Underlying beliefs linked to public opinion about gene drive and pest-specific toxin for pest control
Edith A. MacDonald
A C , Eric Edwards A , Jovana Balanovic A and Fabien Medvecky B
+ Author Affiliations
- Author Affiliations
A Department of Conservation, Conservation House, 18–32 Manners Street, Wellington 6011, New Zealand.
B Centre for Science Communication, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
C Corresponding author. Email: emacdonald@doc.govt.nz
Wildlife Research - https://doi.org/10.1071/WR19149
Submitted: 23 August 2019 Accepted: 6 June 2020 Published online: 8 September 2020
Abstract
Context: Developing a new tool for wide-scale rat eradication is necessary for significant biodiversity gains. Underlying beliefs linked to public opinion can help guide policy makers to understand public concern and inform an effective discourse.
Aims: We investigated underlying beliefs linked to levels of support for a potentially disruptive tool, gene drive, compared with a traditional stepwise tool, aerial distribution of a new pest-specific toxin.
Methods: Using the theory of planned behaviour, we surveyed (n = 1200) a representative sample of New Zealanders to assess the level of support for the tool related to attitude, normative and control beliefs.
Key results: Attitude (e.g. gene drive is good/bad and gene drive is risky/safe) and two norms (e.g. people like me and people in my household) were key contributors to level of support for gene drive. Behavioural beliefs (if scientific evidence can prove it works, concern there are unknown consequences, a humane way to rid New Zealand of rats, and gene drive goes against natural way of life) were also significant. For aerial distribution of a new pest-specific toxin, the same attitudes and normative beliefs identified for gene drive also contributed significantly to the model. Four behavioural beliefs, namely, aerial delivery could affect areas outside the target zones, if there is scientific evidence, and it is impossible to make a pest-specific toxin that would not harm our native wildlife were also significant. The impact either tool may have on biodiversity was not significant in either model.
Conclusions: Decision making about both gene drive (a disruptive technology) and aerial distribution of a pest-specific toxin (a stepwise technology) is primarily influenced by attitudes, with a few beliefs also influencing decision making. Novelty of the tool does not affect the underlying beliefs that are influencing levels of support.
Implications: Public engagement that acknowledges and responds to these underlying beliefs, rather than a traditional campaign based on biodiversity and environmental gains, may be more effective at creating a constructive dialogue about if and how these tools should be used, and to avoid replicating the polarised debate about 1080.
Additional keywords: conservation, genetics, human dimensions, invasive species.
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