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The macronutrient composition of natural food organisms mass cultured as larval feed for fish and prawns

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Date
1990
Author
Millamena, Oseni M.
Peñaflorida, Veronica D.
Subosa, Precilla F.
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Abstract
The macronutrient composition of natural food organisms that are mass cultured as feed for the larval stages of fish and prawns in the SEAFDEC Aquaculture Department was determined by chemical analysis. The food organisms included five species of marine phytoplanktons (algae): Chaetoceros calcitrans, Skeletonema costatum, Tetraselmis chui, Chlorella vulgaris and Isochrysis galbana, and two zooplanktons: Artemia sp. nauplii (San Francisco Bay strain) and Brachionus plicatilis. The algal species were grown in batches on Guillard and Ryther media and harvested during the exponential phase of growth using a procedure which preserved cellular integrity and prevented cell lysis. The zooplankton were cultured using standard techniques adopted at the SEAFDEC Larval Food Laboratory. Each species was analyzed for proximate composition (protein, fat, fiber and ash) and for mineral content (calcium and phosphorous). Nitrogen-free extract (NFE) was determined by difference. For the five algal species, the protein, fat and NFE contents varied from 22% to 48%, 2% to 16% and 14% to 24%, respectively. The zooplanktons had higher protein and fat contents than any of the phytoplankton species except I. galbana which had the highest fat content. On the other hand, the phytoplanktons, particularly the diatoms which have a siliceous cell wall, contained significantly higher quantities of inorganic matter (ash). C. vulgaris had the highest fiber content which may be attributed to its cellulosic cell wall.
URI
http://hdl.handle.net/10862/1318
Suggested Citation
Millamena, O. M., Peñaflorida, V. D., & Subosa, P. F. (1990). The macronutrient composition of natural food organisms mass cultured as larval feed for fish and prawns. The Israeli Journal of Aquaculture-Bamidgeh, 42(3), 77-83. http://hdl.handle.net/10862/1318
Subject
Algae ASFA; algal culture ASFA; aquaculture ASFA; biochemical composition ASFA; diet ASFA; fish culture ASFA; fish larvae ASFA; cultured organisms; mass culture; nauplii ASFA; nutritive value ASFA; phytoplankton ASFA; phytoplankton culture; prawn culture ASFA; zooplankton culture ASFA
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  • AQD Journal Articles [1196]

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