Predicting home range size from the body mass or population densities of feral pigs,Sus scrofa(Artiodactyla: Suidae)

1999 ◽  
Vol 24 (5) ◽  
pp. 538-543 ◽  
Author(s):  
Glen Saunders ◽  
Steven McLeod
Keyword(s):  
Home Range ◽  
Body Mass ◽  
Sus Scrofa ◽  
Home Range Size ◽  
The Body ◽  
Range Size ◽  
Population Densities ◽  
Feral Pigs

Ecology and social biology of the southern three-banded armadillo (Tolypeutes matacus; Cingulata: Chlamyphoridae)

2020 ◽  
Author(s):  
N Attias ◽  
E Gurarie ◽  
W F Fagan ◽  
G Mourão
Keyword(s):  
Home Range ◽  
Body Mass ◽  
Conservation Status ◽  
Species Conservation ◽  
Home Range Size ◽  
Range Size ◽  
Basic Knowledge ◽  
Movement Behavior ◽  
Home Ranges ◽  
Social Biology

Abstract Basic knowledge of species biology and ecology is essential for the assessment of species conservation status and planning for efficient conservation strategies; however, this information is not always readily available. Here we use movement behavior to understand the ecology and social biology of the poorly known southern three-banded armadillo (Tolypeutes matacus). We used VHF and GPS telemetry to monitor 26 individuals from two sites in the Pantanal wetlands of Brazil. We characterized armadillo activity patterns, evaluated the relationship between sex and body mass with home range size and mean daily distance traveled, and examined home and core range overlap. Three-banded armadillos were active on average for 5.5 ± 2.8 h/day, with most of their activity concentrated in the first half of the night. Adult males were heavier and had larger home ranges than adult females. Home range size scaled positively with body mass for males, but not for females. Core ranges for females overlapped little (< 1%) regardless of age, but home ranges for males overlapped both with other males (12%) and females (18%). Our data suggest that three-banded armadillos are mainly a nocturnal species. Home range and spacing patterns point to a generally asocial behavior and a polygynous or promiscuous mating system. We hope that the data generated as a result of this project will contribute to this species’ conservation in Brazil and elsewhere by guiding future management and research efforts.

Body mass as a predictive variable of home-range size among Italian mammals and birds

2006 ◽  
Vol 269 (3) ◽  
pp. 317-330 ◽  
Author(s):  
D. Ottaviani ◽  
S. C. Cairns ◽  
M. Oliverio ◽  
L. Boitani
Keyword(s):  
Home Range ◽  
Body Mass ◽  
Home Range Size ◽  
Range Size ◽  
Predictive Variable

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 Growth and home range size of the gracile mouse opossum Gracilinanus microtarsus (Marsupialia: Didelphidae) in Brazilian cerrado

2010 ◽  
Vol 26 (2) ◽  
pp. 185-192 ◽  
Author(s):  
Fernanda Rodrigues Fernandes ◽  
Leonardo Dominici Cruz ◽  
Eduardo Guimarães Martins ◽  
Sérgio Furtado dos Reis
Keyword(s):  
Home Range ◽  
Body Mass ◽  
Information Criterion ◽  
Mass Gain ◽  
Home Range Size ◽  
Growth Patterns ◽  
Range Size ◽  
Minimum Convex Polygon ◽  
Mass Model ◽  
Proximate Cause

Abstract:Differences in growth patterns between the sexes of the gracile mouse opossum Gracilinanus microtarsus and the consequences for home range size were investigated in a savanna habitat (cerrado) of south-eastern Brazil. A total of 51 juvenile individuals of Gracilinanus microtarsus was monitored using capture–mark–recapture from November 2005 to August 2006. The increase in body mass of gracile mouse opossums was described using the Gompertz growth model. Male gracile mouse opossums grew faster than females (dimorphic ratio of 1.5). Home range size, estimated with the minimum convex polygon method, was positively related to body mass. Model selection using Akaike's Information Criterion (AICc) and incorporating body mass, sex and season as independent variables showed that the best-supported model describing variance in home range sizes included only body mass. Our data suggest that a greater body mass gain in juvenile males is probably the proximate cause of sexual dimorphism in adult gracile mouse opossums and that energetic needs required for growth have a greater influence in home range size.

scholarly journals Space use of wintering waterbirds in India: Influence of trophic ecology on home-range size

2014 ◽  
Vol 60 (5) ◽  
pp. 616-621
Author(s):  
Tsewang Namgail ◽  
John Y. Takekawa ◽  
Sivananinthaperumal Bala-Chandran ◽  
Ponnusamy Sathiyaselvam ◽  
Taej Mundkur ◽  
...  
Keyword(s):  
Home Range ◽  
Body Mass ◽  
Feeding Habits ◽  
Satellite Telemetry ◽  
Space Use ◽  
Home Range Size ◽  
Range Size ◽  
Home Ranges ◽  
Biological Traits ◽  
Indian States

Abstract Relationship between species’ home range and their other biological traits remains poorly understood, especially in migratory birds due to the difficulty associated with tracking them. Advances in satellite telemetry and remote sensing techniques have proved instrumental in overcoming such challenges. We studied the space use of migratory ducks through satellite telemetry with an objective of understanding the influence of body mass and feeding habits on their home-range sizes. We marked 26 individuals, representing five species of migratory ducks, with satellite transmitters during two consecutive winters in three Indian states. We used kernel methods to estimate home ranges and core use areas of these waterfowl, and assessed the influence of body mass and feeding habits on home-range size. Feeding habits influenced the home-range size of the migratory ducks. Carnivorous ducks had the largest home ranges, herbivorous ducks the smallest, while omnivorous species had intermediate home-ranges. Body mass did not explain variation in home-range size. To our knowledge, this is the first study of its kind on migratory ducks, and it has important implications for their conservation and management.

Home range and spatial organisation of rock-dwelling carnivorous marsupial, Pseudantechinus macdonnellensis

2003 ◽  
Vol 30 (2) ◽  
pp. 135 ◽  
Author(s):  
Chris R. Pavey ◽  
Nicola Goodship ◽  
Fritz Geiser
Keyword(s):  
Home Range ◽  
Arid Zone ◽  
Home Range Size ◽  
The Body ◽  
Range Size ◽  
Spatial Organisation ◽  
Fixed Kernel ◽  
Maximum Range ◽  
Rocky Habitats ◽  
Range Length

We studied home-range size, range length and spatial organisation of fat-tailed false antechinus, Pseudantechinus macdonnellensis, at Ormiston Creek, central Australia. Animals were tracked using transmitters implanted into the body cavity. Mean home-range size was 0.76 ha based on the minimum convex polygon (MCP) method and 1.14 ha based on the fixed kernel method (95% contour). Mean size of core areas of the home range was 0.07 ha based on the 50% kernel contour. Mean maximum range length was 148.83 m. Males occupied larger home-range areas than females (MCP: 0.98 v. 0.31 ha, 95% fixed kernel: 1.50 v. 0.43 ha) and also had greater maximum range lengths (180 v. 86 m). Home-range areas showed little overlap within the sexes; however, ranges of males overlapped those of females by an average of 37.95%. By comparison with data from a previous mark–recapture study at the same site, radio-tracking produced home-range estimates (MCP) that were greater by a factor of 24.5 for males and 15.5 for females, whereas maximum range lengths were lower for females, but similar for males. The results of this study support the proposition that the rock-dwelling P. macdonnellensis has a more stable home range and undergoes fewer long-range movements than similar-sized arid-zone dasyurids that occupy open environments. These differences likely result from the stability in resources provided by rocky habitats, specifically year-round availability of insects, availability of plentiful shelter sites that are very effective thermal buffers in both summer and winter, and a diversity of accessible microclimates.

The Effect of an Intensive Shooting Exercise From a Helicopter on the Behaviour of Surviving Feral Pigs.

1996 ◽  
Vol 23 (4) ◽  
pp. 435 ◽  
Author(s):  
N Dexter
Keyword(s):  
Home Range ◽  
Sus Scrofa ◽  
New South ◽  
Home Range Size ◽  
Home Ranges ◽  
Diel Variation ◽  
Radio Tracking ◽  
Feral Pigs ◽  
South Wales ◽  
North Western

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.

scholarly journals Sexual, allometric and forest cover effects on giant anteaters’ movement ecology

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0253345
Author(s):  
Aline Giroux ◽  
Zaida Ortega ◽  
Luiz Gustavo Rodrigues Oliveira-Santos ◽  
Nina Attias ◽  
Alessandra Bertassoni ◽  
...  
Keyword(s):  
Home Range ◽  
Body Mass ◽  
Forest Cover ◽  
Movement Patterns ◽  
Space Use ◽  
Home Range Size ◽  
Range Size ◽  
Extreme Weather Events ◽  
Environmental Drivers

Knowing the influence of intrinsic and environmental traits on animals’ movement is a central interest of ecology and can aid to enhance management decisions. The giant anteater (Myrmecophaga tridactyla) is a vulnerable mammal that presents low capacity for physiological thermoregulation and uses forests as thermal shelters. Here, we aim to provide reliable estimates of giant anteaters’ movement patterns and home range size, as well as untangle the role of intrinsic and environmental drivers on their movement. We GPS-tracked 19 giant anteaters in Brazilian savannah. We used a continuous-time movement model to estimate their movement patterns (described by home range crossing time, daily distance moved and directionality), and provide an autocorrelated kernel density estimate of home range size. Then, we used mixed structural equations to integratively model the effects of sex, body mass and proportion of forest cover on movement patterns and home range size, considering the complex net of interactions between these variables. Male giant anteaters presented more intensive space use and larger home range than females with similar body mass, as it is expected in polygynous social mating systems. Males and females increased home range size with increasing body mass, but the allometric scaling of intensity of space use was negative for males and positive for females, indicating different strategies in search for resources. With decreasing proportion of forest cover inside their home ranges, and, consequently, decreasing thermal quality of their habitat, giant anteaters increased home range size, possibly to maximize the chances of accessing thermal shelters. As frequency and intensity of extreme weather events and deforestation are increasing, effective management efforts need to consider the role of forests as an important thermal resource driving spatial requirements of this species. We highlight that both intrinsic and environmental drivers of animal movement should be integrated to better guide management strategies.

The influence of pasture distribution, temperature and sex on home-range size of feral pigs in a semi-arid environment

1999 ◽  
Vol 26 (6) ◽  
pp. 755 ◽  
Author(s):  
Nick Dexter
Keyword(s):  
Home Range ◽  
Radio Telemetry ◽  
Arid Environment ◽  
Home Range Size ◽  
Range Size ◽  
Maximum Temperature ◽  
Home Ranges ◽  
Feral Pigs ◽  
South Wales ◽  
Semi Arid

In this study the home-range sizes of feral pigs (Sus scrofa) at Nocoleche Nature Reserve, semi-arid New South Wales were measured by radio-telemetry over the course of a drought. The abundance of food was indexed simultaneously by the amount of pasture in the four most common habitats at Nocoleche (shrubland, woodland, riverine woodland, and ephemeral swamps). The influence of the pig's sex, and mean maximum temperature and pasture biomass on the home-range size of pigs were examined using ANOVA and multiple regression, respectively. Mean home-range size of males was 7.9–11.6 km2 and that for females was 4.2–8.0 km2 . Males had significantly larger home ranges than females, and their home-range size did not change significantly over the course of the drought. In contrast, the size of the home ranges of females changed significantly and was correlated negatively with the abundance of pasture biomass in shrublands and mean maximum temperature, and positively with the abundance of pasture biomass in ephemeral swamps. The conclusion from this study is that males maintained a large, unvarying, home range to maximise access to females while females changed their home-range size according the abundance of food and the constraints of high temperature.

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