Ideal free distribution and natal dispersal in female roe deer

Oecologia ◽  
1995 ◽  
Vol 103 (3) ◽  
pp. 302-308 ◽  
Author(s):  
L. Kjell Walhström ◽  
Petter Kjellander
Keyword(s):  
Roe Deer ◽  
Ideal Free Distribution ◽  
Natal Dispersal ◽  
Free Distribution ◽  
Ideal Free

scholarly journals Evolution of Natal Dispersal in Spatially Heterogenous Environments

2016 ◽  
Author(s):  
Robert Stephen Cantrell ◽  
Chris Cosner ◽  
Yuan Lou ◽  
Sebastian J. Schreiber
Keyword(s):  
Growth Rates ◽  
Continuous Time ◽  
Ideal Free Distribution ◽  
Natal Dispersal ◽  
Breeding Dispersal ◽  
Dispersal Strategy ◽  
Free Distribution ◽  
Per Capita ◽  
Source Sink ◽  
Ideal Free

AbstractUnderstanding the evolution of dispersal is an important issue in evolutionary ecology. For continuous time models in which individuals disperse throughout their lifetime, it has been shown that a balanced dispersal strategy, which results in an ideal free distribution, is evolutionary stable in spatially varying but temporally constant environments. Many species, however, primarily disperse prior to reproduction (natal dispersal) and less commonly between reproductive events (breeding dispersal). These species include territorial species such as birds and reef fish, and sessile species such as plants, and mollusks. As demographic and dispersal terms combine in a multiplicative way for models of natal dispersal, rather than the additive way for the previously studied models, we develop new mathematical methods to study the evolution of natal dispersal for continuous-time and discrete-time models. A fundamental ecological dichotomy is identified for the non-trivial equilibrium of these models: (i) the per-capita growth rates for individuals in all patches are equal to zero, or (ii) individuals in some patches experience negative per-capita growth rates, while individuals in other patches experience positive per-capita growth rates. The first possibility corresponds to an ideal-free distribution, while the second possibility corresponds to a “source-sink” spatial structure. We prove that populations with a dispersal strategy leading to an ideal-free distribution displace populations with dispersal strategy leading to a source-sink spatial structure. When there are patches which can not sustain a population, ideal-free strategies can be achieved by sedentary populations, and we show that these populations can displace populations with any irreducible dispersal strategy. Collectively, these results support that evolution selects for natal or breeding dispersal strategies which lead to ideal-free distributions in spatially heterogenous, but temporally homogenous, environments.

scholarly journals Swift Foxes and Ideal Free Distribution: Relative Influence of Vegetation and Rodent Prey Base on Swift Fox Survival, Density, and Home Range Size

ISRN Zoology ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Craig M. Thompson ◽  
Eric M. Gese
Keyword(s):  
Home Range ◽  
Landscape Heterogeneity ◽  
Ideal Free Distribution ◽  
Survival Rates ◽  
Home Range Size ◽  
Range Size ◽  
Distribution Model ◽  
Free Distribution ◽  
Swift Fox ◽  
Ideal Free

Swift foxes (Vulpes velox) are an endemic mesocarnivore of North America subject to resource and predation-based pressures. While swift fox demographics have been documented, there is little information on the importance of top-down versus bottom-up pressures or the effect of landscape heterogeneity. Using a consumable resource-based ideal free distribution model as a conceptual framework, we isolated the effects of resource-based habitat selection on fox population ecology. We hypothesized if swift fox ecology is predominantly resource dependant, distribution, survival, and space use would match predictions made under ideal free distribution theory. We monitored survival and home range use of 47 swift foxes in southeastern Colorado from 2001 to 2004. Annual home range size was 15.4 km2, and seasonal home range size was 10.1 km2. At the individual level, annual home range size was unrelated to survival. Estimates of fox density ranged from 0.03 to 0.18 foxes/km2. Seasonal survival rates were 0.73 and 1.0 and did not differ seasonally. Foxes conformed to the predictions of the ideal free distribution model during winter, indicating foxes are food stressed and their behavior governed by resource acquisition. During the rest of the year, behavior was not resource driven and was governed by security from intraguild predation.

Foraging behaviour in tadpoles of the bronze frogRana temporalis: Experimental evidence for the ideal free distribution

2004 ◽  
Vol 29 (2) ◽  
pp. 201-207 ◽  
Author(s):  
Dheeraj K. Veeranagoudar ◽  
Bhagyashri A. Shanbhag ◽  
Srinivas K. Saidapur
Keyword(s):  
Experimental Evidence ◽  
Foraging Behaviour ◽  
Ideal Free Distribution ◽  
Free Distribution ◽  
Ideal Free ◽  
The Ideal

Aggregation and the `Ideal Free' Distribution

10.2307/4456 ◽  
1983 ◽  
Vol 52 (3) ◽  
pp. 821 ◽  
Author(s):  
William J. Sutherland
Keyword(s):  
Ideal Free Distribution ◽  
Free Distribution ◽  
Ideal Free ◽  
The Ideal
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