Begging in the absence of parents by nestling tree swallows
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چکیده
منابع مشابه
study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
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Accumulation of PCB congeners in nestling tree swallows (Tachycineta bicolor) on the Hudson River, New York.
Tree swallows (Tachycineta bicolor) were used as a sentinel species to monitor the contamination and bioavailability of polychlorinated biphenyls (PCBs) in the Hudson River watershed. Several tree swallow nest box colonies around and downstream from Hudson Falls, NY, were studied. Tree swallow eggs, adults, and 5-, 10-, and 15-day-old nestlings were collected and analyzed for 103 PCB congeners....
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This study presents data relevant to the hypothesis that the energy expenditure associated with begging influences the signalling of need by nestling birds. We used open-circuit respirometry to measure the energy costs of resting, begging and non-begging activities in nestling house wrens, Troglodytes aedon, ranging in age from 1 to 11 days post-hatching. Across all ages, begging caused a 27% i...
متن کاملOrganochlorine contamination and physiological responses in nestling tree swallows in Point Pelee National Park, Canada.
Point Pelee National Park in southwestern Ontario, Canada--a major migratory route and vital breeding area for many birds--has localized areas of organochlorine (OC) contamination from the 1950s and 1960s. During 2002, we investigated the effect of tissue OC contaminant levels on the physiology and growth of nestling tree swallows (Tachycineta bicolor). Polychlorinated biphenyl (PCB) contaminat...
متن کاملVariation in Growth of Nestling Tree Swallows across Multiple Temporal and Spatial Scales
—Differences within a species in rates of growth of nestlings can be used as indicators of the quality of parental care, environmental conditions, and future success of offspring, whereas comparisons among different species may reflect a history of different ecological conditions or life-history strategies. The presesnt study examines the patterns of variation in growth in nestling Tree Swallow...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2001
ISSN: 1465-7279
DOI: 10.1093/beheco/12.4.501