| molecular data implicate bryozoans as hosts for pkx (phylum myxozoa) and identify a clade of bryozoan parasites within the myxozoa. | proliferative kidney disease (pkd), a condition associated with high mortality in salmonid fish, represents an abnormal immune response to the presence of an enigmatic myxozoan, which has been designated simply as pkx organism because its generic and specific status are obscure. phylogenetic analyses of partial sequences of the 18s rdna of pkx and of myxozoan parasites infecting the bryozoans cristatella mucedo, pectinatella magnifica and plumatella rugosa, including the previously named tetraca ... | 1999 | 10633916 |
| freshwater and brackish bryozoan species of croatia (bryozoa: gymnolaemata, phylactolaemata) and their genetic identification. | freshwater and brackish species of bryozoans belong to the phylactolaemata and gymnolaemata class. twelve species of bryozoans were recorded and morphologically determined at eight locations in the black sea and the adriatic basin in croatia. twelve species of bryozoa have been listed in the taxonomic index for croatia (conopeum seurati, lophopus crystallinus paludicella articulata, cristatella mucedo, fredericella sultana, hyalinella punctata, plumatella casmiana, plumatella emarginata, plumate ... | 2015 | 26624355 |
| comparative morphology of the nervous system in three phylactolaemate bryozoans. | though some elements of the bryozoan nervous system were discovered 180 years ago, few studies of their neuromorphology have been undertaken since that time. as a result the general picture of the bryozoan nervous system structure is incomplete in respect of details and fragmentary in respect of taxonomic coverage. | 2015 | 26464575 |
| sensory elements and innervation in the freshwater bryozoan cristatella mucedo lophophore. | | 2014 | 24795188 |
| form and metabolic scaling in colonial animals. | benthic colonial organisms exhibit a wide variation in size and shape and provide excellent model systems for testing the predictions of models that describe the scaling of metabolic rate with organism size. we tested the hypothesis that colony form will influence metabolic scaling and its derivatives by characterising metabolic and propagule production rates in three species of freshwater bryozoans that vary in morphology and module organisation and which demonstrate two- and three-dimensional ... | 2014 | 24265433 |
| dormant stages in freshwater bryozoans--an adaptation to transcend environmental constraints. | freshwater invertebrates often disperse between discrete habitat patches via the production of dormant propagules. being dispersed passively by animal vectors or wind, certain adaptations for exposures to terrestrial and aerial conditions like desiccation and freezing are required. in the present study, we investigate the mechanisms of survival and physiological adaptations due to desiccation and low temperatures in the statoblasts of two populations of the freshwater bryozoan cristatella mucedo ... | 2011 | 21439966 |
| organogenesis in the budding process of the freshwater bryozoan cristatella mucedo cuvier, 1798 (bryozoa, phylactolaemata). | the phylogenetic position of bryozoans has been disputed for decades, and molecular phylogenetic analyzes have not unequivocally clarified their position within the bilateria. as probably the most basal bryozoans, phylactolaemata is the most promising taxon for large-scale phylogenetic comparisons. these comparisons require extending the morphological and developmental data by investigating different phylactolaemate species to identify basal characters and resolve in-group phylogeny. accordingly ... | 2011 | 21312230 |
| invertebrate eggs can fly: evidence of waterfowl-mediated gene flow in aquatic invertebrates. | waterfowl often have been assumed to disperse freshwater aquatic organisms between isolated wetlands, but no one has analyzed the impact of this transport on the population structure of aquatic organisms. for three cladocerans (daphnia ambigua, daphnia laevis, and sida crystallina) and one bryozoan (cristatella mucedo), we estimated the genetic distances between populations across north america using sequences of several mitochondrial dna genes and genotypic frequencies at allozyme and microsate ... | 2005 | 15729656 |
| gene flow and genetic diversity: a comparison of freshwater bryozoan populations in europe and north america. | we have used microsatellite and mitochondrial sequence data to gain insight into patterns of gene flow and genetic diversity among north american and european populations of the freshwater bryozoan cristatella mucedo. mitochondrial sequence data reveal numerous, widely distributed, divergent genetic lineages in north america that can be broadly categorized into two groups, one of which is genetically homogeneous and relatively similar to the european haplotypes, the other of which is more divers ... | 2000 | 11122429 |
| genetic diversity of north american populations of cristatella mucedo, inferred from microsatellite and mitochondrial dna. | research over the past 20 years has shown, with the help of molecular markers, that the population genetics and distribution patterns of freshwater invertebrates in north america are often more complex than was previously believed. here we extend this research to an, as yet, unstudied but widespread and common group, the freshwater bryozoans. colonies of the bryozoan cristatella mucedo were collected from a number of lakes across central north america, and were characterized genetically by analy ... | 2000 | 10972776 |
| polymorphic microsatellite loci identified in the highly clonal freshwater bryozoan cristatella mucedo. | | 1999 | 10065552 |
| genetic variation in a freshwater bryozoan. i: populations in the thames basin, uk. | in spite of increasing interest in metapopulation dynamics, the genetic consequences of a metapopulation structure remain poorly understood. here we examine the metapopulation genetic structure of the colonial, facultatively sexual freshwater bryozoan cristatella mucedo, in the thames basin of southern england, uk. populations from nine sites were sampled and colonies genetically characterized using random amplified polymorphic dna (rapd)-pcr. a total of 78 different clones was detected over all ... | 1998 | 9819908 |
| a new microsporidium, nosema cristatellae n. sp. in the bryozoan cristatella mucedo (bryozoa, phylactolaemata) | a microsporidian infecting cells of the body wall of the phylactolaemate bryozoan cristatella mucedo is described. all stages of the parasite are diplokaryotic and lie in direct contact with the host cell cytoplasm. sporogony is probably disporoblastic. spores measure 7.5 x 5.1 &mgr;m and have 22-32 coils of the polar tube arranged in several rows and a bell-like polaroplast of compact membranes. the parasite is assigned to the genus nosema as a new species, nosema cristatellae. it is differenti ... | 1997 | 9367723 |
| temporal patterns of clonality and parasitism in a population of freshwater bryozoans. | clonal reproduction is commonly incorporated into the life cycles of many metazoans. however, whether and how such highly clonal animals persist in the face of natural enemies remains poorly understood. here we report the first temporal genetic study of a clonal population, the freshwater bryozoan cristatella mucedo, and the associated prevalence of a myxozoan parasite. high levels of both clonality and parasitism persisted over a 3 year period. random amplified polymorphic dna markers revealed ... | 1996 | 8914329 |
| parent and larval rapd fingerprints reveal outcrossing in freshwater bryozoans. | the occurrence of outcrossing in benthic hermaphroditic colonial invertebrates has received much historical debate and little demonstration. direct genetic study of this question using routine techniques has been limited by both the amount of material required and the detection of adequate dna polymorphisms. however, the recent development of molecular techniques that require no a-priori sequence data provides new approaches to the characterization of both tiny and genetically similar individual ... | 1994 | 8061877 |
| randomly amplified polymorphic dna analysis of clonal population structure and geographic variation in a freshwater bryozoan. | the randomly amplified polymorphic dna (rapd) assay was used to identify genetic polymorphisms in three clonal populations of the freshwater bryozoan, cristatella mucedo, a species with few useful biochemical genetic markers. of the 19 decamer oligonucleotide primers screened, 13 gave clear, reproducible rapd profiles. clonal population structure was evident, and one clone was dominant at each site. cluster analysis grouped populations from more distant localities separately (thames valley and n ... | 1993 | 8397414 |
| [on the fine structure of the neurons of bryozoa cristatella mucedo cuv]. | | 1965 | 5836805 |