Prof Beth Okamura

Prof Beth Okamura

Merit Researcher

Department: Life Sciences
Division: LS Invertebrates
Contact: email

Specialisms

Bryozoa, Disperal, Evolutionary ecology, Host-parasite interactions, Myxozoa

Summary

My interests are in the ecology and evolution animals whose life cycles contrast with those of traditionally studied and familiar animal systems. I specifically focus on two such invertebrata taxa, the Bryozoa and the Myxozoa. Bryozoans grow as colonies that spread across surfaces in freshwater and marine environments, and myxozoans are endoparasitic cnidarians that have undergone a spectacular radiation to exploit marine, freshwater and terrestrial hosts, including freshwater bryozoans. My research aims to: 1) elucidate the ecological and evolutionary consequences associated with such life cycles, and; 2) use these animals as model systems to answer general ecological and evolutionary questions. Areas of current interests and research include: • eDNA sampling for novel endoparasite diversity • Dispersal impacts on biodiversity, community assembly and ecosystem services • Environmental change, emerging diseases and disease risks • Exploitation of colonial hosts by endoparasites and host responses • Covert infection strategies • Diversification of freshwater bryozoans and myxozoans • Ecology, evolution and development of active, worm-like myxozoans • Life history responses to environmental change

Qualifications

Degrees

PhD in Zoology, University of California, Berkeley, United States

Honours BSc in Biology, Concordia University, Canada

Employment history

Academic

Merit Researcher, Natural History Museum, Life Sciences, United Kingdom, 2009 - ongoing

Research Leader, Natural, Life Sciences, United Kingdom, 2007 - ongoing

Professor, University of Reading, School of Biological Sciences, United Kingdom, 2005 - 2007

Reader, University of Reading, School of Biological Sciences, United Kingdom, 2001 - 2005

Lecturer, University of Reading, School of Biological Sciences, United Kingdom, 1997 - 2001

Lecturer, University of Bristol, School of Biological Sciences, United Kingdom, 1993 - 1997

Departmental Demonstrator, University of Oxford, Zoology, United Kingdom, 1988 - 1993

Tutorial Fellow, Magdalen College, Oxford, United Kingdom, 1988 - 1993

Killam Postdoctoral Fellow, Dalhousie University, Canada, 1987 - 1988

Smithsonian Postdoctoral Fellow, Smithsonian Marine Station at Link Port, United States, 1985 - 1986

NATO Postdoctoral Fellow, University of Wales, Bangor, United Kingdom, 1984 - 1985

Publications

McClelland HLO, Taylor PD, O'Dea A, Okamura B (2014) Revising and refining the bryozoan zs-MART seasonality proxy. Palaeogeography, Palaeoclimatology, Palaeoecology, 410 : 412 - 420. doi: 10.1016/j.palaeo.2014.06.011

Hartikainen H, Gruhl A, Okamura B (2014) Diversification and repeated morphological transitions in endoparasitic cnidarians (Myxozoa: Malacosporea). Molecular Phylogenetics and Evolution, 76 : 261 - 269. doi: 10.1016/j.ympev.2014.03.010

Filippenko D, Hartikainen H, Okamura B, Vasemägi A (2014) Characterisation of polymorphic microsatellite loci for the bryozoan Fredericella sultana, the primary host of the causative agent of salmonid proliferative kidney disease. Conservation Genetics Resources, 6 (2): 481 - 482. doi: 10.1007/s12686-013-0133-0

Ragazzola F, Taylor PD, Bazzicalupo P, Okamura B, Schmidt DN (2014) A new species of the cheilostome bryozoan Chiastosella in the Southern Ocean, past and present. Polar Biology, 37 (6): 773 - 779. doi: 10.1007/s00300-014-1478-x

ABD-ELFATTAH AHMED, FONTES I, KUMAR GOKHLESH, SOLIMAN HATEM, HARTIKAINEN HANNA, OKAMURA BETH, EL-MATBOULI MANSOUR (2014) Vertical transmission of Tetracapsuloides bryosalmonae (Myxozoa), the causative agent of salmonid proliferative kidney disease. Parasitology, 141 (4): 482 - 490. doi: 10.1017/S0031182013001650

Hartikainen H, Stentiford GD, Bateman KS, Berney C, Feist SW, Longshaw M, Okamura B, Stone D, Ward G, Wood C, Bass D (2014) Mikrocytids Are a Broadly Distributed and Divergent Radiation of Parasites in Aquatic Invertebrates. Current Biology, 24 (7): 807 - 812. doi: 10.1016/j.cub.2014.02.033

Hartikainen H, Humphries S, Okamura B (2014) Form and metabolic scaling in colonial animals. Journal of Experimental Biology, 217 (5): 779 - 786. doi: 10.1242/jeb.093484

Hartikainen H, Ashford OS, Berney C, Okamura B, Feist SW, Baker-Austin C, Stentiford GD, Bass D (2014) Lineage-specific molecular probing reveals novel diversity and ecological partitioning of haplosporidians. Isme Journal, 8 (1): 177 - 186. doi: 10.1038/ismej.2013.136

Okamura B, O'Dea A, Taylor P, Taylor A (2013) EVIDENCE OF EL NINO/LA NINA-SOUTHERN OSCILLATION VARIABILITY IN THE NEOGENE-PLEISTOCENE OF PANAMA REVEALED BY A NEW BRYOZOAN ASSEMBLAGE-BASED PROXY. Bulletin of Marine Science, 89 (4): 857 - 876. doi: 10.5343/bms.2012.1041

Hartikainen H, Fontes I, Okamura B (2013) Parasitism and phenotypic change in colonial hosts. Parasitology, 140 (11): 1403 - 1412. doi: 10.1017/s0031182013000899

Okamura B, Ayres K, Salgado J, Davidson TA, Shaw RF, Stephens TW, Hoare D, Sayer CD (2013) Shallow lake sediments provide evidence for metapopulation dynamics: a pilot study. Aquatic Ecology, 47 (2): 163 - 176. doi: 10.1007/s10452-013-9432-5

HARTIKAINEN H, WAESCHENBACH A, Wöss E, Wood T, OKAMURA B (2013) Divergence and species discrimination in freshwater bryozoans (Bryozoa: Phylactolaemata). Zoological Journal of the Linnean Society, 168 (1): 61 - 80. doi: 10.1111/zoj.12025

GRUHL A, OKAMURA B (2012) Development and myogenesis of the vermiform Buddenbrockia (Myxozoa) and implications for cnidarian body plan evolution. Evodevo, 3 (1)doi: 10.1186/2041-9139-3-10

HARTIKAINEN H, OKAMURA B (2012) Castrating parasites and colonial hosts. Parasitology, 139 (4): 547 - 556. doi: 10.1017/s0031182011002216

O'Dea A, Håkansson E, TAYLOR PD, OKAMURA B (2011) Environmental change prior to the K-T boundary inferred from temporal variation in the morphology of cheilostome bryozoans. Palaeogeography Palaeoclimatology Palaeoecology, 308 : 502 - 512. doi: 10.1016/j.palaeo.2011.06.001

OKAMURA B, Feist SW (2011) Emerging diseases in freshwater systems.. Freshwater Biology, 56 (4)doi: 10.1111/j.1365-2427.2011.02578.x

OKAMURA B, HARTIKAINEN H, Schmidt-Posthaus H, Wahli T (2011) Proliferative kidney disease as an emerging disease: the importance of life cycle complexity and environmental change.. Freshwater Biology, 56 (4): 627 - 537. doi: 10.1111/j.1365-2427.2010.02465.x

Holland JW, OKAMURA B, HARTIKAINEN H, Secombes CJ (2011) A novel minicollagen gene links cnidarians and myxozoans.. Proceedings of the Royal Society London, Series B, 278 (1705)doi: 10.1098/rspb.2010.1301

Lister AM, Brooks SJ, Fenberg PB, Glover AG, James KE, Johnson KG, Michel E, Okamura B, Spencer M, Stewart JR, Todd JA, Valsami-Jones E, Young J (2011) Natural history collections as sources of long-term datasets. Trends in Ecology and Evolution, 26 (3): 153 - 154.

OKAMURA B, O'Dea A, Knowles T (2011) Bryozoan growth and environmental reconstruction by zooid size variation. Marine Ecology-Progress Series, 430 : 133 - 146. doi: 10.3354/meps08965

Evans NM, Holder MT, Barbeitos MS, OKAMURA B, Cartwright PT (2010) The phylogenetic position of Myxozoa: Exploring conflicting signals in phylogenomic and ribosomal datasets.. Molecular Biology and Evolution, 27 (12): 2733 - 2746. doi: 10.1093/molbev/msq159

Riisgård HU, OKAMURA B, Funch P (2010) Particle capture in ciliary-feeding gymnolaemate and phylactolaemate bryozoans: a comparative study.. Acta Zoologica (Stockholm), 91 (4): 416 - 425. doi: 10.1111/j.1463-6395.2009.00417.x

KNOWLES T, Leng MJ, Williams M, TAYLOR PD, Sloane HJ, OKAMURA B (2010) Interpreting seawater temperature range using oxygen isotopes and zooid size variation in Pentapora foliacea (Bryozoa). Marine Biology, 157 (6): 1171 - 1180. doi: 10.1007/s00227-010-1397-5

Clark N, Williams M, OKAMURA B, Smellie J, Nelson A, Knowles T, TAYLOR PD, Leng M, Zalasiewicz J, Hayward A (2010) Early Pliocene Weddell Sea seasonality determined from bryozoans. Stratigraphy, 7 : 199 - 206.

HARTIKAINEN H, Johnes P, MONCRIEFF C, OKAMURA B (2009) Bryozoan populations reflect nutrient enrichment and productivity gradients in rivers. Freshwater Biology, 54 (11): 2320 - 2334. doi: 10.1111/j.1365-2427.2009.02262.x

Tops S, HARTIKAINEN H, OKAMURA B (2009) The effects of infection by Tetracapsuloides bryosalmonae (Myxozoa) and temperature on Fredericella sultana (Bryozoa). International Journal of Parasitology, 39 (9)doi: 10.1016/j.ijpara.2009.01.007

Knowles T, TAYLOR PD, Williams M, Haywood AM, OKAMURA B (2009) Pliocene seasonality across the North Atlantic inferred from cheilostome bryozoans. Palaeogeography, Palaeoclimatology, Palaeoecology, 277 : 226 - 235. doi: 10.1016/j.palaeo.2009.04.006

Williams M, Haywood AM, Harper EM, Johnson ALA, KNOWLES T, Leng MLJ, Lunt DJ, OKAMURA B, TAYLOR PD, Zalasiewicz J (2009) Pliocene climate and seasonality in North Atlantic shelf seas. Philosophical Transactions of The Royal Society, Series A, 367 (1886): 85 - 108. doi: 10.1098/rsta.2008.0224

Canning EU, Curry A, Okamura B (2008) Early development of the myxozoan Buddenbrockia plumatellae in the bryozoans Hyalinella punctata and Plumatella fungosa, with comments on taxonomy and systematics of the Myxozoa. Folia Parasitologica, 55 (4): 241 - 255. doi: 10.14411/fp.2008.032

Knowles T, Haywood A, Williams M, TAYLOR PD, Okamura B (2008) Palaeoseasonality in the Pliocene of the North Atlantic. Geological Society of America Abstracts with Programs,

Jiménez-Guri E, Phillipe H, OKAMURA B, Holland PWH (2007) Buddenbrokia is a Cnidarian worm. Science, 317 (5834): 116 - 118. doi: 10.1126/science.1142024

Canning EU, Curry A, Hill SL, OKAMURA B (2007) Ultrastructure of Buddenbrockia allmani n. sp (Myxozoa, Malacosporea), a parasite of Lophopus crystallinus (Bryozoa, Phylactolaemata). Journal of Eukaryotic Microbiology, 54 (3): 247 - 262. doi: 10.1111/j.1550-7408.2007.00261.x

Hill SLL, OKAMURA B (2007) Endoparasitism in colonial hosts: patterns and processes. Parasitology, 134 (6): 841 - 852. doi: 10.1017/S0031182007002259

Hill SLL, Sayer CD, HAMMOND PM, Rimmer VK, Davidson TA, Hoare DJ, Burgess A, Okamura B (2007) Are rare species rare or just overlooked? Assessing the distribution of the freshwater bryozoan, Lophopus crystallinus. Biological Conservation, 135 : 223 - 234.

Jiménez-Guri E, OKAMURA B, Holland PWH (2007) Origin and evolution of a myxozoan worm. Integrative and Comparative Biology, 47 (5): 752 - 758. doi: 10.1093/icb/icm026

Tops S, Lockwood W, Okamura B (2006) Temperature-driven proliferation of Tetracapsuloides bryosalmonae in bryozoan hosts portends salmonid declines. Diseases of Aquatic Organisms, 70 (3): 227 - 236. doi: 10.3354/dao070227

Bell JJ, Okamura B (2005) Low genetic diversity in a marine nature reserve: re-evaluating diversity criteria in reserve design. Proceedings of the Royal Society B: Biological Sciences, 272 (1567): 1067 - 1074. doi: 10.1098/rspb.2005.3051

Canning EU, Feist SW, Longshaw M, Okamura B, Anderson CL, Tse MT, Curry A (2005) Microgemma vivaresi n. sp. (Microsporidia, Tetramicridae), infecting liver and skeletal muscle of sea scorpions, Taurulus bubalis (Euphrasen 1786) (Osteichthyes, Cottidae), an inshore, littoral fish. The Journal of Eukaryotic Microbiology, 52 : 1 - 9.

Hill S, Okamura B (2005) A review of the ecology of Lophopus crystallinus (Plumatellida, Lophopodidae), a rare species within the U.K.. Denisia, 16 : 193 - 201.

Tops A, Curry A, Okamura (2005) Diversity and systematics of the Malacosporea (Myxozoa). Invertebrate Biology, 124 : 285 - 295.

Tops S, Okamura B (2005) Malacosporean parasites (Myxozoa, Malacosproea) of freshwater bryozoans (Bryozoa, Phylactolaemata): a review. Denisia, 16 : 287 - 298.

Wood TS, Okamura B. , (2005) A key to the freshwater bryozoans of Europe and the British Isles with ecological notes. Freshwater Biological Association, The Ferry House, Far Sawrey, Ambleside, Cumbria, UK.

Henderson M, Okamura B (2004) The phylogeography of salmonid proliferative kidney disease in Europe and North America. Proceedings of the Royal Society B: Biological Sciences, 271 (1549): 1729 - 1736. doi: 10.1098/rspb.2004.2677

Tops S, Baxa DV, McDowell TS, Hedrick RP, Okamura B (2004) Evaluation of malacosporean life cycles through transmission studies. Diseases of Aquatic Organisms, 60 (2): 109 - 121. doi: 10.3354/dao060109

Wood TS, Okamura B (2004) Plumatella geimermassardi, a newly recognized freshwater bryozoan from Britain, Ireland, and continental Europe (Bryozoa: Phylactolaemata). Hydrobiologia, 518 : 1 - 7. doi: 10.1023/B:HYDR.0000025051.65713.85

Canning EU, Okamura B (2004) Biodiversity and evolution of the Myxozoa. Advances in Parasitology, 56 : 43 - 151.

Figuerola J, Green AJ, Black K, Okamura B (2004) The influence of gut morphology on passive transport of freshwater bryozoans by waterfowl in Doñana (southwest Spain). Canadian Journal of Zoology, 82 : 835 - 840.

Freeland JR, Rimmer VK, Okamura B (2004) Evidence for a residual post-glacial founder effect in a highly dispersive freshwater invertebrate. Limnology and Oceanography, 49 (3): 879 - 883. doi: 10.4319/lo.2004.49.3.0879

De Kinkelin P, Okamura B, Hedrick RP, Baxa DV (2004) Malacosporean-like spores in urine of rainbow trout react with antibody and DNA probes to Tetracapsuloides bryosalmonae. Parasitology Research, 92 (1): 81 - 88. doi: 10.1007/s00436-003-0986-3

Tops S, Okamura B (2003) Infection of bryozoans by Tetracapsuloides bryosalmonae at sites endemic for salmonid proliferative kidney disease. Diseases of Aquatic Organisms, 57 (3): 221 - 226. doi: 10.3354/dao057221

Okamura B, Canning EU (2003) Orphan worms and homeless parasites enhance bilaterian diversity. Trends in Ecology & Evolution, 18 (12): 633 - 639. doi: 10.1016/j.tree.2003.09.017

Horton T, Okamura B (2003) Post-haemorrhagic anaemia in sea bass, Dicentrarchus labrax (L.), caused by blood feeding of Ceratothoa oestroides (Isopoda: Cymothoidae). Journal of Fish Diseases, 26 (7): 401 - 406. doi: 10.1046/j.1365-2761.2003.00476.x

Freeland JR, Lodge RJ, Okamura B (2003) Sex and outcrossing in a sessile freshwater invertebrate. Freshwater Biology, 48 : 301 - 305.

Okamura B, Wood TS (2002) Bryozoans as hosts for Tetracapsula bryosalmonae, the PKX organism. Journal of Fish Diseases, 25 (8): 469 - 475. doi: 10.1046/j.1365-2761.2002.00376.x

De Meester L, Gómez A, Okamura B, Schwenk K (2002) The Monopolization Hypothesis and the dispersal–gene flow paradox in aquatic organisms. Acta Oecologica, 23 (3): 121 - 135. doi: 10.1016/S1146-609X(02)01145-1

OKAMURA B, CURRY A, WOOD TS, CANNING EU (2002) Ultrastructure of Buddenbrockia identifies it as a myxozoan and verifies the bilaterian origin of the Myxozoa. Parasitology, 124 (2): 215 - 223. doi: 10.1017/S0031182001001184

Canning EU, Refardt D, Vossbrinck CR, Okamura B, Curry A (2002) New diplokaryotic microsporidia (Phylum, Microsporidia) from freshwater bryozoans (Bryozoa, Phylactolaemata). European Journal of Protistology, 38 : 247 - 265.

Canning EU, Tops SA, Curry A, Wood TS, Okamura B (2002) Ecology, development and pathogenicity of Buddenbrockia plumatellae Schröder, 1910 (Myxozoa, Malacosporea) (syn. Tetracapsula bryozoides) and establishment of Tetracapsuloides n. gen. for Tetracapsula bryosalmonae. The Journal of Eukaryotic Microbiology, 49 : 280 - 295.

Hatton-Ellis T, Hope A, Noble LR, Okamura B (2002) Genetic variation in a freshwater bryozoan: II: The effect of increasing spatial scale. Archiv fur Hydrobiologie, 154 : 293 - 309.

Horton T, Okamura B (2002) The distribution of Ceratothoa steindachneri (Crustacea: Isopoda: Cymothoidae) parasitic in Echiichthys vipera in the north-east Atlantic. The Journal of the Marine Biological Association of the United Kingdom, 83 (415)

Monteiro AS, Okamura (2002) Orphan worm finds a home: Buddenbrockia is a myxozoan. Molecular Biology and Evolution, 19 : 968 - 971.

Okamura B, Freeland JR (2002) Gene flow and the evolutionary ecology of passively dispersing aquatic invertebrates. , Bullock JM, Kenward RE, Hails RS, Dispersal Ecology., pp. 194 - 216. Blackwell Publishing.

Okamura B, Freeland JR, Hatton-Ellis T (2002) Clones and metapopulations.. , , Reproductive Biology of Invertebrates. Volume XI. Progress in Asexual Reproduction., pp. 283 - 312. Oxford & IBH Publishing Co. Pvt. Ltd..

Bilton DT, Freeland JR, Okamura B (2001) DISPERSAL IN FRESHWATER INVERTEBRATES. Annual Review of Ecology and Systematics, 32 (1): 159 - 181. doi: 10.1146/annurev.ecolsys.32.081501.114016

Horton T, Okamura B (2001) Cymothoid isopod parasites in aquaculture: a review and case study of a Turkish sea bass (Dicentrarchus labrax) and sea bream (Sparus auratus) farm. Diseases of Aquatic Organisms, 46 (3): 181 - 188. doi: 10.3354/dao046181

Okamura B, Anderson CL, Longshaw M, Feist SW, Canning EU (2001) PATTERNS OF OCCURRENCE AND 18S rDNA SEQUENCE VARIATION OF PKX ( TETRACAPSULA BRYOSALMONAE ), THE CAUSATIVE AGENT OF SALMONID PROLIFERATIVE KIDNEY DISEASE. Journal of Parasitology, 87 (2): 379 - 385. doi: 10.1645/0022-3395(2001)087[0379:POOARS]2.0.CO;2

Feist SW, Longshaw M, Canning EU, Okamura B (2001) Induction of Proliferative Kidney Disease (PKD) in rainbow trout (Oncorhynchus mykiss Richardson) via the bryozoan Fredericella sultana (Blumenbach, 1779), infected with Tetracapsula bryosalmonae Canning, Curry, Feist, Longshaw & Okamura, 1999. Diseases of Aquatic Organisms, 45 (61)

Freeland JR, Rimmer VK, Okamura B (2001) Genetic changes within freshwater bryozoan populations suggest temporal gene flow from statoblast banks. Limnology and Oceanography, 46 : 1121 - 1129.

Gay M, Okamura B, de Kinkelin P (2001) Evidence that infectious stages of Tetracapsula bryosalmonae for rainbow trout, Oncorhynchus mykiss, are present throughout the year. Diseases of Aquatic Organisms, 46 : 31 - 40.

Okamura B, Harmelin J-G, Jackson JBC (2001) Refuges revisited: Enemies versus flow and feeding as determinants of sessile animal distribution and form. , Jackson JBC, Lidgard S, McKinney FK, Evolutionary Patterns: Growth, Form and Tempo in the Fossil Record., pp. 61 - 93. University of Chicago Press.

O'Dea A, Okamura B (2000) Intracolony variation in zooid size in cheilostome bryozoans as a new technique for investigating palaeoseasonality. Palaeogeography, Palaeoclimatology, Palaeoecology, 162 : 319 - 332. doi: 10.1016/S0031-0182(00)00136-X

Freeland , Noble , Okamura (2000) Genetic consequences of the metapopulation biology of a facultatively sexual freshwater invertebrate. Journal of Evolutionary Biology, 13 (3): 383 - 395. doi: 10.1046/j.1420-9101.2000.00192.x

Anderson CL, Canning EU, Schafer SM, Yokoyama H, Okamura B (2000) Molecular confirmation of the life cycle of Thelohanellus hovorkai Achmerov, 1960 (Myxozoa: Myxosporea). Bulletin of the European Association of Fish Pathologists, 20 : 111 - 115.

Canning EU, Curry A, Feist SW, Longshaw M, Okamura B (2000) A new class and order of myxozoans to accommodate parasites of bryozoans with ultrastructural observations on Tetracapsula bryosalmonae (PKX organism). The Journal of Eukaryotic Microbiology, 47 : 456 - 468.

Freeland JR, Noble LR, Okamura B (2000) Genetic diversity of North American populations of Cristatella mucedo, inferred from microsatellite and mitochondrial DNA. Molecular Ecology, 9 : 1375 - 1389.

Freeland JR, Romualdi C, Okamura B (2000) Gene flow and genetic diversity: a comparison of freshwater bryozoan populations in Europe and North America. Heredity, 85 : 498 - 508.

O'Dea A, Okamura B (2000) Life history and environmental inference through retrospective morphometric analysis of bryozoans: a preliminary study. The Journal of the Marine Biological Association of the United Kingdom, 80 : 1127 - 1128.

O'Dea A, Okamura B (1999) Influence of seasonal variation in temperature, salinity and food availability on module size and colony growth of the estuarine bryozoan Conopeum seurati. Marine Biology, 135 (4): 581 - 588. doi: 10.1007/s002270050659

Freeland JR, Jones CS, Noble LR, Okamura B (1999) Polymorphic microsatellite loci identified in the highly clonal freshwater bryozoan Cristatella mucedo.. Mol Ecol, 8 (2): 341 - 342.

Anderson CL, Canning EU, Okamura B (1999) Molecular data implicate bryozoans as hosts for PKX (Phylum Myxozoa) and identify a clade of bryozoan parasites within the Myxozoa. Parasitology (Cambridge), 119 : 555 - 561.

Anderson CL, Canning EU, Okamura B (1999) 18S rDNA sequences indicate that PKX organism parasitizes Bryozoa.. Bulletin of the European Association of Fish Pathologists, 19 : 94 - 97.

Canning EU, Curry A, Anderson CL, Okamura B (1999) Ultrastructure of Myxidium trachinorum n. sp. from the gall bladder of the lesser weever fish Echiichthys vipera. Parasitology Research, 85 : 910 - 919.

Canning EU, Curry A, Feist SW, Longshaw M, Okamura B (1999) Tetracapsula bryosalmonae n.sp. for PKX organism the cause of PKD in salmonid fish. Bulletin of the European Association of Fish Pathologists, 19 : 203 - 206.

Longshaw M, Feist SW, Canning EU, Okamura B (1999) First identification of PKX in bryozoans from the United Kingdom - molecular evidence. Bulletin of the European Association of Fish Pathologists, 19 : 146 - 149.

Okamura B, Partridge JC (1999) Suspension feeding adaptations to extreme flow environments in a marine bryozoan. Biological Bulletin, 196 : 205 - 215.

Wood TS, Okamura B (1999) Asajirella gelatinosa in Panama: a bryozoan range extension in the Western Hemisphere (Ectoprocta: Phylactolaemata). Hydrobiologia, 390 : 19 - 23.

Eckman JE, Okamura B (1998) A Model of Particle Capture by Bryozoans in Turbulent Flow: Significance of Colony Form. The American Naturalist, 152 (6): 861 - 880. doi: 10.1086/286214

HATTON-ELLIS TRISTANW, NOBLE LESLIER, OKAMURA BETH (1998) Genetic variation in a freshwater bryozoan. I: Populations in the Thames basin, UK. Molecular Ecology, 7 (11): 1575 - 1585. doi: 10.1046/j.1365-294x.1998.00492.x

Anderson CL, Canning EU, Okamura B (1998) A triploblast origin for Myxozoa?. Nature, 392 : 346 - 347.

Canning EU, Okamura B, Curry A (1997) A new microsporidium, Nosema cristatellae n. sp. in the bryozoan Cristatella mucedo (Bryozoa, Phylactolaemata). Journal of Invertebrate Pathology, 70 : 177 - 183.

Okamura B (1997) Genetic similarity, parasitism, and metapopulation structure in a cyclically clonal bryozoan. , Streit B, Evolutionary Ecology of Freshwater Animals., pp. 294 - 320. Birkhauser Verlag.

Okamura B (1997) The ecology of subdivided populations of a clonal freshwater bryozoan in southern England. Archiv fur Hydrobiologie, 141 : 13 - 34.

Canning EU, Okamura B, Curry A (1996) Development of a myxozoan parasite Tetracapsula bryozoides n.g., n.sp. in the body cavity of Cristatella mucedo (Bryozoa, Phylactolaemata). Folia Parasitologica, 43 : 249 - 261.

Okamura B (1996) Occurrence, prevalence, and effects of the myxozoan Tetracapsula bryozoides Canning, Okamura and Curry, 1996, parasitic in the freshwater bryozoan Cristatella mucedo Cuvier (Bryozoa, Phylactolaemata). Folia Parasitologica, 43 : 262 - 266.

Vernon JG, Okamura B, Jones CS, Noble LR (1996) Temporal patterns of clonality and parasitism in a population of freshwater bryozoans. Proceedings of the Royal Society Series B, 263 : 1313 - 1318.

Okamura B, Hatton-Ellis T (1995) Population biology of freshwater bryozoans: correlates of sessile, colonial life histories in freshwater habitats. Experientia, 51 : 510 - 525.

JONES CS, OKAMURA B, NOBLE LR (1994) Parent and larval RAPD fingerprints reveal outcrossing in freshwater bryozoans. Molecular Ecology, 3 (3): 193 - 199. doi: 10.1111/j.1365-294X.1994.tb00052.x

Okamura B, Doolan LA (1993) Patterns of suspension feeding in the freshwater bryozoan Plumatella repens. Biological Bulletin, 184 : 52 - 56.

Okamura B, Jones CS, Noble LR (1993) Randomly amplified polymorphic DNA analysis of clonal population structure and geographic variation in a freshwater bryozoan. Proceedings of the Royal Society Series B, 253 : 147 - 154.

Okamura B (1992) Microhabitat variation and patterns of colony growth and feeding in a marine bryozoan. Ecology, 73 : 1502 - 1513.

Okamura B (1990) Behavioural plasticity in the suspension feeding of benthic animals. , , Behavioural Mechanisms of Food Selection., pp. 637 - 660. Springer-Verlag.

Okamura B (1990) Particle size, flow velocity, and suspension-feeding by the erect bryozoans Bugula neritina and B. stolonifera. Marine Biology: international journal on life in oceans and coastal waters, 105 : 33 - 38.

Okamura B (1988) The influence of neighbors on the feeding of an epifaunal bryozoan. Journal of Experimental Marine Biology and Ecology, 120 (2): 105 - 123. doi: 10.1016/0022-0981(88)90083-4

Okamura B, Bishop JDD (1988) Zooid size in cheilostome bryozoans as an indicator of relative palaeotemperature. Palaeogeography, Palaeoclimatology, Palaeoecology, 66 : 145 - 152. doi: 10.1016/0031-0182(88)90197-6

Okamura B (1987) Seasonal changes in zooid size and feeding activity in epifaunal colonies of Electra pilosa. , Ross JRP, null., pp. 197 - 204. Western Washington University, Bellingham, WA.

Okamura B (1987) Particle size and velocity induce an inferred switch in bryozoan suspension-feeding behaviour. Biological Bulletin, 173 : 222 - 229.

Okamura B (1986) Group living and the effects of spatial position in aggregations of Mytilus edulis. Oecologia, 69 (3): 341 - 347. doi: 10.1007/BF00377054

Okamura B (1986) Formation and disruption of aggregations of Mytilus edulis in the fouling community of San Francisco Bay, California. Marine Ecology Progress Series, 30 : 275 - 282.

Okamura B (1985) The effects of ambient flow velocity, colony size, and upstream colonies on the feeding success of Bryozoa. II. Conopeum reticulum (Linnaeus), an encrusting species. Journal of Experimental Marine Biology and Ecology, 89 (1): 69 - 80. doi: 10.1016/0022-0981(85)90082-6

Okamura B (1984) The effects of ambient flow velocity, colony size, and upstream colonies on the feeding success of bryozoa. I. Bugula stolonifera Ryland, an arborescent species. Journal of Experimental Marine Biology and Ecology, 83 (2): 179 - 193. doi: 10.1016/0022-0981(84)90044-3

Highlighted publications

Hartikainen H, Gruhl A, Okamura B (2014) Diversification and repeated morphological transitions in endoparasitic cnidarians (Myxozoa: Malacosporea). Molecular Phylogenetics and Evolution, 76 : 261 - 269. doi: 10.1016/j.ympev.2014.03.010

HARTIKAINEN H, WAESCHENBACH A, Wöss E, Wood T, OKAMURA B (2013) Divergence and species discrimination in freshwater bryozoans (Bryozoa: Phylactolaemata). Zoological Journal of the Linnean Society, 168 (1): 61 - 80. doi: 10.1111/zoj.12025

GRUHL A, OKAMURA B (2012) Development and myogenesis of the vermiform Buddenbrockia (Myxozoa) and implications for cnidarian body plan evolution. Evodevo, 3 (1)doi: 10.1186/2041-9139-3-10

HARTIKAINEN H, OKAMURA B (2012) Castrating parasites and colonial hosts. Parasitology, 139 (4): 547 - 556. doi: 10.1017/s0031182011002216

Jiménez-Guri E, Phillipe H, OKAMURA B, Holland PWH (2007) Buddenbrokia is a Cnidarian worm. Science, 317 (5834): 116 - 118. doi: 10.1126/science.1142024

Hill SLL, OKAMURA B (2007) Endoparasitism in colonial hosts: patterns and processes. Parasitology, 134 (6): 841 - 852. doi: 10.1017/S0031182007002259