Rotifera VIII: a Comparative Approach: Proceedings of the VIIIth International Rotifer Symposium, Held in Collegeville, Minn. , U. S. A. , 22-27 June 1997

__Rotifera VIII: A Comparative Approach__ is a record of the proceedings of the VIIIth International Rotifer Symposium which was held in Collegeville, Minnesota, USA, on June 22-27, 1997. It contains review papers and reports of recent research findings along with the presentation of new methods in rotifer biology. The publications contained in this volume reflect the wide diversity of approaches, methods of analysis and conclusions that characterize research on the Rotifera. Some of the topics addressed are: rotifer distribution, responses to biotic and abiotic factors, genetic profile of individuals and populations, rotifer feeding and mating behavior, morphology, phylogeny and taxonomy. These studies will be of great interest to invertebrate zoologists and limnologists, particularly those interested in freshwater habitats. Front Matter....Pages i-xv History of rotifer research in northern Europe....Pages 1-8 An analysis of taxonomic studies on Rotifera: a case study....Pages 9-14 Zooplankton may not disperse readily in wind, rain, or waterfowl....Pages 15-21 Freshwater Rotifera of the genus Lecane from Songkhla Province, southern Thailand....Pages 23-26 Rotifera of some freshwater habitats in the floodplain of the River Nan, northern Thailand....Pages 27-33 On a new species of Keratella (Rotifera: Monogononta: Brachionidae)....Pages 35-37 Floodplain biodiversity: why are there so many species?....Pages 39-46 Rotifer diversity in a central Mexican pond....Pages 47-54 Rotifers new to Florida, U.S.A.....Pages 55-62 Dicranophoridae (Rotifera) from the Alps....Pages 63-77 Remarks on the rotifer fauna of north and northwestern Russia....Pages 79-82 Review paper : The evolutionary relationships of rotifers and acanthocephalans....Pages 83-91 Opinion paper : Are lemnisci and proboscis present in the Bdelloidea?....Pages 93-96 Numerical phenetic taxonomy and its heuristic aspects....Pages 97-100 Phylogenetic relationships of phylum Rotifera with emphasis on the families of Bdelloidea....Pages 101-107 Cross-mating tests re-discovered: a tool to assess species boundaries in rotifers....Pages 109-115 Preparation of rotifer trophi for light and scanning electron microscopy....Pages 117-121 Stereopictures of internal structures and trophi of rotifers....Pages 123-129 The rotifer corona by SEM....Pages 131-134 Catecholaminergic neurons in the brain of rotifers....Pages 135-140 Review paper : Rotifer responses to increased acidity: long-term patterns during the experimental manipulation of Little Rock Lake....Pages 141-152 Review paper : Rotifers in arctic North America with particular reference to their role in microplankton community structure and response to ecosystem perturbations in Alaskan Arctic LTER lakes....Pages 153-160 Rotifer vertical distribution in a strongly stratified lake: a multivariate analysis....Pages 161-170 Influence of environmental factors on the rotifer assemblage in an artificial lake....Pages 171-178 Rotifers in relation to littoral ecotone structure in Lake Rotomanuka, North Island, New Zealand....Pages 179-197 Zooplankton succession and thermal stratification in the polymictic shallow Müggelsee (Berlin, Germany): a case for the intermediate disturbance hypothesis?....Pages 199-206 Comparison of processes regulating zooplankton assemblages in new freshwater pools....Pages 207-214 Effects of turbidity and biotic factors on the rotifer community in an Ohio reservoir....Pages 215-223 Differences in rotifer populations of the littoral and sub-littoral pools of a large marine lagoon....Pages 225-230 Review paper : Rotifers in interstitial sediments....Pages 231-240 Effects of contrasting land use on free-swimming rotifer communities of streams in Masurian Lake District, Poland....Pages 241-249 A study of rotifers in the River Thames, England, April–October, 1996....Pages 251-257 Planktonic rotifers of Samborombón River Basin (Argentina)....Pages 259-265 Review paper : Chemical ecology of rotifers....Pages 267-276 Differential sensitivity of Synchaeta and Daphnia to nucleosides from Anabaena affinis ....Pages 277-281 Toxicity of the Chrysophyte flagellate Poterioochromonas malhamensis to the rotifer Brachionus angularis ....Pages 283-287 Influence of abiotic and biotic factors on morphological variation of Keratella cochlearis (Gosse) in a small Andean lake....Pages 289-294 Diel variation in the egg ratio of Hexarthra bulgarica in the high mountain lake La Caldera (Spain)....Pages 295-300 Strategic variation of egg size in Keratella cochlearis ....Pages 301-310 Relative investment in offspring by sessile Rotifera....Pages 311-316 The paradox of bdelloid egg size....Pages 317-320 Anhydrobiotic capabilities of bdelloid rotifers....Pages 321-326 Factors affecting long-term survival of dry bdelloid rotifers: a preliminary study....Pages 327-331 Some notes on Brachionus rotundiformis (Tschugunoff) in Lake Palaeostomi....Pages 333-340 Effect of temperature and food concentration in two species of littoral rotifers....Pages 341-348 Population growth in planktonic rotifers. Does temperature shift the competitive advantage for different species?....Pages 349-353 Carbon content of some freshwater rotifers....Pages 355-360 Review paper : Seasonal variation as a determinant of population structure in rotifers reproducing by cyclical parthenogenesis....Pages 361-372 Review paper : Ecological genetics of Brachionus sympatric sibling species....Pages 373-384 Allozyme electrophoresis: its application to rotifers....Pages 385-393 Measurements of the genome size of the monogonont rotifer Brachionus plicatilis and of the bdelloid rotifers Philodina roseola and Habrotrocha constricta ....Pages 395-402 Karyotypes of bdelloid rotifers from three families....Pages 403-407 Does the evasive behavior of Hexarthra influence its competition with cladocerans?....Pages 409-419 Colony size in Conochilus hippocrepis : defensive adaptation to predator size....Pages 421-425 Spatial segregation between rotifers and cladocerans mediated by Chaoborus ....Pages 427-436 Morphotype-specific predation in the trimorphic rotifer Asplanchna silvestrii ....Pages 437-444 Uptake of latex beads as size-model for food of planktonic rotifers....Pages 445-449 Ecology versus taxonomy: is there a middle ground?....Pages 451-457 Ecological water quality assessment of the Bütgenbach lake (Belgium) and its impact on the River Warche using rotifers as bioindicators....Pages 459-467 Size-structure dynamics of the rotifer chemostat: a simple physiologically structured model....Pages 469-476 Rotifer size distribution changes during transient phases in open cultures....Pages 477-482 Influence of the food ration and individual density on production efficiency of semicontinuous cultures of Brachionus -fed microalgae dry powder....Pages 483-487 Effect of water viscosity on the population growth of the rotifer Brachionus plicatilis Müller....Pages 489-494 Probiotic culture of the rotifer Brachionus plicatilis ....Pages 495-498 Containing proceedings of the VIIIth International Rotifer Symposium which was held in Collegeville, Minnesota, USA, on June 22-27, 1997, this volume includes review papers and reports of recent research findings along with the presentation of new methods in rotifer biology.