Suchergebnisse

The hypothesis that disturbance from a shooting exercise using a helicopter will influence the behaviour of
surviving feral pigs, Sus scrofa, was tested on a population of radio-collared feral pigs in north-western
New South Wales. No significant differences existed in hourly distance moved by pigs, diel variation in
distance moved by pigs, or home-range size of pigs, between a radio-tracking session conducted
immediately before a shooting exercise from a helicopter and a radio-tracking session conducted during and
after the exercise. The position of the home ranges of feral pigs did not appear to be affected by the
shooting exercise, although several radio-collared feral pigs moved into and out of the study area between
tracking sessions. Overall, the results suggest that the disturbance caused by shooting has little effect on the
behaviour of surviving feral pigs.

The effect of harvest of magpie goose clutches on nest numbers and juvenile recruitment was investigated
experimentally within a single breeding colony, by comparing the densities of nests and offspring (eggs
and goslings) produced in harvested and unharvested blocks in each of two successive years. When
adjusted for initial differences in nest density, by covariance analysis, there were significantly higher
densities of nests in harvested blocks than in unharvested blocks, possibly due to re-laying in new
nests by those geese whose clutches were harvested. There were no differences in densities of offspring
produced between harvested and unharvested blocks although there were differences in densities of
offspring produced between years.

Guide to Contemporary Politics describes basic political ideas and some of the issues dividing the major parties in British politics. The book starts with basic descriptions of political theory, covering the foundations of democracy, the choice of government, and the machinery of political power found in the legislative, executive, and judicial branches of government. The book then cites example of clichés and common misconception about politics between a communist and a socialist. This is followed by discussions and interviews on the politics, differences, qualities, and some perceptions on

Context Reintroductions can be an effective means of re-establishing locally extinct or declining faunal populations. However, incomplete knowledge of variables influencing survival and establishment can limit successful outcomes. Aim We aimed to examine the factors (e.g. sex, body mass, release order) influencing the survival, dispersal, home range and habitat selection of reintroduced southern brown bandicoots (eastern subspecies; Isoodon obesulus obesulus) into an unfenced, predator-managed environment in south-eastern Australia (Booderee National Park). Methods Over 2 weeks in May 2016, six female and five male bandicoots were wild-caught in state forest and hard released into the park. Release locations were approximately evenly distributed between three primary vegetation types assessed as suitable habitat: heath, woodland and forest. Bandicoots were radio-tracked day and night for 4 weeks from the initial release date. Key results No mortality was detected. Males dispersed more than twice as far as females (male 704 m, female 332 m), but there was no significant sex bias in home range size. At the landscape scale, bandicoots preferentially selected home ranges that contained heath and avoided forest. Within home ranges, heath and woodland were both favoured over forest. Conclusions Post-release dispersal is sex-biased, but more data are required to determine the influence of other predictors such as body mass and release order. Within the release area, bandicoots favoured non-forest vegetation types. Implications Our study outlines factors influencing the establishment of reintroduced bandicoots. We recommend that future bandicoot reintroductions to Booderee National Park occur within areas of heath and woodland, and that subsequent releases consider the potentially larger spatial requirements and conspecific avoidance among male bandicoots. Our findings contribute new knowledge for improving translocation methods of a nationally endangered medium-sized mammal.

The response of terrestrial mammals and arboreal marsupials to past burning history as well as a year prior to, and then for 4 years after, a major wildfire in 2003 at Booderee National Park, Jervis Bay Territory was quantified. The present study encompassed extensive repeated surveys at a set of 109 replicated sites stratified by vegetation type and fire history. It was found that most species exhibited significant differences in presence and abundance between major vegetation types. Detections of long-nosed bandicoot (Perameles nasuta) increased significantly in all vegetation types surveyed, in both burnt and unburnt areas. Temporal patterns in captures of three species of small mammals (bush rat (Rattus fuscipes), swamp rat (Rattus lutreolus) and brown antechinus (Antechinus stuartii)) showed a trend for lower numbers of captures on burnt sites compared with unburnt sites. Three species of arboreal marsupials, common ringtail possum (Pseudocheirus peregrinus), greater glider (Petauroides volans) and common brushtail possum (Trichosurus vulpecula), were moderately common and all showed marked differences in abundance between vegetation types. Whereas P. peregrinus and P. volans exhibited a temporal decline between 2003 and 2006, T. vulpecula exhibited a general increase from 2003 levels. However, arboreal marsupial responses did not appear to be directly fire related.