The acceptability of three types of predator baits to captive non-target animals

Martin, Gary R.; Twigg, Laurie E.; Marlow, Nicky; Kirkpatrick, Winifred E.; Gaikhorst, Glen

doi:10.1071/wr01065

Cited by 17 publications

(24 citation statements)

References 42 publications

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“…Increased specificity is achieved either by deterring non-target species (Hickling 1997;Day & Matthews 1999;Hartley et al 2000;Martin et al 2002), by physically preventing them from reaching the lethal device/substance (e.g. McDonald et al 1999;Short & Reynolds 2001;Glen & Dickman 2003;Petel et al 2004), or by increasing bait attractiveness to the target species (e.g.…”

Section: Discussionmentioning

confidence: 99%

Rats dying for mice: Modelling the competitor release effect

Caut¹,

et al. 2007

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Introduced vertebrate predators are one of the most important threats to endemic species throughout a range of ecosystems, in particular on islands in biodiversity hot spots. Consequently, the reduction of predator numbers is considered a key conservation action in the management of many native vertebrates vulnerable to predators. It is now established that control attempts may affect non-target species through trophic interactions, but little is known concerning their consequences on competitive relationships. We study a mathematical model mimicking the effects of controlling introduced species in the presence of their competitors.We used two competing rodents to illustrate our study: black rats, Rattus rattus, and mice, Mus musculus. Analyses of the model show that control of only one introduced species logically results in the dramatic increase of the overlooked competitor. We present empirical data that confirm our theoretical predictions. Less intuitively, this process, which we term 'the competitor release effect', may also occur when both introduced competitors are simultaneously controlled. In our setting, controlling both predators can promote their coexistence. This occurs as soon as the inferior competitor benefits from the differential effect of the simultaneous control of both competitors, that is, when the indirect positive effect of control (the removal of their competitors) exceeds its direct negative effect (their own removal). Both control levels and target specificity have a direct influence on the extent of this process: counter-intuitively, the stronger and more specific the control, the greater the effect. The theoretical validation of the competitor release effect has important implications in conservation, especially for control management.

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Section: Discussionmentioning

confidence: 99%

Rats dying for mice: Modelling the competitor release effect

Caut¹,

et al. 2007

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“…Field trials allow critical assessment of the propensity of animals to take bait because they encounter bait under normal foraging conditions in the field (Glen et al 2007). Martin et al (2002) pointed out that the food consumption of free-ranging animals is greater than that of captive ones.…”

Section: Discussionmentioning

confidence: 99%

Grain, pellet and wax block bait take by the house mouse (Mus musculus) and non‐target species: implications for mouse eradications on coral cay islands

Cruz

Leung

Lisle

et al. 2008

Integrative Zoology

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Introduced rodents have been eradicated from large numbers of offshore islands using toxic baits; however, toxic baits have been linked with negative impacts on non-target species. The present study assessed the bait take of target (house mouse, Mus musculus) and non-target (buff banded rail, Rallus philippensis) animals on Northwest and Heron Islands in the Great Barrier Reef. Three non-toxic bait formulations (wax block, pellet and grain) were tested and each was applied at 1 kg ha -1 in six treatment grids. The tracks of animals visiting the baits were identified using 30 tracking stations per treatment grid. A tracking station consisted of a track-board placed in the centre of a sand-pad. Mean bait take differed significantly between the formulations: birds took more grain bait than wax block bait; mice took more wax block than grain bait. Both mice and birds were equally selective of pellet bait. Thus, the findings indicate that wax blocks are the most suitable formulation for future baiting programs to eradicate mice on these and other islands.

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“…The proportion of individuals theoretically consuming a lethal dose of 1080 was calculated using individual bait consumption and a species' minimum ALD. Minimum ALD for native animal species from Martin et al (2002) …”

Section: Eradicat ® Consumption By Trapped Feral Cats and Five Nativementioning

confidence: 99%

“…The possum has an ALD of 138 mg of 1080 and the woylie has a ALD of 116 mg of 1080 (Martin et al 2002). This means that either species would have to consume at least 20 baits or toxic pellets for them to be in any danger in Western Australia.…”

Section: Potential Risk To Native Animal Speciesmentioning

confidence: 99%

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Increasing the target-specificity of ERADICAT® for feral cat (Felis catus) control by encapsulating a toxicant

Hetherington

Algar²,

Mills

et al. 2007

Wildl. Res.

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ERADICAT ® , a sausage-type meat bait, has been developed for use in managing feral cat (Felis catus) populations throughout Western Australia. However, concern about potential exposure of non-target species to bait-delivered toxicants has led to the development of a technique to more specifically target feral cats using a pellet. Research into the consumption, by cats and native animals, of toxic pellets implanted within the ERADICAT® bait has been simulated using ball bearings as a substitute pellet. Results from our work indicate that encapsulating the toxicant may pose less risk of poisoning to chuditch (Dasyurus geoffroii), woylies (Bettongia pencillata) and southern brown bandicoots (Isoodon obesulus) as they consumed significantly fewer ball bearings (P = 0.003, <0.001, <0.001) than semi-feral cats (P = 0.07). Theoretically, a toxic pellet will not reduce the effectiveness of the ERADICAT ® bait as there was no significant difference between consumption of baits and the consumption of ball bearings in feral cats (P = 0.07). Therefore, baits containing a toxic pellet have the potential to be a more selective method to control feral cats.

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The acceptability of three types of predator baits to captive non-target animals

Cited by 17 publications

References 42 publications

Rats dying for mice: Modelling the competitor release effect

Rats dying for mice: Modelling the competitor release effect

Grain, pellet and wax block bait take by the house mouse (Mus musculus) and non‐target species: implications for mouse eradications on coral cay islands

Increasing the target-specificity of ERADICAT® for feral cat (Felis catus) control by encapsulating a toxicant

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