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Graham Holloway

Portrait of Graham Holloway

Associate Professor


Areas of interest

  • Stored Product Entomology
  • Insect and Bird Conservation
  • Impact of Landscape Structure and Composition on Biodiversity
  • Insect Colour Pattern Plasticity
  • Insect Taxonomy


  • Part 1. Animal Diversity
  • Part 1. Current Topics in Ecology and Zoology
  • Part 2. Residential Zoology Field Course
  • Part 2. Venoms and Poisons
  • Part 2. Biodiversity: exploiters and exploited
  • Part 3. Conservation Biology
  • Part 3. Research Projects
  • MSc Entomology: Techniques and Identification
  • MSc Winter Entomology Project
  • MSc Summer Entomology Project

Research centres and groups

Member of Centre for Wildlife Assessment and Conservation

Member of Impact, Enterprise and Outreach

  • Interviews with Radio Berkshire on wildlife issues
  • Seminars on wildlife issues to local interest parties
  • I organise short courses on Geographic Information Systems for Ecologists and Conservationists
  • Bug Club events for Amateur Entomological Society
  • British Entomological and Natural History Society meetings
  • Reading Scholars presentations
  • I run a twitter site (CWACReading) to encourage the engagement of students and public in wildlife conservation issues, species identification and monitoring.


Professional bodies/affiliations

International Collaborators

  • Dr Olajire Gbaya. Federal University, Akure, Nigeria
  • Dr Dimitris Bakaloudis. University of Thessaloniki

Selected publications

A full list of publications is available from ResearchGate.

Pre 2003

Holloway, G.J. (2002) Insect conservation - where are we going? Bulletin of the Royal Entomological Society 27, 320-323

Callaghan, A.; Fisher, T.C.; Grosso, A.; Holloway, G.J. & Crane, M. 2002 Effect of temperature and primiphos methyl on biochemical biomarkers in Chironomus riparius Meigen. Ecotoxicology and Environmental Safety 52, 128-133 (GJH 10%)

Holloway, G.J.; Gilbert, F. & Brandt, A. 2002 The relationship between mimetic imperfection and phenotypic variation in insect colour patterns. Proceedings of the Royal Society 269, 411-416.

Mpho, M.; Callaghan, A. & Holloway, G.J. 2002 Temperature and genotypic effects on life history and fluctuating asymmetry in a field strain of Culex pipiensHeredity 88, 307-312.

Mpho, M.; Callaghan, A. & Holloway, G.J. 2002 Effects of temperature and genetic stress on life history and fluctuating wing asymmetry in Culex pipiens mosquitoes. European Journal of Entomology 99, 405-412

Bakaloudis, D.E.; Vlachos, C.; Papageorghiou, N. & Holloway, G.J. 2001 Nest-site habitat selected by Short-toed Eagles Circaetus gallicus in Dadia Forest (North-eastern Greece). Ibis 143, 391-401

Mpho, M.; Holloway, G.J. & Callaghan, A. 2001 A comparison of the effects of organophosphate insecticide exposure and temperature stress on fluctuating asymmetry and life history traits in Culex quiquefasciatusChemosphere 45, 713-720 (GJH 40%)

Bakaloudis, D.E.; Vlachos, C.G. & Holloway, G.J. 2000 Nest features and nest-tree characteristics of short-toed eagles (Circaetus gallicus) in the Dadia-Lefkimi-Soufli Forest, North-eastern Greece. Journal of Raptor Research 34, 293-298.

Griffiths, G.H.; Holloway, G.J.; Richardson, P. & Howard, D.C. 2000 Genetic impact of habitat isolation on the Heath Fritillary in Kent, UK. In. (eds T. Clare & D. Howard) Quantitative Approaches to Landscape Ecology, International Association for Landscape Ecology, UK (GJH 25%)

Mpho, M.; Holloway, G.J. & Callaghan, A. 2000 Fluctuating wing asymmetry and larval density stress in Culex quiquefasciatus (Diptera: Culicidae). Bulletin of Entomological Research 90, 279-283 (GJH 40%)

Callaghan, A. & Holloway, G.J. 1999 The relationship between environmental stress and variance. Ecological Applications 9, 456-462.

Ottenheim, M. M.; Wertheim, B.; Holloway, G.J. & Brakefield, P.M. 1999 Survival of colour-polymorphic Eristalis arbustorum hoverflies in semi-field conditions. Functional Ecology 13, 72-77.

Vlachos, C.G.; Bakaloudis, D.E. & Holloway, G.J. 1999 Population trends of Black Vulture (Aegypius monachus) in Dadia Forest North-eastern Greece following the establishment of a feeding station. Bird Conservation International 9, 113-118.

Bakaloudis, D.E.; Vlachos, C. & Holloway, G.J. 1998 Habitat use by Short-toed Eagles (Circaetus gallicus) and their reptilian prey during the breeding season in Dadia forest (north-eastern Greece). Journal of Applied Ecology 35, 821-828.

Bakaloudis, D.; Vlachos, C.; Nasis, A. & Holloway, G. 1998 Distribution of raptors and reptiles in different habitat types in Dadia-Lefkimi Forest complex, N.E. Greece. Pp. 63-67. In: Landscapes, Livestocks and Livelihoods in European Less favoured Areas (eds A. Waterhouse & E. McEwan). Proceedings of EU EQULFA Project.

Callaghan, A.; Parker, P.J.A.N. & Holloway, G.J. 1998 The use of variance in enzyme activity as an indicator of long-term exposure to toxin-stressed environments in Culex pipiens mosquitoes. Functional Ecology 12, 436-441.

Holloway, G.J. & Bakaloudis, D.E. 1998 Europe's Snake Eagle. Biologist 45, 33-36.

Marriott, C.G. & Holloway, G.J. 1998 Colour pattern plasticity in Episyrphus balteatus: the critical immature stage and reaction norm on developmental temperature. Journal of Insect Physiology 44, 113-119.

Guntrip, J.; Sibly, R.M. & Holloway, G.J. 1997 The effect of novel environment and sex on the additive genetic variation and covariation in and between emergence body weight and development period in the Cowpea Weevil, Callosobruchus maculatus (Coleoptera, Bruchidae). Heredity 78, 158-165.

Holloway, G.J.; Crocker, H.J. & Callaghan, A. 1997 The effects of novel and stressful environments on trait distribution. Functional Ecology 11, 579-584.

Holloway, G.J.; Marriott, C.G. & Crocker, H.J. 1997 Phenotypic plasticity in hoverflies: the relationship between colour pattern and season in Episyrphus balteatus and other Syrphidae. Ecological Entomology 22, 425-432.

Ottenheim, M.M.; Volmer, A.D. & Holloway, G.J. 1996 The genetics of phenotypic plasticity in adult abdominal colour pattern of Eristalis arbustorum (Diptera: Syrphidae). Heredity 77, 493-499.

Holloway, G.J. & Brakefield, P.M. 1995 Artificial selection of reaction norms of wing pattern elements in Bicyclus anynanaHeredity 74, 91-99.

Holloway, G.J.; Brakefield, P.M.; de Jong, P.W.; Ottenheim, M.M.; de Vos, H.; Kesbeke, F. & Peynenburg, L. 1995 A quantitative genetic analysis of an aposematic colour pattern and its ecological implications. Philosophical Transactions of the Royal Society B 348, 373-379.

Ottenheim, M.M. & Holloway, G.J. 1995 The effect of diet and light on larval and pupal development of laboratory-reared Eristalis arbustorum (Diptera: Syrphidae). Netherlands Journal of Zoology 45, 305-314.

Ottenheim, M.M.; Waller, G.E. & Holloway, G.J. 1995 The influence of the development rates of immature stages of Eristalis arbustorum (Diptera: Syrphidae) on adult abdominal colour pattern. Physiological Entomology 20, 343-348.

Holloway, G.J. 1994 Separation of some Eristalis species using abdominal colour pattern. British Journal of the Entomological and Natural History Society 7, 99-101.

Holloway, G.J.; de Jong, P.W. & Ottenheim, M. 1993 The genetics and cost of chemical defense in the 2-spot ladybird (Adalia bipunctata). Evolution 47, 1229-1239.

Holloway, G.J. 1993 Phenotypic variation in colour pattern and seasonal plasticity in Eristalis hoverflies (Diptera: Syrphidae). Ecological Entomology 18, 209-217.

Holloway, G.J.; Brakefield, P.M. & Kofman, S. 1993 The genetics of wing pattern elements in the polyphenic butterfly Bicyclus anynanaHeredity 70, 179-186.

Ottenheim, P.M.; Holloway, G.J. & de Jong, P.W. 1992 Sex ratio in ladybirds (Coccinellidae). Ecological Entomology 17, 366-368.

Povey, S.R. & Holloway, G.J. 1992 The effect of energy trade-offs on life history and fitness in the rice weevil, Sitophilus oryzaeOikos 64, 441-450.

de Jong, P.W.; Holloway, G.J.; Brakefield, P.M. & de Vos, H. 1991 Chemical defence in ladybird beetles (Coccinellidae). II. Amount of reflex fluid, the alkaloid adaline and individual variation in defence in 2-spot ladybirds (Adalia bipunctata). Chemoecology 2, 15-19 (GJH 80%).

Holloway, G.J.; Brakefield, P.M.; Kofman, S. & Windig, J.J. 1991 An artificial diet for butterflies, including Bicyclus species, and its effect on development period, weight and wing pattern. Journal of the Lepidoptera Society 30, 121-128.

Holloway, G.J.; de Jong, P.W.; Brakefield, P.M. & de Vos, H. 1991 Chemical defence in ladybird beetles (Coccinellidae). I. Distribution of coccinelline and individual variation in defence in 7-spot ladybirds (Coccinella septempunctata). Chemoecology 2, 7-14.

Holloway, G.J. & McCaffery, A.R. 1990 Habitat utilisation and dispersion in Eristalis pertinax (Diptera, Syrphidae). The Entomologist 109, 116-124.

Holloway, G.J.; Povey, S.R. & Sibly, R.M. 1990 The effect of new environment on adapted genetic architecture. Heredity 64, 323-330.

Holloway, G.J.; Sibly, R.M. & Povey, S.R. 1990 Essay review: evolution in toxin stressed environments. Functional Ecology 4, 289-294.

Holloway, G.J. & Edwards, P.E. 1989 Biometrics, capture date and sex ratio in relation to migration in Blackcaps. Ringing and Migration 10, 108-112.

McCaffery, A.R; Gladwell, R.T.; Holloway, G.J., Little, E.J. & Walker, C.H. 1989 Detection and mechanisms of resistance in Heliothis spp.. Proceedings of the Beltwide Cotton Producers Conference, Nashville, Tennessee, USA (GJH 10%)

Smith, R.H. & Holloway, G.J. 1989 Population genetics and insect introductions. The Entomologist 108, 14-27.

Holloway, G.J. 1988 Susceptibility of varieties of sorghum (Sorghum bicolor Moench) grain to different geographical strains of Sitophilus oryzae L.. Tropical Pest Management 34, 423-425.

Holloway, G.J. & Mackness, M.I. 1988 The evolutionary adaptation of enzyme systems in Sitophilus oryzae fed on toxic legumes. Entomologia Experimentalis et Applicata 48, 165-172.

Holloway, G.J. & McCaffery, A.R. 1988 Reactive and preventative strategies for the management of insecticide resistance. pp 465-470 Proceedings of the British Crop Protection Conference: Pests and Diseases Brighton, UK.

Holloway, G.J. & Smith, R.H. 1987 Sexual selection of body weight in Sitophilus oryzae (L) (Coleoptera: Curculionidae). Journal of Stored Products Research 23, 197-202.

Holloway, G.J.; Smith, R.H.; Wrelton, A.E.; King, P.E.; Li Li Li & Menendez, G.T. 1987 Egg size and reproductive strategies in insects infesting stored-products. Functional Ecology 1, 229-236.

Holloway, G.J. 1986 A theoretical examination of the classical theory of the inheritance of insecticide resistance and the genetics of time to knockdown and dry body weight in Sitophilus oryzae (L.). Bulletin of Entomological Research 76, 661-670.

Holloway, G.J. 1986 The potency and effect of phytotoxins within yellow split-pea (Pisum sativum) and adzuki bean (Vigna angularis) on survival and reproductive potential of Sitophilus oryzae (Coleoptera: Curculionidae). Bulletin of Entomological Research 75, 287- 295.

Holloway, G.J. 1985 The effect of increased grain moisture content on some life history characters of Sitophilus oryzae (L) after staining egg plugs with acid fuchsin. Journal of Stored Products Research 21, 165-169.

Holloway, G.J. 1985 An analysis of inherited factors affecting the sex ratio in the rice weevil, Sitophilus oryzaeHeredity 55, 145-150.

Holloway, G.J. & Smith, R.H. 1985 Inheritance of the ability of Sitophilus oryzae (Coleoptera: Curculionidae) to feed and breed on yellow split-pea (Pisum sativum). Bulletin of Entomological Research 75, 367-375.


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