A Field Trial Evaluating Bait Uptake by an Urban Fox (Vulpes vulpes) Population

Trewhella, W. J.; Harris, Stephen; Smith, Graham C.; Nadian, Allan K.

doi:10.2307/2404561

Cited by 57 publications

(76 citation statements)

References 23 publications

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“…However, few studies have evaluated the effectiveness of baiting campaigns in reaching different age and sex classes of a population. A study in the city of Bristol found that 2.1 times as many adults as cubs took baits in May/June, and 1.2 times as many adults as subadults in November/December (Trewhella et al 1991). This study suggests that the difficulty in reaching juvenile foxes in baiting campaigns is likely to be due to their reduced ranging behaviour and the concentration of their activity at secure sites, behaviour which appears to be typical of the canids.…”

Section: Discussionmentioning

confidence: 73%

“…Woollard and Harris (1990) have also shown that during the dispersal period the movement patterns of subadult males that dispersed and those that did not are very similar in terms of home range area, core area size, speeds of movement and duration of activity. This was reflected in the study of Trewhella et al (1991) who achieved similar bait uptake rates for adults and subadults. However, these rates (29% and 23% respectively) were considerably lower than the 80% estimated as necessary to control a rabies outbreak .…”

Section: Discussionmentioning

confidence: 74%

“…The successful distribution and uptake of these baits will be dependent upon patterns of range and habitat use by the target population (eg Doncaster andMacdonald 1997, Saunders et al 1997). However, in one trial the uptake rate of these baits was far below that required for effective control, particularly for juveniles (Trewhella et al 1991).…”

Section: Introductionmentioning

confidence: 94%

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Ranging behaviour of juvenile red foxes and its implications for management

Robertson

Baker

Harris³

2000

Acta Theriol.

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S. 2000. Ranging behaviour of juvenile red foxes and its implications for management. Acta Theriologica 45: 525-535.The diurnal and nocturnal movement patterns of juvenile foxes Vulpes vulpes (Linneaus, 1758) were investigated in Bristol, UK. Juvenile and adult foxes were radio-tracked between May and December in three consecutive years. In the months preceding the main dispersal period (May-September), cubs showed a gradual increase in the area over which they ranged, and this was reflected both in the use of diurnal lying-up sites and nocturnal patterns of movement. However, their behaviour was highly focused at secure den sites and rendezvous sites. There was no significant difference in the movement patterns of male and female cubs. By the end of August, the nocturnal movement patterns of cubs were comparable with resident adult animals with the exception of their average speed of travel. During the onset of the main dispersal period (October-December) subadults showed the same movement patterns as adults. These results are discussed within the context of fox management by the distribution of baits. It is proposed that the low bait uptake rate of juveniles is associated with their limited ranging behaviour as cubs, and with differences in patterns of range utilisation as subadults.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 94%

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Ranging behaviour of juvenile red foxes and its implications for management

Robertson

Baker

Harris³

2000

Acta Theriol.

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“…A number of studies have used chemical biomarkers to monitor bait uptake for orally delivered vaccines and poisons (Morgan 1982;Trewhella et al 1991). When incorporated into bait, such markers may allow the identification of individuals that have consumed bait through examination of either body fluids or tissues.…”

Section: Introductionmentioning

confidence: 99%

Evaluating seasonal bait delivery to badgers using rhodamine B

et al. 2010

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“…Only one fox took the bait on the six occasions when the bait was still present. The rate of bait uptake by target species can be influenced also by other factors, including habitat type (Trewhella et al 1991;Carter and Luck 2013), season (Woodford et al 2012), bait type (van Polanen Petel et al 2001) and the availability of alternative food sources (Roberts et al 2006;Moseby et al 2011). Therefore, if foxes are likely to take only a small proportion of presented baits under most circumstances, the reduction in the number of baits available owing to non-target bait take becomes a significant problem.…”

Section: ; Woodford Et Al 2012)mentioning

confidence: 99%

First in, first served: uptake of 1080 poison fox baits in south-west Western Australia

Dundas¹,

Adams²,

Fleming³

2014

Wildl. Res.

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Context: In Western Australia, baits containing 1080 poison are widely used to control the red fox (Vulpes vulpes) for fauna conservation. Despite long-term (15-17 years) baiting programs, bait uptake by target and non-target species is largely unknown, but affects baiting efficacy. Aims:We examined bait uptake of 1080-poisoned fox baits laid according to current practice at seven riparian sites in the northern jarrah forest (of south-west Western Australia). There, intensive baiting regimes have been implemented for the protection of quokka (Setonix brachyurus) populations.Methods: Over 9 months, 299 Probait ® baits were monitored regularly to determine their persistence, and, at 142 of these, Reconyx HC500 remote cameras were used to identify the species taking baits.To compare bait uptake with species presence at these sites, we calculated an activity index for each species from the number of passes of animals in front of the cameras.Key results: The species taking baits was identified for 100 of the baits monitored with cameras, and, because of multiple species taking baits, 130 bait take incidents were recorded in total. The fate of 40 of the baits was not discernible and two baits were not removed. In all, 99% of baits monitored by cameras were taken by non-target species and quokkas took 48% of them. The majority of baits (62% of the total 299 monitored) were taken before or on the first night of deployment, and 95% of baits had been taken within 7 days. With the exception of feral pigs, which took more baits than predicted from their activity index at these sites, baits were taken in proportion to the activity index of species.Foxes were present at four of the seven sites, but only one fox was observed taking a bait. Conclusions:The high level of uptake of baits by non-target animals reflects their diversity and abundance at these sites, but also significantly reduces the availability of baits to control foxes.Implications: Strategies to reduce non-target bait uptake and increase bait availability for foxes are required.

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A Field Trial Evaluating Bait Uptake by an Urban Fox (Vulpes vulpes) Population

Cited by 57 publications

References 23 publications

Ranging behaviour of juvenile red foxes and its implications for management

Ranging behaviour of juvenile red foxes and its implications for management

Evaluating seasonal bait delivery to badgers using rhodamine B

First in, first served: uptake of 1080 poison fox baits in south-west Western Australia

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