Reintroduction of the greater bilby, Macrotis lagotis (Reid) (Marsupialia : Thylacomyidae), to northern South Australia: survival, ecology and notes on reintroduction protocols

2003 ◽  
Vol 30 (1) ◽  
pp. 15 ◽  
Author(s):  
K. E. Moseby ◽  
E. O'Donnell
Keyword(s):  
Site Fidelity ◽  
South Australia ◽  
Home Range Size ◽  
Home Ranges ◽  
Radio Tracking ◽  
Significant Preference ◽  
Adult Females ◽  
Males And Females ◽  
Food Reserves

Nine bilbies were reintroduced to a 14-km2 reserve free of rabbits, cats and foxes in South Australia in April 2000. The survival, growth and ecology of the population were studied for 17 months after release by means of radio-tracking and trapping. Reproduction was continuous over the study period, with juveniles successfully recruited into the population. Home-range size of female bilbies averaged 0.18 km2 and was significantly smaller than home ranges of males, which averaged 3.16 km2. Wild-born subadults had smaller home ranges than adults. While male home ranges, and male and female home ranges overlapped considerably, females appeared to maintain areas discrete from other adult females. Bilbies showed a significant preference for dune habitat. As swale habitat appears too hard for burrow construction and males moved greater distances from diurnal burrows than females, males are likely to access food reserves that are under-used by females. Both males and females reused at least 30% of their burrows, and females displayed long-term site fidelity. The release was considered successful and suggests that despite historical damage from rabbits and stock, bilbies are able to successfully recolonise parts of their former range in arid South Australia once rabbits, cats and foxes are removed.

Home-Range Size and Fidelity of Western Grey Kangaroos (Macropus Fuliginosus) Living in Remnants of Wandoo Woodland and Adjacent Farmland.

1992 ◽  
Vol 19 (2) ◽  
pp. 137 ◽  
Author(s):  
GW Arnold ◽  
DE Steven ◽  
A Grassia ◽  
J Weeldenburg
Keyword(s):  
Home Range Size ◽  
Home Ranges ◽  
Adult Males ◽  
The Core ◽  
Adult Females ◽  
Radio Transmitters ◽  
Core Areas ◽  
Males And Females ◽  
Eucalyptus Wandoo ◽  
Older Males

The home ranges were studied from 1977 to 1981 of western grey kangaroos (Macropus fuliginosus) living in a 300-ha remnant of wandoo [Eucalyptus wandoo] surrounded by farmland at Baker's Hill, Western Australia. The M. fuliginosus population varied from 140 to 200 animals during the study. In 1979, four females (>30 kg) and 2 adult males (31 kg and 47 kg) were fitted with radio-transmitters and their movements recorded. The home ranges of these animals varied from 39 to 70 ha; the average overlap in the area used during the day and that used at night was 16.4%. Many of the kangaroos fed on farmland at night. The night ranges of 51 marked kangaroos were recorded using a spotlight. The animals showed a strong fidelity to their home ranges. Only 3 males (about 5-yr-old) shifted their night ranges; the centres of the ranges moved only 600-800 m. Older males had significantly larger night ranges than younger males and females. Individual females and the younger males showed preferences for using particular access points to get onto farmland; the older males showed no preferences. The core areas of the night ranges of many adult females overlapped closely in 'groups', but there was no evidence of 'mob' home ranges that were socially separated.

Home-range studies in a reintroduced brush-tailed rock-wallaby (Petrogale penicillata) population in the Grampians National Park, Victoria

2011 ◽  
Vol 33 (2) ◽  
pp. 128 ◽  
Author(s):  
Jenny Molyneux ◽  
David A. Taggart ◽  
Anthony Corrigan ◽  
Sean Frey
Keyword(s):  
Home Range ◽  
National Park ◽  
Site Fidelity ◽  
Home Range Size ◽  
Range Size ◽  
Local Extinction ◽  
Home Ranges ◽  
Radio Tracking ◽  
Western Victoria ◽  
Species Ecology

In 2008, after 9 years of presumed local extinction, brush-tailed rock-wallabies (Petrogale penicillata) were reintroduced at Moora Moora Creek in the Grampians National Park, western Victoria. Since little is known about this species in Victoria, the reintroduction presented an important opportunity to gain information on the species’ ecology. Radio-tracking was undertaken and home range determined for three individuals released 11 months before this study and a further five individuals that were released at the commencement of the study in October 2009. Home-range size showed little variation amongst individuals, with a mean overall home range of 26 ha (±1.69, s.e.) and a mean core home range of 2.5 ha (±0.24, s.e.). Newly reintroduced individuals showed higher levels of association with wallabies from the same release and greater site fidelity when known conspecifics were close. Within 5 months of release, newly reintroduced animals showed home ranges similar in both size and distribution to those of animals released 11 months prior.

Site fidelity of Weddell seals: the effects of sex and age

2007 ◽  
Vol 19 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Michael F. Cameron ◽  
Donald B. Siniff ◽  
Kelly M. Proffitt ◽  
Robert A. Garrott
Keyword(s):  
Life History ◽  
Site Fidelity ◽  
Life History Strategy ◽  
Reproductive Rate ◽  
Weddell Seals ◽  
Adult Females ◽  
Males And Females ◽  
A Site ◽  
Traditional Breeding

AbstractSite fidelity is believed to be an important life history strategy for Weddell seals (Leptonychotes weddellii), that return to traditional breeding colonies each spring. We examined four hypotheses concerning their fidelity to these colonies: 1) fidelity is stronger to natal sites (natal fidelity) than to other sites, 2) females exhibit greater site fidelity than males, 3) site fidelity for both sexes increases with age, 4) site fidelity in adult females is related to their reproductive status and their total number of offspring. Analysis of a long-term tagging database from McMurdo Sound did not support hypotheses 1 and 2. Although animals did express fidelity to specific sites over their lifetime (χ2 tests, P < 0.05), fidelity to natal colonies was lower than to other sites (χ2 test, P < 0.05). There were no differences in site fidelity between males and females (χ2 tests, P > 0.05). Hypothesis 3 was supported. Since the probability of a returning seal occupying the same colony as the previous year increased with age among both sexes to about age 12. Finally, in support of hypothesis 4, females with a higher degree of site fidelity were more likely to both have a higher reproductive rate and return to a site where they have previously given birth.

A PIT tag based analysis of annual movement patterns of adult fire salamanders (Salamandra salamandra) in a Middle European habitat

2007 ◽  
Vol 28 (4) ◽  
pp. 531-536 ◽  
Author(s):  
Ulrich Schulte ◽  
Daniel Küsters ◽  
Sebastian Steinfartz
Keyword(s):  
Site Fidelity ◽  
Negative Impact ◽  
Natural Habitat ◽  
Home Range Size ◽  
Activity Period ◽  
Limited Area ◽  
Home Ranges ◽  
Minimum Convex Polygon ◽  
Pit Tags ◽  
Salamandra Salamandra

Abstract We studied patterns of annual movement of individual adult fire salamanders (Salamandra salamandra) during the years 2001 and 2002 in Western Germany in a typical middle European habitat for this species. We tested whether salamanders inhabit small home ranges and move little during the activity period as predicted for a species that shows strong site fidelity to a limited area. Initially, 98 individuals were collected in their natural habitat and marked with passive integrated transponder (PIT) tags. Of those individuals 88 were released at the collection site for recapture during the activity periods of the years 2001 and 2002. Ten marked individuals were kept in captivity to test for the tolerance of PIT tags. We did not find any negative impact of PIT tags on marked individuals of S. salamandra, neither under captive nor natural conditions. Forty-seven of the marked individuals (corresponding to 53% of the 88 released ones) were recaptured at least once and 28 individuals (corresponding to 32%) were recaptured multiple times. The return rate of males (78%) was higher than for females (43%). Mean home range size (and standard deviation) was estimated to 494 ± 282 m2 for 4 individuals as the minimum convex polygon based on 5 to 6 recapture events for each individual per year and to 1295 ± 853 m2 for 3 individuals with 8 records over two years. Minimum distances moved inferred from individual recaptures increased during the activity period of both years with time, indicating that individuals have more of a tendency to disperse than to stay within a limited area. Our data suggest therefore that S. salamandra adults display site fidelity, but use a much larger area than hitherto documented for this and other terrestrial salamander species.

Home ranges and movement schedules of sympatric bridled nailtail and black-striped wallabies

1996 ◽  
Vol 23 (5) ◽  
pp. 547 ◽  
Author(s):  
M Evans
Keyword(s):  
Home Range ◽  
Home Range Size ◽  
Range Size ◽  
Home Ranges ◽  
Radio Tracking ◽  
Wet Season ◽  
Seasonal Differences ◽  
Dry Seasons ◽  
Species Movement ◽  
Wet And Dry Seasons

Home ranges and movement schedules of sympatric bridled nailtail wallabies, Onychogalea fraenata, and black-striped wallabies, Macropus dorsalis, were studied during wet and dry seasons by radio-tracking. Home ranges of black-striped wallabies (91 ha) were much larger than those of bridled nailtail wallabies (40 ha). Home-range size differed between sexes for bridled nailtail wallabies (males, 59 ha; females, 26 ha), but not for black-striped wallabies. Intraspecific seasonal differences in home-range size were not significant. All home ranges included diurnal shelter habitat, although the preferred type of shelter habitat was different for each species. Movement schedules differed significantly between wet and dry seasons for black-striped wallabies (which made a higher frequency of longer-distance movements during the dry season than during the wet season), but not for bridled nailtail wallabies.

Mating strategies of Pampean mouse males

2012 ◽  
Vol 62 (4) ◽  
pp. 381-396 ◽  
Author(s):  
Florencia Bonatto ◽  
Daniela Gomez ◽  
Andrea Steinmann ◽  
José Priotto
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Home Range ◽  
Space Use ◽  
Home Range Size ◽  
Mating Strategies ◽  
Range Size ◽  
Home Ranges ◽  
Males And Females ◽  
Akodon Azarae

Patterns of space use and sexual dimorphism are frequently used to infer mating systems. We examined body size and home range size and intra- and intersexual overlap degree in order to elucidate mating strategy of Akodon azarae males. We studied spacing patterns using 113 and 129 home ranges established by males and females, respectively, in four 0.25 ha enclosures during the breeding season. Significant differences between sexes in home range size and overlap degree were found. Male home ranges were always larger than those of females. We observed exclusive space use among males and among females. Considering only those males that shared their home ranges with females, average intersexual overlap value was about 50%. Males mainly overlap their home ranges with home ranges of two or three females. Significant differences in body size were found between males and females, with males being larger. We concluded that space use and sexual dimorphism in this species is consistent with patterns characteristic of polygynous rodents, and we propose a polygynous system in A. azarae.

Zamenis scalaris prefers abandoned citrus orchards in Eastern Spain. Ecological insights from a radio-tracking survey

2019 ◽  
Vol 40 (1) ◽  
pp. 113-119 ◽  
Author(s):  
Fernando Martinez-Freiria ◽  
Marcial Lorenzo ◽  
Miguel Lizana
Keyword(s):  
Spatial Ecology ◽  
Home Range Size ◽  
Home Ranges ◽  
Radio Tracking ◽  
Spatial And Temporal Patterns ◽  
Citrus Orchard ◽  
Subsequent Increase ◽  
Citrus Orchards ◽  
Active Forager ◽  
One Year

Abstract Zamenis scalaris is a generalist active forager Mediterranean snake for which knowledge on spatial ecology is very limited. We report insights into the spatial and temporal patterns, and habitat use of four snakes, obtained through one-year radio-tracking monitoring in a citrus orchard landscape, in Eastern Iberia. Snakes showed a highly secretive behaviour, remaining hidden most of the annual cycle (>96% of records). Annual home ranges and movements were reduced in contrast to the expected energetic requirements of the species. Despite a similar pattern of non-activity during winter and a subsequent increase of movement rate and home range size in spring, each snake adopted a distinct spatial behaviour in summer and autumn. Abandoned citrus orchards and accessory constructions were the most frequent habitats selected by snakes, offering abundant prey and shelter. These resources are likely playing a crucial role in the spatial ecology of Z. scalaris.

scholarly journals Space use and movement of jaguar (Panthera onca) in western Paraguay

Mammalia ◽  
2018 ◽  
Vol 82 (6) ◽  
pp. 540-549 ◽  
Author(s):  
Roy T. McBride ◽  
Jeffrey J. Thompson
Keyword(s):  
Confidence Interval ◽  
Home Range ◽  
Hydrological Cycle ◽  
Home Range Size ◽  
Density Estimator ◽  
Home Ranges ◽  
Panthera Onca ◽  
Core Areas ◽  
Brazilian Pantanal

AbstractHome range and core area size were estimated for jaguar (Panthera onca) in western Paraguay in the Dry Chaco, Humid Chaco and Pantanal using an autocorrelated kernel density estimator. Mean home range size was 818 km2(95% confidence interval: 425–1981) in the Dry Chaco and 237 km2(95% confidence interval: 90–427) in the Humid Chaco/Pantanal. Core areas, defined as the home range area where use was equal to expected use, was consistent across sexes and systems represented on average by the 59% home range isopleth (range: 56–64%). Males had a higher probability of larger home ranges and more directional and greater daily movements than females collectively and within systems. The large home ranges in the Dry Chaco are attributable to the relatively low productivity of that semi-arid ecosystem and high heterogeneity in resource distribution while larger than expected home ranges in the Humid Chaco/Pantanal compared to home range estimates from the Brazilian Pantanal may be due to differences in geomorphology and hydrological cycle. The large home ranges of jaguars in western Paraguay and a low proportional area of protected areas in the region demonstrate the importance of private ranchland for the long-term conservation of the species.

Home range, nest use and activity of the Tasmanian bettong, Bettongia gaimardi

1993 ◽  
Vol 20 (1) ◽  
pp. 87 ◽  
Author(s):  
RJ Taylor
Keyword(s):  
Home Range ◽  
Plant Material ◽  
Home Range Size ◽  
Range Size ◽  
Ground Vegetation ◽  
Home Ranges ◽  
Regular Pattern ◽  
Radio Tracking ◽  
Tracking Period

Home range, nest use and activity of the Tasmanian bettong, Bettongia gaimardi, was investigated in northern Tasmania. During 3-week periods in August and November 1986 and February and May 1987 radio-tracking of six females and three males was undertaken, five of these being tracked in more than one period. Home ranges of males were larger than those of females. There was no indication of any major differences in home-range size or shifts in location of home ranges between seasons. Nightly patterns of movement were essentially random with distances of 500-600 m between half-hourly locations being not uncommon. Males occasionally showed a more regular pattern of movement possibly related to searching for oestrous females. Bettongs became active soon after dark. The number of hours spent active was greatest during May (79% of length of night) and lowest during November (93% of night). Bettongs occasionally rested at night between two bouts of activity. Nests are formed from a hollowed-out bundle of plant material and located under fallen trees, shrubs or logs, or under low shrubs or clumps of ground vegetation such as Lomandra. Individuals used 3-6 nests per 3-week tracking period. Nests were usually only used consecutively for one or two nights, and different nests were used to different extents. A different set of nests tended to be used in different months. Nests showed some tendency to be located at one end of the home range. Nesting areas used by different individuals overlapped.

scholarly journals Home range of the Tropidurid lizard Liolaemus lutzae: sexual and body size differences

1999 ◽  
Vol 59 (1) ◽  
pp. 125-130 ◽  
Author(s):  
C. F. D. ROCHA
Keyword(s):  
Body Size ◽  
Home Range ◽  
Mutual Exclusion ◽  
Home Range Size ◽  
Range Size ◽  
Home Ranges ◽  
Adult Males ◽  
Adult Females ◽  
The Mean ◽  
Janeiro State

The home range of the Tropidurid lizard Liolaemus lutzae, an endemic species of the costal sand dune habitats of Rio de Janeiro State, was studied in the beach habitat of Barra de Maricá restinga, Maricá County. Home ranges were studied using a mark-recapture technique in a delimited area at the beach habitat. I considered for estimates and analysis the home ranges of those lizards with a minimum of four positions. The size of L. lutzae home ranges varied according to the segment of the population. The mean home range size of adult males (x = 59.8 ± 33.7 m²) was significantly larger than that of adult females (x = 22.3 ± 16.1 m²). Juvenile mean home range size was significantly smaller than that of adult males, but did not differ from that of adult females (t = 1.058; p = 0.149). The overlap between male home ranges was usually low (3.6%), being in general only peripheral. Conversely, there was a considerable overlap between home ranges of adult females with those of adult males, the home range areas of two or three females being enclosed in the home range of one adult male. The small overlap between home ranges of adult males suggested mutual exclusion. The observed between-sex differences in the size of L. lutzae home range may be explained by the sexual dimorphism in body size in this species, and by the need of adult males to establish larger areas so as to include many females in their areas, during the reproductive season. The differences in home range along ontogeny probably result from differences in body size of the different segments of the population, due to trophic differences (carnivory and herbivory levels), and the dispersal of young after birth. Because L. lutzae is omnivorous, but primarily herbivorous when adult, and due to its sit-and-wait foraging behavior (mainly on arthropods), it does not need to move around over large areas to find food, which in turn reduces the area necessary for it to live.

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