Nutritional effect of freshwater Chlorella on growth of the rotiferBrachionus plicatilis

✍ Scribed by K. Hirayama; I. Maruyama; T. Maeda

• Publisher: Springer
• Year: 1989
• Tongue: English
• Weight: 240 KB
• Volume: 186-187
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00048894

✦ Synopsis

Mass production of Brachionus plicatilis is usually accomplished by feeding so-called marine Chlorella (Nannochloropsis oculata) to the rotifers in marine fish hatcheries. If the marine Chlorella are in short supply, baker's yeast is usually used as a supplementary food. Recently, a condensed suspension of freshwater Chlorella (Chlorella vulgaris, k-22) was commercially developed as another supplementary food. We have evaluated the dietary value of this freshwater Chlorella for growth of the rotifer by means of individual and batch cultures. Rotifers cultured with the freshwater Chlorella suspension under almost bacteria-free conditions, showed very suppressed growth. However if the Chlorella was supplemented with vitamin B12 by adding the vitamin solution into the suspension or by culturing the Chlorella in a medium containing vitamin B12, the nutritional value of freshwater Chlorella was greatly improved and almost at the same level as that of marine Chlorella. a supplementary food if vitamin B12 is supplied.