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Full-Text Articles in Biology
Optimal Foraging: A Selective Review Of Theory And Tests, G.H. Pyke, H.R. Pulliam, Eric Charnov
Optimal Foraging: A Selective Review Of Theory And Tests, G.H. Pyke, H.R. Pulliam, Eric Charnov
Biology Faculty & Staff Publications
Beginning with Emlen (1966) and MacArthur and Pianka (1966) and extending through the last ten years, several authors have sought to predict the foraging behavior of animals by menas of mathematical models. These models are very similar, in that they all assume that the fitness of a foraging animal is a function of the efficiency of foraging measured in terms of some "currency" (Schoener, 1971) - usually energy - and that natural selection has resulted in animals that forage so as to maximize this fitness. As a result of these similarities, the models have become known as "optimal foraging models"; …
When Is Sex Environmentally Determined?, Eric Charnov, James Bull
When Is Sex Environmentally Determined?, Eric Charnov, James Bull
Biology Faculty & Staff Publications
No abstract provided.
Optimal Prey Selection In The Great Tit (Parus Major), John Krebs, Jonathan Erichsen, Michael Webber, Eric Charnov
Optimal Prey Selection In The Great Tit (Parus Major), John Krebs, Jonathan Erichsen, Michael Webber, Eric Charnov
Biology Faculty & Staff Publications
We tested the predictions of an optimal foraging model using five captive great tits as predators. The birds were presented with two prey types, profitable and unprofitable, on a moving belt. Both prey types were made out of mealworms. When the encounter rate with both prey types was low, the birds were non-selective, but at a higher encounter rate with profitable prey, the birds selectively ignored the less profitable type and did so irrespective of the encounter rate with them. These results are as predicted by the model, but the birds did not as predicted change from no selection in …