Recent progress in the use of processed microalgae in aquaculture

Sommer, Ted; Potts, W. T. W.; Morrissy, N.M.

doi:10.1007/bf00040268

Cited by 21 publications

(8 citation statements)

References 31 publications

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“…In another line of development, microalgae have also been exploited in the aquaculture industry as high-value feeds (Sommer, 1990). This is due to the high nutritional qualities of these microalgae which contain essential nutrients (especially polyunsaturated fatty acids).…”

Section: Introductionmentioning

confidence: 99%

Studies on the production of useful chemicals, especially fatty acids in the marine diatom Nitzschia conspicua Grunow

1994

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A local marine diatom, Nitzschia conspicua Grunow, was cultured in enriched synthetic seawater using flasks (agitated by magnetic stirring) and a 1.2 1 fermenter. Lipids, fatty acids, proteins, carbohydrates and ash of the flask cultures were determined at various stages of growth (day 3, 5, 7, 10, 13, 15 and 17). The fermenter culture was harvested during the stationary phase for similar chemical analyses. N. conspicua attained a higher biomass concentration during the stationary phase when cultured in the fermenter (188 mg dry weight 1 -) than in flasks (140-151 mg dry weight 1-'). However, both systems showed similar specific growth rates based on chlorophyll-a concentration. Appreciable amounts of the essential fatty acids 20:4 (0.6-4.7% total fatty acids) and 20:5 (1.9-4.7% total fatty acids) are present in this diatom. Maximal amounts of these fatty acids were produced after 7 days' growth (i.e. 2 days after the end of the exponential phase). Lipids, fatty acids, proteins, carbohydrates and ash varied with culture age in N. conspicua.

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Section: Introductionmentioning

confidence: 99%

Studies on the production of useful chemicals, especially fatty acids in the marine diatom Nitzschia conspicua Grunow

1994

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“…To increase the efficiency of using microalgae biomass, especially concentrates, the appropriate shape of the culture tanks should be considered (Sommer et al, 1990). Also to be considered is the application of aerators to create a circulation regime that maximizes cell resuspension and avoids the accumulation of non-ingested feed at the bottom.…”

Section: Feed Dosag E a S A S Tr Ategy For B E T Ter Microalg Ae Cons...mentioning

confidence: 99%

Concentrated microalgal biomass as a substitute for fresh microalgae produced on site at hatcheries

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Lopes

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et al. 2022

Aquaculture Research

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Microalgae are essential for most aquaculture hatcheries as first‐feed for larvae. Even so, high labour costs and risk of production crashes have encouraged the search for fresh culture substitutes, such as microalgae concentrates. Despite their importance as a commodity for the aquaculture sector, the concentrates are not available worldwide, and consolidated knowledge is scarce. Therefore, this bibliographic study aimed review microalgae products available for hatcheries, identifying research gaps and suggesting opportunities for development. In most studies, microalgae cultures were harvested by centrifugation, and biomass was stored chilled, frozen or dried (heat‐, spray‐ or freeze‐dried). The shelf life of microalgae products was dependent on the method of storage and microalgae species since robust species maintained their nutritional value for a longer period compared to more fragile ones, which would be sensitive to harvesting and storage. Thus, the use of concentrates in some feeding trials resulted in poor zootechnical performance. These results have four possible explanations: cell ingestion difficulty, low feed digestibility by phytoplanktivores animals, biomass degradation or inadequate choice of microalgae species. However, these limitations can be overcome by fractionating feed portions and adapting the culture tanks and aeration systems, but mainly by determining the ideal method for storing biomass and shelf life for each microalgae species. Taken together, our findings show that the application of microalgae concentrates can enhance the efficiency and profitability of aquaculture hatcheries.

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“…In recent years, culturing of the cyanobacterium Spirulina platensis and of various algae as food supplements and natural, protein-rich food for shellfish, fin fish, humans, and certain domestic animals has soared (31, 32, 76, 91, 134, 179,204,220,228,229,254,259). A developing problem is the contamination of cultures by Ephydridae.…”

Section: Crop Pestsmentioning

confidence: 99%

Biology of Shore Flies

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1995

Annu. Rev. Entomol.

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Recent progress in the use of processed microalgae in aquaculture

Cited by 21 publications

References 31 publications

Studies on the production of useful chemicals, especially fatty acids in the marine diatom Nitzschia conspicua Grunow

Studies on the production of useful chemicals, especially fatty acids in the marine diatom Nitzschia conspicua Grunow

Concentrated microalgal biomass as a substitute for fresh microalgae produced on site at hatcheries

Biology of Shore Flies

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