| ticks (acari: ixodidae) and spirochetes (spirochaetaceae: spirochaetales) recovered from birds on a georgia barrier island. | from september 1997 through july 1999, 300 individuals and 46 species of birds were mist-netted and screened for ticks and spirochetes on st. catherine's island, liberty county, ga. seventy-six (25%) of the birds were parasitized by a meal intensity of 4.6 ticks. seasonally, more birds were infested with ticks during the summer (50% in 1998, 34% in 1999) than in spring (15% in 1998, 11% in 1999) or fall (21% in 1997, 20% in 1998), mainly because of severe infestations on some birds by immature s ... | 2001 | 11296828 |
| no energetic cost of anthropogenic disturbance in a songbird. | anthropogenic or natural disturbances can have a significant impact on wild animals. therefore, understanding when, how and what type of human and natural events disturb animals is a central problem in wildlife conservation. however, it can be difficult to identify which particular environmental stressor affects an individual most. we use heart rate telemetry to quantify the energy expenditure associated with different types of human-mediated and natural disturbances in a breeding passerine, the ... | 2009 | 19129135 |
| adrenocortical responses to offspring-directed threats in two open-nesting birds. | dependent young are often easy targets for predators, so for many parent vertebrates, responding to offspring-directed threats is a fundamental part of reproduction. we tested the parental adrenocortical response of the endangered black-capped vireo (vireo atricapilla) and the common white-eyed vireo (v. griseus) to acute and chronic threats to their offspring. like many open-nesting birds, our study species experience high offspring mortality. parents responded behaviorally to a predator decoy ... | 2009 | 19371744 |
| win-stay, lose-switch and public information strategies for patch fidelity of songbirds with rare extra-pair paternity. | determining where organisms breed and understanding why they breed in particular locations are fundamental biological questions with conservation implications. breeding-site fidelity is common in migratory, territorial songbirds and is typically thought to occur following reproductive success with a social mate and success of nearby conspecifics. it is currently unknown if frequency of extra-pair paternity in a population influences use of information about reproductive success of nearby conspec ... | 2012 | 22389763 |