Article ID: | iaor20032850 |
Country: | United States |
Volume: | 159 |
Issue: | 4 |
Start Page Number: | 372 |
End Page Number: | 387 |
Publication Date: | Apr 2002 |
Journal: | American Naturalist |
Authors: | Zabel R.W. |
Keywords: | transportation: general |
For migratory species, duration of migration, or ‘travel time’, is often a critical variable in determining the cost of migration. Observed travel times are the result of both environmental factors such as air or water currents and the behavior of individuals. In an effort to distinguish among these components, I developed a migration model based on an advection–diffusion equation that characterizes population movements in terms of two biologically meaningful parameters: migration rate and rate of population spread. I applied the model to travel time data from juvenile chinook salmon (