A policymaker perspective on use of a population density estimate to manage cougar harvest risk (Beausoleil et al. 2021): A reply to Thorburn

2021 ◽  
Author(s):  
Richard A. Beausoleil ◽  
Lindsay S. Welfelt ◽  
Ilai N. Keren ◽  
Brian N. Kertson ◽  
Benjamin T. Maletzke ◽  
...  
Keyword(s):  
Population Density ◽  
Density Estimate ◽  
Population Density Estimate

scholarly journals A Population Density Estimate of the Chimpanzee in the Haut-Niger National Park, Republic of Guinea

2002 ◽  
Vol 9 (1) ◽  
pp. 1-3 ◽  
Author(s):  
Marie-Claire Fleury-Brugiere ◽  
David Brugiere
Keyword(s):  
Population Density ◽  
National Park ◽  
Density Estimate ◽  
Republic Of Guinea ◽  
Population Density Estimate

Population density estimate of leopards (Panthera pardus) in north-western Mpumalanga, South Africa, determined using spatially explicit capture–recapture methods

2021 ◽  
Author(s):  
Declan R. Morris ◽  
Wayne S. J. Boardman ◽  
Lourens H. Swanepoel ◽  
Greg Simpson ◽  
Jannie Coetzee ◽  
...  
Keyword(s):  
South Africa ◽  
Population Density ◽  
Density Estimate ◽  
Spatially Explicit ◽  
Panthera Pardus ◽  
Capture Recapture ◽  
Population Density Estimate ◽  
North Western

Melanistic leopards reveal their spots: Infrared camera traps provide a population density estimate of leopards in malaysia

2015 ◽  
Vol 79 (5) ◽  
pp. 846-853 ◽  
Author(s):  
Laurie Hedges ◽  
Wai Yee Lam ◽  
Ahimsa Campos-Arceiz ◽  
D. Mark Rayan ◽  
William F. Laurance ◽  
...  
Keyword(s):  
Population Density ◽  
Infrared Camera ◽  
Camera Traps ◽  
Density Estimate ◽  
Population Density Estimate

scholarly journals Responses of Sunda clouded leopard Neofelis diardi population density to anthropogenic disturbance: refining estimates of its conservation status in Sabah

Oryx ◽  
2017 ◽  
Vol 53 (4) ◽  
pp. 643-653 ◽  
Author(s):  
Andrew J. Hearn ◽  
Joanna Ross ◽  
Henry Bernard ◽  
Soffian A. Bakar ◽  
Benoit Goossens ◽  
...  
Keyword(s):  
Population Density ◽  
Anthropogenic Disturbance ◽  
Management Practices ◽  
Anthropogenic Impacts ◽  
Conservation Status ◽  
Species Abundance ◽  
Clouded Leopard ◽  
Capture Recapture ◽  
Population Density Estimate ◽  
Malaysian Borneo

AbstractExtensive areas of tropical forests have been, and continue to be, disturbed as a result of selective timber extraction. Although such anthropogenic disturbance typically results in the loss of biodiversity, many species persist, and their conservation in production landscapes could be enhanced by a greater understanding of how biodiversity responds to forest management practices. We conducted intensive camera-trap surveys of eight protected forest areas in Sabah, Malaysian Borneo, and developed estimates of Sunda clouded leopard Neofelis diardi population density from spatially explicit capture–recapture analyses of detection data to investigate how the species’ abundance varies across the landscape and in response to anthropogenic disturbance. Estimates of population density from six forest areas were 1.39–3.10 individuals per 100 km2. Our study provides the first evidence that the population density of the Sunda clouded leopard is negatively affected by hunting pressure and forest fragmentation, and that among selectively logged forests, time since logging is positively associated with abundance. We argue that these negative anthropogenic impacts could be mitigated with improved logging practices, such as reducing the access of poachers by effective gating and destruction of road access points, and by the deployment of anti-poaching patrols. By calculating a weighted mean population density estimate from estimates developed here and from the literature, and by extrapolating this value to an estimate of current available habitat, we estimate there are 754 (95% posterior interval 325–1,337) Sunda clouded leopards in Sabah.

scholarly journals Extensive aquatic subsidies lead to territorial breakdown and high density of an apex predator

2021 ◽  
Author(s):  
Charlotte E Eriksson ◽  
Daniel L.Z Kantek ◽  
Selma S Miyazaki ◽  
Ronaldo G Morato ◽  
Manoel dos Santos-Filho ◽  
...  
Keyword(s):  
Population Density ◽  
Social Interactions ◽  
Aquatic Ecosystems ◽  
Camera Traps ◽  
Apex Predator ◽  
Gps Collars ◽  
Seasonally Flooded ◽  
Population Density Estimate ◽  
Brazilian Pantanal ◽  
Solitary Behavior

Energetic subsidies between terrestrial and aquatic ecosystems can strongly influence food webs and population dynamics. Our objective was to study how aquatic subsidies affected jaguar (Panthera onca) diet, sociality, and population density in a seasonally flooded protected area in the Brazilian Pantanal. The diet (n = 138 scats) was dominated by fish (46%) and aquatic reptiles (55%), representing the first jaguar population known to feed extensively on fish and to minimally consume mammals (11%). These aquatic subsidies supported the highest jaguar population density estimate to date (12.4 per 100 km2) derived from camera traps (8,065 trap nights) and GPS collars (n = 13). Contrary to their mostly solitary behavior elsewhere, we documented social interactions previously unobserved between same-sex adults including cooperative fishing, co-traveling, and play. Our research demonstrates that aquatic subsidies seen in omnivores can be highly influential to obligate carnivores leading to high population density and altered social structure.

Population density of migratory and resident brown trout (Salmo trutta) in relation to altitude: evidence for a migration cost

2001 ◽  
Vol 70 (1) ◽  
pp. 112-121 ◽  
Author(s):  
T. Bohlin ◽  
J. Pettersson ◽  
E. Degerman
Keyword(s):  
Population Density ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Migration Cost ◽  
Brown Trout Salmo Trutta

Mouse population eruptions in New Zealand forests: the role of population density and seedfall

2000 ◽  
Vol 69 (6) ◽  
pp. 1058-1070 ◽  
Author(s):  
David Choquenot ◽  
Wendy A. Ruscoe
Keyword(s):  
New Zealand ◽  
Population Density ◽  
Mouse Population

Convergence of regional population density in Russia over 120 years

2020 ◽  
pp. 133-158
Author(s):  
K. A. Kholodilin ◽  
Y. I. Yanzhimaeva
Keyword(s):  
Population Density ◽  
Spatial Dependence ◽  
Population Distribution ◽  
Regional Level ◽  
Capital City ◽  
County Level ◽  
Spatial Effects ◽  
Russian Regions ◽  
Regional Population ◽  
Regional Population Density

A relative uniformity of population distribution on the territory of the country is of importance from socio-economic and strategic perspectives. It is especially important in the case of Russia with its densely populated West and underpopulated East. This paper considers changes in population density in Russian regions, which occurred between 1897 and 2017. It explores whether there was convergence in population density and what factors influenced it. For this purpose, it uses the data both at county and regional levels, which are brought to common borders for comparability purposes. Further, the models of unconditional and conditional β-convergence are estimated, taking into account the spatial dependence. The paper concludes that the population density equalization took place in 1897-2017 at the county level and in 1926—1970 at the regional level. In addition, the population density increase is shown to be influenced not only by spatial effects, but also by political and geographical factors such as climate, number of GULAG camps, and the distance from the capital city.

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