ERGEBNISSE DER LIMNOLOGIE

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1 ARCHIV F()R HYDRO BIO LOG IE Organ der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie B EIH E FT AGI-Information Management Consultants May be used for personal purporses only or by libraries associated to dandelon.com network. ERGEBNISSE DER LIMNOLOGIE Herausgegeben von igsntum des Landes Vorarlberg Chemischs Versuchsanstalt I n v s n t a r l s l e r t HRter tir._jk 11 \ *> Prof. Dr. H.-J. ELSTER Limnologisches Institut der Universitat Freiburg Konstanz/Bodensee Prof. Dr. W. OHLE Max-Plan ck-institut fiir Limnologie Plon/Holstein Heft 8 Proceedings of the First International Rotifer Symposium edited by CHARLES E. KING With 2 plates, 95 figures and 40 tables in the text E. Schweizerbart'sche Verlagsbuchhandlung (Nagele u. Obermiller) Stuttgart 1977

2 Table of Contents Preface List of participants 7 : 1 Topic I - "> Sampling rotifers.j. Green 9 Comment: ;, Comparison of various sampling techniques, and results of repeated sampling of planktonic rotifers A. Ruttner-Kolisko 13 Topic II Migration, patchiness, and distribution in time and space of planktonic rotifers, Maria R. Miracle 19 Multivariate analysis of rotifer distributions in Lake Huron Richards. Stemberger and John E. Gannon 38 Horizontal distribution and "avoidance of shore" by rotifers K. Preissler 43 Phototaxis in rotifers (action spectra) Pierre Clement 47 Migration of planktonic rotifers in Lunzer Obersee (Austria) B, Pivoda 50 Adaptive advantages of substrate selection by sessile rotifers R. L. Wallace 5 3 Topic III Population dynamics and secondary production W. T. Edmondson 56 Lifespan of male rotifers Terry W, Snell 65

3 IV Table of Contents A tentative estimation of annual production for some periphytic rotifers with a unimodal phenology Henri J. Dumont, Marc Coussement, and Anne-Marie De Henau Suggestions for biomass calculation of planktonic rotifers A. Ruttner-Kolisko Topic IV The influence of abiotic environmental factors on population dynamics in planktonic rotifers, Wolfgang Hofmann Effects of thermal effluent upon the planktonic Rotifera survival and egg production J. P. K. Horkan, D. N. Gallup, and J. R. Nursall Population dynamics of rotifers as related to climatic conditions in Lunzer Obersee and Untersee Some effects of enclosure on congeneric species of rotifers A. Ruttner Kolisko M. R. Miracle and A. Guiset Topic V Biotic factors in the population dynamics of rotifers An analysis of the diets of five sympatric species of Asplanchna Stomach contents in Asplanchna and Ploesoma Rotifer populations in mountain lakes relative to fish and species of copepods present The effect of the microsporid Plistophora asperospora on Conochilus unicornis in Lunzer Untersee (LUS) Epidemiology in rotifers Henri J. Dumont George W. Salt A. Guiset R. Stewart Anderson A. Ruttner-Kolisko M. R. Miracle Topic VI Mictic-female production in monogonont rotifers John J. Gilbert

4 Table of Contents V A note on mictic-female production in monoxenic cultures of Brachionus calyciflorus JohnJ. Gilbert 156 A note on the effect of cold shock on mictic-female production in Brachionus calyciflorus JohnJ. Gilbert 158 A note on the relationship between polymorphism and mictic-female production in Brachionus calyciflorus JohnJ. Gilbert 161 Determination of mixis in Brachionus C. Rougier, R. Pourriot, and P. Clement 163 Physiological basis of the reproduction of heterogonous Rotatoria Hans Buchner 167 Rotifer reproduction under controlled experimental conditions J. M. Scott 169 Male production in seawater cultured Brachionus plicatilis M. Pozuelo 172 Comparison of the control of mixis in three clones oi Notommata copeus Roger Pourriot and Pierre Clement 174 Amphoteric reproduction in a population of Asplanchna priodonta A. Ruttner-Kolisko 178 Amphoteric reproduction in Asplanchna girodi Terry W. Snell and Charles E. King 182 Reproductive cycle in Sinantherina socialis P. Champ and R. Pourriot 184 Topic VII Genetics of reproduction, variation, and adaptation in rotifers Charles E. Kvng~ 187 Clonal selection: Competition among clones Terry W. Snell 202 Cytoplasmic and chromosomal inheritance of the mictic reaction in a parthenogenetic clone oi Notommata copeus Pierre Clement and Roger Pourriot 205 Effects of cyclical ameiotic parthenogenesis on gene frequencies and effective population size Charles E. King 207 Topic VIII General problems of rotifer taxonomy and global distribution Birger Pejler 212 Archiv f. Hydrobiologie. Beih. 8 1*

5 VI Table of Contents Classification based on the male M. Sudzuki 221 General distribution of planktonic rotifers in Spanish reservoirs A. Guiset 222 Studies on the distribution of Brachionus calyciflorus in India M. V. S. S. S. Dhanapathi 226 Some puzzling problems in the taxonomy of Brachionus and Keratella Dwarfing of rotifers in tropical crater lakes Some data on variation in three planktonic genera Antarctic freshwater rotifers M. Sudzuki J. Green A. Guiset H. J. G. Dartnall Topic IX Food and feeding habits of Rotifera R. Pourriot Radiotracer determination of feeding in Brachionus calyciflorus: The importance of gut passage times Experience with rotifer cultures based on Rhodomonas Selective cannibalism in the rotifer Asplanchna sieboldi Peter L. Starkweather and John J. Gilbert Birger Pejler JohnJ. Gilbert Topic X Ultrastructural research on rotifers Pierre Clement 270 Comment: Resting egg ultrastructure and formation of the shell in Asplanchna sieboldi and Brachionus calyciflorus Elizabeth Wurdak, John J. Gilbert, and Richard Jagels 298 Index of Authors 303 Index of Species 308 Subject-Index 313