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Clearance rates of sessile rotifers:In situdeterminations

✍ Scribed by Robert L. Wallace; Peter L. Starkweather

Publisher
Springer
Year
1983
Tongue
English
Weight
397 KB
Volume
104
Category
Article
ISSN
1573-5141

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✦ Synopsis

Clearance rates of three sessile and four free-swimming rotifer species from a small acid bog-pond were measured using in situ techniques . Three radioactively labeled cell types, an alga (Chlamydomonas), a bacterium (Enterobacter = Aerobacter), and a yeast (Rhodotorula) were used as tracers . Clearance rates (using yeast) ranged from <1 .0 to >250 Β΅lanimal -1 . h-1 depending on species . Ptygura crystallina, Ptygura pilula, Floscularia conifera, and an unidentified bdelloid ingested all three foods with substantial variation in clearance rates among species and cell type . There was an insignificant error (<0 .3%) in clearance rate associated with non-ingestive uptake of radioactivity . Among the free-swimming taxa, Lecane sp . had a clearance rate of <0 .5 Β΅l . animal -1 . h -1 on yeast, while another Lecane sp . and Trichotria tetractis did not ingest that cell type .

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