Effect of a synthetic lure on site visitation and bait uptake by foxes (Vulpes vulpes) and wild dogs (Canis lupus dingo, Canis lupus familiaris)

2007 ◽  
Vol 34 (6) ◽  
pp. 461 ◽  
Author(s):  
Rob J. Hunt ◽  
David J. Dall ◽  
Steven J. Lapidge
Keyword(s):  
Canis Lupus ◽  
Vulpes Vulpes ◽  
Field Application ◽  
Canis Lupus Familiaris ◽  
Bait Stations ◽  
Wild Dogs

Application of synthetic fermented egg (SFE), via aerosol, to the surface of bait stations increased site visitation by wild dogs and foxes when compared with the use of buried baits alone. An associated increase in bait uptake by foxes at SFE-treated bait stations was observed when compared with bait uptake at untreated stations, although this effect diminished with time, possibly due to the use of non-lethal baits leading to the discovery of all bait stations and the habituation of animals to sites of reward. Bait uptake by wild dogs, although limited, occurred only at stations treated with SFE. Use of an aerosol based form of SFE allowed an ease of field application not previously associated with the use of synthetic lures.

Diet analysis of mammals, raptors and reptiles in a complex predator assemblage in the Blue Mountains, eastern Australia

2011 ◽  
Vol 59 (5) ◽  
pp. 295 ◽  
Author(s):  
Jack H. Pascoe ◽  
Robert C. Mulley ◽  
Ricky Spencer ◽  
Rosalie Chapple
Keyword(s):  
Field Study ◽  
Canis Lupus ◽  
Vulpes Vulpes ◽  
Diet Overlap ◽  
Diet Analysis ◽  
Critical Weight ◽  
Blue Mountains ◽  
Eastern Australia ◽  
High Level ◽  
Wild Dogs

South-east Australia has a complex predator assemblage which has historically been vulnerable to introduced species. This is the first Australian field study to analyse samples from members of the families Canidae, Dasyuridae, Strigidae, and Varanidae to describe the diet and diet overlap between these predators. Samples were collected opportunistically and hair and bone analysis was used to identify the content of samples. Wild dogs (Canis lupus) and lace monitors (Varanus varius) predominantly consumed large mammalian prey, which contributed to the high level of diet overlap (Ojk = 0.79) between these two species. Foxes (Vulpes vulpes) and spotted-tailed quolls (Dasyurus maculatus) also had a high level of diet overlap (Ojk = 0.76), a result of their diets containing a high proportion of medium-sized mammals. The diet of wild dogs and foxes showed moderate overlap (Ojk = 0.59), and foxes were more likely to prey on species within the critical weight range than on macropods, which made up a high proportion of the diet of wild dogs. These data confirm that significant diet overlap can occur between predators from different taxonomic classes and further investigation of potential competition will be important to ongoing management.

Movements and habitat selection by wild dogs in eastern Victoria

2010 ◽  
Vol 32 (1) ◽  
pp. 23 ◽  
Author(s):  
Alan Robley ◽  
Andrew Gormley ◽  
David M. Forsyth ◽  
Alan N. Wilton ◽  
Danielle Stephens
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Global Positioning System ◽  
Canis Lupus ◽  
Home Ranges ◽  
Canis Lupus Familiaris ◽  
Eastern Australia ◽  
Global Positioning ◽  
Wild Dog ◽  
Wild Dogs

To investigate movements and habitat selection by wild dogs we attached satellite-linked global positioning system (GPS) units to nine wild dogs (Canis lupus dingo and Canis lupus familiaris) captured in eastern Victoria in summer 2007. Units estimated locations at 30-min intervals for the first six months and then at 480-min intervals for six more months. DNA testing revealed all these wild dogs to be related. Home ranges of males were almost three times larger than those of females (males: 124.3 km2 ± 56.3, n = 4; females: 45.2 km2 ± 17.3, n = 5) and both sexes preferred subalpine grassland, shrub or woodland at the landscape and home-range scales. Wild dogs were recorded more often than expected within 25 m of roads and less often than expected within 25 m of watercourses. Wild dogs displayed higher-velocity movements with shallow turning angles (generally forwards) that connected spatial and temporal clusters comprising slower-velocity, shorter, and sharper turning movements. One wild dog travelled 230 km in 9 days before returning to its home range and another travelled 105 km in 87 days. The home-range sizes reported in this study are much larger than previously reported in south-eastern Australia. This finding, together with previous studies, suggests that the spatial scale at which wild dog management occurs needs to be reconsidered.

The good, the bad, and the ugly: space use and intraguild interactions among three opportunistic predators—cat (Felis catus), dog (Canis lupus familiaris), and red fox (Vulpes vulpes)—under human pressure

2012 ◽  
Vol 90 (12) ◽  
pp. 1402-1413 ◽  
Author(s):  
D. Krauze-Gryz ◽  
J.B. Gryz ◽  
J. Goszczyński ◽  
P. Chylarecki ◽  
M. ̇Zmihorski
Keyword(s):  
Canis Lupus ◽  
Vulpes Vulpes ◽  
Red Fox ◽  
Space Use ◽  
Felis Catus ◽  
Probability Of Detection ◽  
The Other ◽  
Canis Lupus Familiaris ◽  
Modeling Framework ◽  
Intraguild Interactions

Examples of interspecific interactions have been described for mammalian predators, but less is known regarding disturbances of native predator guilds by domestic predators. We investigated intraguild interactions among three opportunistic predators (dog ( Canis lupus familiaris L., 1758), cat ( Felis catus L., 1758), and red fox ( Vulpes vulpes (L., 1758)) co-occurring in the extensive farmlands of central Poland. Their space use was monitored using tracking stations distributed in field and forest plots along a distance gradient from buildings and analyzed using the occupancy-modeling framework. For all three species occupancy decreased with increased distance from buildings, although for the fox the pattern was relatively weak. The occurrence of cats at the stations was higher in the forest than in the field; for fox and dog, there was a strong variation between study plots. For all three predators, the probability of detection was higher during the night than during the day and varied between the seasons; however, the exact patterns were species-specific. The presence of one predator was also linked to the presence of the other two species—generally, a given species was detected more frequently in the absence of the other two species. We recorded spatiotemporal niche segregation among the three species. We conclude that interspecific antagonistic interactions and differences in foraging ecology are the main drivers shaping co-occurrence of the three species in the agriculture landscape.

Computertomografische Morphologie des Ellbogengelenks und Vorkommen der Ellbogengelenkdysplasie beim Rotfuchs (Vulpes vulpes)

2020 ◽  
Vol 48 (03) ◽  
pp. 176-185
Author(s):  
Lena M. Holbein ◽  
Kerstin H. von Pückler ◽  
Martin Kramer ◽  
Klaus Failing ◽  
Markus Kirsch
Keyword(s):  
Canis Lupus ◽  
Vulpes Vulpes ◽  
Sich Eine ◽  
Canis Lupus Familiaris ◽  
Klinische Relevanz ◽  
Processus Coronoideus ◽  
Pathologische Veränderungen

Zusammenfassung Gegenstand und Ziel Die Ellbogengelenkdysplasie (ED) ist eine genetisch bedingte Entwicklungsstörung des kaninen Ellbogengelenks und eine häufige Lahmheitsursache der Vordergliedmaße des Haushundes (Canis lupus familiaris). Sie tritt überwiegend bei großen und mittelgroßen Rassehunden auf, wurde aber auch bei Mischlingshunden und Hunden kleinerer Rassen beschrieben. Angaben zu einem Vorkommen der ED bei Wildtieren fehlen in der Literatur. Ziel dieser Studie war, einen Überblick über die Anatomie des Ellbogengelenks des Rotfuchses (Vulpes vulpes) und das Vorkommen der ED bei dieser Spezies zu erlangen. Die spezielle Konformation des Ellbogengelenks beim Rotfuchs kann im direkten Vergleich mit der unserer Haushunde dabei helfen, mehr Erkenntnisse über den Einfluss der Anatomie auf die Entwicklung der ED zu gewinnen. Material und Methoden Insgesamt 94 Ellbogengelenke von 49 Rotfüchsen wurden computertomografisch untersucht und mit kaninen Ellbogengelenken verglichen. Ergebnisse Abgesehen von der Größendifferenz sowie geringgradigen artspezifischen Unterschieden zeigte sich eine große Ähnlichkeit der anatomischen Strukturen der Ellbogengelenke der Rotfüchse und Haushunde. Überproportional häufig wurde beim Rotfuchs eine runde Konformation des Koronoids festgestellt. Zwei Ellbogengelenke von 2 Rotfüchsen wiesen pathologische Veränderungen des Processus coronoideus medialis ulnae auf. Schlussfolgerung Die mit 2,1 % ermittelte Prävalenz pathologischer Veränderungen des Koronoids beim Rotfuchs ist vergleichbar mit der Prävalenz der ED bei kleinen Hunderassen. Das überproportional häufige Auftreten der runden Konformation des Koronoids beim Rotfuchs führt zu der Hypothese, dass die runde Konformation die physiologische und ursprüngliche Konformation sein könnte. Selektives Züchten auf solch ein morphologisches Merkmal kann ein Ansatz sein, die Verbreitung der ED zu verringern. Klinische Relevanz Der Einfluss der Anatomie auf die Entstehung pathologischer Veränderungen des Koronoids ist weiterhin unklar, sodass der Fokus bei der Suche nach der Ätiopathogenese, neben der Berücksichtigung der Anatomie des Ellbogengelenks, auf weiteren Faktoren (z. B. die Biomechanik, Genetik und Umweltfaktoren) liegen muss.

The immediate impact of 1080 aerial baiting to control wild dogs on a spotted-tailed quoll population

2005 ◽  
Vol 32 (8) ◽  
pp. 673 ◽  
Author(s):  
Gerhard Körtner ◽  
Peter Watson
Keyword(s):  
Rhodamine B ◽  
Canis Lupus ◽  
Canis Lupus Familiaris ◽  
Eastern Australia ◽  
Before And After ◽  
Wild Dog ◽  
Control Association ◽  
Wild Dogs ◽  
The Impact ◽  
Track Counts

In eastern Australia, the spotted-tailed quoll (Dasyurus maculatus) is the species thought to be most likely at risk from aerial baiting with compound 1080 to control wild dogs (Canis lupus familiaris and C. l. dingo). Although it is known that quolls occasionally die of 1080 poisoning, the broader impact on populations remains unresolved. We therefore assessed the impact of a regular aerial baiting campaign on a population of spotted-tailed quolls. Baiting with 1080 meat baits was conducted by the local Wild Dog Control Association and followed the same procedure as in previous years with the exception that the biomarker, rhodamine B, was added to the baits. Prior to the baiting, 36 quolls were trapped and fitted with mortality radio-collars; 31 of these collars were still functional at the time of baiting. Quolls were monitored from a helicopter and on the ground until retrapped 5–9 weeks after baiting. Transmitters were then removed and a sample of vibrissae was taken for rhodamine B analysis. Carcasses found were analysed for 1080. Predator numbers were assessed before and after baiting using track pads across trails. Among the initial 36 radio-collared quolls, nine mortalities were recorded during the course of the study (seven after baiting). Only one of the nine deaths could be directly attributed to 1080 poisoning. In addition, vibrissae from five of the 35 individuals sampled after baiting were marked with rhodamine B, indicating that these individuals had consumed bait, and survived. Consequently, mortality attributable to this particular aerial baiting campaign was low, apparently because few quolls ate bait and most of those that did survived. Track counts for predators indicated a significant decrease in dog and fox numbers after baiting. Cat activity remained unchanged and the number of quoll tracks increased.

Aerial baiting for wild dogs has no observable impact on spotted-tailed quolls (Dasyurus maculatus) in a rainshadow woodland

2007 ◽  
Vol 34 (2) ◽  
pp. 116 ◽  
Author(s):  
Andrew W. Claridge ◽  
Douglas J. Mills
Keyword(s):  
Rhodamine B ◽  
Canis Lupus ◽  
New South ◽  
New South Wales ◽  
Canis Lupus Familiaris ◽  
Short Term ◽  
Feral Cats ◽  
South Wales ◽  
Radio Transmitters ◽  
Wild Dogs

The short-term impact of 1080 aerial baiting for wild dogs (Canis lupus dingo, Canis lupus familiaris and hybrids of the two) on spotted-tailed quolls (Dasyurus maculatus) was investigated at a rainshadow woodland site in southern New South Wales, Australia. Sixteen quolls were trapped and fitted with radio-transmitters containing mortality sensors. Three feral cats were also opportunistically trapped and radio-collared. One week after trapping ceased, meat baits nominally containing 6 mg of 1080 poison and 50 mg of the biomarker rhodamine B were deployed aerially over a 10-km transect across the study area. Following bait deployment, collared quolls and cats were monitored daily over four weeks for evidence of mortality. During this time, one quoll and two cats died. The quoll did not die from 1080 but both cats showed clear signs of poisoning. Whisker samples were obtained from trapped quolls 5–8 weeks after baiting to determine whether they had been exposed to baits. Of the 15 remaining collared quolls, 12 were retrapped. Four of these tested positive for rhodamine B. Three individuals originally collared were not retrapped but confirmed alive at least seven weeks after bait deployment. A further six non-collared quolls were also trapped, with two of these positive for rhodamine B. Of the 19 quolls from which whisker samples were tested for rhodamine B then, 13 (68%) were negative and six (32%) were positive. Aerial baiting had no observable impact on the local radio-collared quoll population, a finding consistent with results from a similar study recently conducted in northern New South Wales.

Diets of sympatric red foxes Vulpes vulpes and wild dogs Canis lupus in the Northern Rivers Region, New South Wales.

2006 ◽  
Vol 28 (1) ◽  
pp. 101 ◽  
Author(s):  
A. S. Glen ◽  
A. R. Fay ◽  
C. R. Dickman
Keyword(s):  
Canis Lupus ◽  
Vulpes Vulpes ◽  
New South ◽  
New South Wales ◽  
Red Foxes ◽  
South Wales ◽  
Northern Rivers ◽  
Wallabia Bicolor ◽  
Wild Dogs ◽  
Swamp Wallaby

In the Northern Rivers region of New South Wales the diets of sympatric foxes (Vulpes vulpes) and dogs (Canis lupus) were determined from analysis of oportunitically collected scats. Mammalian prey dominated the diet of both species but foxes had a more diverse diet than dogs. The red-necked pademelon (Thylogale thetis) had the highest occurrence in both predators. the northern brown bandicoot (Isoodon macrourus) was the second most common prey of the fox but did not occur in dog scats. Swamp wallaby (Wallabia bicolor) was more common in dog scats than fox scats.

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