1. Department
of Civil Engineering, University of New Mexico, Albuquerque, New Mexico 87131 United States
2. Department
of Biology, University of New Mexico, Albuquerque, New Mexico 87131 United States
3. Department
of Economics, University of New Mexico, Albuquerque, New Mexico 87131 United States
4. Division
of Biology, Kansas State University, Manhattan, Kansas 66506 United States