“…A reliance on optimality modeling allows for a direct quantitative evaluation of the costs and benefits of pursuing different options. Models derived from behavioral ecology often focus on simple questions about foraging behavior such as what to eat (diet breadth) and when to leave a patch (patch choice and the marginal value theorem), but more complex types of behavior can also be fruitfully addressed with these models (Beck et al, 2002;Bird and Bliege Bird, 2000;Elston, 1992;Elston and Zeanah, 2002;Fitzhugh, 2001;Gremillion, 2002;Kelly, 1995;Madsen et al, 2000;Madsen and Schmitt, 1998;Winterhalder and Smith, 2000 ;Winterhalder et al, 1999;Zeanah, 2000).…”