Home-range estimates and habitat of the yellow-bellied glider (Petaurus australis) at Waratah Creek, New South Wales

1993 ◽  
Vol 20 (3) ◽  
pp. 387 ◽  
Author(s):  
RL Goldingay ◽  
RP Kavanagh
Keyword(s):  
Home Range ◽  
Forest Type ◽  
The Body ◽  
Home Ranges ◽  
Forest Types ◽  
Minimum Convex Polygon ◽  
Mean Values ◽  
Independent Observations ◽  
Eucalyptus Ovata ◽  
Petaurus Australis

The yellow-bellied glider (Petaurus australis), the largest of the exudivorous marsupials, lives in small family groupings and occupies virtually exclusive home ranges. A variety of estimation techniques were used to determine the home-range area of five glider groups. Two sets of data were analysed for each glider group; one included the locations of all observations while the other utilised a subset considered to represent independent observations based on a 3-h interval between consecutive locations. The techniques favoured for estimating home-range area, minimum convex polygon (MCP) and 95% isopleth of the harmonic mean (95% HM), gave mean values of 59 ha and 46 ha, respectively, when all data were included. These values were 28% and 14% larger, respectively, than those estimated with independent data. An extrapolation that accounted for the influence of the number of locations on the area estimated gave a mean MCP value of 63 ha for the five groups. This value was compared with estimates for other exudivorous mammals and is much greater than that predicted from the body weight of this species. The home ranges (defined by the 95% HM) of the five glider groups included different proportions of the seven forest types available in the study area. The forest type in which Eucalyptus ovata predominated was identified as a key habitat. It was the least abundant yet was included in all five home ranges, unlike several of the more abundant forest types which were absent from some home ranges. The above results are discussed in relation to forest management and conservation.

Variation in the home-range size of the squirrel glider (Petaurus norfolcensis)

2010 ◽  
Vol 32 (2) ◽  
pp. 183 ◽  
Author(s):  
Ross L. Goldingay ◽  
David J. Sharpe ◽  
Matt D. J. Dobson
Keyword(s):  
Home Range ◽  
Habitat Quality ◽  
New South ◽  
Home Range Size ◽  
Range Size ◽  
Home Ranges ◽  
Minimum Convex Polygon ◽  
South Wales ◽  
Squirrel Glider ◽  
Range Estimate

The home-range area of animals may vary geographically and in response to habitat quality. We investigated the size of squirrel glider (Petaurus norfolcensis) home ranges near Brisbane, Queensland, and at Tea Gardens on the central coast of New South Wales. Habitat at both sites had been partially cleared and had been subjected to grazing for several decades. Twelve gliders were tracked over an average of 3.5 months in Brisbane. The fixed kernel (FK95%) home-range estimate averaged 4.6 ± 0.7 (s.e.) ha while the minimum convex polygon (MCP100%) averaged 6.7 ± 1.5 ha. Six gliders were tracked over 1 month at Tea Gardens. The FK95% home-range estimate averaged 14.8 ± 2.4 ha while the MCP100% averaged 13.3 ± 3.1 ha. The Tea Gardens values are derived from relatively short periods and are likely to underestimate the areas used. This study demonstrates that home-range size can vary substantially in the squirrel glider. This has implications for understanding how this species responds to variation in habitat quality and highlights the need for site-specific studies to inform aspects of management.

scholarly journals Stopover Ecology and Habitat Selection of Juvenile Swainson's Thrushes During Fall Migration Along the Northern California Coast

The Condor ◽  
2007 ◽  
Vol 109 (4) ◽  
pp. 795-807 ◽  
Author(s):  
James R. Tietz ◽  
Matthew D. Johnson
Keyword(s):  
Home Range ◽  
Forest Type ◽  
Coniferous Forest ◽  
Home Range Size ◽  
Home Ranges ◽  
Northern California ◽  
Catharus Ustulatus ◽  
California Coast ◽  
Selection For ◽  
Selection Of

Abstract We investigated selection of stopover habitat by juvenile Swainson's Thrushes (Catharus ustulatus) during fall migration at a site along the northern California coast. The study site vegetation consisted mainly of coniferous forest (pine [Pinus] and spruce [Picea]), with interspersed patches of broadleaf forest (willow [Salix] and alder [Alnus]) in poorly drained swales. For 26 birds captured and radio-tracked in 2002 and 2003, the average minimum stopover duration was 8.9 ± 1.0 days. For 20 of these birds with a sufficient number of locations, the average home range size was 1.9 ± 0.3 ha. Thrushes showed no overall pattern of selection for forest type within the study area or for forest type used inside their home range. Fat and lean birds selected forest types similarly within the study area and their home ranges. However, locations occupied by lean birds had twice as much huckleberry (Vaccinium ovatum) shrub cover and were 1.3 times more concealed by vegetation than locations occupied by fat birds. There were 2.5 times more huckleberries at occupied than random locations, and locations occupied by lean birds had 2.1 times more berries overall than those frequented by fat birds. Fecal analyses confirmed that huckleberries were a commonly consumed food (70% of sampled thrushes), but also revealed that thrushes ate arthropods (87%) and wax myrtle (Myrica californica) bracteoles (43%). The overall lack of forest type selection coupled with differences between fat and lean birds in selection for cover and fruit abundance suggests that fat level may influence microsite selection.

scholarly journals Importance of canopy connectivity for home range and movements of the rainforest arboreal ringtail possum (Hemibelideus lemuroides)

2007 ◽  
Vol 34 (3) ◽  
pp. 177 ◽  
Author(s):  
Robyn F. Wilson ◽  
Helene Marsh ◽  
John Winter
Keyword(s):  
Home Range ◽  
Negative Impact ◽  
Ground Level ◽  
Home Ranges ◽  
Radio Tracking ◽  
Minimum Convex Polygon ◽  
The Road ◽  
North East ◽  
Wide Road ◽  
Ringtail Possum

Roads and powerline corridors destroy canopy connectivity in the rainforest of north-east Australia. We tested the hypotheses that linear barriers affect (a) the alignment of home ranges, (b) use of habitat either side of linear barriers, and (c) the crossing of them by the strictly arboreal lemuroid ringtail possum (Hemibelideus lemuroides), which is known to be vulnerable to habitat fragmentation. Radio-tracking and a translocation experiment were conducted at a narrow 7-m-wide road and an 80-m-wide powerline. Homes ranges of lemuroid ringtails ranged from 0.15 to 1.67 ha (minimum convex polygon) and were aligned with the road but not powerline corridors. When lemuroid ringtails were experimentally translocated, wider canopy clearings over roads reduced their capacity to return to their original home range, and the powerline corridor was a nearly insurmountable barrier. No possums were observed crossing roads or the powerline corridor at ground level or residing in the intervening matrix, indicating that loss of canopy connectivity has a negative impact on their movements.

Movements and Home Ranges of Feral Pigs (Sus Scrofa) in Kosciusko National Park, New South Wales.

1996 ◽  
Vol 23 (6) ◽  
pp. 711 ◽  
Author(s):  
G Saunders ◽  
B Kay
Keyword(s):  
Home Range ◽  
National Park ◽  
New South ◽  
New South Wales ◽  
Home Range Size ◽  
Range Size ◽  
Home Ranges ◽  
Minimum Convex Polygon ◽  
Feral Pigs ◽  
South Wales

The movements of a subalpine population of feral pigs were examined at Kosciusko National Park in southeastern New South Wales. Sufficient data were collected to estimate the home-range area of 20 pigs on the basis of 782 telemetry and trap locations. Mean (+/- s.d.) home-range size (minimum convex polygon method) for males (35.0 t 22.2 km*2) was significantly greater than that for females (1 1.1 +/- 5.2 km*2). Use of capture-recapture distances to estimate home-range size was considered inappropriate. A test for nomadism suggests that, although home ranges of pigs in this environment were larger than those reported for other pigs in Australia, the pigs were essentially sedentary. Management implications for this population are discussed.

scholarly journals Home range areas of koalas in an urban area of north-east New South Wales

2014 ◽  
Vol 36 (1) ◽  
pp. 74 ◽  
Author(s):  
Ross L. Goldingay ◽  
Barbara Dobner
Keyword(s):  
Home Range ◽  
Urban Area ◽  
Urban Areas ◽  
Tree Planting ◽  
Home Ranges ◽  
Minimum Convex Polygon ◽  
Phascolarctos Cinereus ◽  
North East ◽  
South Wales ◽  
Primary Habitat

Conserving wildlife within urban areas requires knowledge of habitat requirements and population processes, and the management of threatening factors. The koala (Phascolarctos cinereus) is one species that is adversely affected by urban development. Sick and injured koalas in the Lismore urban area are regularly taken into care. We radio-tracked koalas released from care in order to estimate home-range areas and to determine their fate. Koalas were tracked for periods of 90–742 days; 7 of 10 survived for a period of at least one year. Home ranges defined by the minimum convex polygon (MCP100%) were large (mean ± s.e. = 37.4 ± 8.2 ha). Analysis using the 95% Fixed Kernel revealed home-range areas of 8.0 ± 1.7 ha. Analysis of the habitat composition of each MCP home range showed that they included 4.3 ± 0.9 ha of primary habitat (dominated by their primary food trees). These home ranges contained 27.6 ± 6.8 ha of non-habitat (cleared or developed land). Koalas crossed roads within their home ranges at least 5–53 times; one crossed the Bruxner Highway near a roundabout at least 32 times over his 2-year tracking period. Future management should include strategic food tree planting that enhances habitat connectivity and minimises the risk of car strike or dog attack.

Home range, movement and habitat utilisation of the Carpentarian rock-rat (Zyzomys palatalis) in an isolated habitat patch

2004 ◽  
Vol 31 (3) ◽  
pp. 327 ◽  
Author(s):  
Helen Puckey ◽  
Milton Lewis ◽  
David Hooper ◽  
Carrie Michell
Keyword(s):  
Home Range ◽  
Radio Telemetry ◽  
Central Area ◽  
Limited Resource ◽  
Home Ranges ◽  
Habitat Patch ◽  
Minimum Convex Polygon ◽  
Significant Difference ◽  
Core Areas ◽  
The Mean

Radio-telemetry was used to examine the home range, movement and habitat utilisation of the critically endangered Carpentarian rock-rat (Zyzomys palatalis) in an isolated habitat patch in the Gulf of Carpentaria hinterland over a 13-month period. Two home-range estimators were used in the study, (i) minimum convex polygon (MCP) and (ii) fixed Kernel (KL), the latter also being used to estimate core areas of activity. Based on a total sample size of 21 individuals, the mean MCP home range was 11 165 m2, similar to the mean KL home range of 10 687 m2. Core areas were, on average, 11.9% of the KL home-range estimate. There was no significant difference in the size of home range or core area of males and females. Juveniles had a significantly smaller home range than adults. Home ranges and, to a lesser degree, core areas were non-exclusive, with multiple areas of overlap (averaging 41% and 38% respectively) within and between all age and gender categories, but especially between males and between juveniles. Movement frequencies showed that animals made many short forays in a central area close to the arithmetic home-range mean and far fewer long forays of distances greater than 100 m from the central area. The spatial and temporal activity of Z. palatalis was concentrated in, but not confined to, the 'valley' and 'slope' habitats, with fewer movements of rats onto the surrounding 'plateau'. Resource selection analyses showed that Z. palatalis tended to prefer valley and slope habitats over the plateau and that the proportion of point locations was significantly higher for adults in the slope habitat and for juveniles in the valley habitat. Most home ranges were centred on the ecotone between these two habitat types. Although isolated and spatially limited, these habitat patches provide high-quality resources for dense populations of Z. palatalis. This study exemplifies a species' attempt to make efficient use of a limited resource in an otherwise hostile environment. Even small declines in habitat area or quality due to their vulnerability to fire would impact upon many animals.

scholarly journals Bimodal habitat use in brood parasitic Common Cuckoos (Cuculus canorus) revealed by GPS telemetry

The Auk ◽  
2019 ◽  
Vol 136 (2) ◽  
Author(s):  
Csaba Moskát ◽  
Miklós Bán ◽  
Attila Fülöp ◽  
Judit Bereczki ◽  
Márk E Hauber
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Distribution Patterns ◽  
Home Ranges ◽  
Cuculus Canorus ◽  
Utilization Distribution ◽  
Minimum Convex Polygon ◽  
Reed Beds ◽  
Male And Female ◽  
Distribution Maps

Abstract Obligate brood parasitic birds have evolved a rare avian strategy for reproduction by laying eggs in the nests of other species. In doing so, their breeding ranges, but not necessarily their foraging habitats, have become intimately related to the nesting territories of their hosts. We studied home range sizes and distribution patterns in Common Cuckoos (Cuculus canorus) on their breeding grounds in central Hungary, where cuckoos parasitize only Great Reed Warblers (Acrocephalus arundinaceus) in channel-side reed-beds at a high frequency (>50%). The geographic coordinates of tagged cuckoos were monitored by high-precision, remotely downloadable non-Platform Terminal Transmitter global positioning system (GPS) loggers, attached to 9 females and 6 males. Our results revealed bimodal use of habitat patches: (1) the home ranges of male and female cuckoos were packed densely along the channels where the hosts breed, and their distribution maps had high overlaps between sexes; (2) ~71% of cuckoos also visited nearby woodland patches, presumably for foraging, where the host species was not present. The size of cuckoo home ranges varied to an unusually great extent: 0.3–185 km2 as calculated by the minimum convex polygon method (85%), or 1–17 km2 when calculated by the more suitable kernel density estimation (KDE) method (Utilization Distribution 85%) for patchy habitats. Male and female cuckoos had similar home range sizes as estimated by the KDE method, consisting of 1–4 areas within the 2 habitat types of channel reed-beds and woodlands. No preference was revealed for night roosting locations between the 2 habitats or sexes. Female cuckoos were more likely to use reed-beds in the afternoons, when females parasitize host nests. Remote downloadable GPS methods offer an effective way of tracking cuckoos across large areas, but the estimation of home range sizes requires caution due to this species’ patchy and disconnected habitat use.

Habitat selection by parturient elk (Cervus elaphus) in agricultural and forested landscapes

2010 ◽  
Vol 88 (10) ◽  
pp. 968-976 ◽  
Author(s):  
Ryan K. Brook
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Protected Areas ◽  
Cervus Elaphus ◽  
Protected Area ◽  
Deciduous Forest ◽  
Home Ranges ◽  
Minimum Convex Polygon ◽  
Forage Crops ◽  
Resource Managers

I examined the home range and habitat selection of 146 radio-collared female elk ( Cervus elaphus L., 1758) from 2002 to 2005 during the calving period (15 May to 24 June). I determined the proportion of home ranges of parturient cow elk during the calving period and the proportion of birthing sites of elk that were in either forested protected areas or the adjacent fragmented agriculture-dominated matrix in southwestern Manitoba, Canada. Overall, 73% of the minimum convex polygon home ranges were entirely within a protected area, 6% were only on farmland, and 21% included both. Home ranges including farmland and protected area (mean = 17.9 km2) were 3.8 times larger than those entirely inside a protected area (mean = 4.7 km2) or only on farmland (mean = 4.5 km2) (U = –2.79, P = 0.005). Female elk remaining solely in protected areas selected deciduous and mixedwood forest, marsh and fen, and water at the scale of the home range. Elk exclusively on farmland selected forage crops only. At the scale of the birthing site, females on farmland and those in protected areas selected only deciduous forest, and both types avoided agricultural cropland and marsh and fen. Identification of calving habitat will allow resource managers to manage bovine tuberculosis in the population more effectively.

Home ranges, time budgets and food-tree use in a high-density tropical population of greater gliders, Petauroides volans minor (Pseudocheiridae : Marsupialia)

1996 ◽  
Vol 23 (4) ◽  
pp. 401 ◽  
Author(s):  
SS Comport ◽  
SJ Ward ◽  
WJ Foley
Keyword(s):  
Population Density ◽  
Home Range ◽  
Kernel Method ◽  
Radio Telemetry ◽  
High Population ◽  
Home Ranges ◽  
Time Budgets ◽  
High Population Density ◽  
Mean Values ◽  
Males And Females

The socio-ecology of Petauroides volans has been studied for subtropical and temperate populations, but not for the northern tropical subspecies, Petauroides volans minor. Data on the effects of a high population density on home ranges, time budgets and food-tree use were obtained by means of radio-telemetry. Three techniques were used to estimate home-range area (kernel, MCP and harmonic mean) and the kernel method was preferred. Estimates of home-range area (defined by the 95% kernel) gave mean values of 2.5 and 1.3 ha for males and females, respectively. Broad overlap of home ranges of males was observed, which has not been reported previously for populations of P. volans. Behaviour patterns for males and females were similar to those in previous studies, although the mating system may differ, possibly because of the high population density. Dietary patterns were similar to those previously reported for this species, the most important food items being young leaves and flower buds of particular eucalypt species, notably Eucalyptus acmenoides.

Spatial Organisation of Urban Feral Cats (Felis Catus) in Jerusalem.

1995 ◽  
Vol 22 (3) ◽  
pp. 299 ◽  
Author(s):  
V Mirmovitch
Keyword(s):  
Home Range ◽  
Home Range Size ◽  
Home Ranges ◽  
Adult Males ◽  
Mating Season ◽  
Minimum Convex Polygon ◽  
Spatial Organisation ◽  
Similar Frequency ◽  
Feral Cats ◽  
Young Males

Feral cats were studied for 10 months in a residential area in Jerusalem and their spatial distribution compared during two 1-month periods, the first in the autumn prior to the mating season and the second during the mating season (winter). Cat locations were recorded by direct observations, and home-range sizes were calculated with the minimum convex polygon method. No significant change in home-range size of adult males or females was found between the 2 periods. Young males expanded their home ranges considerably during their first mating season. Home ranges of males were significantly larger than those of females in both periods (0.56 and 0.30 ha, respectively, in autumn; 0.75 and 0.27 ha in winter). The home ranges of both sexes overlapped considerably with individuals of the same sex. Overlap among home ranges of females indicated a group pattern. High overlap (80%) was found among females that fed from the same set of garbage bins with similar frequency. Lower overlap (20%) was found between individual females that shared only a subset of their food resources and used it with different frequency. It is suggested that the distribution of food patches (garbage bins), the amount of food available and the rate of food renewal determined the cats' spatial organisation.

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