Nutritional quality of a freshwater heterotrophic flagellate:: trophic upgrading of its microalgal diet for Daphnia hyalina
Nutritional quality of a freshwater heterotrophic flagellate:: trophic upgrading of its microalgal diet for Daphnia hyalina
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DOI：
10.3354/ame032203
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发表时间：
2003-06-06
影响因子：
1.4
通讯作者：
Bourdier, G
中科院分区：
文献类型：
--
作者：
Bec, A;Desvilettes, C;Bourdier, G
食菌性淡水异养鞭毛虫似乎太穷（n-3）系列多不饱和脂肪酸（PUFA），能够维持主要的浮游动物生长本身。本研究表明，异养鞭毛虫Aulacomonassubmarina以微藻为食时，无论是Rhoalacustris（AulacomonasR.）或长叶绿原藻（Aulacomonas/C.），结果表明，该种具有大量的（n-3）系列多不饱和脂肪酸。因此，A.多不饱和脂肪酸（PUFA）的组成似乎主要取决于其藻类食物。潜艇似乎赋予了它更多的20 PUFA和更多样化的PUFA组成。此外，本研究还表明，以Aulacomonas/C. (or Aulacomonas/R.）比C. elongatum（或分别为R. lacustris）。这表明A.潜艇转化膳食脂质的结果是其食物来源的生化价值被提升。
Bacterivorous freshwater heterotrophic flagellates seem to be too poor in (n-3) series polyunsaturated fatty acids (PUFA) to be able to sustain major zooplankton growth by themselves. This study shows that when the heterotrophic flagellate Aulacomonas submarina fed on microalgae, either Rhodomonas lacustris (Aulacomonas/R.) or Chlorogonium elongatum (Aulacomonas/C.), this species exhibited (n-3) series PUFA in great quantities. Therefore, A. submarina PUFA composition seems to depend mainly on its algal diet, However, the biosynthetic capacities of A. submarina seem to have endowed it with greater amounts of 20 PUFA and a more diversified PUFA composition. Moreover, this study also shows that Daphnia hyalina exhibits a higher fecundity when fed on Aulacomonas/C. (or Aulacomonas/R.) than is the case when fed on C. elongatum (or respectively R. lacustris). This suggests that the ability of A. submarina to convert dietary lipids results in the biochemical value of its food source being upgraded.