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Aphids Vectors Health Biostats
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Aphids Vectors Health Biostats
 

 

About InfluentialPoints

Who we are

Bob Dransfield BSc (Hons.) Zool. (Bristol), MSc, D.Phil, PhD (Imperial)

Quantitative ecologist, applied entomologist, biostatistics consultant, conservation and development advisor. Macro-photographer.

  • (2003-current) Partner InfluentialPoints, providing statistical training, biostatistics course development, and biodiversity surveys.
  • (1999-2002) Technical Assistant (FITCA) European Union Regional Tsetse and Trypanosomiasis Control Programme, Uganda Component.
  • (1991-1998) Project Manager (OSCDP), then Pastoralist NGO Strengthening Programme Coordinator, SNV-Netherlands Development Development Organisation, Kenya.
  • (1982-1990) Senior Research Scientist, Nguruman Tsetse and Trypanosomiasis Project Leader. International Centre for Insect Physiology and Ecology, Nairobi, Kenya.
    Concurrently Biostatistics adviser & lecturer. Acting Head, ICIPE Biostatistics Dept. (1983-1984).
    (1986-1994) Member of WHO Steering Committee on African Trypanosomiases. (1990-1991) Committee Chairman.
  • (1976-1982) Senior Lecturer, Department of Zoology, University of Jos, Nigeria.
    Concurrently: Joint coordinator Medical Entomology M.Sc. course.
  • Supervised 14 Postgraduate Students.

Bob Dransfield is also the UK aphid verifier for iRecord  the Biological Record Center of the National Biodiversity Network (NBN UK).

Bob Brightwell BSc (Hons.) Biol. (Hatfield)

Field ecologist, applied biologist, gadget and website builder. Computer programmer, nonparametric statistical simulation modeller.

  • (1999-current) Partner InfluentialPoints, providing statistical advice, course development, and biodiversity surveys.
  • (1991-1998) Development adviser (OSCDP then KEPDA). SNV, Nairobi, Kenya.
  • (1984-1991) Senior Research Assistant, Nguruman Tsetse and Trypanosomiasis Project, Tsetse Research Programme, ICIPE.
  • (1980-1984) Senior Technologist, Anaesthetics. Technologist, Dept. Pharmacology. Jos University Teaching Hospital, University of Jos, Nigeria.
    Concurrently: Performed tsetse population dynamics research, Yankari Game Reserve.

Our Research Publications

  • Reid, S., Dransfield, R.D, Brightwell, R., Hall, J. & Hodgetts, J. (2015). Essigella californica (Aphidoidea, Aphididae), a pine-feeding aphid new to Britain. Br. J. Ent. Nat. Hist. 28, 121-124. Full text 
  • Dransfield, R.D. & Brightwell, R. (2015). Colour in aphids - Aposematic, cryptic or both? Antenna (Bulletin of the Royal Entomological Society) 39(2), 60-71.
  • Brightwell, R. & Dransfield, R. (2013). How to Get on Top of Statistics (or how to avoid and detect statistical malpractice): Design and analysis for biologists, with R. InfluentialPoints. 1200 pp html. Full text 
  • Dransfield, R. & Brightwell, R. (2011). Why does medical research sometimes get it so wrong? SACEMA quarterly (March). Full text 
  • Dransfield, R.D., Brightwell, R. (2004). Community participation in tsetse control: the principles, potential and practice. pp. 533-546 in Maudlin, I., Holmes, P.H. & Miles, M.A. The trypanosomiases. CABI. Abstract 
  • Brightwell, R., Dransfield, R., Maudlin, I., Stevenson, P. & Shaw, A. (2001). Reality vs. rhetoric - a survey and evaluation of tsetse control in East Africa. Agriculture and Human Values 18(2), 219-233. Abstract  Full text 
  • Dransfield R.D. & Brightwell R., (2001). Trap efficiency for Glossina pallidipes (Diptera: Glossinidae) at Nguruman, south-west Kenya. Bulletin of entomological Research. 91(6), 429-444. Abstract 
  • Brightwell, R., Kamanga, J. & Dransfield, R.D. (1998). Key livestock diseases of dryland Kenya - a handbook for identifying and treating diseases of cows, sheep and goats; in English and Kiswahili. KEPDA, Nairobi. 183 pp.
  • Brightwell, R., Dransfield, R.D., Stevenson, P. & Williams, B. (1997). Changes over twelve years in populations of Glossina pallidipes and Glossina longipennis (Diptera: Glossinidae) subject to varying trapping pressure at Nguruman, south-west Kenya. Bull. ent. Res. 87, 349-370. Full text 
  • Brightwell, R. & Dransfield, R.D. (1997). Odour attractants for tsetse Glossina austeni, G. brevipalpis and G. swynnertoni. Med. Vet. Entomol. 11, 297-299. Abstract 
  • Williams, B., Dransfield, R., Brightwell, R. & Rogers, D. (1993). Trypanosomiasis - Where are we now? Health Policy and Planning 8, 85-93. Abstract 
  • Williams, B., Dransfield, R., Brightwell, R. & Rogers, D.J. (1993). Ten best readings in ... trypanosomiasis. Health Policy and Planning. 8, 82-84.
  • Mwangelwa, M.I., Dransfield, R.D., Otieno, L.H. & Mbata, K.J. (1993). The responses of Glossina fuscipes fuscipes to odour attractants and traps. Journal of African Zoology 109, 23-30.
  • Dransfield, R.D. & Brightwell (1992). Training Manual for Tsetse Control Personnel. Volume 4. Use of attractive devices for tsetse survey and control. FAO, Rome, 1992. 196 pp. Full text 
  • Brightwell, R., Dransfield, R.D. & Williams, B. (1992). Factors affecting seasonal dispersal of the tsetse flies Glossina pallidipes (Austen) and G. longipennis Corti (Diptera: Glossinidae) at Nguruman, south-west Kenya. Bull. ent. Res., 82, 167-182. Abstract  Full text 
  • Williams, B., Dransfield, R. & Brightwell, R. (1992). The control of tsetse flies in relation to fly movement and trapping efficiency. J. Appl. Ecol. 29, 163-179. Full text 
  • Dransfield, R.D., Williams, B. & Brightwell, R. (1991). Control of tsetse flies and trypanosomiasis: Myth or reality. Parasit. Today 7, 287-291. Abstract 
  • Dransfield, R.D., Brightwell, R., Kyorku, C. & Williams, B. (1991). Changes in tsetse species composition after suppression of G. pallidipes and G. longipennis populations at Nguruman, South West Kenya. pp 175-185 In: 20th Meeting of the International Scientific Council for Trypanosomiasis Research and Control, Mombasa March 1989. OAU/STRC, Nairobi.
  • Randolph, S.E., Rogers, D.J., Dransfield, R.D. & Brightwell, R. (1991). Trap catches, nutritional condition and the timing of activity of the tsetse fly Glossina longipennis (Diptera: Glossinidae). Bull. ent. Res. 81, 455-464. Full text 
  • Brightwell, R., Dransfield, R.D. & Kyorku, C. (1991). Development of a low-cost tsetse trap and odour baits for Glossina pallidipes and G. longipennis. Med. Vet. Entomol. 5, 153-164. Abstract 
  • Tikubet, G., Dransfield, R.D., Otieno, L.H. & Morghan, H. (1991). Direct estimation of tsetse challenge and trypanosomiasis risk in South-Western Ethiopia. pp 168-173, In: 20th Meeting of the International Scientific Council for Trypanosomiasis Research and Control, Mombasa March 1989. OAU/STRC, Nairobi.
  • Dransfield, R.D., Brightwell, R., Kyorku, C. & Williams, B. (1990). Control of tsetse (Diptera: Glossinidae) populations using traps at Nguruman, Kenya. Bull. ent. Res. 80, 265-276. Full text 
  • Mwangelwa, M.I., Dransfield, R.D., Otieno, L.H. & Mbata, K.J. (1990). Distribution and diel activity patterns of Glossina fuscipes fuscipes Newstead on Rusinga Island and mainland in Mbita, Kenya. Insect Sci. Applic. 11, 315-321. Abstract 
  • Williams, B., Dransfield, R.D. & Brightwell, R. (1990). Tsetse fly population dynamics and the estimation of mortality rates from life-table data. Bull. ent. Res. 80, 479-485. Full text 
  • Kyorku, C., Brightwell, R. & Dransfield, R.D. (1990). Odour baits and traps for the tsetse fly Glossina longipennis Corti. Bull. ent. Res. 80, 405-415. Abstract 
  • Dransfield, R.D. & Brightwell, R. (1989). Problems of field testing theoretical models : A case study. Ann. Soc. belge Med. trop. 69, Suppl.1, 147-154. Full text 
  • Dransfield, R.D., Brightwell, R., Kiilu, J., Chaudhury, M.F. & Adabie, D.A. (1989). Size and mortality rates of Glossina pallidipes Austen in the semi-arid zone of southwestern Kenya. Med. Vet. Entomol. 3, 83-95. Abstract  Full text 
  • Williams, B., Brightwell, R. & Dransfield, R.D. (1989). Monitoring tsetse fly populations. II. The effect of climate on trap catches of Glossina pallidipes. Med. Vet. Entomol. 4, 181-193. Abstract 
  • Williams, B., Dransfield, R.D. & Brightwell, R. (1989). Monitoring tsetse fly populations I. The intrinsic variability of trap catches of Glossina pallidipes at Nguruman, Kenya. Med. Vet. Entomol. 4, 167-179. Abstract 
  • Randolph, S.E., Dransfield, R.D. & Rogers, D.J. (1989). Effect of host odours on trap catch composition of Glossina pallidipes in Kenya. Med. Vet. Entomol. 3. . Full text 
  • Saini, R.K., Hassanali, A. & Dransfield, R.D. (1989). Antennal responses of tsetse to analogues of the attractant 1-octen-3-ol. Physiol. Entomol. 14, 85-90. Abstract 
  • Kiragu, J.M. & Dransfield, R.D. (1988). Resting sites and predation levels of adult Glossina pallidipes Austen at Nguruman, South-Western Kenya. pp 128-130. In: Recent advances in medical research with a symposium on appropriate technology in disease control. Proc. 8th Annual Medical Scientific Conference, Nairobi, Kenya 1987. KEMRI & KETRI, Nairobi. Abstract 
  • Brightwell, R., Dransfield, R.D., Kyorku, C., Golder, T.K., Tarimo, S.R., & Mungai,D. (1987). A new trap for Glossina pallidipes. Trop. Pest Manage. 33, 151-159. Abstract 
  • Darlington, J.P.E.C. & Dransfield, R.D. (1987). Size relationships in nest populations and mound parameters in the termite Macrotermes michaelseni in Kenya. Insectes Sociaux 34, 165-180. Abstract 
  • Saini, R.K. & Dransfield, R.D. (1987). A behavioural bioassay to identify attractive odours for Glossinidae. Med. Vet. Entomol. 1, 313-318. Abstract 
  • Dransfield, R.D., Brightwell, R., Chaudhury, M.F., Golder, T.K. & Tarimo, S.A.R. (1986). The use of odour attractants for sampling Glossina pallidipes Austen (Diptera: Glossinidae) at Nguruman, south-western Kenya. Bull. ent. Res. 76, 607-619. Abstract 
  • Dransfield, R.D. (1986). Overview of tsetse control strategies : need for reappraisal. The Kenya Veterinarian 10, 4. Full text 
  • Dransfield, R.D., Chaudhury, M.F.B., Tarimo, S.A., Golder, T.K. & Brightwell, R. (1986). Population dynamics of Glossina pallidipes Austen under drought conditions at Nguruman, Kenya. In: Eighteenth Meeting of the International Scientific Council for Trypanosomiasis Research and Control, Harare, Zimbabwe, 1985. OAU/STRC, Nairobi..
  • Turner, D.A. & Brightwell, R. (1986). An evaluation of a sequential spraying operation against Glossina pallidipes Austen (Diptera: Glossinidae) in the Lambwe Valley of Kenya, aspects of post-spray recovery and evidence of natural population regulation. Bull. Ent. Res. 76, 331-349. Abstract 
  • Tarimo, S.F., Snow, F.W., Butler, L. & Dransfield, R.D. (1985). The probability of tsetse acquiring trypanosome infection from a single blood meal in different localities in Kenya. Acta Trop. 42, 199-207. Abstract 
  • De Castro, J.J., Young, A.S., Dransfield, R.D., Cunningham, M.P., Dolan, T.T. (1985). Effects of tick infestation on Boran (Bos indicus) cattle immunised against theileriosis in an endemic areas of Kenya. Res. Vet. Sci. 39, 279-288. Abstract 
  • De Castro, J.J., Cunningham, M.P., Dolan, T.T., Dransfield, R.D., Newson, R.M. & Young, A.S. (1985). Effects on cattle of artificial infestations with the tick Rhipicephalus appendiculatus. Parasitology 90. Abstract 
  • McDowell, P.G., Hassanali, A. & Dransfield, R. (1985). Activity of the diastereoisomers of 13,12 dimethylpentatriacontane, the sex pheromone of Glossina pallidipes, and comparison with the natural pheromone. Physiol. Entomol. 10, 183-190. Abstract 
  • Dransfield, R.D. (1984). The range of attraction of the biconical trap for Glossina pallidipes and Glossina brevipalpis. Insect Sci. Applic. 5, 363-368. Abstract 
  • Subra, R. & Dransfield, R.D. (1984). Field observations on competitive displacement, at the preimaginal stage, of Culex quinquefasciatus Say by Culex cinereus Theobald (Diptera: Culicidae) at the Kenya Coast. Bull. ent. Res. 74, 559-568. Abstract 
  • Dransfield, R.D., Golder, T.K., Tarimo, S., Chaudhury, M.E.A, (1983). Preliminary observations on tsetse fly population dynamics and trypanosomiasis challenge at Nguruman, Kenya. Kenya Veterinarian 7, 21. Abstract 
  • Dransfield, R.D. & Brightwell, R. (1983). A new sampling technique for studying population dynamics of tsetse flies. pp 17-24 In: Ilemobade, A.A. (ed.) Proc 1st Nat. Conf. Tsetse Tryp. Res. Nigeria, Kaduna, 10-12 August 1981. Abstract 
  • Dransfield, R.D., Brightwell, R., Onah, J. & Okolo, C.J. (1982). Population dynamics of Glossina morsitans submorsitans Newstead and G. tachinoides Westwood (Diptera: Glossinidae) in sub-Sudan savanna in northern Nigeria. I. Sampling methodology for adults and seasonal changes in numbers caught in different vegetation types. Bull. ent. Res. 72, 175-192. Abstract 
  • Kavanagh, J.P., Brightwell, R., Bardsley, W.G. & Schnieden, H. (1981). Levamisole and other diamine oxidase inhibitors as inhibitors of sperm motility. Archives of Andrology 7, 51-62. Abstract 
  • Alo, E.B. & Dransfield, R.D. (1981). The effect of date of infection by maize streak virus (MSV) on the growth and yield of rain fed maize at Riyom, Plateau State, Nigeria. Bull. ent. Soc. Nig.
  • Ejike, C. & Dransfield, R.D. (1980). Studies on the inorganic constituents of the intermoult cuticle of the crab, Sudonautes africanus (Milne Edwards). Rev. Zool. Afr. 93, 36-52.Abstract 
  • Dransfield, R.D. (1979). Aspects of host-parasitoid interactions of two aphid parasitoids, Aphidius urticae (Haliday) and Aphidius uzbeckistanicus (Luzhetski) (Hymenoptera, Aphidiidae). Ecol. entomol. 4, 307-316. Abstract 
  • Dransfield, R.D. (1975). The Ecology of Grassland and Cereal Aphids. PhD Thesis, University of London.

Selected Reports & Conference Papers

  • Dransfield, R.D. & Brightwell, R. (2017). Aphids at Bedgebury Pinetum, Kent. 2015 - 2016 survey. Forestry Commission, National Pinetum survey report. 21 pp. Full text 
  • Dransfield, R.D. & Brightwell, R. (2016). Aphids at Bedgebury Pinetum, Kent. 2014 - 2015 survey. Forestry Commission, National Pinetum survey report. 18 pp. Full text 
  • Dransfield, R.D. & Brightwell, R. (2015). Aphids at Dundreggan, Scotland, July 2015 survey. Trees for Life Dundreggan estate biodiversity survey report. 93 pp. Full text 
  • Brightwell, R. & Dransfield, R.D. (2014). Survey of Tabanidae (horseflies) in southern England 2014. A preliminary survey of tabanids using odour-baited NG2F traps. 14 pp. Full text 
  • Dransfield, R.D. & Brightwell, R. (2013). Aphids and their natural enemies and mutualists at Dundreggan, Scotland. Trees for Life Dundreggan estate biodiversity survey report. 105 pp. Full text 
  • Brightwell, R., Dransfield, R., Kamanga, J., Ogunde, W. & Adan I. (1997). The use of theatre for community mobilization. Report on KEPDA Theatre Input to Kathekani Tsetse Project. 23 pp.
  • Brightwell, R., Dransfield, R., Kamanga, J., Ogunde, W. & Adan I. (1997). The use of theatre for community mobilization. Summarised KEPDA's theatre approach to inform and involve the Kathekani community tsetse control project, the project's principle risks and constraints, and discussed the problems of using theatre for development. 23 pp.
  • Brightwell, R., Dransfield R., Kamanga, J., Ogunde, W. & Adan I. (1996). Developing Drama in Development. An interim report analysing the evolution of theatre within SNV as a developmental tool for the rural and urban poor in pastoralist Kenya. 37 pp.
  • Kamanga, J. & Brightwell, R. (1994). Building on Strength in Pastoralist areas. Proceedings of a workshop of Kenyan pastoralists on constraints and possibilities for economic development. 23 pp.
  • Brightwell, R., & Dransfield, R. (1994). Talking with Pastoralists (a report on discussions with Kenyan pastoralists). Analysis of semi-structured interviews of pastoralists on their problems in making a living, reactions to the ideas that SNV was putting forward, and their ideas for the future. 91 pp.
  • Brightwell, R., Dransfield, R. (1994). Talking with pastoralists. SNV Report for Pastoralist Professional Group. 91 pp.
  • Dransfield, R., Brightwell, R., Kanunka J., Kamanga, J. & Adan, I. (1994). On the Socioeconomic Empowerment of Pastoralists (conservation and development of Kenyan rangelands). Survey of the developmental constraints and opportunities open to Kenyan pastoralists. 90 pp.
  • Dransfield, R.D., Brightwell, R., Kanunka, J., Kamanga J. & Adan, I. (1994). On the socioeconomic empowerment of pastoralists (Conservation and development of Kenyan rangelands). SNV Discussion Document. 90 pp.
  • Brightwell, R., & Dransfield, R. (1993). Olkiramatian and Shompole Community Development Project (OSCDP). Final report to SNV on the achievements, problems and future prospects of the project. 86 pp.
  • Dransfield, R.D. & Brightwell, R. (1993). Project Report. Olkiramatian and Shompole Community Development Project (OSCDP). Unpublished SNV-Kenya Report.
  • Dransfield, R., & Kanunka, J.L. (1991). Community-based tsetse control on Olkiramatian and Shompole Group Ranches. Paper presented at The Second Conference on the Future of Maasai Pastoralists in Kajiado District, Kajiado, 18-21 August 1991.
  • Crees, M. & Dransfield, R.D. (1990). Report on tsetse control project at Mbeya, Tanzania. FAO Report.
  • Brightwell, R., Dransfield, R.D & Williams, B. (1989). Seasonal dispersal of Glossina pallidipes in relation to reinvasion into control areas. Paper presented at International Study Workshop on Tsetse Population Ecology and Behaviour, Nairobi, 6 - 11 August 1989.
  • Kruska, R.L, Williams, B., Dransfield, R.D & Brightwell, R. (1989). The use of geographic information systems and remote sensing for analyzing tsetse fly distribution and movement. Paper presented at International Study Workshop on Tsetse Population Ecology and Behaviour, Nairobi, 6 - 11 August 1989.
  • Williams, B., Dransfield, R.D & Brightwell, R. (1989). Modelling tsetse movement. Paper presented at International Study Workshop on Tsetse Population Ecology and Behaviour, Nairobi, 6 - 11 August 1989.
  • Dransfield, R.D., Brightwell, R., & Williams, B. (1989). Mark-release-recapture studies on Glossina pallidipes at Nguruman, Kenya. Paper presented at International Study Workshop on Tsetse Population Ecology and Behaviour, Nairobi, 6 - 11 August 1989.
  • Dransfield, R.D. & Brightwell, R. (1988). Suppression of a G. pallidipes population using odour baited NGU traps at Nguruman, south-western Kenya. Invited paper presented at KETRI/ KVA Workshop on Regional Development and Implementation of Tsetse Control Strategies for Eastern Africa - with emphasis on targets and traps, 7 - 8 March, KETRI, Muguga, Kenya.
  • Dransfield, R.D. (1987). Ecological and epidemiological data base required for control of animal and human trypanosomiasis. Invited paper presented at Workshop on Integrated Tsetse and Trypanosomiasis Control in Uganda, 20 - 23 May, Uganda.
  • Dransfield, R.D., Brightwell, R. & Adabie, D. (1986). Population dynamics of the tsetse fly Glossina pallidipes Austen at Nguruman, south-western Kenya. Paper presented at the First International Conference on Tropical Entomology, 31 August - 5 September 1986. Nairobi, Kenya.

 

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