Abstract
Pest control operations andexperimentation on sentient animals such as thebrushtail possum can cause unnecessary andavoidable suffering in the animal subjects.Minimizing animal suffering is an animalwelfare goal and can be used as a guide in thedesign and execution of animal experimentationand pest control operations.
The public has little sympathy for the possum,which can cause widespread environmentaldamage, but does believe that control should beas painless as possible. Trapping and poisoningprovide only short-term solutions to the possumproblem and often involve methods that causesuffering. Intrusive experiments connected withthese methods of control and published in thelast 6 years are reviewed. Many of theexperiments do not attain the welfare standardsrequired by members of the public.
Possums also act as vectors for bovinetuberculosis. While this is not as important inthe minds of the public as environmentaldegradation, as long as people wish to continueraising cattle, this disease needs to becontrolled.
Immunocontraception is a humane means ofcontrolling possums with wide publicacceptance. The use of vaccines for cows and/orpossums would also cause far less sufferingthan present eradication operations. Researchinto these methods does require some intrusiveexperimentation. This can be reduced if liveanimals are not used for secondary antibodyharvesting, if adequate analgesia is provided,and if potential vaccines or contraceptives aretested under conditions that would beexperienced in the field.
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REFERENCES
Aldhouse, P. A., A. Coghlan, and J. Copley, “Let the People Speak,” New Scientist (22May 1999), 26–31.
Antoniou, M., Witness Brief, NZ Royal Commission on Genetic Modification, http://www.gmcommission.govt.nz/ (2000).
Bayvel, A. C. D., “The New Zealand Regulatory Approach to the Use of Live Animals in Research, Testing and Teaching,” in M. Balls, A-M van Zeller, and M. E. Halder (eds.), Progress in the Reduction, Refinement and Replacement of Animal Experimentation (Elsevier, London, 2000), pp. 1023–1031.
Buddle, B., F. E. Aldwell, D. L. Keen, N. A. Parlane, G. Yates, and G. W. De Lisle, “Intraduodenal Vaccination of Brushtail Possums with Bacille Calmette-Guerin Enhances Immune Responses and Protection Against Mycobacterium bovis Infection,” International Journal of Tuberculous Lung Diseases 1 (1997), 377–383.
Buddle, B. M., M. A. Skinner, and M. A. Chambers, “Immunological Approaches to the Control of Tuberculosis in Wildlife Reservoirs,” Veterinary Immunology and Immunopathology 74 (2000), 1–16.
Caly, P., G. J. Hickling, P. E. Cowan, and D. U. Pfeiffer, “Effects of Sustained Control of Brushtail Possums on Levels of Mycobacterium bovis Infection in Cattle and Brushtail Possum Populations from Hohotaka, New Zealand,” New Zealand Veterinary Journal 47 (1999), 133–142.
Chilov, D., G. Camenisch, M. Tini, P. Spielmann, and M. Gassman, “Chicken Yolk IgY — n Alternative to Mammalian Antibodies,” in M. Balls, A-M van Zeller, and M.E. Halder (eds.), Progress in the Reduction, Refinement and Replacement of Animal Experimentation (Elsevier, London, 2000), pp. 865–872.
Clapperton, B. K., L. R. Matthews, M. S. Fawkes, and A. J. Pearson, “Lithium and Cyanide-Induced Conditioned Food Aversions in Brushtail Possums,” Journal ofWildlife Management 60 (1996), 195–201.
Coleman, J. and P. Livingstone, “Fewer Possums: Less Bovine Tb,” in T. L. Montague (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000), pp. 220–231.
Cooke, M. M., B. M. Buddle, F. E. Aldwell, D. N. McMurray, and M. R. Alley, “The Pathogenesis of Experimental Endo-Bronchial Mycobaterium bovis Infection in Brushtail Possums (Trichosurus vulpecula),” New Zealand Veterinary Journal 47 (1999), 187–192.
Cowan, P. “Biological Control of Possums: Prospects for the Future,” in T. L. Montague (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000), pp. 262–270.
Crawford, J. L., G. H. Shackell, E. G. Thompson, B. J. McLeod, and P. R. Hurst, “Preovulatory Follicle Development and Ovulation in the Female Brushtail Possum (Trichosurus vulpecula) Monitored by Repeated Laparoscopy,” Journal of Reproduction and Fertility 110 (1997), 361–370.
Davies, B., “In-depth Survey of Public Attitudes Shows Surprising Degree of Acceptance,” RDS News, April 2000, 8–9.
de Leeuw, W. A. and P. de Greeve, “Production of Polyclonal and Monoclonal Antibodies in The Netherlands,” in L. F. M. van Zutphen and M. Balls (eds.), Animal Alternatives, Welfare and Ethics (London: Elsevier Science, 1999), pp. 1053–1059.
De Lisle, G. W., T. Wilson, D. M. Collins, and B. M. Buddle, “Vaccination of Guinea Pigs with Nutritionally Impaired Avirulent Mutants of Mycobacterium bovis Protects Against Tuberculosis,” Infection and Immunity 67 (1999), 2624–2626.
Department of Conservation (DOC), The New Zealand Biodiversity Strategy (Wellington, 2000).
Eason, C. T., G. R. Wright, and D. Batcheler, “Anticoagulant Effects and the Persistence of Brodifacoum in Possums (Trichosurus vulpecula),” New Zealand Journal of Agricultural Research 39 (1996), 397–400.
Eason, C. T., B. Warburton, and R. Henderson, “Toxicants Used for Possum Control,” in T. L. Montague (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000), pp. 154–163.
Fitzgerald, G. P., R. Wilkinson, and L. Saunders, “Public Perceptions and Issues in Possum Control,” in T. L. Montague (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000), pp. 187–196.
Galfré, G. and C. Milstein, “Preparation of Monoclonal Antibodies: Strategies and Procedures,” Methods in Enzymology 73, (1981) 3–46.
Gregory, N. G., L. M. Milne, A. T. Rhodes, K. E. Littin, M. Wickstrom, and C. T. Eason, “Effect of Potassium Cyanide on Behaviour and Time to Death in Possums,” New Zealand Veterinary Journal 46 (1998), 60–64.
Gregory, N. G., G. M. B. Orbell, and D. R. K. Harding, “Poisoning with 3 Nitropropionic Acid in Possums (Trichosurus vulpecula),” New Zealand Veterinary Journal 48 (2000), 85–87.
Henderson, C. M., D. R. Frampton, D. Morgan, and G. J. Hickling, “The Efficacy of Baits Containing 1080 for Control of Brushtail Possums,” Journal of Wildlife Management 63 (1999), 1138–1151.
Ji, W., M. N. Clout, and S. D. Sarre, “Behaviour Response of Possums to Female Sterilisation,” in Advances in the Biological Control of Possums, Royal Society of New Zealand Miscellaneous Series 56 (1999), pp. 88–91.
Jolly, S. E. and E. B. Spurr, “Effect of Ovariectomy on the Social Status of Brushtail Possums (Trichosurus vulpecula) in Captivity,” New Zealand Journal of Zoology 23 (1996), 27–32.
Khalil, A. M., R. G. McFarlane, and J. A. Duckworth, “Humoral Immunity to Cholera Toxin and Ovalbumin in the Brushtail Possum (Trichosurus vulpecula),” New Zealand Veterinary Journal 49 (2001), 54–59.
McArdle, J. “A Review of Common Misconceptions Associated with the in vivo Ascites and in vitro Production,” in M. Balls, A-M van Zeller, and M. E. Halder (eds.), Progress in the Reduction, Refinement and Replacement of Animal Experimentation (Elsevier, London, 2000), pp. 857–863.
McCaw, A., “The Three Rs and How They are Promoted,” in Proceedings of the Joint ANZCCART/ANAEC Conference, Auckland, New Zealand 1997 (1998), pp. 85–90.
McLeod, B. J., E. G. Thompson, and J. L. Crawford, “Synchrony of Onset and Cessation of Breeding Activity in Brushtail Possums (Trichosurus vulpecula) in Coastal Otago, New Zealand,” Proceedings of the New Zealand Society of Animal Production 59 (1999), 229–232.
Miller, C. J. “An Evaluation of Two Possum Trap Types for Catch-Efficiency and Humaneness,” Journal of the Royal Society of New Zealand 23 (1993), 5–11.
MAF (Ministry of Agriculture), Code of Recommendations and Minimum Standards for the Care and Use of Animals for Scientific Purposes (Wellington, 1995).
MAF (Ministry of Agriculture), Animal Use Statistics (Wellington, 2001).
Molinia, F. C, R. J. Gibson, A. M. Brown, A. M. Glazier, and J. C. Rodger, “Successful Fertilization after Superovulation and Laparoscopic Intrauterine Insemination of the Brushtail Possum, Trichosurus vulpecula, and Tammar Wallaby, Macropus eugenii,” Journal of Reproduction and Fertility 112 (1998), 9–17.
Montague, T. L. (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000).
Morris, M. C. “Issues Associated with Research on Sheep Parasite Control in New Zealand — a Descriptive Ethic,” Journal of Agricultural and Environmental Ethics 16 (2003), 187–207.
Morris, M. C. and S. A. Weaver, “Minimizing Harm in Agricultural Animal Experiments in New Zealand,” Journal of Agricultural and Environmental Ethics, in press (2003).
Morton, D. “The Use of Score Sheets in the Implementation of Humane End Points,” in Proceedings of the joint ANZCCART/ANAECConference, Auckland, New Zealand 1997 (1998), pp. 75–82.
Moss, Z. N., C. E. O'Connor, and G. J. Hickling, “Implications of Prefeeding for the Development of Bait Aversions in the Brushtail Possum (Trichosurus vulpecula),” Wildlife Research 25 (1998), 133–138.
National Academy of Sciences, Recognition and Alleviation of Pain and Distress in Laboratory Animals (National Academy Press, Washington, 1992).
Niklas, W., “Alternatives to Freund's Adjuvant,” in van L. F. M. Zutphen and M. Balls (eds.), Animal Alternatives, Welfare and Ethics (Elsevier Science, London, 1997), pp. 1061–1064.
Nutman, A. W, N. G. Gregory, and B. Warburton, “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 (1998), 177–181.
O'Connor, C. E., L. M. Milne, D. G. Arthur, W. A. Ruscoe, and M. Wickstrom, “Toxicity Effects of 1080 on Pregnant Ewes,” Proceedings of the New Zealand Society for Animal Production 59 (1999), 250–253.
OECD, “OECD Reaches Agreement to Abolish Unnecessary Animal Testing,” News Release, Paris, 29th November 2000 (http://www1.oecd.org/media/release/ nw00-124a.htm).
O'Reilly, L. M. and C. J. Daborn, “The Epidemiology of Mycobacterium bovis Infection in Animals and Man: A Review,” Tubercle and Lung Disease 76(supplement 1) (1995), 1–46.
Payton, I. “Damage to Native Forests,” in T. L. Montague (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000), pp. 111–125.
Parliamentary Commissioner for the Environment (PCE), Caught in the Headlights: New Zealanders' Reflections on Possums, Control Options and Genetic Engineering (PCE, Wellington, 2000).
Regan, T., The Case for Animal Rights (University of California Press, Berkeley, 1983).
Rollin, B. E., Animal Rights and Human Morality (Prometheus, Buffalo, 1981).
Sadleir, R. “Evidence of Possums as Predators of Native Animals,” in T. L. Montague (ed.), The Brushtail Possum: Biology, Impact and Management of an Introduced Marsupial (Manaaki Whenua Press, Lincoln, 2000), pp. 126–131.
Singer, P. “Neither Human nor Natural: Ethics and Feral Animals,” Reproduction, Fertility and Development 9 (1997), 157–162.
Stankiewicz, M., P. E. Cowan, and D. D. Heath, “Endoparasites of Possums from Selected Areas of North Island, New Zealand,” New Zealand Journal of Zoology 25 (1998), 91–97.
Thomas, M. D., D. A. Wright, J. Mason, and K.W. Briden, Use of Bait Stations for Possum and Feral Cat Control (Department of Conservation, Wellington, 1998).
Traavik, T., Witness Brief, NZ Royal Commission on Genetic Modification. http://www. gmcommission.govt.nz. (2000).
Warburton, B., “Victor Foot-Hold Traps for Catching Australian Brushtail Possums in New Zealand: Capture Efficiency and Injury,” Wildlife Society Bulletin 20 (1992), 67–73.
Warburton, B. “Evaluation of Escape Rates by Possums Captured in Victor No. 1 Soft Catch Traps,” New Zealand Journal of Zoology 25 (1998), 99–103.
Warburton, B. and K. W. Drew, “Extent and Nature of Cyanide Shyness in Some Populations of Australian Brushtail Possums in New Zealand,” Wildlife Research 21 (1994), 599–605.
Warburton, B. and I. Orchard, “Evaluation of Five Kill Traps for Effective Capture and Killing of Australian Brushtail Possums (Trichosurus vulpecula),” New Zealand Journal of Zoology 23 (1996), 307–314.
Warburton, B., N. G. Gregory, and G. Morriss, “Effect of Jaw Shape in Kill-Traps on Time to Loss of Palpebral Reflexes in Brushtail Possums,” Journal of Wildlife Diseases 36 (2000), 92–96.
Wedlock, D. N., F. E. Aldwell, D. M. Collins, G.W. De Lisle, T. Wilson, and B.M. Buddle, “Immune Responses Induced in Cattle by Virulent and Attenuated Mycobacterium bovis Strains: Correlation of the Delayed-Type Hypersensitivity with Ability of Strains to Grow in Macrophages,” Infection and Immunity 67 (1999), 2172–2177.
Wilkinson, R. and G. Fitzgerald, Preliminary Findings from a Quantitative Survey of New Zealand Public Attitudes Toward Possum Control and Genetic Modification (Landcare Research, Lincoln, 2001).
Wills, P. R., Witness Brief, NZ Royal Commission on Genetic Modification. http://www. gmcommission.govt.nz (2000).
Wright, W. A., “Treating Animals as Ends,” The Journal of Value Inquiry 27 (1993), 353–366.
Zbinden, G. and M. Flury-Roversi, “Significance of the LD50-Test for the Toxicological Evaluation of Chemical Substances,” Archives of Toxicology 47 (1981), 77–99.
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Morris, M.C., Weaver, S.A. Minimizing Harm in Possum Control Operations and Experiments in New Zealand. Journal of Agricultural and Environmental Ethics 16, 367–385 (2003). https://doi.org/10.1023/A:1025690218626
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DOI: https://doi.org/10.1023/A:1025690218626