stages of M. rosenbergii was confirmed by this experiment. Moreover, the longer the period of feeding on (ω-3) HUFA-enriched Artemia nauplii, the better the results in terms of growth, metamorphosis rate, survival and stress resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00118105
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of different light regimes on the docosahexaenoic acid (DHA) content of Isochrysis aff. galbana (clone T-ISO) (1997)
    Springer
    Aquaculture international 5 (1997), S. 489-507 
    Details
    ISSN: 1573-143X
    Keywords: Clonal variation ; Docosahexaenoic acid (DHA) ; Factorial optimization ; Light limitation ; Photoperiod ; T-ISO
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The culture of Isochrysis aff. galbana Green (T-ISO) in hatcheries is promoted for its high docosahexaenoic acid (DHA) content which favours the successful rearing of aquatic larvae. In this paper we identified the need for well-defined culture conditions of microalgae if sufficient DHA content is the final goal. Using photoperiods of 24:0 h, 12:12 h, and 16:8 h L/D combined with photon flux densities (PFDs) of 110, 220, and 460μE m-2 s-1, batch cultures of T-ISO were sampled for DHA content in the exponential as well as the post-exponential (light limited) growth phase. The various light regimes resulted in differences of DHA content of T-ISO revealing influences and strong interactions among the three variables studied. For fast and economic production of T-ISO cells rich in DHA it is recommended to harvest batch cultures at the end of the exponential phase using high photon flux densities (PFDs) under 12:12 h L/D cycles. The same regime or lower PFD under 24:0 h L/D seem to be sufficient for a continuous culture optimization scheme. In any case a strict following of culture protocols is very important since there is evidence for coexistence of different clones within the parental cultures leading to different results depending on which one prevails.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018349131522
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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