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The Humaneness of Rodent Pest Control

Published online by Cambridge University Press:  11 January 2023

G Mason  and
K E Littin
G Mason*
Affiliation:
Animal Behaviour Research Group, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK
K E Littin
Affiliation:
Animal Welfare Science and Bioethics Centre, Massey University, New Zealand
*
* Contact for correspondence and requests for reprints: Georgia.Mason@zoo.ox.ac.uk
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Abstract

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Rat and mouse control methods potentially affect the welfare of many millions of animals every year. Here, the humaneness of the methods used in the UK and the USA is assessed in terms of their speed and mode of action, the appearance and behaviour of affected animals, experiences of human victims, long-term effects on animals that survive exposure, and welfare risks to non-target animals. Several methods emerge as relatively humane: cyanide, alpha-chloralose, electrocution traps and well-designed snap traps all usually kill swiftly and with little distress. Preventative methods such as rodent-proofing are also humane, as well as an essential — and probably under-used — component of effective control. However, anticoagulant poisons, the most common means of controlling rodents, generally take several days to kill, during which time they cause distress, disability and/or pain. Sub-lethally affected animals are also likely to experience haemorrhages and their sequelae, and carnivores feeding on affected rodents may be secondarily poisoned. The acute rodenticides zinc phosphide and calciferol are also generally inhumane, the former typically causing severe pain for several hours, and the latter, pain and illness for several days. Sticky boards, to which rodents become adhered by the feet and fur until they are killed or simply eventually die, also raise very serious welfare concerns. This evidence highlights remarkable paradoxes in the way society treats different classes of animal, and argues for more education, legislation and research targeted at reducing the vast numbers of rodents currently killed inhumanely.

Keywords

animal welfarealpha-chloraloseanticoagulantscyanidehumane rodent pest controlsticky boardszinc phosphide
Type
Research Article
Information
Animal Welfare , Volume 12 , Issue 1 , February 2003 , pp. 1 - 37
Copyright
© 2003 Universities Federation for Animal Welfare

References

Agrizap 2000 Rat Zapper, http://www.ratzapper.comGoogle Scholar
Allen, D 1999 Rodents — least toxic control. Pesticides News 46: 20–21Google Scholar
Amjad, P, Muzaffar, A S, Shakkel, A and Waqar, A R S 1999 The significance of additives to enhance poison bait acceptance against rodents damaging paddy crops in Lower Sindh, Pakistan. Pakistan Journal of Zoology 31: 207–210Google Scholar
Anderson, J R 1980 Disturbances of blood flow and body fluids: shock. In: Anderson, J R (ed) Muir's Textbook of Pathology, Edn 17 pp 260–265. Edward Arnold: London, UKGoogle Scholar
Andersen, T S, Holm, J W and Andersen, TS 1996 Poisoning with aluminium phosphide as a poison against moles. Ugeskr-Laeger 158: 5308–5309 (in Danish, English abstract)Google ScholarPubMed
Anonymous 1993 Cyanide toxicity. Agency for toxic substances and disease registry. American Family Physician 48: 107–114Google Scholar
AVMA (American Veterinary Medical Association) 2000 Report of the AVMA Panel on Euthanasia. Journal of the American Veterinary Medical Association 218: 669–696Google Scholar
Bachmann, K J and Sullivan, T J 1983 Dispositional and pharmacodynamic characteristics of brodifacoum in warfarin-sensitive rats. Pharmacology 27: 281–288CrossRefGoogle ScholarPubMed
Bateson, P 1991 Assessment of pain in animals. Animal Behaviour 42: 827–839CrossRefGoogle Scholar
Berny, P J, Buronfosse, T, Buronfosse, F, Lamarque, F and Lorgue, G 1997 Field evidence of secondary poisoning of foxes (Vulpes vulpes) and buzzards (Buteo buteo) by bromadiolone, a 4-year survey. Chemosphere 35: 1817–1829CrossRefGoogle ScholarPubMed
Bonsall, J L 1984 Survival without sequelae following exposure to 500 mg/m3 of hydrogen cyanide. Human Toxicology 3: 57–60CrossRefGoogle ScholarPubMed
Brennan, S 2001 He won't feel a thing. The Times, August 25: 10Google Scholar
Bright, P W and Morris, P A 1994 Animal translocation for conservation — performance of dormice in relation to release methods, origin and season. Journal of Applied Ecology 31: 699–708CrossRefGoogle Scholar
Broom, D M 1999 The welfare of vertebrate pests in relation to their management. In: Cowan, P D and Feare, C J (eds) Advances in Vertebrate Pest Management pp 309–329. Filander Verlag: Furth, GermanyGoogle Scholar
Brown, V K 1980 Acute Toxicity in Theory and Practice, with Special Reference to the Toxicology of Pesticides. John Wiley & Sons: Chichester, UKGoogle Scholar
Brown, P R and Singleton, G R 1998 Efficacy of brodifacoum to control house mice, Mus domesticus, in wheat crops in southern Australia. Crop Protection 17: 345–352CrossRefGoogle Scholar
Brunton, C F A, Macdonald, D W and Buckle, A P 1993 Behavioural resistance towards poison baits in brown rats, Rattus norvegicus. Applied Animal Behaviour Science 38: 159–174CrossRefGoogle Scholar
Budavari, S, O'Neil, M J, Smith, A, Heckelman, P E and Kinneary, J F (eds) 1996 Sulphur dioxide. In: The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, Edn 12 p 1231. Merck: New Jersey, USAGoogle Scholar
Bugspray 2002 Zappers, http://www.bugspray.com/catalogue/products/page710.htmlGoogle Scholar
Burdett-Smith, P 1997 Stun gun emergency. Journal of Accident and Emergency Medicine 14: 402–404CrossRefGoogle Scholar
Burns, R, Harrison, A, Hudson, J, Jones, G, Rudolf, P, Shaw, P, Ward, C, Wilson, D and Wilson, L 2000 Northern Te Urewera Ecosystem Restoration Project, Summary Annual Report, July 1999-June 2000. East Coast Hawkes Bay Conservancy: Gisborne, New ZealandGoogle Scholar
Carter, I and Burn, A 2000 Problems with rodenticides: the threat to red kites and other wildlife. British Wildlife, February 2000: 192–197Google Scholar
Carter, I and Grice, P 2000 Studies of re-established red kites in England. British Birds 93: 304–322Google Scholar
Chambers, L K, Lawson, M A and Hinds, L A 1999 Biological control of rodents — the case for fertility control using immunocontraception. In: Singleton, G R, Hinds, L A, Leirs, H and Zhang, Z (eds) Ecologically Based Rodent Management pp 215–242. Australian Centre for International Agricultural Research: Canberra, AustraliaGoogle Scholar
Chua, J D and Friedenberg, W R 1998 Superwarfarin poisoning. Archives of Internal Medicine 158: 1929–1932CrossRefGoogle ScholarPubMed
Chugh, S N, Avora, V, Sarma, A and Chugh, K 1996 Free radical scavengers and lipid peroxidation in acute aluminium phosphide poisoning. Indian Journal of Medical Research 104: 190–193Google ScholarPubMed
Chugh, S N, Aggarwal, H K and Mahajan, S K 1998 Zinc phosphide intoxication symptoms: analysis of 20 cases. International Journal of Clinical Pharmacological Therapy 36: 406–407Google ScholarPubMed
Chugh, S N, Ram, S, Arora, B B and Malhotra, K C 1989 Adult respiratory distress syndrome following aluminium phosphide ingestion: report of 4 cases. Journal of the Association of Physicians India 37: 271–272Google ScholarPubMed
Clarke, E G C and Clarke, H L 1967 Factors affecting the action of poisons. In: Garner, R J, Clarke, H L and Clarke, E G C (eds) Veterinary Toxicology, Edn 3 pp 15–20. Balliere, Tindall & Cassell: London, UKGoogle Scholar
Cleminson, N H 1969 The control of wild animal population by trapping and snaring. In: The Humane Control of Animals Living in the Wild, UFAW Symposium, 23 Jan 1969 pp 17–20. UFAW: Wheathampstead, Hertfordshire, UKGoogle Scholar
Close B, Banister K, Baumans V, Bernoth E-M, Bromage N, Bunyan J, Erhardt W, Flecknall P, Gregory N, Hackbarth H, Morton D and Warwick 1996 Recommendation for euthanasia of experimental animals: Part 1. Laboratory Animals 30: 293–316CrossRefGoogle Scholar
Cooper, J, Mason, G and Raj, M 1998 Determination of the aversion of farmed mink (Mustela vison) to carbon dioxide. Veterinary Record 143: 359–361CrossRefGoogle ScholarPubMed
Corke, P J 1997 Superwarfarin (brodifacoum) poisoning. Anaesthesia and Intensive Care 25: 707–709Google ScholarPubMed
Corrigan, B 1995 The significance of commensal rodents.Google Scholar
http://www.pctonline.com/articles/article.asp?ID=665&CatID=8&SubCatID=20/Google Scholar
Corrigan, B 1997a Vertebrate pests.Google Scholar
http://www.pctonline.com/articles/article.asp?ID=258&CatID=8&SubCatID=20/Google Scholar
Corrigan, B 1997b Trapped!Google Scholar
http://www.pctonline.com/articles/article.asp?Id+532&SubcatID=2&CatID=8Google Scholar
Corrigan, B 1998a Snap trap baiting strategies.Google Scholar
http://www.pctonline.com/articles/article.asp?Id=138&SubeatID=12&CatID=3Google Scholar
Corrigan, B 1998b Exterior rodent trapping programmes.Google Scholar
http://www.pctonline.com/articles/article.asp?Id=122&SubcatID=12&CatID=3Google Scholar
Cox, P R and Smith, R H 1992 Rodenticide ecotoxicology: pre-lethal effects of anticoagulants on rat behaviour. In: Borrecco, J E and Marsh, R E (eds) Proceedings of the 15 th Vertebrate Pest Conference pp 165–170. University of California: Davis, USAGoogle Scholar
Danneman, P J, Stein, S and Walshaw, S O 1997 Humane and practical implications of using carbon dioxide mixed with oxygen for anesthesia or euthanasia of rats. Laboratory Animal Science 47: 376–385Google ScholarPubMed
DellPest 2001 Rodent Control.Google Scholar
http://www.Galaxymall.com/services/pestcontrol/rodent.htmlGoogle Scholar
Denver Wildlife Research Center 1995 Highlights Report Fiscal Year 1995. USD A Miscellaneous Publication No. 1533. Denver Wildlife Research Center: Denver, USA; http://www.aphis.usda.gov/ws/nwrc/95hilite.htmGoogle Scholar
Desheesh, M A T 1983 Effects of anticoagulant poison-baits on the behaviour of white rats Rattus norvegicus. Alexandria Science Exchange 4: 49–56Google Scholar
Dix, G I, Jolly, S E, Button, L S and Gardiner, A I 1994 The potential of electric shock for the humane trapping of brushtail possums, Trichosurus vulpecula. Wildlife Research 21: 49–52CrossRefGoogle Scholar
Drazen, J M, Takebayashi, T, Long, N C, de Sanctis, G T and Shore, SA 1999 Animal models of asthma and chronic bronchitis. Clinical and Experimental Allergy Supplement 2: 37–47CrossRefGoogle Scholar
Drickamer, L C and Mikesic, D G 1993 Differences in trapping and killing efficiency of Sherman, Victor and Museum Special traps for house mice. American Midland Naturalist 130: 397–401CrossRefGoogle Scholar
Du Vall, M D, Murphy, M J, Ray, A C and Reagor, J C 1989 Case studies on second generation anticoagulant rodenticide toxicities in nontarget species. Journal of Veterinary Diagnosis and Investigation 1: 6–68Google ScholarPubMed
Eason, C T 1993 The acute toxicity of cholecalciferol to the European rabbit, Oryctolagus cuniculus. Wildlife Research 20: 173–176CrossRefGoogle Scholar
Eason, C T and Spurr, E B 1995 Review of the toxicity and impacts of brodifacoum on non-target wildlife in New Zealand. New Zealand Journal of Zoology 22: 371–379CrossRefGoogle Scholar
Eason, C T and Wickstrom, M 2001 Vertebrate Pesticide Toxicology Manual (Poisons): Information on Poisons used as Vertebrate Pesticides, Edn 2. Department of Conservation: Wellington, New ZealandGoogle Scholar
Eason, C T, Wright, G R and Batcheler, D 1996a Anticoagulant effects and the persistence of brodifacoum in possums, Trichosurus vulpecula. New Zealand Journal of Agriculture 39: 397–400CrossRefGoogle Scholar
Eason, C T, Wright, G R, Meikle, L and Elder, P 1996b The persistence and secondary poisoning risks of sodium monofluoroacetate (1080), brodifacoum, and cholecalciferol in possums. In: Timm, R M and Crabb, A C (eds) Proceedings of the 17th Vertebrate Pest Conference pp 54–58. University of California: Davis, USAGoogle Scholar
Eason, C T, Wickstrom, M and Gregory, N 1997 Product stewardship, animal welfare and regulatory toxicity constraints on vertebrate pesticides. Proceedings of the 50th Plant Protection Conference pp 206-213. http://www.hortnet.co.nz/publications/nzpps/proceeds.htmCrossRefGoogle Scholar
FAO 1999 Post-harvest Operations Compendium, http://www.fao.org/inpho/compend/allintro.htm. Food and Agricultural Organization of the United Nations: Rome, ItalyGoogle Scholar
FELASA (Federation of European Laboratory Animal Science Associations Working Group) 1994 Pain and distress in laboratory rodents and lagomorphs. Laboratory Animals 28: 97–112CrossRefGoogle Scholar
Federal Trade Commission 2001 FTC warns manufacturers and retailers of ultrasonic pest-control devices. For Your Information, May 3 2001. Federal Trade Commission: Washington, USA; http://www.ftc.gov/opa/2001/05/fyi0128.htmGoogle Scholar
Feral Control 2000 Vertebrate pest control technologies, http://www.feralcontrol.co.nz/Google Scholar
Fish, R M and Geddes, L A 2001 Effects of stun guns and tasers. The Lancet 358: 687–688CrossRefGoogle ScholarPubMed
Fooshee, S K and Forrester, S D 1990 Hypercalcemia secondary to cholecalciferol rodenticide toxicosis in dogs. Journal of the American Veterinary Association 196: 1265–1268Google Scholar
Forage Information System 1997 Vertebrate Pests.Google Scholar
http://web.css.orst.edu/Topics/Pests/Vertebrate/index.htmlGoogle Scholar
Fox, N and Macdonald, H 1999 Welfare Aspects of Killing Wild Animals in Britain, Edn 2. The Hawk Board: Carmarthen, WalesGoogle Scholar
Frantz, S C and Padula, C M 1983 A laboratory test method for evaluating the efficacy of glueboards for trapping house mice. In: Kaukeined, D E (ed) Vertebrate Pest Control and Management Materials, Fourth Symposium pp 209–225. ASTM STP 817. American Society for Testing and Materials: Philadelphia, USACrossRefGoogle Scholar
Gao, Y and Short, R V 1994 Fertility control in laboratory rats and mice after feeding with the antigestagen RU486. Journal of Reproduction and Fertility 101: 477–481CrossRefGoogle ScholarPubMed
Galaxymall 2001 Rodent control, www.galaxymall.com/services/pestcontrol/rodent.htmlGoogle Scholar
Garry, V F, Good, P F, Manivel, J C and Perl, D P 1993 Investigation of a fatality from non-occupational aluminium phosphide exposure: measurement of aluminium in tissue and body fluids as a marker of exposure. Journal of Clinical Laboratory Medicine 122: 739–747Google Scholar
Gilkeson, L A and Adams, R W (eds) 1996 Integrated Pest Management Manual for Structural Pests in British Columbia. Ministry of Water, Land and Air Protection: Victoria, British Columbia, Canada; http://wlapww.gov.bc.ca/epd/ipm/docs/tablecont.htmlGoogle Scholar
Gill, E J, Kerins, M G, Langton, S D and Macnicoll, A D 1994 Blood-clotting response test for brodifacoum resistance in Norway rats. Journal of Wildlife Management 58: 454–461CrossRefGoogle Scholar
Gillies, C A and Pierce, R J 1999 Secondary poisoning of mammalian predators during possum and rodent control operations at Trounsen Kauri Park, Northland, New Zealand. New Zealand Journal of Ecology 23: 183–192Google Scholar
Gray, A, Eadsforth, C V, Dutton, A J and Vaughan, J A 1994 The toxicity of three second-generation rodenticides to barn owls. Pesticide Science 42: 179–184CrossRefGoogle Scholar
Gregory, N G 1998 Physiological mechanisms causing sickness behaviour and suffering in diseased animals. Animal Welfare 7: 293–305Google Scholar
Gregory, N G, Milne, L M, Rhodes, A T, Littin, K E, Wickstrom, M and Eason, CT 1998 Effect of potassium cyanide on behaviour and time to death in possums. New Zealand Veterinary Journal 46: 6064CrossRefGoogle ScholarPubMed
Guale, F G, Stair, E L, Johnson, B W, Edwards, W C and Haliburton, J C 1994 Laboratory diagnosis of zinc phosphide poisoning. Veterinary and Human Toxicology 36: 517–519Google ScholarPubMed
Gunther, R, Felice, L J, Nelson, R K and Franson, A M 1988 Toxicity of Vitamin D3 rodenticide to dogs. Journal of the American Veterinary Association 193: 757Google ScholarPubMed
Gupta, M S, Malik, A and Sharma, V K 1995 Cardiovascular manifestations in aluminium phosphide poisoning with special reference to echocardiographic changes. Journal of the Association of Physicians of India 43: 773–774, 779–780Google ScholarPubMed
Hackbarth, H, Küppers, N and Bohnet, W 2000 Euthanasia of rats with carbon dioxide — animal welfare aspects. Laboratory Animals 34: 91–96CrossRefGoogle ScholarPubMed
Harrington, D D and Page, E H 1983 Acute vitamin D3 toxicosis in horses: case reports and experimental studies of the comparative toxicity of vitamins D2 and D3. Journal of the American Veterinary Association 182: 1358–1369Google ScholarPubMed
Harris, T 2001 How stun guns work, http://www.howstuffworks.com/stun-gun2.htmGoogle Scholar
Hatch, R C and Laflamme, D P 1989 Acute intraperitoneal cholecalciferol (vitamin D3) toxicosis in mice: its nature and treatment with diverse substances. Veterinary and Human Toxicology 31: 105–112Google ScholarPubMed
Helst 2002 Rat and mouse zapper, http://www.thezapper.co.uk/zapper.htmlGoogle Scholar
Holzgrefe, H H, Everitt, J M and Wright, E M 1987 Alpha-chloralose as a canine anaesthetic. Laboratory Animal Science 37: 587–595Google Scholar
Horskins, K and Wilson, J 1999 Cost-effectiveness of habitat manipulation as a method of rodent control in Australian macadamia orchards. Crop Protection 18: 379–387CrossRefGoogle Scholar
Howard, A 1996 Eliminating rats and mice. Western Horseman, November 1996 http://www.ratzapper.com/articles/l196_western_horseman.htmGoogle Scholar
HSA (Humane Slaughter Association) 2000a Electrical Stunning of Red Meat Animals: Guidance Notes No. 4. Humane Slaughter Association: Wheathampstead, Hertfordshire, UKGoogle Scholar
HSA (Humane Slaughter Association) 2000b Poultry Slaughter — A Fowl End? Humane Slaughter Association: Wheathampstead, Hertfordshire, UKGoogle Scholar
HSUS (Humane Society of the United States) 2002 Carbon Dioxide for Euthanasia and Anesthesia: Concerns Regarding Pain and Distress. HSUS: Washington, USA http://www.hsus.org/web-files/PDF/ARIS_Carbon_Dioxide_For_Euthanasia_And_Anaesthesia_pdfGoogle Scholar
Hughes, J 1998 Pest Control Programmes. American Institute of Baking: Manhattan, Kansas, USAGoogle Scholar
Hyngstrom, S and Virchow, D R 1996 Controlling Rats — Nebguide G92-1106-A. University Of Nebraska: Lincoln, Nebraska, USA; http://ianr.unl.edu/pubs/wildlife/G110g.htmGoogle Scholar
Ikeda, N, Harada, A and Suzuki, T 1992 Homicidal manual strangulation and multiple stun-gun injuries. American Journal of Forensic Medicine and Pathology 13: 320–323CrossRefGoogle ScholarPubMed
Inoue, N 1993 Extra-pyramidal syndrome induced by chemical substances. Nippon Rinsho 51: 2924–2928 (in Japanese, English abstract)Google Scholar
IRRI (International Rice Research Institute) 2001 Rice Science for a Better World, http://www.irri.org/Google Scholar
Islam, Z and Karim, A N M R 1995 Rat control by trapping in deepwater rice. International Journal of Pest Management 41: 229–233CrossRefGoogle Scholar
Johnson, R A and Prescott, C V 1994 The laboratory evaluation of rodenticides. In: Buckle, A P and Smith, R H (eds) Rodent Pests and their Control pp 161–179. CAB International: Wallingford, UKGoogle Scholar
Jolly, S E, Eason, C T, and Frampton, C 1993 Serum calcium levels in response to cholecalciferol and calcium carbonate in the Australian brushtail possum. Pesticide Biochemistry and Physiology 47: 159164CrossRefGoogle Scholar
Jolly, S E, Henderson, R J, Frampton, C and Eason, C T 1995 Cholecalciferol toxicity and its enhancement by calcium carbonate in the common brushtail possum. Wildlife Research 22: 579–583CrossRefGoogle Scholar
Kanthasamy, A G, Borowitz, J L, Pavlakovic, G and Isom, G E 1994 Dopaminergic toxicity of cyanide: neurochemical, histological and behavioral characterisation. Toxicology and Applied Pharmacology 126: 156–163CrossRefGoogle Scholar
Kaukeinen, D E, Spragins, C W, Hobson, J F and Arcadis, J F 2000 Risk-benefit considerations in evaluating commensal anticoagulant rodenticide impacts to wildlife. In: Salmon, T P and Crabb, A C (eds) Proceedings of the 19th Vertebrate Pest Control Conference pp 245–256. University of California: Davis, USAGoogle Scholar
Kay, B J, Twigg, L E, Korn, T J and Nicol, H I 1994 The use of artificial perches to increase predation on house mice (Mus domesticus) by raptors. Wildlife Research 21: 95–106CrossRefGoogle Scholar
Kemble, E D and Bohlwahnn, B L 1996 Immediate and long-term effects of novel odors on risk assessment in mice. Physiology & Behavior 61: 543–549CrossRefGoogle Scholar
Kenward, R E and Hodder, K H 1998 Red squirrel (Sciurus vulgaris) released in conifer woodland: the effects of source habitat, predation and interactions with great squirrels (Sciurus carolinensis). Journal of Zoology 244: 23–32CrossRefGoogle Scholar
Killgerm Chemicals Ltd 1994 Difenacoum Safety Data Sheet. Killgerm Chemicals Ltd: Ossett, UKGoogle Scholar
Killgerm 2000 Notes on rodent control, http://www.killgerm.comGoogle Scholar
Killgerm 2001 Products, http://www.killgerm.comGoogle Scholar
Kintz, P, Doray, S, Cirimele, V and Ludes, B 1999 Testing for alpha-chloralose by headspace GCMS: a case report. Forensic Science International 104: 59–63Google ScholarPubMed
Kirkwood, J K, Sainsbury, A W and Bennett, P M 1994 The welfare of free-living wild animals: methods of assessment. Animal Welfare 3: 257–273Google Scholar
Koehler, A E, Tobin, M E, Goodall, M J and Sugihara, R T 1995 Weatherability and acceptance of selected commercial zinc phosphide rodent baits. International Biodeterioration and Biodegradation 36: 35–50CrossRefGoogle Scholar
Kornblum, R N and Reddy, S K 1991 Effects of the taser in fatalities involving police confrontation. Journal of Forensic Sciences 36: 434–448CrossRefGoogle ScholarPubMed
Krishna, L and Katoch, R C 1989 Investigation of mysterious ‘disease’ in livestock: hydrocyanic acid poisoning. Veterinary and Human Toxicology 31: 566–567Google ScholarPubMed
Kruse, J A and Carlson, R W 1992 Fatal rodenticide poisoning with brodifacoum. Annals of Emergency Medicine 21: 331–336CrossRefGoogle ScholarPubMed
Kumar, P, Pasahan, S C, Sabhlok, V P and Singal, R K 1997 Efficacy and economics of rodenticides for rodent management in watermelon (Citrullus lanatus) fields. Indian Journal of Agricultural Sciences 11: 528–530Google Scholar
Lam, K K and Lau, F L 2000 An incident of hydrogen cyanide poisoning. American Journal of Emergency Medicine 18: 172–175CrossRefGoogle ScholarPubMed
Lambropoulos, A S, Fine, J B, Perbeck, A, Torres, D, Glass, G E, McHugh, P and Dorsey, E A 1999 Rodent control in urban areas — an interdisciplinary approach. Journal of Environmental Health 61: 12–17Google Scholar
Leach, M C, Bowell, V A, Morton, D B and Allen, T F 2001 Aversion to inhalation anaesthesia and euthanasia in laboratory rodents. In: Garner, J P, Mench, J A and Heekin, S P (eds) Proceedings of the 35th International Congress of the International Society for Applied Ethology. Center for Animal Welfare: Davis, USAGoogle Scholar
Letty, J, Marchandeau, S, Clobert, J and Aubineau, J 2000 Improving animal translocation success: an experimental study of anti-stress treatment and release method for wild rabbits. Animal Conservation 3: 211–219CrossRefGoogle Scholar
Littin, K E and O'Connor, C E 2000 The development of a welfare checksheet for captive possums. In: Ramus A, Pinheiro Machado Filho L C and Hötzel M J (eds) Proceedings of the 34th International Congress of The International Society for Applied Ethology p 159. Federal University of Santa Catarina: Florianopolis, BrazilGoogle Scholar
Littin, K E, O'Connor, C E and Eason, C T 2000 Comparative effects of brodifacoum on rats and possums. New Zealand Plant Protection 53: 310–315CrossRefGoogle Scholar
Littin, K E, O'Connor, C E, Gregory, N G, Mellor, D J and Eason, C T 2002 Behaviour, coagulopathy and pathology of brushtail possums (Trichosurus vulpecula) poisoned with brodifacoum. Wildlife Research 29: 259–267CrossRefGoogle Scholar
Lu, K H, Lee, L H, Young, S K, Lin, T S, Hou, S K, Hung, J T, Kuo, C M and Lin, W C 1994 The strategy for improving efficacy of rodent control in public fields: using sustainable bait. Plant Protection Bulletin Taichung 36: 209–223 (in Chinese, English abstract)Google Scholar
Lucke, J N 1979 Euthanasia in small animals. The Veterinary Record 104: 316–318CrossRefGoogle ScholarPubMed
Macdonald, D W, Mathews, F and Berdoy, M 1999 The behaviour and ecology of Rattus norwegicus: from opportunism to Kamikaze tendencies. In: Singleton, G R, Hinds, L A, Leirs, H and Zhang, Z (eds) Ecologically Based Rodent Management pp 49–80. Australian Centre for International Agricultural Research: Canberra, AustraliaGoogle Scholar
Macon, W L, Morton, J H and Adams, J T 1970 Significant complications of anticoagulant therapy. Surgery 68: 571–582Google Scholar
MAFF (Ministry for Agriculture, Fisheries and Food) 1996 Code of Practice for the Prevention of Rodent Infestations in Poultry Flocks. MAFF Publications: London, UKGoogle Scholar
Malhi, C S, Parshad, V R and Ahmad, N 1994 Determination of potential of barium carbonate for the control of house rat, Rattus rattus. Zeitschrift für Angewandte Zoologie 80: 43–49Google Scholar
Mallinckrodt Baker Inc 2000 Material Safety Data Sheet: Alpha-Chloralose. J T Baker: Phillipsburg, NJ, USA; http://www.jtbaker.com/msds/C2156.htmGoogle Scholar
Manzo, L, Richelmi, P and Crema, A 1979 Electrocerebral changes in alpha-chloralose poisoning. Veterinary and Human Toxicology 21: 245–247Google ScholarPubMed
Marks, C A 1996 Research directions for humane burrow fumigation and 1080 predator baiting. In: Fisher, P M and Marks, C A (eds) Humaneness and Vertebrate Pest Control: Proceedings of Seminar held 27 March 1996, Victoria, Australia pp 50–57. Department of National Resources and Environment: Victoria, AustraliaGoogle Scholar
Marks, C A, Hackman, C, Busana, F and Gigliotti, F 2000 Assuring that 1080 toxicosis in the red fox (Vulpes vulpes) is humane: fluoroacetic acid (1080) and drug combinations. Wildlife Research 27: 483–494CrossRefGoogle Scholar
Martin, G R, Kirkpatrick, W E, King, D R, Robertson, I D, Hood, P J and Sutherland, JR 1994 Assessment of the potential toxicity of an anticoagulant, pindone (2-pivalyl-l,3-indandione), to some Australian birds. Wildlife Research 21: 85–93CrossRefGoogle Scholar
Mason, G 2001 Animal welfare. In: Bateson, P and Alleva, E (eds) Frontiers of Life, Volume IV, Part 1 pp 29–43. Academic Press: San Diego, USAGoogle Scholar
Mason, G J and Mendl, M T 1993 Why is there no simple way of measuring animal welfare? Animal Welfare 2: 301–320Google Scholar
Mathur, R P 1997 Effectiveness of various rodent control measures in cereal crops and plantations in India. Belgian Journal of Zoology 127: 137–144Google Scholar
McDonald, R A and Harris, S 2000 The use of fumigants and anticoagulant rodenticides on game estates in Great Britain. Mammal Review 31: 57–64Google Scholar
McKenzie, J E, Scandling, D M, Ahle, N W, Bryant, H J, Kyle, R R and Abbrecht, P H 1996 Effects of soman (pinacolyl methylphosphonofluoridate) on coronary blood flow and cardiac function in swine. Fundamental and Applied Toxicology 29: 140–146CrossRefGoogle ScholarPubMed
Meehan, A P 1984 Rats and Mice — Their Biology and Control. The Rentokil Library: East Grinstead, UKGoogle Scholar
Meyer, A 2000 A Code of Practice for the Safe and Effective use of Brodifacoum on Farms. The Acheta Partnership: Newbury, UKGoogle Scholar
Miller, R R, Aynes, J A, Jersey, G C and McKenna, M J 1981 Inhalation toxicity of acrylic acid. Fundamental and Applied Toxicology 1: 271–277CrossRefGoogle ScholarPubMed
Misra, U K, Tripathi, A K, Pandey, R and Bhargwa, B 1988 Acute phosphine poisoning following ingestion of aluminium phosphide. Human Toxicology 7: 343–345CrossRefGoogle ScholarPubMed
Moore, F M, Kudisch, M, Richter, K and Faggella, A 1988 Hypercalcaemia associated with rodenticide in three cats. Journal of the American Veterinary Association 193: 1099–1100Google ScholarPubMed
Morgan, B W, Tomaszewski, C and Rotker, I 1996 Spontaneous hemoperitoneum from brodifacoum overdose. American Journal of Emergency Medicine 14: 656–659CrossRefGoogle ScholarPubMed
Morriss, G A, Warburton, B and Ruscoe, W A 2000 Comparison of the capture efficacy of a kill-trap set for brushtail possums that excludes ground-birds, and ground-set leg-hold traps. New Zealand Journal of Zoology 27: 201–206CrossRefGoogle Scholar
Nagler, J, Provost, R A and Parizel, G 1978 Hydrogen cyanide poisoning: treatment with cobalt EDTA. Journal of Occupational Medicine 20: 414–416Google ScholarPubMed
Natrocell 2001a Frequently asked questions, http://www.natrocell.com. Natrocell Technologies Limited: London, UKGoogle Scholar
Natrocell 2001b Rochex TM. http://www.natrocell.com/text_rochex.html. Natrocell Technologies Limited: London, UKGoogle Scholar
Network Pest Control Systems Ltd 2001 Mammal proofing and control equipment. http://www.network-pest.co.ukGoogle Scholar
Newton, I, Wylie, I and Freestone, P 1990 Rodenticides in British bam owls. Environmental Pollution 68: 101–117Google Scholar
Nutman, A W, Gregory, N G and Warburton, B 1998 A comparison of the effectiveness of three neck-hold killing traps in occluding carotid arteries in the neck of the brushtail possum. New Zealand Veterinary Journal 46: 177–181CrossRefGoogle ScholarPubMed
O'Connor, C E, Milne, L, Rhodes, A, Gregory, N and Eason, C 1998 Ethical approaches to vertebrate pest control in New Zealand. In: Proceedings of the 32nd International Congress of the International Society for Applied Ethology p 94. Federal University of Santa Catarina: Florianopolis, BrazilGoogle Scholar
Ordog, G J, Wasserberger, J, Schlater, T and Balasubramanium, S 1987 Electronic gun (Taser) injuries. Annals of Emergency Medicine 16: 73–78CrossRefGoogle ScholarPubMed
Osweiler, G D, Carson, T L, Buck, W B and van Gelder, G A 1985 Toxic gases: sulfur oxides. In: Clinical and Diagnostic Veterinary Toxicology pp 376-377. Kendall Hunt: Dubuque, USGoogle Scholar
Padgett, S L, Stokes, J E, Tucker, R L and Wheaton, L G 1998 Hematoma secondary to anticoagulant rodenticide toxicity. Journal of the American Animal Hospital Association 34: 437–439CrossRefGoogle ScholarPubMed
Palmer, R B, Alakija, P, de Baca, J E and Nolte, K B 1999 Fatal brodifacoum rodenticide poisoning: autopsy and toxicological findings. Journal of Forensic Science 44: 851–855CrossRefGoogle Scholar
Parmar, G, Bratt, H, Moore, R and Batten, P L 1987 Evidence for a common binding site in vivo for the retention of anticoagulants in rat liver. Human Toxicology 6: 431–432Google Scholar
Paterson, CR 1981 Hypercalcaemia in alphacalcidol therapy. Postgraduate Medical Journal 57: 431–432CrossRefGoogle ScholarPubMed
Pathak, A and Saxena, Y 1997 Rodent control in houses and fields with zinc phosphide followed by bromadiolone baiting. National Academy of Science Letters India 20: 19–21Google Scholar
Pest Control Direct 2001 Eradirat and Eradimouse.Google Scholar
http://www.pestcontroldirect.co.uk/Pest_Control_Direct_ERADIRAT_ERADIMOUSE_30.htmlGoogle Scholar
Pest Control Portal 2001 Alphachloralose (chem.) Glucochloral. http://www.pestcontrolportal.com/Google Scholar
Potter, M 1994 Control of mice. Cooperative Extension Service, University of Kentucky: Kentucky, USA http://uky.edu/Agriculture/Entomology/entfacts/struct/ef617.htmGoogle ScholarPubMed
Proctor, D L 1994 Grain Storage Techniques. FAO Agricultural Services Bulletin No. 109. Food and Agriculture Organization of the United Nations: Rome, Italy http://www.fao.org/docrep/Tl838E/T1838E00.htm ContentsGoogle Scholar
Proulx, G and Barrett, M W 1991 Evaluation of the ‘bionic’ trap to quickly kill mink (Mustela vison) in simulated natural environments. Journal of Wildlife Diseases 27: 276–280CrossRefGoogle ScholarPubMed
PSD (Pesticide Safety Directorate) 1997 Assessment of Humaneness of Vertebrate Control Agents — Evaluation of Fully Approved or Provisionally Approved Products, No. 171 (December 1997). Pesticides Safety Directorate: York, UKGoogle Scholar
Purser, D A, Grimshaw, P and Berrill, K R 1984 Intoxication by cyanide in fires: a study in monkeys using polyacrylonitrile. Archives of Environmental Health 39: 394–400CrossRefGoogle ScholarPubMed
Quy, R J, Shepherd, D S and Inglis, I R 1992 Bait avoidance and effectiveness of anticoagulant rodenticides against warfarin- and difenacoum-resistant populations of Norway Rats Rattus Norvegicus. Crop Protection 11: 14–20CrossRefGoogle Scholar
Radostits, O M, Gay, C C, Blood, D C and Hinchcliff, K W 1999 Diseases of the blood and blood-forming organs. In: Veterinary Medicine: A Textbook of the Diseases of Cattle Sheep Pigs Goats and Horses, Edn 9 pp 399–411. W B Saunders: London, UKGoogle Scholar
Raj, M and Gregory, N G 1995a Welfare implications of gas-stunning pigs. 1: Determination of the aversion to the initial inhalation of carbon dioxide or argon. Animal Welfare 4: 273–280Google Scholar
Raj, M and Gregory, N G 1995b Welfare implications of gas-stunning pigs. 2: Stress of induction of anaesthesia. Animal Welfare 5: 71–78Google Scholar
Raj, M and Mason, G 1999 Reaction of farmed mink (Mustela vison) to argon-induced hypoxia. Veterinary Record 145: 736–737CrossRefGoogle ScholarPubMed
Raj, ABM, Johnson, S P, Wotton, S B and Mcinstry, J L 1997 Welfare implications of gas stunning pigs. 3: The time to loss of somatosensory evoked potentials and spontaneous electrocorticogram of pigs during exposure to gases. Veterinary Journal 153: 329–339CrossRefGoogle ScholarPubMed
Ramsey, DSL and Wilson, J C 2000 Towards ecologically-based baiting strategies for rodents in agricultural systems. International Biodeterioration and Biodegradation 45: 183–197CrossRefGoogle Scholar
Randall, C 1999 (ed) Vertebrate Pest Management — A Guide for Commercial Applicators Category 7D. Extension Bulletin E-2050. Michigan State University: East Lansing, USA http://www.pested.msu.edu/BulletinsSlideSetsNewsletters/bulletins/pdf72050/E2050_Chapl.pdfGoogle Scholar
Rentokil 2001 Pest control. http://www.Rentokil-initial.com/rnd/pestcontrolGoogle Scholar
Reuters 2000 Bounty hunters kill Hanoi mice. The Guardian, September 26 http://www.guardian,co.uk/international/story/Google Scholar
Robben, J H, Mout, H C A and Kuijpers, EAP 1997 Anticoagulant rodenticide poisoning in dogs in the Netherlands. Tijdschrift Voor Diergeneeskunde 122: 466–471 (in Dutch, English abstract)Google ScholarPubMed
Rodenberg, H D, Chang, C C and Watson, W A 1989 Zinc phosphide ingestion: a case report and review. Veterinary and Human Toxicology 31: 559–562Google ScholarPubMed
Rowsell, H C, Ritcey, J and Cox, F 1979 Assessment of humaneness of vertebrate pesticides. In: Proceedings of the Canadian Association for Laboratory Animal Science 1978-1979 pp 159–249. CALAS: Calgary, CanadaGoogle Scholar
RSPCA (Royal Society for the Prevention of Cruelty to Animals) 1997 Policies on Animal Welfare. RSPCA: Horsham, UKGoogle Scholar
Rumbeiha, W K, Kruger, J M, Fitzgerald, S F, Nachreiner, R F, Kaneene, J B, Braselton, W E and Chiapuzio, C L 1999 Use of Pamidronate to reverse vitamin D3-induced toxicosis in dogs. American Journal of Veterinary Research 60: 1092–1097Google ScholarPubMed
Rushen, J 1986 Aversion of sheep to electro-immobilisation and physical restraint. Applied Animal Behaviour Science 15: 315–324CrossRefGoogle Scholar
Saini, M S and Parshad, V R 1992 Control of Rattus rattus with cholecalciferol: laboratory acceptance of freshly prepared and ready-to-use bait formulations. International Biodeterioration and Biodegradation 30: 87–96CrossRefGoogle Scholar
Saini, M S and Parshad, V R 1993 Field evaluation of alpha-chlorohydrin against the Indian mole rat: studies on toxic and antifertility effects. Annals of Applied Biology 122: 153–160CrossRefGoogle Scholar
Saskatchewan Agriculture and Food 1998 Rat Control in Saskatchewan. Saskatchewan Government, Canada; http://www.agr.gov.sk.ca/DOCS/crops/integrated_pest_management/rat_control/rat_control.htmGoogle Scholar
Scheitel, J, Setzer, S, Walser, M, Pertile, T, Hegstad, R L, Felice, L J and Murphy, M J 1991 Elevated 25- hydroxy- and normal 1,25-dihydroxy-cholecalciferol serum concentrations in a successfully treated case of vitamin D3 toxicosis in a dog. Veterinary and Human Toxicology 33: 345–348Google Scholar
Schmidt, E S, Newton, G W, Sanders, S M, Lewis, J P and Conn, E E 1978 Laetrile toxicity studies in dogs. Journal of the American Medical Association 239: 943–947CrossRefGoogle ScholarPubMed
Scott, W N 1969 The humane control of rats and mice by chemical means. In: The Humane Control of Animals Living in the Wild, UFAW Symposium, 23 January 1969 pp 17–20. UFAW: Wheathampstead, Hertfordshire, UKGoogle Scholar
Scott, W W, Fishman, E K and Siegelman, S S 1984 Anticoagulants and abdominal pain — the role of computed tomography. Journal of the American Medical Association 252: 2053–2056Google ScholarPubMed
Sheafor, S E and Couto, C G 1999 Anticoagulant rodenticide toxicity in 21 dogs. Journal of the American Animal Hospital Association 35: 38–46CrossRefGoogle ScholarPubMed
Sheikher, C and Jain, S D 1995 Rodenticidal efficacy of cholecalciferol. Proceedings of the Indian National Science Academy Part B — Biological Sciences 61: 31–38Google Scholar
Shepherd, D S and Inglis, I R 1993 Toxic bait aversions in different rat strains exposed to an acute rodenticide. Journal of Wildlife Management 57: 640–647CrossRefGoogle Scholar
Shore, R F, Birks, J D S and Freestone, P 1999 Exposure of non-target vertebrates to second-generation rodenticides in Britain, with particular reference to the polecat Mustela putorius. New Zealand Journal of Ecology 23: 199–206Google Scholar
Shore, R F, Birks, JDS, Freestone, P and Kitchener, A C 1996 Second generation rodenticides and polecats Mustela putorius. Environmental Pollution 91: 279–282CrossRefGoogle ScholarPubMed
Sittig, M 1991 Handbook of Toxic and Hazardous Chemicals and Carcinogens, Volume 12, Edn 3. Noyes Publications: New Jersey, USAGoogle Scholar
Siwach, S B, Dua, A, Sharam, R, Sharma, D and Mehla, R K 1995 Tissue magnesium content and histopathological changes in non-survivors of aluminium phosphide poisoning. Journal of the Association of Physicians of India 43: 676–678Google ScholarPubMed
Smith, D A 1997 Pharmacokinetics and pharmacodynamics in toxicology. Xenobiotica 27: 513–525CrossRefGoogle ScholarPubMed
Smith, R H 1994 Control methods: non-chemical and non-lethal chemical. In: Buckle, A P and Smith, R H (eds) Rodent Pests and their Control pp 109–126. CAB International: Wallingford, Oxon, UKGoogle Scholar
Smith, P, Inglis, I R, Cowan, D, Kerins, D R and Bull, D S 1994b Symptom-dependent taste aversion induced by an anticoagulant rodenticide in the brown rat Rattus norvegicus. Journal of Comparative Psychology 108: 282–290CrossRefGoogle ScholarPubMed
Smith, W and Harrap, S B 1997 Behavioural and cardiovascular responses of rats to euthanasia using carbon dioxide gas. Laboratory Animals 31: 337–346CrossRefGoogle ScholarPubMed
Sorex Ltd 1992 Difenacoum Safety Sheet. Sorex Ltd: Widnes, UKGoogle Scholar
Stanko, M, Mosansky, L, Fricova, J and Casanova, J C 1999 Comparison of two sampling methods in the margin of a lowland forest. Biologia 54: 595–597Google Scholar
Stanton, P E, Wilson, J P, Lamis, P A and Letton, A H 1974 Acute abdominal conditions induced by anticoagulant therapy. American Surgeon 40: 1–14Google ScholarPubMed
Stephenson, B H, Minot, E O and Armstrong, D P 1999 Fate of moreporks (Ninox novaeseelandiae) during a pest control operation on Mokoia Island, Lake Rotorua, New Zealand. New Zealand Journal of Ecology 23: 233–240Google Scholar
Sterner, R T and Mauldin, R E 1995 Regressors of whole-carcass zinc phosphide/phosphine residues in voles: indirect evidence of low hazards to predators/scavengers. Archives of Environmental Contamination and Toxicology 28: 519–523CrossRefGoogle ScholarPubMed
Stone, W B, Okoniewski, J C and Stedelin, J R 1999 Poisoning of wildlife with anticoagulant rodenticides in New York. Journal of Wildlife Diseases 35: 187–193CrossRefGoogle ScholarPubMed
Stratbücker, R A 1984 Safety Technical Evaluation of the Model XR5000 Electronic ‘Stun Gun’. University of Nebraska Medical Center: Omaha, USAGoogle Scholar
Suchard, J R, Wallace, K L and Gerkin, R D 1998 Acute cyanide toxicity caused by apricot kernel ingestion. Annals of Emergency Medicine 32: 742–744CrossRefGoogle ScholarPubMed
Sugihara, R, Tobin, M E and Koehler, A E 1995 Zinc phosphide baits and prebaiting for controlling rats in Hawaiian sugarcane. Journal of Wildlife Management 59: 882–889CrossRefGoogle Scholar
Surgeoner, G A 1996 Rodent Control in Livestock Facilities. Factsheet 86-036, ISSN 1198-712X. Ministry of Agriculture, Food and Rural Affairs: Ontario, Canada http://www.gov.on.ca/OMAFRA/English/livestock/dairy/facts/86-036.htm#ProblemGoogle Scholar
Talcott, P A, Mather, G G and Kowitz, E H 1991 Accidental ingestion of a cholecalciferol-containing rodent bait in a dog. Veterinary and Human Toxicology 33: 252–256Google Scholar
Talman, W T, Perrone, M H and Reis, DJ 1981 Acute hypertension after the local injection of kainic acid into the nucleus tractus solitarii of rats. Circulatory Research 48: 292–298CrossRefGoogle ScholarPubMed
Taser International 1996 Air Taser electrical specifications. http://www.taser.com/Tech/ElecTheoryOp.htmGoogle Scholar
Taser International 2002a Advanced Taser M-Series on-line owners’ manual. http://www.taser.com/Tech/M_Manual.htmGoogle Scholar
Taser International 2002b Notes on clips from Taser volunteer test. http://www.taser.com/Med_Stud/misc/page4.htmGoogle Scholar
Taser International 2002c The Taser development program. http://www.taser.com/Med_Stud/Google Scholar
Thijssen, H H W 1995 Warfarin-based rodenticides: mode of action and mechanism of resistance. Pesticide Science 43: 73–78CrossRefGoogle Scholar
Thomas, H M, Simpson, D and Prescott, L F 1988 The toxic effects of alpha-chloralose. Human Toxicology 7: 285–287CrossRefGoogle ScholarPubMed
Thorsen, M, Shorten, R, Lucking, R and Lucking, V 2000 Norway rats (Rattus norvegicus) on Fregate Island, the Seychelles: the invasion, subsequent eradication attempts and implications for the island's fauna. Biological Conservation 96: 133–138CrossRefGoogle Scholar
Timm, R M 1994a Description of active ingredients. Cooperative Extension Division, Institute of Agriculture and Natural Resources, University Of Nebraska: Lincoln, USAGoogle Scholar
Timm, R M 1994b Norway rats. In: Hyngstrom, S E, Timm, R M and Larson, G E (eds) Prevention and Control of Wildlife Damage, Volumes 1-2. University of Nebraska: Lincoln, USAGoogle Scholar
Tox-In 2000 Alpha-Chloralose and Crimidine.Google Scholar
http://www.egora.fr/Tox-In/toxiangl/protocol/chloralo/chloralo0.htmGoogle Scholar
Trap-Man 2002 Traps live catch and humane traps, http://www.trap-man.comGoogle Scholar
UCMP (University of California Museum of Palaeontology) 2001 Introduction to the Rodentia. http://www.ucmp.berkeley.edu/mammal/rodentia/rodentia.htmlGoogle Scholar
Van Nie, G W 1975 Possible chloralose poisoning in buzzards. Tijdschrift voor Diergeneeskunde 100: 1052–1053 (in Dutch, English abstract)Google ScholarPubMed
Van Vuren, D, Moore, T G and Ingles, C A 1998 Prey selection by barn owls using artificial nestboxes. California Fish and Game 84: 127–132Google Scholar
Victor 2001 Victor Poison-Free, http://www.victorpest.com/Google Scholar
Warburton, B 2002 Rat Zapper Test Results. Unpublished report to National Animal Welfare Advisory Committee, New ZealandGoogle Scholar
Warburton, B and Drew, K W 1994 Extent and nature of cyanide shyness in some populations of Australian brushtail possums in New Zealand. Wildlife Research 21: 599–605CrossRefGoogle Scholar
Warburton, B, Gregory, N G and Morriss, G 2000 Effect of jaw shape in kill-traps on time to loss of palpebral reflexes in brushtail possums. Journal of Wildlife Diseases 36: 92–96CrossRefGoogle ScholarPubMed
Waritz, R S and Brown, R M 1975 Acute and subacute inhalation toxicities of phosphine, phenylphosphine and triphenylphosphine. American Industrial Hygiene Association Journal 36: 452–458CrossRefGoogle ScholarPubMed
Waxman, M and Baird, G J 1978 Corpus luteum hemorrhage: cause of acute abdominal pain in patient receiving anticoagulant therapy. Journal of the American Medical Association 239: 2270–2271CrossRefGoogle Scholar
Weile, P 2001 Report concerning test of alternative rats control in the municipality of Albertslund 2000/2001 (November 2001). The Island's Rat Control Consultant of the Danish Environmental Protection Agency: Copenhagen, DenmarkGoogle Scholar
Weingarden, M 2000 Humane Rodent Extermination, http://www.rat-zapper.comGoogle Scholar
WHO (World Health Organization) 1995 Anticoagulant Rodenticides — Environmental Health Criteria No. 175. WHO: Geneva, SwitzerlandGoogle Scholar
Wildlife Damage Review 2001 Jim Bob's Poisons: Specific ADC Poisons. http://www.astarnet.com/~wdr/Jbpoison.htmlGoogle Scholar
Wilson, R, Lovejoy, F H, Jaeger, R J and Landrigan, P L 1980 Acute phosphine poisoning aboard a grain freighter: epidemiologic, clinical and pathological findings. Journal of the American Medical Association 244: 148–150CrossRefGoogle ScholarPubMed
Wolfensohn, S and Lloyd, M 1998 Handbook of Laboratory Animal Management and Welfare, Edn 2. Blackwell Science: Oxford, UKGoogle Scholar
Woodman, N, Timm, R M, Slade, N A and Doonan, T J 1996 Comparison of traps and baits for censusing small mammals in neotropical lowlands. Journal of Mammalogy 77: 274–281CrossRefGoogle Scholar
Wright, S 2001 Shock tactics. New Scientist (11 August) 171: 11Google Scholar
Yates, D A H and Smith, MA 1989 Orthopaedic pain after trauma. In: Wall, P D and Melzack, R (eds) Textbook of Pain pp 327–334. Longman: London, UKGoogle Scholar
Zeegeren K van 1980 Variation in aggressiveness and the regulation of numbers in house mouse populations. Netherlands Journal of Zoology 30: 635–770Google Scholar
Zeinelabdin, M H and Marsh, R E 1991 The potential of the rodenticide calciferol in producing conditioned taste aversion poison shyness in laboratory rats Rattus Norvegicus. Zeitschrift für Angewandte Zoologie 78: 471–483Google Scholar