Assessment of the M-44 ejector for the delivery of 1080 for red fox (Vulpes vulpes) control

1999 ◽  
Vol 26 (1) ◽  
pp. 101 ◽  
Author(s):  
Clive A. Marks ◽  
Frank Busana ◽  
Frank Gigliotti
Keyword(s):  
Vulpes Vulpes ◽  
Red Fox ◽  
Lethal Dose ◽  
Target Specificity ◽  
Target Species ◽  
Margin Of Safety

The M-44 ejector delivered a reliable lethal dose of 1080 (sodium monofluoroacetate) to captive foxes, with a capsule dose of 2.0 mg of 1080, if a ‘collar’ modification was used. Behavioural observations indicated that the collar influenced the orientation of the fox’s mouth to the M-44 bait upon activation, resulting in a much greater amount of 1080 entering its mouth. This dose is below the 3 mg currently used in fox baits in Victoria and may increase the margin of safety for non-target species during 1080 baiting programs. The authors discuss some of the potential advantages of the ejector over the use of meat baits, such as the elimination of bait caching and improved target specificity. The potential for the M-44 to deliver an even lower lethal dose of 1080, which is closer to the reported theoretical bait LD100 of 1.25 mg for this species, may further reduce the risk of 1080 baiting to non-target species such as tiger quolls.

The distribution of sodium fluoroacetate within 1080 egg-baits used for canid control

2007 ◽  
Vol 34 (3) ◽  
pp. 234
Author(s):  
Laurie E. Twigg ◽  
Win E. Kirkpatrick ◽  
Tim J. Lowe
Keyword(s):  
Potential Risk ◽  
Vulpes Vulpes ◽  
Lethal Dose ◽  
Target Species ◽  
Operator Error ◽  
Diffusion Pattern ◽  
Rapid Diffusion ◽  
Low Levels ◽  
To Receive ◽  
Nominal Amount

Egg-baits prepared by the insertion of a 1080 (sodium fluoroacetate)-treated rhodamine-dyed oat-grain into each egg are used for controlling foxes (Vulpes vulpes) in Australia. However, the diffusion pattern of 1080 from the inserted oat into the egg and the distribution of 1080 within the egg are unknown. As both factors will influence whether the target species needs to consume the oat to receive a lethal dose, and also the withholding period required before the baits can be laid, we examined the rate of diffusion and the ultimate distribution of 1080 within these baits. Rhodamine oats containing 4.5 mg of 1080 were inserted into the white of intact eggs, or into eggs where the white and yolk was mixed (scrambled). 1080 rapidly dispersed into the eggs (but not the yolk of intact eggs) irrespective of which technique was used: 72–88% (3.22–3.96 mg 1080) of the recovered 1080 was found in the scrambled egg fraction or in the egg-whites within 1–2 h. Most of the remaining 1080 was found in the rhodamine oats, with the yolks containing only 2–8% of the nominal amount. The rapid diffusion of 1080 into the egg fraction, together with the very low levels of 1080 remaining in the rhodamine oats, indicate that: (1) target species such as foxes would not need to consume the oat to ingest a lethal dose, (2) providing a 2–3 h withholding period is allowed before baits are laid, any rhodamine oats not ingested would contain minimal amounts of 1080 and therefore pose little potential risk to non-target species, and (3) foxes would not need to ingest an entire egg-bait to receive a lethal dose. However, in preparing these baits, we recommend that the eggs be scrambled before the insertion of the rhodamine oats (to reduce the potential for operator error) and that a 2–3-h withholding period be allowed (to ensure that most 1080 is within the egg fraction) before these baits can be consumed by foxes or other target species.

Increasing the target-specificity of the M-44 ejector by exploiting differences in head morphology between foxes and large dasyurids

2005 ◽  
Vol 32 (8) ◽  
pp. 733 ◽  
Author(s):  
Evelyn Nicholson ◽  
Frank Gigliotti
Keyword(s):  
Vulpes Vulpes ◽  
Tasmanian Devil ◽  
Target Specificity ◽  
Target Species ◽  
Red Foxes ◽  
Lethal Control ◽  
Wide Range ◽  
Head Morphology ◽  
Pulling Force ◽  
Sarcophilus Harrisii

The M-44 ejector (ejector) is a more target-specific means of lethal control of red foxes (Vulpes vulpes) than conventional meat baits, which may expose a wide range of non-target species to the bait toxicant. Owing to the threshold pulling force required to activate the ejector, undesired exposure is eliminated in many smaller animals that cannot generate this force. However, the spotted-tailed quoll (Dasyurus maculatus) and the Tasmanian devil (Sarcophilus harrisii) remain potential non-target species because of their larger size. In this study, we report on the development of a collar that excludes devils and quolls by exploiting differences in their head morphology relative to that of red foxes. The collar potentially prevents bait removal by larger non-target species, while still allowing all adult foxes access to the bait to trigger the ejector mechanism. Spotted-tailed quolls small enough to access the bait are theoretically too small to trigger the ejector mechanism set at a threshold pulling force of 2.7 kg.

Primary osteoblast culture from red fox (Vulpes Vulpes)

2016 ◽  
Author(s):  
Ines Pedro Perpetuo ◽  
Alessandro Felder ◽  
Andrew Pitsillides ◽  
Michael Doube ◽  
Isabel Orriss
Keyword(s):  
Vulpes Vulpes ◽  
Red Fox ◽  
Primary Osteoblast ◽  
Osteoblast Culture

Diet of the introduced red fox Vulpes vulpes in Australia: analysis of temporal and spatial patterns

Mammal Review ◽  
2021 ◽  
Author(s):  
Patricia A. Fleming ◽  
Heather M. Crawford ◽  
Alyson M. Stobo‐Wilson ◽  
Stuart J. Dawson ◽  
Christopher R. Dickman ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Vulpes Vulpes ◽  
Red Fox ◽  
Temporal And Spatial Patterns ◽  
Temporal And Spatial

The Red Fox (Vulpes vulpes ) as an Accumulator of Bones in Cave-like Environments

2012 ◽  
Vol 24 (4) ◽  
pp. 459-475 ◽  
Author(s):  
Magdalena Krajcarz ◽  
Maciej Tomasz Krajcarz
Keyword(s):  
Vulpes Vulpes ◽  
Red Fox

Home Range Defense in the Red Fox, Vulpes vulpes L.

1975 ◽  
Vol 56 (3) ◽  
pp. 645-652 ◽  
Author(s):  
E. M. Preston
Keyword(s):  
Home Range ◽  
Vulpes Vulpes ◽  
Red Fox

Variation in fur farm and wild populations of the red fox, Vulpes vulpes (Carnivora: Canidae) — Part I: Morphometry

2016 ◽  
Vol 96 (4) ◽  
pp. 589-597 ◽  
Author(s):  
Magdalena Zatoń-Dobrowolska ◽  
Magdalena Moska ◽  
Anna Mucha ◽  
Heliodor Wierzbicki ◽  
Piotr Przysiecki ◽  
...  
Keyword(s):  
Vulpes Vulpes ◽  
Selective Breeding ◽  
Red Fox ◽  
Tail Length ◽  
Morphometric Traits ◽  
Red Foxes ◽  
Ear Height ◽  
Morphological Differences ◽  
The Right ◽  
Almost All

This paper demonstrates the influence of artificial selection on morphometric traits in the red fox [Vulpes vulpes (Linnaeus, 1758)]. Measurements and two proportion coefficients were analysed in 132 wild and 199 farm red foxes. The two groups differed significantly (P ≤ 0.05) on all but one of the measurements. Eight out of 11 measurements were significantly greater in the farm fox population, while only tail length, ear height, and length of the right hind limb were greater in the population of wild foxes. The opposite trend was observed when analysing variation in the measurements — the farm foxes were characterized by a greater variability only in the case of body weight, body length, and breadth of chest. When analysing the sexual dimorphism index in different sex and population groups, in almost all analysed traits, the greatest differences occurred between farm males and wild females. All of the traits examined in this study are important for survival of wild foxes. However, because importance of some traits was reduced during domestication and selective breeding (farm foxes do not have to fight for survival), the genetic relationship between them may have weakened. Other possible causes of morphological differences between the studied groups of red foxes are discussed as well.

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