Effect of combination feeding of Nannochloropsis and freshwater Chlorella on the fatty acid composition of rotifer Brachionus plicatilis in a continuous culture

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概要

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• A continuous culture of rotifer was conducted to investigate the effect of combination feeding of both a high density of Nannochloropsis oculata (N) and condensed freshwater Chlorella (FC) on the fatty acid composition of L-type rotifer Brachionus plicatilis in a continuous culture system. The algal feeding of the rotifers was carried out in three successive steps: N-feeding → N+FC-feeding → FC-feeding. The culture was conducted at 24°C and 25-27 psu in a 2000 mL bottle with 50% of water exchanged daily. The combination N+FC-feeding was effective in increasing rotifer density. The rotifers fed on N+FC (N+FC-R) had more non-polar lipids than polar ones, similar to those on N (N-R), opposite to the rotifers fed on FC (FC-R). N+FC-R contained higher levels of 16:2, 18:2n-6 (linoleic acid [LA]) and 20:2n-6, but lower levels of 18:1, 20:4n-6 (arachidonic acid), 20:5n-3 (eicosapentaenoic acid [EPA]) and 22:5n-3 (docosapentaenoic acid [DPA]) compared with N-R. Whereas N+FC-R contained higher levels of 16:1n-7, EPA and DPA, but lower levels of 16:2 and LA compared with FC-R. N+FC-R had more DPA in polar lipids than in non-polar ones. The Σn-6/Σn-3 ratio in N+FC-R was 0.9-1.0, significantly different from those in N-R (0.4) and FC-R (6.6-8.4). Therefore, it is inferred that the fatty acid profile of the N+FC-R cultured in a continuous culture system was affected by both N and FC. Also, the combination N+FC-feeding may be effective in manipulating the Σn-6/Σn-3 ratio in continuously cultured rotifers. © 2008 Japanese Society of Fisheries Science.

• 2008-06-01

著者

• KOBAYASHI TAKAYUKI

  Central Research Laboratory, Ebarajitsugyo Co., Ltd

• NAGASE TOSHIYA

  Central Research Laboratory, Ebarajitsugyo Co., Ltd

• HINO AKINORI

  Graduate School of Agricultural and Life Sciences, The University of Tokyo

• TAKEUCHI TOSHIO

  Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology

• Hino Akinori

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• Nagase Toshiya

  Central Research Laboratory Ebarajitsugyo Co. Ltd

• Takeuchi Toshio

  Graduate School Of Marine Science And Technology Tokyo University Of Marine Science And Technology

• Kobayashi Takayuki

  Central Research Laboratory Ebarajitsugyo Co. Ltd

関連論文

• Effect of combination feeding of Nannochloropsis and freshwater Chlorella on the fatty acid composition of rotifer Brachionus plicatilis in a continuous culture
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