scholarly journals Conservation introduction of the threatened Apennine chamois Rupicapra pyrenaica ornata: post-release dispersal differs between wild-caught and captive founders

Oryx ◽  
2014 ◽  
Vol 50 (1) ◽  
pp. 128-133 ◽  
Author(s):  
A. Bocci ◽  
S. Menapace ◽  
S. Alemanno ◽  
S. Lovari
Keyword(s):  
Global Positioning System ◽  
Release Site ◽  
Home Ranges ◽  
Age Classes ◽  
Central Apennines ◽  
Rupicapra Pyrenaica ◽  
Global Positioning ◽  
Movement Frequency ◽  
In The Wild ◽  
Selection Of

AbstractSixteen Apennine chamois Rupicapra pyrenaica ornata (10 females, 6 males) were released into a protected area, the Sibillini Mountains National Park, Central Apennines, Italy, and monitored using global positioning system radio tags during 2008–2010. Founders caught in the wild (n = 8) and those reared in large enclosures (n = 8) differed in movement frequency (inter-fix distance per hour) and maximum distance covered (from the release site) in the first 5 months after release: both were significantly greater in wild individuals, males moved significantly more than females, wild individuals shifted their home ranges significantly more often than captive ones, and no differences were observed between the sexes or age classes. A mixed strategy of selection of wild and captive founders has proven successful in preventing large movements in the initial stages of release yet still providing sufficient opportunity to avoid inbreeding depression.

Observations on Activity Patterns, Population and Den Characteristics of The Water Rat Hydromys chrysogaster Along Badger Creek, Victoria.

1995 ◽  
Vol 18 (1) ◽  
pp. 71
Author(s):  
J.L. Gardner ◽  
M. Serena
Keyword(s):  
Population Density ◽  
Activity Patterns ◽  
Home Ranges ◽  
Adult Males ◽  
Fish Farms ◽  
Age Classes ◽  
Irrigation Channels ◽  
In Captivity ◽  
In The Wild ◽  
Hydromys Chrysogaster

The Water Rat Hydromys chrysogaster is Australia's largest amphibious rodent, occupying freshwater rivers, lakes, and coastal and estuarine habitats throughout the continent (Watts and Aslin 1981). Little is known of the species' social organisation or use of space in the wild although Harris (1978) suggested that adults might be intrasexually aggressive. The home ranges of all sex and age classes overlap to some extent but home ranges of adults of the same sex appear to overlap less (Harris 1978). Adult males occupy the largest home ranges which overlap those of one or more females. In captivity individuals kept in groups form hierarchies in which only the dominant females usually breed successfully (Olsen 1982). Fighting occurs primarily among males, with the highest incidence of injuries observed at the beginning of the main September-March breeding season (Olsen 1980, 1982). The results of trapping studies indicate that population density may vary considerably, with the greatest numbers of animals typically occupying man-modified habitats such as irrigation channels or fish farms (McNally 1960, Watts and Aslin 1981, Smales 1984). Aggressive behaviour appears to be related to pelage colour (phenotype) and population density; the higher the density the greater the number of injured individuals (Olsen 1980).

scholarly journals Optimal observational planning of local GPS networks: assessing an analytical method

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
H. Mehrabi ◽  
B. Voosoghi
Keyword(s):  
Global Positioning System ◽  
Analytical Method ◽  
Cost Reduction ◽  
Operational Research ◽  
Field Work ◽  
Programming Algorithm ◽  
Positioning System ◽  
Global Positioning ◽  
Gps Networks ◽  
Selection Of

AbstractPrecision, reliability and cost are the major criteria applied in optimization and design of geodetic networks. The terrestrial networks are being replaced quickly by permanent and campaign Global Positioning System (GPS) networks. These networks must be optimized using the same three criteria. In this article the optimization of the observational plan of local GPS networks (Second Order Design (SOD)) is considered using the precision criterion. This study is limited to the selection of optimal numbers and the best distribution of the non-trivial baselines throughout the network. This objective is accomplished based on the SOD solution through the analytical method in operational research by the means of quadratic programming algorithm. This presented method is tested on a real GPS network and appears to be a useful technique in terms of cost reduction in the field work by the provided observational plan and optimal distribution of the baselines throughout the network. Results indicate that weights of almost 36% of the baselines are negligiblewhen compared to the weights of the rest of the baselines; therefore, they could be eliminated fromthe observational plan, resulting in a 36% saving in the fieldwork cost.

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.

Behavioral responses of white-tailed deer subjected to lethal management

2008 ◽  
Vol 86 (12) ◽  
pp. 1358-1366 ◽  
Author(s):  
Scott C. Williams ◽  
Anthony J. DeNicola ◽  
Isaac M. Ortega
Keyword(s):  
Global Positioning System ◽  
Behavioral Changes ◽  
Home Ranges ◽  
Population Reduction ◽  
Global Positioning ◽  
Lethal Management ◽  
Cost Efficient ◽  
Range Overlap ◽  
Free Ranging ◽  
Interaction Behaviors

Currently, the most effective and cost-efficient mechanism for controlling overabundant white-tailed deer ( Odocoileus virginianus (Zimmermann, 1780)) is lethal removal, most commonly controlled hunting and sharpshooting. Deer subjected to such efforts may behave differently during removal and remaining deer may alter behaviors, potentially limiting future efficacy of removal efforts. Our objectives were to quantify changes in deer distribution in response to controlled hunting and sharpshooting. We immobilized two sample populations of 20 deer (one enclosed and one free-ranging) in central New Jersey, USA, and fitted them with global positioning system collars. The free-ranging herd experienced 11 days of controlled hunting, reducing density from 78 to 27 deer/km2. We subjected the enclosed herd to a 7 day sharpshoot, reducing density from 83 to 7 deer/km2. Hunted deer increased mean home ranges during removal, while deer exposed to sharpshooting did not. Collared doe–doe home-range overlap increased postsharpshoot, suggesting increased social interaction. Behaviors of hunted deer were directly affected by the human threat, while behavioral changes of deer exposed to sharpshooting were linked to population reduction. In the absence of an intact matrilineal social group, unrelated does will seek each other out in what appears to be an inherent need to be social.

Evidence for localized active extension in the central Apennines (Italy) from global positioning system observations

Geology ◽  
2011 ◽  
Vol 39 (4) ◽  
pp. 291-294 ◽  
Author(s):  
N. D'Agostino ◽  
S. Mantenuto ◽  
E. D'Anastasio ◽  
R. Giuliani ◽  
M. Mattone ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Positioning System ◽  
Central Apennines ◽  
Global Positioning

scholarly journals Post-Release Monitoring of Western Grey Kangaroos (Macropus fuliginosus) Relocated from an Urban Development Site

Animals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1914
Author(s):  
Mark Cowan ◽  
Mark Blythman ◽  
John Angus ◽  
Lesley Gibson
Keyword(s):  
Urban Development ◽  
Global Positioning System ◽  
High Frequency ◽  
Urban Areas ◽  
Camera Traps ◽  
Home Ranges ◽  
Very High Frequency ◽  
Global Positioning ◽  
Development Site ◽  
Very High

The expansion of urban areas and associated clearing of habitat can have severe consequences for native wildlife. One option for managing wildlife in these situations is to relocate them. While there is a general perception that relocation is humane, transparency of outcomes is lacking. Here, we document the outcome of 122 western grey kangaroos (Macropus fuliginosus) relocated from an urban development site on the edge of Perth, Western Australia. Global Positioning System (GPS) or Very High Frequency (VHF) collars were fitted to 67 kangaroos, and their survival and movement were monitored over 12 months using telemetry, camera traps and spotlighting. Only six collared animals survived for the duration of the study with most dying within a week of the relocation, indicating stress associated with capture as the likely cause. By the completion of the study, 111 kangaroos were predicted to have died based on the proportion of individuals known to have died. Movement patterns of surviving GPS collared kangaroos changed over time from largely exploratory forays, to more repeated movements between focus areas within home ranges. The poor outcome here raises concerns around the viability of relocating a relatively large number of kangaroos as a management option. It also highlights the need for careful planning to limit the stress associated with capture and transport if relocations are to be used for managing kangaroos in urban areas.

scholarly journals GPS baseline configuration design based on robustness analysis

2012 ◽  
Vol 2 (3) ◽  
pp. 234-239 ◽  
Author(s):  
M. Yetkin ◽  
M. Berber
Keyword(s):  
Global Positioning System ◽  
Robustness Analysis ◽  
Cost Effective ◽  
Statistical Testing ◽  
Configuration Design ◽  
Global Positioning ◽  
Significance Levels ◽  
Robustness Criterion ◽  
The Relationship ◽  
Selection Of

AbstractThe robustness analysis results obtained from a Global Positioning System (GPS) network are dramatically influenced by the configurationof the observed baselines. The selection of optimal GPS baselines may allow for a cost effective survey campaign and a sufficiently robustnetwork. Furthermore, using the approach described in this paper, the required number of sessions, the baselines to be observed, and thesignificance levels for statistical testing and robustness analysis can be determined even before the GPS campaign starts. In this study, wepropose a robustness criterion for the optimal design of geodetic networks, and present a very simple and efficient algorithm based on thiscriterion for the selection of optimal GPS baselines. We also show the relationship between the number of sessions and the non-centralityparameter. Finally, a numerical example is given to verify the efficacy of the proposed approach.

A review of home-range studies on Australian terrestrial vertebrates: adequacy of studies, testing of hypotheses, and relevance to conservation and international studies

2015 ◽  
Vol 63 (2) ◽  
pp. 136 ◽  
Author(s):  
Ross L. Goldingay
Keyword(s):  
Home Range ◽  
Short Duration ◽  
Global Positioning System ◽  
Best Practice ◽  
Home Ranges ◽  
International Studies ◽  
Minimum Convex Polygon ◽  
Terrestrial Vertebrates ◽  
Global Positioning ◽  
Frequent Criticism

Describing the spatial requirements of animals is central to understanding their ecology and conservation needs. I reviewed 115 studies describing the home ranges of Australian terrestrial vertebrates that were published during 2001–12. Understanding the features that characterise best practice can guide future studies. I aimed to: evaluate the adequacy of these studies, examine the use of current analysis techniques, examine the application of home-range knowledge to species’ management, and examine hypotheses that seek to explain the size and location of home ranges. The reviewed studies were unevenly distributed across taxa with a majority (68%) involving mammals compared with birds (12%), reptiles (19%) and frogs (1%). Many studies had various shortcomings, suggesting that they had not fully described home ranges; many (41%) involved 10 or fewer individuals, ≤50 locations per individual (44%), and spanned periods of ≤3 months (46%). Studies of short duration risk underestimating home-range area and overlooking seasonal habitat use. Global positioning system telemetry was used in 10% of Australian studies. Many were also of short duration. Despite frequent criticism in the literature, the Minimum Convex Polygon was the most frequently used home-range estimator (84% of studies), followed by the Fixed Kernel (45% of studies). Applying knowledge of home ranges appears to be underappreciated, with only 39% of studies explicitly aiming to address management or conservation issues. Only three studies tested hypotheses that may explain home-range characteristics. Resource (food and shelter) distribution and, in one case, its heterogeneity, shaped home-range characteristics. I found that most studies use the term ‘home range’ in an indiscriminate way. Only 11% of studies within the international literature used qualifying terms (e.g. seasonal, annual). Tracking period is shown to influence home-range estimates. Therefore, I recommend that qualifying terms be used more frequently to avoid confusion when referring to animal home ranges.

GPS and GSM Based Tracking System for Objects Moving over Wide Geographical Areas

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Fatima Ameen ◽  
Ziad Mohammed ◽  
Abdulrahman Siddiq
Keyword(s):  
Global Positioning System ◽  
Mobile Communications ◽  
Moving Objects ◽  
Tracking System ◽  
Geographical Area ◽  
Tracking Systems ◽  
Acceptable Result ◽  
Internet Service ◽  
Global Positioning ◽  
Tracking Objects

Tracking systems of moving objects provide a useful means to better control, manage and secure them. Tracking systems are used in different scales of applications such as indoors, outdoors and even used to track vehicles, ships and air planes moving over the globe. This paper presents the design and implementation of a system for tracking objects moving over a wide geographical area. The system depends on the Global Positioning System (GPS) and Global System for Mobile Communications (GSM) technologies without requiring the Internet service. The implemented system uses the freely available GPS service to determine the position of the moving objects. The tests of the implemented system in different regions and conditions show that the maximum uncertainty in the obtained positions is a circle with radius of about 16 m, which is an acceptable result for tracking the movement of objects in wide and open environments.

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