Explicit spatial modelling of territories
Talk outline:
- A mathematical approach to modeling movement patterns, signalling
and response behaviors.
- I will discuss one approach to modeling explicit spatial and temporal
aspects of behavior, using wolf territorial interactions and
scent-marking as an example. The result is a model that describes
changing probability density functions for the locations of
individuals. Territories typically arise from the interactions and
are not assumed a priori. The model is then used to understand the
effect of behavioral rules on territory formation.
- Deriving models explicitly from data vs. modeling based on
behavioral assumptions.
-
It is possible to simply assume a basic class of models and to then
attempt to fit the data. The other possibility is to make explicit
assumptions about behavioral responses. Both approaches can lead to
similar models (such as diffusion convection equations), but answer
very different questions.
- Interactions between territorial predators and a prey population.
-
I will focus on how territoriality can affect predator prey
interactions. I will discuss buffer zones between territories acting
as prey refuges, and the effect that prey distribution may have on the
process of territorial pattern formation. The organisms discussed
will be wolves and white-tailed deer in NE Minnesota.
- Optimizing movement behavior when competing for a spatially
distributed resource.
-
I will discuss how optimal control theory can be used to formulate a
game where territorial individuals interact with interference and
exploitation competition.
Assigned reading:
M.A. Lewis and J.D. Murray. Modelling territoriality and wolf-deer
interactions. Nature vol 366 738-740. 1993.
M.A. Lewis, K.J. White, and J.D. Murray. Analysis of a model for
territorial pattern formation in wolves. This should be available
>From http://www.math.utah.edu/~mlewis by the end of October.