Pest fencing or pest trapping: A bio‐economic analysis of cost‐effectiveness

Norbury, Grant; Hutcheon, Andy; Reardon, James T.; Daigneault, Adam

doi:10.1111/aec.12147

Cited by 32 publications

(27 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Control of introduced predators to a level that allows establishment, growth and persistence of lizard populations is costly and needed in perpetuity (Norbury et al 2014a). There is no information to suggest that predator control operations that benefit birds or general ecosystem health are sufficient to allow translocated lizard populations to establish or persist.…”

Section: Concerns About Mitigation-driven Translocationsmentioning

confidence: 99%

Trends in lizard translocations in New Zealand between 1988 and 2013

Romijn

Hartley

2016

New Zealand Journal of Zoology

View full text Add to dashboard Cite

There is growing concern about mitigation-driven translocations that move animals from anthropogenic threats at donor sites because of their failure rate and lack of application of scientific principles and best practice. We reviewed all known lizard translocations in New Zealand between 1988 and 2013 and identified 85 translocations of 30 lizard taxa to 46 release sites. Most translocations (62%) were motivated by conservation goals for the species or the release site, and one-third were mitigationdriven translocations, typically motivated by habitat loss due to development. Mitigation-driven translocations began in 2003, and since that time have equalled the number of conservationmotivated translocations. Conservation-motivated translocations usually released lizards on islands without mammalian predators, whereas mitigation-driven translocations usually relocated lizards to mainland sites with introduced predators. Long-term monitoring has been sparse and often rudimentary. Eight lizard translocations have recorded population growth, including one mitigation-driven translocation that was into a fenced reserve. Research on commonly used management techniques to mitigate human-related impacts is recommended to establish whether these techniques benefit lizards in the long term. ARTICLE HISTORY

show abstract

Section: Concerns About Mitigation-driven Translocationsmentioning

confidence: 99%

Trends in lizard translocations in New Zealand between 1988 and 2013

Romijn

Hartley

2016

New Zealand Journal of Zoology

View full text Add to dashboard Cite

show abstract

“…Friend & Thomas, ; Moseby et al ., ; Hayward et al ., ) and have been successful for the Eastern barred bandicoot, most notably at Mt Rothwell. However, the ability to fence and manage land and the associated management costs mean this technique may not be sustainable in the long term (Scofield et al ., ; Norbury et al ., ; Coetsee, ). New trials with Maremma dogs and Eastern barred bandicoots will be carried out at three locations in western Victoria over the next 5 years to determine the effectiveness of this form of protection, and may provide a means to re‐establish the species outside fences.…”

Section: Future Plans and Solutionsmentioning

confidence: 88%

New hope for the Eastern barred bandicoot Perameles gunnii after 27 years of recovery effort

Parrott

Coetsee

Hartnett

et al. 2017

International Zoo Yearbook

View full text Add to dashboard Cite

The Eastern barred bandicoot Perameles gunnii (mainland unnamed subspecies) is classified as ‘extinct in the wild’ and has been the focus of a 27 year captive‐breeding and recovery programme. To date, the programme has successfully prevented the complete loss of this species, through the use of captive insurance populations and predator‐barrier fences, but has not yet delivered recovery in the wild. The key threats to this bandicoot are habitat loss and introduced predators; both difficult to mitigate. An active multi‐agency Recovery Team operates to conserve the Eastern barred bandicoot, manage recovery actions, and promote awareness and advocacy. The captive‐breeding programme has produced 920 offspring, 551 of which have been released to free‐ranging sites. Despite a slight but steady decline in genetic diversity over the duration of the programme, there does not appear to have been a significant loss of genetic fitness in the population, based on breeding rates, litter size and longevity. Animals have been released at a total of nine sites, with Eastern barred bandicoots currently present and breeding at four fox‐free locations. An ambitious plan is under way to more than double the current population to over 2500 individuals across several large self‐sustaining populations. This plan includes assisted colonization to fox‐free islands outside the natural range of the bandicoot and trialling the use of guardian dogs to protect unfenced, free‐ranging populations. Implementation of this Recovery Plan over the next 4 years will involve an array of conservation partners, and aims to down list the conservation status of the species and secure its future in the wild.

show abstract

“…, Norbury et al. ). An 8.0% discount rate is the New Zealand Treasury standard for public‐sector cost analyses.…”

Section: Methodsmentioning

confidence: 99%

Inferential and forward projection modeling to evaluate options for controlling invasive mammals on islands

Anderson

McMurtrie²,

Edge³

et al. 2016

Ecological Applications

View full text Add to dashboard Cite

Abstract. Successful pest-mammal eradications from remote islands have resulted in important biodiversity benefits. Near-shore islands can also serve as refuges for native biota but require ongoing effort to maintain low-pest or pest-free status. Three management options are available in the presence of reinvasion risk: (1) control-to-zero density, in which immigration may occur but reinvaders are removed; (2) sustained population suppression (to relatively low numbers); or (3) no action. Biodiversity benefits can result from options one and two. The management challenge is to make evidence-based decisions on the selection of an appropriate objective and to identify a financially feasible control strategy that has a high probability of success. This requires understanding the pest species population dynamics and how it will respond to a range of potential management strategies, each with an associated financial cost. We developed a two-stage modeling approach that consisted of (1) Bayesian inferential modeling to estimate parameters for a model of pest population dynamics and control, and (2) a forward projection model to simulate a range of plausible management scenarios and quantify the probability of obtaining zero density within four years. We applied the model to an ongoing, six-year trapping program to control stoats (Mustela erminea) on Resolution Island, New Zealand. Zero density has not yet been achieved. Results demonstrate that management objectives were impeded by a combination of a highly fecund population, insufficient trap attractiveness, and a substantial proportion of the population that did not enter traps. Immigration is known to occur because the founding population arrived on the island by swimming from the mainland. However, immigration rate during this study was indistinguishable from zero. The forward projection modeling showed that control-to-zero density was feasible but required greater than a two-fold budget increase to intensify the trapping rate relative to population growth. The two-stage modeling provides the foundation for a management program in which broad-scale trials of additional trapping effort or improved trap lures would test model predictions and increase our understanding of system dynamics.

show abstract

Pest fencing or pest trapping: A bio‐economic analysis of cost‐effectiveness

Cited by 32 publications

References 14 publications

Trends in lizard translocations in New Zealand between 1988 and 2013

Trends in lizard translocations in New Zealand between 1988 and 2013

New hope for the Eastern barred bandicoot Perameles gunnii after 27 years of recovery effort

Inferential and forward projection modeling to evaluate options for controlling invasive mammals on islands

Contact Info

Product

Resources

About