Graham J Holloway

Graham J Holloway
University of Reading · School of Biological Sciences

PhD Applied Entomology

About

130
Publications
36,554
Reads
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2,240
Citations
Introduction
My research is concerned principally with insect ecology and evolution. Specifically, the effects of landscape composition and configuration on local invertebrate diversity, the evolution of insect colour patterns and various applied aspects of insect pests of stored grain. I am the UK national recorder for the Dermestidae and interested in all aspects of Dermestidae. In addition to laboratory and field entomology I collaborate with The Hawk Conservancy Trust on the ecology of the white-headed vulture in Africa.
Additional affiliations
October 1993 - present
University of Reading
September 1989 - October 1993
Leiden University
October 1984 - September 1989
University of Reading
Position
  • Fellow
Description
  • Ecology of stored product Coleoptera
Education
October 1980 - March 1984
University of Reading
Field of study
  • Applied Zoology
October 1977 - July 1980
University of Sussex
Field of study
  • Biology

Publications

Publications (130)
Article
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The phenotypic and genetic variability of the aposematic colour pattern of the two-spot ladybird was investigated. There was significant variation in spot size (relative to elytron length) among wild populations of ladybirds. A quantitative genetic analysis revealed high heritability estimates for a number of individual colour pattern elements on t...
Article
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Central to the study of life cycle evolution is the concept of genetic trade-offs. Genetic trade-offs between life cycle characters develop as a result of the accumulation of genes with antagonistic pleiotropic effects. In the present study a comparison was made between the genetic architecture that had evolved in the ancestral environment and the...
Article
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1Dispersal is regarded as critical to the stability of existing populations and the spread of invading species, but empirical data on the effect of travelling conditions during the transfer phase are rare. We present evidence that both timing and distance of ex-natal dispersal in buzzards (Buteo buteo) are strongly affected by weather.2Dispersal wa...
Article
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7-spot ladybirds secrete alkaloid (coccinelline)-rich fluid (reflex blood) from leg joints as a defence mechanism against predators. A technique is described that enables the collection and accurate quantification of reflex blood produced, and the amount of coccinelline therein. Coccinelline was found distributed throughout the body, although conce...
Article
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Many hoverflies (Syrphidae) mimic wasps or bees through colour or behavioural adaptations. The relationship between phenotypic variation in colour pattern and mimetic perfection (as determined by pigeons) was investigated in three species of Müllerian mimics (Vespula spp.) and 10 Batesian hoverfly mimics, plus two non-mimetic species of flies. Four...
Article
Little is known about the eastern Palaearctic species Anthrenus nipponensis, a member of the Palaearctic A. pimpinellae species complex. In the current study, a morphometric examination of specimens held in the Natural History Museum, London, is carried out. A. nipponensis is larger and narrower than most other species belonging to the complex....
Article
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Twenty-three species belong to the Palaearctic Anthrenus pimpinellae complex. All Anthrenus spp. have intricate dorsal colour patterns. They can do this courtesy of the many small, coloured scales that coat their bodies, rather like Lepidoptera. All species within the complex are generally black/orange with an obvious trans-elytral wide band. One s...
Article
Bean beetles (Bruchinae) are a taxon of seed predators and several species are economically significant stored product pests. Seed quality may affect adult life history traits, with consequences for their population dynamics. We investigated if variation in host quality (poor quality: lentil; high quality: mung bean) as experienced by the parental...
Article
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A new species from Turkey, Anthrenus (s. str.) corona, belonging to the Anthrenus pimpinellae complex is presented. The species is described from a single specimen discovered in the collection held by the Natural History Museum, London. The species was uncovered during the dissection of many specimens for the purpose of curation. The species is com...
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Anthrenus dorsatus Mulsant et Rey 1868 is recorded from the United States for the first time. Species confirmation is achieved through dissection and genitalia examination. Images of A. p. pimpinellae Fabricius 1775 from the United States are examined and compared with confirmed images of A. p. pimpinellae from Europe. It is suggested that specimen...
Article
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On 26 October 2019 VS was walking by the allotment gardens near Eton at SU961780. Her attention was drawn to attractive weevils on hollyhocks Alcea rosea. At least four specimens were present; VS took one. The weevil had a very characteristic long, slender rostrum and proved to be hollyhock weevil Rhopalapion longirostre (Olivier). It was not until...
Article
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An important component of integrated pest management is vigilance. There is always the scope for pest species from other parts of the world to become established outside of their natural range. Here we report on a damaging infestation of natural history specimens by the Dermestid beetle Anthrenus flavipes LeConte 1854. The beetles caused considerab...
Article
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The Eurasian Black Vulture is a globally threatened raptor that in Southeast Europe only occurs in an isolated population in Greece. We examined the population viability for the species under demographic fluctuations and conservation scenarios. The current population showed no possibility of extinction for the next 100 years. However, simulated sce...
Article
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Abstract. For 160 years, Anthrenus pimpinellae isabellinus Küster, 1848 has been considered a subspecies of A. pimpinellae Fabricius, 1775. However, habitus shape differs between the subspecies with A. p. isabellinus being broader than A. p. pimpinellae and resembling more closely A. dorsatus Mulsant & Rey, 1868. Here A. p. pimpinellae and A. p. is...
Article
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a complete description of Attagenus rufiventris Pic, 1927 is provided for the first time. the habitus, antennae and ventrites are illustrated. females are marginally , but significantly, larger than males; both sexes are slightly over 4 mm long. Variation in the colour pattern is quantified and found to be little in both males and females. Both sex...
Article
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A new species, Anthrenus chikatunovi n. sp. from southern France is described and illustrated. externally, the species closely resembles A. pimpinellae pimpinellae. The main features distinguishing the new species from A. p. pimpinellae, and other potential confusion species, are on the genitalia.
Article
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Although the impacts of urbanisation on biodiversity are well studied, the precise response of some invertebrate groups remains poorly known. Dung-associated beetles are little studied in an urban context, especially in temperate regions. We considered how landscape heterogeneity, assessed at three spatial scales (250, 500 and 1000 m radius), media...
Article
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Recent research has shown that Anthrenus pimpinellae (Fabricius, 1775) is a complex of species numbering at least 21 in the Palearctic region. No work has been published illustrating what A. pimpinellae pimpinellae looks like relative to any other species in the complex, which interferes with accurate recording. Two species are considered here: A....
Article
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An important component of integrated pest management in natural history museums is the identification of pest insects. A small number of Anthrenus spp. can be encountered including A. verbasci, varied carpet beetle, and A. sarnicus, Guernsey carpet beetle. A species that would reasonably be expected to be found in natural history museums is A. muse...
Article
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A component of the British list of Dermestidae ( Anthrenus spp.) is checked for support from the scientific literature. No evidence is found for four of the species of Anthrenus on the British list existing as self-sustaining populations in Britain. It is argued that the number of species of Anthrenus on the British list should be reduced from nine...
Article
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Anthrenus dorsatus Mulsant & Rey, 1868 has been recorded from North Africa, Malta, and Iberia. During a recent visit to Thessaloniki, Greece, several Anthrenus species were collected, including A. dorsatus. The previously known distribution of A. dorsatus suggested that this species was restricted to the western Mediterranean basin, possibly with a...
Article
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AnupdatedchecklistoftheDermestidaeformainlandSpainandtheBalearicIslandsisproduced.Atotalof102species was found from existing lists and world catalogues, but no supporting scientific literature could be found for 26 of these species.Consequently,theproposalhereisthatthechecklistofDermestidaeforSpainshouldnumber76.Aconsiderationof the types of specie...
Poster
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A summary of my research undertaken so far, highlighting the variability of green space in the urban landscape surrounding project sites, and the beetle abundance found within them.
Article
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Context Maintaining biodiversity in multifunction landscapes is a significant challenge. Planning for the impacts of change requires knowledge of how species respond to landscape heterogeneity. Some insect groups are known to respond to heterogeneity at the mesoscale, defined here as hundreds of metres. However, for many taxa these effects are poor...
Article
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A study was carried out in May 2018 on the ground beetles of the Avon Valley, Dorset/Hampshire. Many Agonum spp. are typical of damp, marshy areas so to find four species of Agonum was not surprising. A pair of Agonum spp. that are sometimes confused are A. emarginatum (Gyllenhal) and A. viduum (Panzer). A. emarginatum is black whilst A. viduum is...
Article
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New distributional record for Trogoderma variabile in the UK
Article
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The carpet beetle Anthrenus dorsatus has previously been recorded from North Africa and Malta. During a recent visit to the island of Mallorca several Anthrenus species were collected which included a number of Anthrenus dorsatus specimens. This record adds a new species both to the island of Mallorca and to the Spanish checklist. These records ext...
Article
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A new species, Anthrenus amandae sp. nov., from Mallorca, Spain is described and illustrated. The species differs from likely confusion species on the basis of a combination of habitus morphometrics, antennal and male genitalia structure.
Article
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Pesticide resistance is normally associated with genetic changes, resulting in varied responses to insecticides between different populations. There is little evidence of resistance to plant allelochemicals; it is likely that their efficacy varies between genetically diverse populations, which may lead to the development of resistance in the future...
Data
Data points for An gambiae botanicals. (XLSX)
Article
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An examination of community structure and associative niche habitats on the Coleoptera of Dawlish Warren were carried out. The aim of this study was to better understand coleopteran communities frequently ignored in coastal habitats that are at significant risk of becoming endangered due to conflicting coastal human activities and rising sea levels r...
Article
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Rice weevil, Sitophilus oryzae, a cosmopolitan pest of stored cereals (including wheat and rice) is moved around inadvertently through global cereal trade. In this study, we consider the effect of strain origin and host food on the tolerance of S. oryzae to dichlorvos, a common insecticide used to protect stored grains in Nigeria. Three geographica...
Article
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Studies of insect population under fi eld conditions to establish survival rates, longevity and dispersal rates are rare in the literature. These types of studies are important and can be used to inform studies of the effects of landscape composition and confi guration on levels of biodiversity. Here the Cantharidae beetle, Rhagonycha fulva is stud...
Article
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Riparian habitats host a wide range of beetle species. Many of these species are quite rare, partly because so many streams are polluted to varying degrees and are frequently modified to facilitate water flow. Slapton Wood stream is neither heavily polluted nor modified. This short article reports on the species of beetle found along Slapton Wood s...
Article
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Dicranocephalus agilis is a monophagous insect, found on vegetated shingle and sand dunes, in association with sea spurge (E. paralias). It is distributed almost exclusively across coastal regions of South-west England and Wales (NBN Atlas 2017a), and was first recorded at Slapton Sands, in Devon, in August 2013. However, the storms of 2013-2014 ca...
Article
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For many species, the effects of landscape change can involve a time-lag and result in an extinction debt. The landscape matrix plays a vital role in supporting species populations. However, the importance of the historical composition and configuration of landscape mosaics has received little attention, with studies focusing on the effects of loss...
Article
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Context Landscape heterogeneity (the composition and configuration of different landcover types) plays a key role in shaping woodland bird assemblages in wooded-agricultural mosaics. Understanding how species respond to landscape factors could contribute to preventing further decline of woodland bird populations. Objective To investigate how woodla...
Article
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Species occurring at low density can be difficult to detect and if not properly accounted for, imperfect detection will lead to inaccurate estimates of occupancy. Understanding sources of variation in detection probability and how they can be managed is a key part of monitoring. We used sightings data of a low-density and elusive raptor (white-head...
Article
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The silverfish Ctenolepisma longicaudata Escherich 1905 is reported for the first time in Britain, from Whitley Wood, Reading, Berkshire (VC22). This addition increases the number of British species of the order Zygentoma from two to three, all in the family Lepismatidae.
Article
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The White-headed Vulture Trigonoceps occipitalis (WhV) is uncommon and largely restricted to protected areas across its range in sub-Saharan Africa. We used the World Database on Protected Areas to identify protected areas (PAs) likely to contain White-headed Vultures. Vulture occurrence on road transects in Southern, East, and West Africa was adju...
Data
Table S1. Number of White‐headed Vulture nests in selected protected areas in Southern Africa. Table S2. Number of White‐headed Vulture nests in selected protected areas in East Africa. Table S3. Number of White‐headed Vulture nests in selected protected areas in Central Africa. Table S4. Number of White‐headed Vulture nests in selected protecte...
Data
Appendix S1. Regional and country specific ratings for White‐headed Vulture nest densities.
Article
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The management of pheasants (Phasianus colchicus) in pens and their subsequent release within woodland for game shoots is widely practised in Britain. With the exception of ground flora and songbirds, the impacts on other taxa have not been well documented. We investigated the effects of pheasants on invertebrate abundance and community composition...
Conference Paper
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Landscape-scale conservation projects are increasingly in vogue, underpinned by the now well-established science of landscape ecology. Landscape schemes driven by insects understandably focus on species groups with high economic or cultural significance, such as pollinators or butterflies. However, few studies have sought to assess the potential im...
Article
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Context: Landscape heterogeneity (the composition and configuration of matrix habitats) plays a major role in shaping species communities in wooded-agricultural landscapes. However, few studies consider the influence of different types of semi-natural and linear habitats in the matrix, despite their known ecological value for biodiversity. Objecti...
Article
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Callosobruchus maculatus has for years remained a serious menace in cowpea in Sub-Sahara Africa. The objective of this study was to investigate the effect of genotypic cowpea (Vigna unguiculata (L.) Walp) varieties, time and dose on C. maculatus exposed to powders of Piper guineense and Eugenia aromatica. Irrespective of duration and botanicals, br...
Article
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An account of the discovery of a dermestid beetle new to Britain, Anthrenus angustefasciatus (Ganglebauer), is described. Three individuals were found on Oxeye daisy at Holme Green, Berkshire in May 2014. A brief description of the features separating A. angustefasciatus from A. pimpinellae (F.) is given. Morphological measurements of the specimens...
Article
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Information on the breeding biology of the White-headed Vulture Trigonoceps occipitalis is limited and published data are few. Within the Kruger National Park in north-east South Africa there is a regionally important population of about 60 White-headed Vulture pairs, of which 22 pairs were monitored for five years between 2008 and 2012 to determin...
Article
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Polyommatus bellargus is a priority species of butterfly in the UK as a result of its scarcity and the rate of population decline over the last few years. In the UK, the species is associated with chalk grassland on hot, south-facing slopes suitable for the growth of the food plant Hippocrepis comosa. Shooting game birds is a popular pastime in the...
Article
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Supplementary feeding of wild birds by domestic garden-holders is a globally widespread and popular form of human–wildlife interaction, particularly in urban areas. Vast amounts of energy are thus being added to garden ecosystems. However, the potential indirect effects of this activity on non-avian species have been little studied to date, with th...
Conference Paper
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Rice crops are globally important for food security, with over 90% of the world's rice produced in Asia. However, in many Asian rice growing areas, water shortages are a major constraint to rice production. To address this issue, management techniques have been developed to produce rice with less water. One such method is Alternate Wetting and Dryi...
Conference Paper
The climatic and geographic range of Asia provides ideal conditions for growing rice. With a growing demand for food security to feed an ever increasing human population, there is growing pressure to increase rice production. Within the Philippines, rice fields cover over 2.6 million ha and provide habitat for at least 50 species of waterbirds. Thu...
Article
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Bruchid beetles, Callosobruchus species, are serious pests of economically important grain legumes; their activity in stores is often controlled by the use of synthetic insecticides. Esterases are known to be involved in insecticide resistance in insects. However, there is a dearth of information on esterase activity in the genus Callosobruchus. In...
Article
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This study investigated the multifactorial interaction of various environmental factors including geographical strain (Brazil, Cameroon and Yemen strains), temperature, dose and larval food (cowpea and mungbean) on the response of Callosobruchus maculatus adult to insecticide. All the main factors, their two-way interactions and the four-way intera...
Article
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The impact of cowpea variety on the response of cowpea bruchid. Callosobruchus maculatus, to malathion was investigated. The interaction of six cowpea varieties (Adamawa Brown, Ife BPC, Ife Brown, Lilongwe, Ntcheu and NCRI-L25) with the geographical strains of C maculatus (Brazil and Cameroon), temperature (23, 25, 27 degrees C) and insecticide con...
Article
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Three bruchid pest species, Callosobruchus maculatus, Callosobruchus chinensis and Callosobruchus rhodesianus, were studied for their response to insecticide toxicity taking into account the separate and interactive effects of temperature and pre-adult food. The food types used were cowpea (Vigna unguiculata) and mungbean (Vigna radiata). Callosobr...
Conference Paper
Our earlier study revealed significant environmental impact on insecticide tolerance in cowpea bruchid, Callosobruchus maculatus. Environmental factors such as geographical origin of strains, exposure temperature, rearing food type and quantity of toxicant were studied. Further study replaced the food type by varieties of its most common host i.e....
Conference Paper
The insensitivity of Callosobruchus species to malaoxon inhibition was explored in order to explain the differences observed in the in vivo survival after treatment with malathion. Acetylcholinesterase activity of this genus was investigated in the absence and in the presence of malaoxon, using an in vitro microtitre-plate assay. Different species,...
Article
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The abdominal colour pattern of Eristalis arbustorum (L.) shows seasonal variation, with animals emerging in spring being darker than those emerging during summer. One of the most important environmental cues influencing the abdominal colour pattern is developmental temperature. An experiment was carried out to establish which period during the imm...
Article
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Data concerning habitat characteristics and general physiographic characteristics at 29 Short-toed Eagle Circaetus gallicus nest-sites (circular plot of 0.4 ha centred on the nest tree) were collected and compared with the same number of paired randomly selected plots in Dadia-Lefkimi-Soufli forest complex, northeast Greece. Short-toed Eagles used...