Open AccessComparison of Growth and Fatty Acids Composition of Freshwater Rotifer, Brachionus calyciflorus Pallas, Fed with Two Types of Microalgae at Different Concentrations
Author(s) -
Kennari Abdolmohammad Abedian,
Ahmadifard Nasrollah,
Seyfabadi Jafar,
Kapourchali Maryam Fallahi
Publication year - 2008
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.2008.00150.x
Subject(s) - rotifer , brachionus calyciflorus , biology , chlorella , algae , scenedesmus obliquus , brachionus , zoology , botany , fatty acid , chlorophyta , chlorophyceae , composition (language) , food science , population , ecology , biochemistry , linguistics , philosophy , demography , sociology
As algae and their concentrations are important factors for mass culture of rotifer, two experiments were conducted to find the effects of two types of algae, Chlorella sp. and Scenedesmus obliquus , and three concentration of chosen algae (0.1 × 10 6 , 1 × 10 6 , and 10 × 10 6 cells/mL) on growth and fatty acid composition of freshwater rotifer, Brachionus calyciflorus . The result of the first experiment showed that the maximum density of rotifer was significantly higher when fed with Chlorella sp. (478 individuals/mL) than fed with S. obliquus (328 individuals/mL). Mean population growth rate ( r ) was 0.61 and 0.44 for rotifer fed with Chlorella sp. and S. obliquus , respectively. The amount of highly unsaturated fatty acid (HUFA) in rotifer fed with Chlorella sp. (3.32%) was relatively more than those fed with S. obliquus (2.65%). Then, Chlorella sp. was selected based on better performance. In the second experiment, the maximum rotifer density of 108 ± 8, 489 ± 47, and 493 ± 51 individuals/mL was reached after 5 d for the respective Chlorella sp. concentrations; at concentration of 10 × 10 6 cells/mL, the maximum density of 1820 ± 47 individuals/mL was obtained. Mean growth rate at mentioned concentrations was 0.18, 0.42, and 0.51/d, respectively. Increase in algal concentration was associated with a relative increase in HUFA and decrease in monounsaturated fatty acid.