Use of Rhodamine B as a systemic bait marker for feral cats (Felis catus)

Fisher, Penny; Algar, Dave; Sinagra, J.

doi:10.1071/wr98041

Cited by 30 publications

(37 citation statements)

References 9 publications

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“…Facial whiskers (mystacial vibrissae) of the stoats were sampled because they were more likely to be growing at any one time than other hair types (Chase 1954;Fisher 1995Fisher , 1998Fisher , 1999. Stoats have c. 20 whiskers on each side of the face.…”

Section: Methodsmentioning

confidence: 99%

“…For example, 0.5% RB marked the fore-paws and mouth of brushtail possums (Trichosurus vulpecula) for 7 days (Morgan 1981), and 1% RB marked the mouth of ferrets for only 3 days (Ogilvie & Eason 1998). However, ingested RB becomes incorporated into the structure of growing hair, appearing as a fluorescent band detectable under a fluorescent-light microscope (Savarie et al 1992;Fisher 1998Fisher ,1999. It has been detected in the hair of a range of species including coyotes (Canis latrans), mountain beavers (Aplodontia rufa), cats (Felis catus), Norway rats (Rattus norvegicus), and house mice (Mus domesticus) (Johns & Pan 1981;Lindsey 1983;Knowlton et al 1987;Fisher 1995Fisher , 1998Fisher , 1999Fisher et al 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Rhodamine B (RB) is both an external and systemic marker that can be detected in live animals (Savarie et al 1992;Fisher 1998Fisher , 1999. As an external marker, it generally lasts only a few days.…”

Section: Introductionmentioning

confidence: 99%

“…However, ingested RB becomes incorporated into the structure of growing hair, appearing as a fluorescent band detectable under a fluorescent-light microscope (Savarie et al 1992;Fisher 1998Fisher ,1999. It has been detected in the hair of a range of species including coyotes (Canis latrans), mountain beavers (Aplodontia rufa), cats (Felis catus), Norway rats (Rattus norvegicus), and house mice (Mus domesticus) (Johns & Pan 1981;Lindsey 1983;Knowlton et al 1987;Fisher 1995Fisher , 1998Fisher , 1999Fisher et al 1999). The persistence of the marking depends upon the rate of hair growth, lasting for at least 2 months in Norway rats (Fisher 1995), and for up to 6 months in coyotes (Johns & Pan 1981) and mountain beavers (Lindsey 1983).…”

Section: Introductionmentioning

confidence: 99%

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Rhodamine B as a systemic hair marker for assessment of bait acceptance by stoats(Mustela erminea)

Spurr¹

2002

New Zealand Journal of Zoology

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Rhodamine B (RB) is a dye that becomes incorporated into the structure of growing hair of animals that ingest it, appearing as an orange-red fluorescent band detectable under a fluorescent-light microscope. This marker was evaluated as a means of assessing bait acceptance by stoats (Mustela erminea L.). Eleven wild-caught captive stoats were each fed a broken hen egg injected with 25 mg of RB on two occasions, 5 weeks apart. This was equivalent to 62-108 mg kg -1 , depending upon stoat weight, on each occasion. At least three facial whiskers were collected from each dosed stoat on each of two sampling dates (giving a total of at least six whiskers from each stoat). The sampling dates varied from 1 to 17 weeks after first dosing. Whiskers were also collected from one of the dosed stoats that died of other causes 19 weeks after first dosing, and from four stoats not dosed with RB. All 11 of the stoats fed RB had at least one fluorescent band in at least one of the sampled whiskers. None of the four stoats not fed RB had fluorescent bands in their whiskers. The marking persisted in all dosed stoats for at least 6 weeks, and in one dosed stoat for at least 19 weeks after dosing. However, only 56% of the 91 whiskers inspected from the dosed stoats had fluorescent bands, and only 9% of the whiskers had two fluorescent bands, representing the two doses of RB. The distance between the two fluorescent bands indicated a mean whisker growth of 0.6 mm day -1 . The distance from the base of the whiskers to the base of the fluorescent bands was broadly related to the time after ingestion of bait containing RB. However, the variation was too great for distance along the whisker to be reliably used as a quantitative measure of time after bait ingestion. The technique can be used to assess bait acceptance in the field provided all stoats are sampled within c. 4-6 weeks of baiting, and at least 6-9 whiskers are sampled from each stoat.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rhodamine B as a systemic hair marker for assessment of bait acceptance by stoats(Mustela erminea)

Spurr¹

2002

New Zealand Journal of Zoology

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“…Fluorescent marking was detected in the vibrissae of all of 18 feral house cats tested using ultra-violet microscopy 10 days after dosage with rhodamine B-soaked bait (Fisher et al 1999). Ogilvie & Eason (1998) fed six ferrets on bait soaked in 1% aqueous rhodamine B solution.…”

Section: Chemical and Dye Markersmentioning

confidence: 99%

A review of potential techniques for identifying individual stoats (Mustela erminea) visiting control or monitoring stations

Jones

Møller²,

Hamilton³

2004

New Zealand Journal of Zoology

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We review ways of individually identifying stoats (Mustela erminea) and similar small mammals from visits to bait stations or to monitoring devices in the field. Tracking devices are the cheapest and most practical method currently available of measuring the presence of a particular species, but there has been little research on the recognition of individuals. Elongation of tracking tunnels, or using sooty plates rather than ink to record prints, may improve detectability of individual markings. Recording visits to bait stations or tracking tunnels from DNA sequencing of hair or skin samples is likely to be prohibitively expensive for many monitoring programmes. Identification of stoats visiting bait stations or tracking tunnels using electronic devices has great potential, but these techniques are impracticably expensive because stoats move over such large areas that individual receivers and data loggers would be needed for each bait station. Chemical bait markers such as rhodamine B may be the most suitable method for identifying which animals have used a particular bait station.

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2014

Free‐Ranging Cats

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Use of Rhodamine B as a systemic bait marker for feral cats (Felis catus)

Cited by 30 publications

References 9 publications

Rhodamine B as a systemic hair marker for assessment of bait acceptance by stoats(Mustela erminea)

Rhodamine B as a systemic hair marker for assessment of bait acceptance by stoats(Mustela erminea)

A review of potential techniques for identifying individual stoats (Mustela erminea) visiting control or monitoring stations

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