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Ecology, management and conservation in natural and modified habitats
RESEARCH ARTICLE (Open Access)

Impacts of ‘Curiosity’ baiting on feral cat populations in woodland habitats of Kangaroo Island, South Australia

Rosemary Hohnen https://orcid.org/0000-0002-3638-6676 A B * , James Smith C , Josh Mulvaney C , Tom Evans C and Trish Mooney C
+ Author Affiliations
- Author Affiliations

A Research Institute for the Environment and Livelihoods, Building Yellow 2, Casurina Campus, Charles Darwin University, Ellengowan Drive, Darwin, NT 0810, Australia.

B NRM South, 297 Macquarie Street, South Hobart, Tas. 7004, Australia.

C Kangaroo Island Landscape Board, 37 Dauncey Street, Kingscote, SA 5223, Australia.

* Correspondence to: rosemary.hohnen@cdu.edu.au

Handling Editor: Penny Fisher

Wildlife Research 49(7) 637-645 https://doi.org/10.1071/WR21090
Submitted: 14 June 2021  Accepted: 21 February 2022   Published: 26 April 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Context: Across Australia, feral cat (Felis catus) control and eradication programs are conducted to conserve threatened and vulnerable species. Controlling feral cats effectively at a landscape scale, particularly in remote woodland habitats, remains a significant challenge. Unfortunately, some standard feral cat control methods, such as shooting and cage trapping, require road access. Poison baiting is one of the few methods available to control feral cat populations in remote and inaccessable areas.

Aims: We aimed to examine the impact of a Curiosity® (Scientec Research PTY LTD, Melbourne, Australia) baiting program on the feral cat population found in continuous woodland habitat of the Dudley Peninsula, on Kangaroo Island, South Australia.

Methods: The density of cats was monitored using camera traps set up across both treatment and control sites using a before–after control–impact approach. Feral cat density was calculated using a spatially explicit capture–recapture framework. In addition, 14 feral cats were GPS collared at the treatment site, and their status and location, before and after baiting, was monitored.

Key results: At the treatment site after baiting, feral cat density fell from 1.18 ± 0.51 to 0.58 ± 0.22 cats km−2. In total, 14 feral cats were GPS collared, and of those, eight were detected within the treatment zone during and after bait deployment. Six of those eight cats died shortly after baiting, likely from bait consumption. A new individual cat was detected in the treatment zone within 10 days of baiting, and within 20 days, four new individuals were detected. Both before and after baiting, the number of feral cat detections was highest on roads, suggesting cat recolonisation of baited areas may be assisted by roads.

Conclusions: Curiosity baiting was found to be an effective method for reducing the density of feral cats in continuous woodland habitats of Kangaroo Island. Roads may act as access routes aiding cat recolonisation.

Implications: Curiosity baiting programs on Kangaroo Island (and elsewhere) would benefit from incorporating follow-up control, particularly along roads, to target feral cats re-colonising the area.

Keywords: camera trapping, Curiosity baiting, Felis catus, habitat use, invasive species, Kangaroo Island, spatially explicit capture–recapture, threatened species, woodland habitats.


References

Algar, D, and Burrows, N (2004). Feral cat control research: Western Shield review – February 2003. Conservation Science Western Australia 5, 131–163.

Algar, D, Angus, GJ, Brazell, RI, Gilbert, C, and Withnell, GB (2010). Eradication of feral cats on Faure Island, Western Australia. Journal of the Royal Society of Western Australia 93, 133.

Algar, D, Onus, M, and Hamilton, N (2013). Feral cat control as part of rangelands restoration at Lorna Glen (Matuwa), Western Australia: the first seven years. Conservation Science Western Australia 8, 367–381.

Algar, D, Johnston, M, Tiller, C, Onus, M, Fletcher, J, Desmond, G, Hamilton, N, and Speldewinde, P (2020). Feral cat eradication on Dirk Hartog Island, Western Australia. Biological Invasions 22, 1037–1054.
Feral cat eradication on Dirk Hartog Island, Western Australia.Crossref | GoogleScholarGoogle Scholar |

Buckmaster, T, Dickman, CR, and Johnston, MJ (2014). Assessing risks to non-target species during poison baiting programs for feral cats. PLoS One 9, e107788.
Assessing risks to non-target species during poison baiting programs for feral cats.Crossref | GoogleScholarGoogle Scholar | 25229348PubMed |

Bureau of Meteorology (2020) Climate data online. In ‘http://www.bom.gov.au/climate/data/?ref=ftr’. (Bureau of Meteorology, Canberra, ACT, Australia)

Comer, S, Clausen, L, Cowen, S, Pinder, J, Thomas, A, Burbidge, AH, Tiller, C, Algar, D, and Speldewinde, P (2020). Integrating feral cat (Felis catus) control into landscape-scale introduced predator management to improve conservation prospects for threatened fauna: a case study from the south coast of Western Australia. Wildlife Research 47, 762–778.
Integrating feral cat (Felis catus) control into landscape-scale introduced predator management to improve conservation prospects for threatened fauna: a case study from the south coast of Western Australia.Crossref | GoogleScholarGoogle Scholar |

Department of Primary Industries and Regions South Australia (2021) Directions for use of Curiosity PAPP feral cat baits (prepared bait) in South Australia. South Australian Government, Adelaide, SA, Australia.

Doherty, TS, Glen, AS, Nimmo, DG, Ritchie, EG, and Dickman, CR (2016). Invasive predators and global biodiversity loss. Proceedings of the National Academy of Sciences 113, 11261–11265.
Invasive predators and global biodiversity loss.Crossref | GoogleScholarGoogle Scholar |

Doherty, TS, Bengsen, AJ, and Davis, RA (2015). A critical review of habitat use by feral cats and key directions for future research and management. Wildlife Research 41, 435–446.
A critical review of habitat use by feral cats and key directions for future research and management.Crossref | GoogleScholarGoogle Scholar |

Eason CT, Morgan DR, Clapperton BK (1992) Toxic bait and baiting strategies for feral cats. In ‘Proceedings of the Fifteenth Vertebrate Pest Conference, 3–5 March, 1992, Newport Beach, CA, USA’. pp. 371–376. (Eds E Borrecco, RE Marsh) Available at https://digitalcommons.unl.edu/vpc15/25

Efford MG (2020) secr: Spatially explicit capture–recapture models. In ‘R package version 4.3.1’. https://CRAN.R-project.org/package=secr

Fancourt, BA, Augusteyn, J, Cremasco, P, Nolan, B, Richards, S, Speed, J, Wilson, C, and Gentle, MN (2021). Measuring, evaluating and improving the effectiveness of invasive predator control programs: feral cat baiting as a case study. Journal of Environmental Management 280, 111691.
Measuring, evaluating and improving the effectiveness of invasive predator control programs: feral cat baiting as a case study.Crossref | GoogleScholarGoogle Scholar | 33272660PubMed |

Geyle, HM, Stevens, M, Duffy, R, Greenwood, L, Nimmo, DG, Sandow, D, Thomas, B, White, J, and Ritchie, EG (2020). Evaluation of camera placement for detection of free‐ranging carnivores; implications for assessing population changes. Ecological Solutions and Evidence 1, e12018.
Evaluation of camera placement for detection of free‐ranging carnivores; implications for assessing population changes.Crossref | GoogleScholarGoogle Scholar |

Heiniger, J, Cameron, SF, and Gillespie, G (2018). Evaluation of risks for two native mammal species from feral cat baiting in monsoonal tropical northern Australia. Wildlife Research 45, 518–527.
Evaluation of risks for two native mammal species from feral cat baiting in monsoonal tropical northern Australia.Crossref | GoogleScholarGoogle Scholar |

Hetherington, CA, Algar, D, Mills, H, and Bencini, R (2007). Increasing the target-specificity of ERADICAT® for feral cat (Felis catus) control by encapsulating a toxicant. Wildlife Research 34, 467–471.
Increasing the target-specificity of ERADICAT® for feral cat (Felis catus) control by encapsulating a toxicant.Crossref | GoogleScholarGoogle Scholar |

Hohnen, R, Murphy, BP, Legge, SM, Dickman, CR, and Woinarski, JCZ (2019). Uptake of ‘Eradicat’ feral cat baits by non-target species on Kangaroo Island. Wildlife Research 47, 547–556.
Uptake of ‘Eradicat’ feral cat baits by non-target species on Kangaroo Island.Crossref | GoogleScholarGoogle Scholar |

Hohnen, R, Berris, K, Hodgens, P, Mulvaney, J, Florence, B, Murphy, BP, Legge, SM, Dickman, CR, and Woinarski, JCZ (2020). Pre-eradication assessment of feral cat density and population size across Kangaroo Island, South Australia. Wildlife Research 47, 669–676.
Pre-eradication assessment of feral cat density and population size across Kangaroo Island, South Australia.Crossref | GoogleScholarGoogle Scholar |

Hradsky, BA, Robley, A, Alexander, R, Ritchie, EG, York, A, and Di Stefano, J (2017). Human-modified habitats facilitate forest-dwelling populations of an invasive predator, Vulpes vulpes. Scientific Reports 7, 1–12.
Human-modified habitats facilitate forest-dwelling populations of an invasive predator, Vulpes vulpes.Crossref | GoogleScholarGoogle Scholar |

Johnson, CN, and Isaac, JL (2009). Body mass and extinction risk in Australian marsupials: the ‘Critical Weight Range’ revisited. Austral Ecology 34, 35–40.
Body mass and extinction risk in Australian marsupials: the ‘Critical Weight Range’ revisited.Crossref | GoogleScholarGoogle Scholar |

Johnston MJ (2012) ‘Field assessment of the Curiosity bait for management of Feral Cats after fire at Wilsons Promontory National Park.’ (Department of Sustainability and Environment: Melbourne, Vic., Australia)

Johnston, MJ, Shaw, MJ, Robley, A, and Schedvin, NK (2007). Bait uptake by feral cats on French Island, Victoria. Australian Mammalogy 29, 77–83.
Bait uptake by feral cats on French Island, Victoria.Crossref | GoogleScholarGoogle Scholar |

Johnston MJ, Algar D, Onus M, Hamilton N, Hilmer S, Withnell B, Koch K (2009) A bait efficacy trial for the management of feral cats on Dirk Hartog Island. Arthur Rylah Institute for Environmental Research, Melbourne, Vic., Australia

Johnston MJ, Gigliotti F, O’Donoghue M, Holdsworth M, Robinson S, Herrod A, Eklom K (2012). Field assessment of the Curiosity bait for management of feral cats in the semi-arid zone (Flinders Ranges National Park). Arthur Rylah Institute for Environmental Research, Melbourne, Vic., Australia)

Johnston MJ, Bould L, O’Donoghue M, Holdsworth M, Marmion P, Bilney R, Reside A, Caldwell D, Gabarov R, Gentles T (2014) Field efficacy of the Curiosity bait for managing feral cats at Roxby Downs, South Australia. Arthur Rylah Institute for Environmental Research, Melbourne, Vic., Australia

Johnston, MJ, Algar, D, O’Donoghue, M, Morris, J, Buckmaster, T, and Quinn, J (2020). Efficacy and welfare assessment of an encapsulated para-aminopropiophenone (PAPP) formulation as a bait-delivered toxicant for feral cats (Felis catus). Wildlife Research 47, 686–697.
Efficacy and welfare assessment of an encapsulated para-aminopropiophenone (PAPP) formulation as a bait-delivered toxicant for feral cats (Felis catus).Crossref | GoogleScholarGoogle Scholar |

Lazenby, BT, Mooney, NJ, and Dickman, CR (2015). Effects of low-level culling of feral cats in open populations: a case study from the forests of southern Tasmania. Wildlife Research 41, 407–420.
Effects of low-level culling of feral cats in open populations: a case study from the forests of southern Tasmania.Crossref | GoogleScholarGoogle Scholar |

Legge, S, Murphy, BP, McGregor, H, Woinarski, J, Augusteyn, J, Ballard, G, Baseler, M, Buckmaster, T, Dickman, C, and Doherty, T (2017). Enumerating a continental-scale threat: how many feral cats are in Australia? Biological Conservation 206, 293–303.
Enumerating a continental-scale threat: how many feral cats are in Australia?Crossref | GoogleScholarGoogle Scholar |

McGregor, H, Legge, S, Potts, J, Jones, ME, and Johnson, CN (2015). Density and home range of feral cats in north-western Australia. Wildlife Research 42, 223–231.
Density and home range of feral cats in north-western Australia.Crossref | GoogleScholarGoogle Scholar |

McLeod L, Saunders G (2013) Pesticides used in the management of vertebrate pests in Australia: a review. NSW Department of Primary Industries, Orange, NSW, Australia.

Medina, FM, Bonnaud, E, Vidal, E, Tershy, BR, Zavaleta, ES, Donlan, CJ, Keitt, BS, Le Corre, M, Horwath, SV, and Nogales, M (2011). A global review of the impacts of invasive cats on island endangered vertebrates. Global Change Biology 17, 3503–3510.
A global review of the impacts of invasive cats on island endangered vertebrates.Crossref | GoogleScholarGoogle Scholar |

Medway, DG (2004). The land bird fauna of Stephens Island, New Zealand in the early 1890s, and the cause of its demise. Notornis 51, 201–211.

Natural Resources Kangaroo Island (2015) Feral cat eradication on Kangaroo Island 2015–2030. South Australian Department of Environment and Water, Kingscote, SA, Australia

Nishimura, Y, Goto, Y, Yoneda, K, Endo, Y, Mizuno, T, Hamachi, M, Maruyama, H, Kinoshita, H, Koga, S, and Komori, M (1999). Interspecies transmission of feline immunodeficiency virus from the domestic cat to the Tsushima cat (Felis bengalensis euptilura) in the wild. Journal of Virology 73, 7916–7921.
Interspecies transmission of feline immunodeficiency virus from the domestic cat to the Tsushima cat (Felis bengalensis euptilura) in the wild.Crossref | GoogleScholarGoogle Scholar | 10438892PubMed |

Phillips, RB, Winchell, CS, and Schmidt, RH (2007). Dietary overlap of an alien and native carnivore on San Clemente Island, California. Journal of Mammalogy 88, 173–180.
Dietary overlap of an alien and native carnivore on San Clemente Island, California.Crossref | GoogleScholarGoogle Scholar |

Robinson, S, Gadd, L, Johnston, M, and Pauza, M (2015). Long-term protection of important seabird breeding colonies on Tasman Island through eradication of cats. New Zealand Journal of Ecology 39, 316-–322.

Taggart, PL, Fancourt, BA, Peacock, D, Caraguel, CG, and McAllister, MM (2020). Variation in Toxoplasma gondii seroprevalence: effects of site, sex, species and behaviour between insular and mainland macropods. Wildlife Research 46, 540–546.
Variation in Toxoplasma gondii seroprevalence: effects of site, sex, species and behaviour between insular and mainland macropods.Crossref | GoogleScholarGoogle Scholar |

Veitch, CR (2001). The eradication of feral cats (Felis catus) from Little Barrier Island, New Zealand. New Zealand Journal of Zoology 28, 1–12.
The eradication of feral cats (Felis catus) from Little Barrier Island, New Zealand.Crossref | GoogleScholarGoogle Scholar |

Woinarski J, Burbidge A, Harrison P (2014) ‘The Action Plan for Australian Mammals 2012.’ (CSIRO Publishing: Melbourne, Vic., Australia)

Woinarski, JCZ, Garnett, ST, Legge, SM, and Lindenmayer, DB (2016). The contribution of policy, law, management, research, and advocacy failings to the recent extinctions of three Australian vertebrate species. Conservation Biology 31, 13–23.
The contribution of policy, law, management, research, and advocacy failings to the recent extinctions of three Australian vertebrate species.Crossref | GoogleScholarGoogle Scholar |

Wysong, ML, Hradsky, BA, Iacona, GD, Valentine, LE, Morris, K, and Ritchie, EG (2020a). Space use and habitat selection of an invasive mesopredator and sympatric, native apex predator. Movement Ecology 8, 18.
Space use and habitat selection of an invasive mesopredator and sympatric, native apex predator.Crossref | GoogleScholarGoogle Scholar | 32391154PubMed |

Wysong, ML, Iacona, GD, Valentine, LE, Morris, K, and Ritchie, EG (2020b). On the right track: placement of camera traps on roads improves detection of predators and shows non-target impacts of feral cat baiting. Wildlife Research 47, 557–569.
On the right track: placement of camera traps on roads improves detection of predators and shows non-target impacts of feral cat baiting.Crossref | GoogleScholarGoogle Scholar |