Publications
| a test of the acoustic adaptation hypothesis in four species of marmots. | acoustic signals must be transmitted from a signaller to a receiver during which time they become modified. the acoustic adaptation hypothesis suggests that selection should shape the structure of long-distance signals to maximize transmission through different habitats. a specific prediction of the acoustic adaptation hypothesis is that long-distance signals of animals in their native habitat are expected to change less during transmission than non-native signals within that habitat. this predi ... | 1998 | 9933550 |
| effects of tourists on behavior and demography of olympic marmots. | if changes in animal behavior resulting from direct human disturbance negatively affect the persistence of a given species or population, then these behavioral changes must necessarily lead to reduced demographic performance. we tested for the effects of human disturbance on olympic marmots (marmota olympus), a large ground-dwelling squirrel that has disappeared from several areas where recreation levels are high. we assessed the degree to which antipredator and foraging behavior and demographic ... | 2007 | 17650256 |