caa a22 4500 469096047 CHVBK 20180323133031.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00317458 doi (NATIONALLICENCE)springer-10.1007/BF00317458 Schmid-Araya J. Biologische Station Lunz, Institut für Limnologie, Österreichische Akademie der Wissenschaften, Seehof 4, A-3293, Lunz am See, Austria aut The biochemical composition and calorific content of a rotifer and its algal food: comparison of a two stage chemostat and batch culture [Elektronische Daten] [J. Schmid-Araya] It is often assumed that the use of a two-stage chemostat yields algal food with a well-defined nutritional composition that can maintain herbivores in a steady state of growth. In this study I investigated two bacteriafree culture techniques, continuous flow chemostats and batch cultures, to determine whether the biochemical composition of the rotifer Encentrum linnhei differed in the two cultures. Changes in the biochemical composition and calorific content of the algal food were also examined. In the rotifer reaction vessel only the lipid content of the algal food increased significantly with dilution rates, while significant decreases in protein and carbohydrates were detected at increasing algal densities. A different pattern was observed in the response of the unused algal cells to variables such as dilution, algal input and algal densities in the sump of the rotifer chemostat. In the chemostat the biochemical composition of the rotifers varied as expected with dilution rates, algal input and food availability but significant differences were found in the biochemical composition of the animals growing in the reaction vessel and those collected from the sump. In contrast, the biochemical content of batch-grown E. linnhei varied with time in a way that depended upon food availability and also on the biochemical state of the algal food. However, at the end of the exponential phase of growth, when maximum densities had been achieved, batch-grown rotifers were more biochemically nutritious than chemostat-grown animals in their steady-state phase. Springer-Verlag, 1992 Chemostat nationallicence Batch culture nationallicence Biochemical composition nationallicence Encentrum linnhei nationallicence Oecologia Springer-Verlag 92/3(1992-12-01), 327-338 0029-8549 92:3<327 1992 92 442 https://doi.org/10.1007/BF00317458 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317458 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Schmid-Araya J. Biologische Station Lunz, Institut für Limnologie, Österreichische Akademie der Wissenschaften, Seehof 4, A-3293, Lunz am See, Austria aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/3(1992-12-01), 327-338 0029-8549 92:3<327 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer