منابع مشابه
Microbes in tree swallow semen.
A frequently hypothesized but poorly studied cost of multiple mating in birds is that exposure to pathogenic sexually transmitted microbes (STM's) can lower reproductive success. Conversely, female birds may benefit from high frequencies of copulation and multiple copulation partners if they receive cloacal inoculations of beneficial STM's that can either protect them against future encounters ...
متن کاملTree swallow reproductive investment, stress, and parasites
We reduced or increased tree swallow, Tachycineta bicolor (Vieillot, 1808), clutch sizes by three eggs (50% of modal clutch size) to test experimentally for relationships between stress and parasite loads. In the first year of the study (1996), we enumerated two measures of stress (granulocyte to non-granulocyte ratios and heterophil to lymphocyte ratios), blood parasites, and ectoparasites liv...
متن کاملStatistical Inference on Tree Swallow Migrations, Using Random Forests
Species migratory patterns have typically been studied through individual observations and historical records. In this work, we adopt a data-driven approach to modelling the presence of the North American Tree Swallow (Tachycineta bicolor) throughout the eastern United States, using data collected through the eBird project at Cornell Universitys Lab of Ornithology. Preliminary models suggest a ...
متن کاملImmunosenescence in some but not all immune components in a free-living vertebrate, the tree swallow.
A wide diversity of free-living organisms show increases in mortality rates and/or decreases in reproductive success with advancing age. However, the physiological mechanisms underlying these demographic patterns of senescence are poorly understood. Immunosenescence, the age-related deterioration of immune function, is well documented in humans and laboratory models, and often leads to increase...
متن کاملLice, Humans, and Microbes
Lice are small, wingless, minor ectoparasites of mammals and birds. More than 540 blood-sucking lice (Phthiraptera: Anoplura) have been described with each host having its own type of louse, suggesting the cospeciation of the lice species with their host. Among these, two lice species from two different genera infest humans: Pediculus humanus and Phthirus pubis (pubic “crab” l...
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ژورنال
عنوان ژورنال: Journal of Wildlife Diseases
سال: 2000
ISSN: 0090-3558
DOI: 10.7589/0090-3558-36.3.460