Detections of house mice on Gough Island approach zero within days of aerial baiting
Araceli Samaniego
A * , Kim L. Stevens B , Vonica Perold B , Steffen Oppel B and Pete McClelland B
A Manaaki Whenua – Landcare Research, 231 Morrin Road, St Johns, Auckland 1072, New Zealand.
B RSPB Centre for Conservation Science, Royal Society for the Protection of Birds, The David Attenborough Building, Pembroke Street, Cambridge CB2 3QZ, UK.
Wildlife Research 50(5) 381-388 https://doi.org/10.1071/WR22103
Submitted: 16 February 2022 Accepted: 2 August 2022 Published: 8 November 2022
© 2023 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: House mice (Mus musculus) on temperate Gough Island (6500 ha) are known for their large size, boldness, and tendency to kill large prey such as albatross chicks and even adults. To remove this threat, a mouse eradication operation was implemented in June–August 2021. How mice react to bait during eradications is not well understood, so we capitalised on this operation and conducted the first study with wild house mice during an actual eradication.
Aim: To document how rapidly mouse activity declined after application of rodent bait, to improve eradication guidelines.
Methods: We set up a monthly monitoring regime using 10 trail cameras without lures, active for three nights in various habitats around a research station, because this area supported the highest abundance of mice and was logistically feasible. Monitoring commenced before the mouse eradication operation (January–May 2021), and continued when rodent bait was spread (from June 2021), when mouse activity was monitored for 17 consecutive nights, starting the day before baiting. In addition, an increasing number of cameras (up to 15) associated with lures were set further afield in July–August to detect survivors.
Key results: In the months before bait application, mean daily mouse activity was 3.2 detections/camera (range: 0–56 detections/camera). Immediately after the first bait application, detection rates declined dramatically, from 9.6 to zero detections/camera per day on Day 4 post-baiting. From 1 week post-baiting, mouse detections were extremely rare on both cameras with and without lures. Our last mouse record, 27 days after the first bait application, may be related to initial rapid bait disappearance. Opportunistic camera traps first detected surviving mice 6 months after the first bait drop.
Conclusions: The rapid decline in detections suggests that most mice consumed bait as soon as it became available, which is faster than what laboratory trials suggest. Future similar operations can expect that mouse activity will decline sharply within 1 week, although some mice may survive longer.
Implications: Documenting similar declines in mouse activity using cameras could inform operational decisions such as timing of a second bait application or non-target monitoring on future eradication projects. Cameras, particularly with attractive lures, are an effective addition to the mouse detection toolkit, and facilitated a timely confirmation of eradication outcome.
Keywords: absence confirmation, camera, detection devices, invasive rodents, monitoring, Mus musculus, restoration, scent lures.
References
Angel, A, Wanless, RM, and Cooper, J (2009). Review of impacts of the introduced house mouse on islands in the Southern Ocean: are mice equivalent to rats? Biological Invasions 11, 1743–1754.| Review of impacts of the introduced house mouse on islands in the Southern Ocean: are mice equivalent to rats?Crossref | GoogleScholarGoogle Scholar |
Benkwitt, CE, Gunn, RL, Le Corre, M, Carr, P, and Graham, NAJ (2021). Rat eradication restores nutrient subsidies from seabirds across terrestrial and marine ecosystems. Current Biology 31, 2704–2711.e4.
| Rat eradication restores nutrient subsidies from seabirds across terrestrial and marine ecosystems.Crossref | GoogleScholarGoogle Scholar |
Broome KG, Golding C, Brown KP, Horn S, Corson P, Bell P (2017a) Mouse eradication using aerial baiting: current agreed best practice used in New Zealand (version 1.0). (New Zealand Department of Conservation: Wellington, New Zealand)
Broome KG, Fairweather AAC, Fisher P (2017b) Brodifacoum pesticide information review. Version 2017/1. New Zealand Department of Conservation, Hamilton, New Zealand.
Broome K, Brown D, Brown K, Murphy E, Birmingham C, Golding C, Corson P, Cox A, Griffiths R (2019) House mice on islands: management and lessons from new zealand. In ‘Island Invasives: Scaling Up to Meet the Challenge’. (Eds CR Veitch, MN Clout, AR Martin, JC Russell, CJ West) pp. 100–107. (IUCN: Gland, Switzerland)
Caravaggi, A, Cuthbert, RJ, Ryan, PG, Cooper, J, and Bond, AL (2019). The impacts of introduced house mice on the breeding success of nesting seabirds on Gough Island. Ibis 161, 648–661.
| The impacts of introduced house mice on the breeding success of nesting seabirds on Gough Island.Crossref | GoogleScholarGoogle Scholar |
Cuthbert, RJ, Visser, P, Louw, H, and Ryan, PG (2011a). Palatability and efficacy of rodent baits for eradicating house mice (Mus musculus) from Gough Island, Tristan da Cunha. Wildlife Research 38, 196–203.
| Palatability and efficacy of rodent baits for eradicating house mice (Mus musculus) from Gough Island, Tristan da Cunha.Crossref | GoogleScholarGoogle Scholar |
Cuthbert R, Visser P, Louw H, Rexer-Huber K, Parker G, Ryan P (2011b) Preparations for the eradication of mice from Gough Island: results of bait acceptance trials above ground and around cave systems. In ‘Island Invasives: Eradication and Management’. (Ed. CR Veitch, MN Clout, DR Towns) pp. 47–50. (IUCN: Gland, Switzerland)
Cuthbert, RJ, Wanless, RM, Angel, A, Burle, M-H, Hilton, GM, Louw, H, Visser, P, Wilson, JW, and Ryan, PG (2016). Drivers of predatory behavior and extreme size in house mice Mus musculus on Gough Island. Journal of Mammalogy 97, 533–544.
| Drivers of predatory behavior and extreme size in house mice Mus musculus on Gough Island.Crossref | GoogleScholarGoogle Scholar |
Daltry, JC, and Bell, EA (2018). Can brodifacoum save endangered species? Recent experiences from the West Indies. Outlooks on Pest Management 29, 80–85.
| Can brodifacoum save endangered species? Recent experiences from the West Indies.Crossref | GoogleScholarGoogle Scholar |
Dilley, BJ, Davies, D, Bond, AL, and Ryan, PG (2015). Effects of mouse predation on burrowing petrel chicks at Gough Island. Antarctic Science 27, 543–553.
| Effects of mouse predation on burrowing petrel chicks at Gough Island.Crossref | GoogleScholarGoogle Scholar |
Dundas, SJ, Ruthrof, KX, Hardy, GESJ, and Fleming, PA (2019). Pits or pictures: a comparative study of camera traps and pitfall trapping to survey small mammals and reptiles. Wildlife Research 46, 104–113.
| Pits or pictures: a comparative study of camera traps and pitfall trapping to survey small mammals and reptiles.Crossref | GoogleScholarGoogle Scholar |
Glen, AS, Cockburn, S, Nichols, M, Ekanayake, J, and Warburton, B (2013). Optimising camera traps for monitoring small mammals. PLoS ONE 8, e67940.
| Optimising camera traps for monitoring small mammals.Crossref | GoogleScholarGoogle Scholar |
Hobbs, MT, and Brehme, CS (2017). An improved camera trap for amphibians, reptiles, small mammals, and large invertebrates. PLoS ONE 12, e0185026.
| An improved camera trap for amphibians, reptiles, small mammals, and large invertebrates.Crossref | GoogleScholarGoogle Scholar |
Holinda, D, Burgar, JM, and Burton, AC (2020). Effects of scent lure on camera trap detections vary across mammalian predator and prey species. PLoS ONE 15, e0229055.
| Effects of scent lure on camera trap detections vary across mammalian predator and prey species.Crossref | GoogleScholarGoogle Scholar |
Howald, G, Donlan, CJ, Galván, JP, Russell, JC, Parkes, J, Samaniego, A, Wang, Y, Veitch, D, Genovesi, P, Pascal, M, Saunders, A, and Tershy, B (2007). Invasive rodent eradication on islands. Conservation Biology 21, 1258–1268.
| Invasive rodent eradication on islands.Crossref | GoogleScholarGoogle Scholar |
Jones, AG, Chown, SL, and Gaston, KJ (2003). Introduced house mice as a conservation concern on Gough Island. Biodiversity and Conservation 12, 2107–2119.
| Introduced house mice as a conservation concern on Gough Island.Crossref | GoogleScholarGoogle Scholar |
Jones, HP, Holmes, ND, Butchart, SHM, Tershy, BR, Kappes, PJ, Corkery, I, Aguirre-Muñoz, A, Armstrong, DP, Bonnaud, E, Burbidge, AA, Campbell, K, Courchamp, F, Cowan, PE, Cuthbert, RJ, Ebbert, S, Genovesi, P, Howald, GR, Keitt, BS, Kress, SW, Miskelly, CM, Oppel, S, Poncet, S, Rauzon, MJ, Rocamora, G, Russell, JC, Samaniego-Herrera, A, Seddon, PJ, Spatz, DR, Towns, DR, and Croll, DA (2016). Invasive mammal eradication on islands results in substantial conservation gains. Proceedings of the National Academy of Sciences of the United States of America 113, 4033–4038.
| Invasive mammal eradication on islands results in substantial conservation gains.Crossref | GoogleScholarGoogle Scholar |
Jones, CW, Risi, MM, Cleeland, J, and Ryan, PG (2019). First evidence of mouse attacks on adult albatrosses and petrels breeding on Sub-antarctic Marion and Gough Islands. Polar Biology 42, 619–623.
| First evidence of mouse attacks on adult albatrosses and petrels breeding on Sub-antarctic Marion and Gough Islands.Crossref | GoogleScholarGoogle Scholar |
Jones, CW, Risi, MM, Osborne, AM, Ryan, PG, and Oppel, S (2021). Mouse eradication is required to prevent local extinction of an endangered seabird on an oceanic island. Animal Conservation 24, 637–645.
| Mouse eradication is required to prevent local extinction of an endangered seabird on an oceanic island.Crossref | GoogleScholarGoogle Scholar |
McClelland P (2021) ‘Gough island restoration programme: operational plan for the eradication of house mice from Gough Island, Tristan da Cunha.’ (Royal Society for the Protection of Birds: Sandy, UK)
Oppel, S, Bond, AL, Brooke, MdeL, Harrison, G, Vickery, JA, and Cuthbert, RJ (2016). Temporary captive population and rapid population recovery of an endemic flightless rail after a rodent eradication operation using aerially distributed poison bait. Biological Conservation 204, 442–448.
| Temporary captive population and rapid population recovery of an endemic flightless rail after a rodent eradication operation using aerially distributed poison bait.Crossref | GoogleScholarGoogle Scholar |
Rowe-Rowe, DT, and Crafford, JE (1992). Density, body size, and reproduction of feral house mice on Gough Island. South African Journal of Zoology 27, 1–5.
| Density, body size, and reproduction of feral house mice on Gough Island.Crossref | GoogleScholarGoogle Scholar |
Russell, JC, and Broome, KG (2016). Fifty years of rodent eradications in New Zealand: another decade of advances. New Zealand Journal of Ecology 40, 197–204.
| Fifty years of rodent eradications in New Zealand: another decade of advances.Crossref | GoogleScholarGoogle Scholar |
Russell, JC, Binnie, HR, Oh, J, Anderson, DP, and Samaniego, A (2017). Optimizing confirmation of invasive species eradication with rapid eradication assessment. Journal of Applied Ecology 54, 160–169.
| Optimizing confirmation of invasive species eradication with rapid eradication assessment.Crossref | GoogleScholarGoogle Scholar |
Samaniego, A, Aguirre-Muñoz, A, Bedolla-Guzmán, Y, Cárdenas-Tapia, A, Félix-Lizárraga, M, Méndez-Sánchez, F, Reina-Ponce, O, Rojas-Mayoral, E, and Torres-García, F (2018). Eradicating invasive rodents from wet and dry tropical islands in Mexico. Oryx 52, 559–570.
| Eradicating invasive rodents from wet and dry tropical islands in Mexico.Crossref | GoogleScholarGoogle Scholar |
Samaniego, A, Griffiths, R, Gronwald, M, Holmes, ND, Oppel, S, Stevenson, BC, and Russell, JC (2020a). Risks posed by rat reproduction and diet to eradications on tropical islands. Biological Invasions 22, 1365–1378.
| Risks posed by rat reproduction and diet to eradications on tropical islands.Crossref | GoogleScholarGoogle Scholar |
Samaniego, A, Griffiths, R, Gronwald, M, Murphy, F, Le Rohellec, M, Oppel, S, Meyer, J-Y, and Russell, JC (2020b). A successful pacific rat rattus exulans eradication on tropical Reiono Island (Tetiaroa Atoll, French Polynesia) despite low baiting rates. Conservation Evidence 17, 12–14.
Samaniego, A, Jolley, W, and McClelland, P (2022). A lesson for planning rodent eradications: interference of invasive slugs during the Gough Island mouse eradication attempt in 2021. Wildlife Research , .
| A lesson for planning rodent eradications: interference of invasive slugs during the Gough Island mouse eradication attempt in 2021.Crossref | GoogleScholarGoogle Scholar |
Stratton, JA, Nolte, MJ, and Payseur, BA (2021). Evolution of boldness and exploratory behavior in giant mice from Gough Island. Behavioral Ecology and Sociobiology 75, 65.
| Evolution of boldness and exploratory behavior in giant mice from Gough Island.Crossref | GoogleScholarGoogle Scholar |
Sweetapple, P, and Nugent, G (2011). Chew-track-cards: a multiple-species small mammal detection device. New Zealand Journal of Ecology 35, 153–162.
Thomas, MD, Brown, JA, and Henderson, RJ (1999). Feasibility of using wax blocks to measure rat and possum abundance in native forest. New Zealand Plant Protection 52, 125–129.
| Feasibility of using wax blocks to measure rat and possum abundance in native forest.Crossref | GoogleScholarGoogle Scholar |
Wace, NM (1961). The vegetation of Gough Island. Ecological Monographs 31, 337–367.
| The vegetation of Gough Island.Crossref | GoogleScholarGoogle Scholar |
Wanless, RM, Fisher, P, Cooper, J, Parkes, J, Ryan, PG, and Slabber, M (2008). Bait acceptance by house mice: an island field trial. Wildlife Research 35, 806–811.
| Bait acceptance by house mice: an island field trial.Crossref | GoogleScholarGoogle Scholar |
