Possible Causes of Mortality in The Yellow-Footed Rock-wallaby, Petrogale xanthopus Gray (Marsupialia: Macropodidae).

1996 ◽  
Vol 19 (2) ◽  
pp. 245
Author(s):  
P. Hornsby

The causes of mortality were analysed for 23 Yellow-footed Rock-wallabies, Petrogale xanthopus found on or near the dry bed of the Hamilton Creek in the North Flinders Ranges of South Australia. The results showed the Red Fox, Vulpes vulpes to be the more frequently identified predator. On the basis of size, 13 of the wallabies were classed as adult and seven were immature, while the remaining three were unknown. Three were male; seven were female, and 13 were of unknown sex. 15 of the 23 were found during the period April - July; the time of year when there is a peak of young leaving the pouch.

2018 ◽  
Vol 124 (4) ◽  
pp. 621-632 ◽  
Author(s):  
Johan Wallén ◽  
Mark J Statham ◽  
Erik Ågren ◽  
Marja Isomursu ◽  
Øystein Flagstad ◽  
...  

2004 ◽  
Vol 26 (2) ◽  
pp. 185
Author(s):  
PE Hornsby ◽  
EY Corlett

Responses to severe drought by two sympatric macropodids, the yellow-footed rock-wallaby (Petrogale xanthopus) and the euro (Macropus robustus erubescens) were examined at a site in the North Flinders Ranges of South Australia. The results indicate that the two species respond differentially to drought conditions. It was observed that small fluctuations occurred in the P. xanthopus population. In contrast, M. r. erubescens evidenced significant mortality, especially among larger animals.


1982 ◽  
Vol 30 (1) ◽  
pp. 49 ◽  
Author(s):  
FJ Odendaal ◽  
CM Bull

Ranidella signifera has a wide distribution in south-eastern Australia; R. riparia is endemic to the Flin- ders Ranges in South Australia. The ranges of the two species are largely allopatric, but they contact and overlap in a zone about 10 km wide, in the southern Flinders Ranges. The nature of the creeks changes across this zone. Immediately to the south and east, where only R. signifera is found, the creeks are slow-flowing and heavily vegetated, with mud or sand substrates. To the north and west the creeks are swift-flowing, and have rocky substrates and little vegetation; only R. riparia is found in these. In the sympatric overlap zone creeks are heterogeneous, with both habitat types represented. The close association between species and creek habitat is lost in populations not immediately adjacent to the overlap zone. This implies that each species can survive in both creek habitats but that R. riparia has a competitive advantage in swift, rocky creeks and R, signifera has an advantage in slow, vegetated creeks. This prevents either species from expanding its distribution beyond the narrow overlap area.


1983 ◽  
Vol 10 (1) ◽  
pp. 47 ◽  
Author(s):  
PB Copley

Petrogale xanthopus still occurs over most of its former range in South Australia. It is widespread in the Flinders Ranges, where almost 200 colonies are now known, and is locally common in areas of both the Rinders Ranges and Olary Hills. Six colonies are currently known in the western Gawler Ranges with an outlying population on Carriewerloo Station only 50 km west of Port Augusta. Seven colonies have been found in the Olary Hills, to the north and north-west of Olary. The species has suffered a major decline in abundance since European settlement, having become extinct locally throughout this range. Hunting for skins, competition with introduced herbivores for food and shelter, and predation by foxes seem to be the main reasons for this decline. However, it is still not possible to say whether the species currently has a decreasing population and is at risk, is in equilibrium, or is increasing. Information published in this paper and current studies in South Australia and New South Wales should soon determine this.


Zootaxa ◽  
2012 ◽  
Vol 3499 (1) ◽  
pp. 1 ◽  
Author(s):  
S. DONNELLAN ◽  
M. ANSTIS ◽  
L. PRICE ◽  
L. WHEATON

We describe, as a new species, the northern Flinders Ranges populations of the myobatrachid frog Crinia riparia. It isdistinguished from C. riparia sensu stricto on the basis of reciprocal monophyly of mitochondrial genes, absence ofhaplotype sharing in a nuclear gene, fixed differences in allozyme loci and differences in larval oral disc morphologyconsistent with less adaptation to stream habitats. We were not able to reliably distinguish the taxa on the basis of adultmorphology. The geographic range of C. riparia sensu stricto is now reduced to a 75 kilometre section of the southernFlinders Ranges from Napperby Gorge in the south to Mt Brown in the north suggesting that an assessment of its conservation status is warranted.


Episodes ◽  
2012 ◽  
Vol 35 (1) ◽  
pp. 247-255 ◽  
Author(s):  
James B. Jago ◽  
James G. Gehling ◽  
John R. Paterson ◽  
Glenn A. Brock ◽  
Wenlong Zang

2018 ◽  
Vol 40 (2) ◽  
pp. 204 ◽  
Author(s):  
John C. Z. Woinarski ◽  
Sally L. South ◽  
Paul Drummond ◽  
Gregory R. Johnston ◽  
Alex Nankivell

Introduced predators have had, and continue to have, severe impacts on Australian biodiversity. At a recently established conservation reserve, Witchelina, in arid South Australia, we assessed the diet of feral cats (Felis catus) (404 samples), red fox (Vulpes vulpes) (51 samples) and dog (Canis familiaris) (11 samples) over a 3-year period. There was marked overlap (98.5%) in dietary composition between cats and foxes. Rabbits (Oryctolagus cuniculus) comprised a major dietary item for all three predators. Invertebrates contributed the largest number of prey items for foxes and cats, but mammals comprised the bulk, by weight, for all three predators. Birds and reptiles had a higher frequency of occurrence in the diet of cats than of foxes or dogs. The size of mammal prey taken was least for cats and greatest for dogs. The diets of cats and foxes showed significant seasonal variation, with reptiles and invertebrates being least common in the diet in winter. The threatened thick-billed grasswren (Amytornis modestus) was found for the first time in the diet of feral cats. Bearded dragons (Pogona vitticeps) occurred in about one-third of cat and fox samples. This study contributes further to the evidence of biodiversity impacts of introduced predators, and the need for their strategic management.


1983 ◽  
Vol 10 (2) ◽  
pp. 363 ◽  
Author(s):  
MB Thompson

Regular inspection of tortoise nesting sites along the Murray River in South Australia showed that over 96% of eggs were taken by predators. Endemic predators accounted for less than 3% of this total. Foxes took the rest. Comparison of the age structure of the Emydura species in the Murray and Cooper Creek revealed that the populations were very different. The Murray population of Emydura rnacquarii contained a disproportionately large number of old individuals; this difference was attributed to egg losses. The same was true for Chelodina longicollis. As these old animals die recruitment of juveniles into the population will probably fall even further. As a result tortoise populations in the Murray will decline.


2017 ◽  
Vol 51 (3) ◽  
pp. 187-202 ◽  
Author(s):  
E. I. Varodi ◽  
A. M. Malega ◽  
Y. I. Kuzmin ◽  
V. V. Kornyushin

Abstract The article summarizes information on the nematodes parasitic in wild Carnivora of Ukraine. Totally, 50 species of nematodes are known to parasitise carnivorans in the country, 30 species were registered in the present study. Nematodes were found in 14 species of examined hosts from the families Canidae, Mustelidae and Felidae. Maximum diversity of nematodes of carnivorans was observed in Polissia (forest zone in the north of the country) and in Kherson Region in the south. Hosts from the family Canidae harboured 19 nematode species; studied species of the Mustelidae were infected with 15 nematode species, 6 of them were also found in Canidae. The wildcat (Felis silvestris Schreber) and the lynx (Lynx lynx Linnaeus) harboured only two species of nematodes, both are specific parasites of these hosts. The most comprehensive information concerns the nematode communities of the red fox (Vulpes vulpes Linnaeus) and the wolf (Canis lupus Linnaeus), with 19 and 9 nematode species found, correspondingly. From 1 to 6 nematode species were found in other species of carnivorans.


1999 ◽  
Vol 26 (4) ◽  
pp. 453 ◽  
Author(s):  
J. Read ◽  
P. Copley ◽  
P. Bird

Recent surveys have shown that the desert mouse (Pseudomys desertor), which was once considered to be rare in South Australia, is relatively widespread throughout the north-west of the State. However, historical localities in the Flinders Ranges and Nullarbor Plain were not matched with contemporary records, suggesting a range contraction to the central desert regions. Habitat preferences were determined from 78 captures at 41 sites, which revealed that samphire, sedge and nitrebush habitats, along with spinifex grassland, were favoured. A high tolerance to high rabbit numbers, mining activity, moderate cattle grazing pressures and cohabitation with Mus domesticus was evident. Pseudomys desertor is sometimes diurnal, possibly as a result of the time-consuming and regular foraging requirements of its folivorous diet. High mortality rates, resulting from prolonged exposure to predators, and lack of complex deep burrow systems are offset by its high fecundity and ecological plasticity. We consider that P. desertor is secure in the north-western arid zone of South Australia.


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