Does nesting habitat predict hatch synchrony between brood parasitic brown-headed cowbirds Molothrus ater and two host species?
نویسندگان
چکیده
C. M. Tonra ([email protected]) and M. D. Johnson, Dept of Wildlife, Humboldt State Univ., 1 Harpst St. Arcata, CA 95521, USA. (Present address of C. M. T.: School of Biology and Ecology, 5751 Murray Hall, Univ. of Maine, Orono, ME 04469, USA.) S. K. Heath, PRBO Conservation Science, 3820 Cypress Dr., #11, Petaluma, CA 94954, USA. M. E. Hauber, School of Biological Sciences, Univ. of Auckland, 3A Symonds Street, Aukland, PB 92019, New Zealand and Dept of Psychology, Hunter College, CUNY, 695 Park Ave., New York, NY 10065, USA.
منابع مشابه
Conventional oil and natural gas infrastructure increases brown-headed cowbird (Molothrus ater) relative abundance and parasitism in mixed-grass prairie
The rapid expansion of oil and natural gas development across the Northern Great Plains has contributed to habitat fragmentation, which may facilitate brood parasitism of ground-nesting grassland songbird nests by brown-headed cowbirds (Molothrus ater), an obligate brood parasite, through the introduction of perches and anthropogenic edges. We tested this hypothesis by measuring brown-headed co...
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Identifying the natal origins of brood parasites is a major challenge that usually requires labor-intensive searching for nests of host species. Stable isotope analysis of feathers and other body tissues of parasitic young could be a possible tool for determining natal origins if tissues reflect the isotopic composition of the diet fed to nestlings. We measured the carbon (C) and nitrogen (N) i...
متن کاملSex and seasonal differences in hippocampal volume and neurogenesis in brood-parasitic brown-headed cowbirds (Molothrus ater).
Brown-headed cowbirds (Molothrus ater) are one of few species in which females show more complex space use than males. Female cowbirds search for, revisit, and parasitize host nests and, in a previous study, outperformed males on an open field spatial search task. Previous research reported a female-biased sex difference in the volume of the hippocampus, a region of the brain involved in spatia...
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Brood parasites provide a particularly good opportunity for the study of host-parasite evolution because they directly affect the reproductive success of their hosts. Two parasitic species, the common cuckoo (Cuculus canorus) and the brown-headed cowbird (Molothrus ater), differ widely in their relationships with their hosts, yet share the attribute of having been particularly well studied by b...
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The parasitic nature of the Brown-headed Cowbird (Molothrus ater) is believed to have developed as a result of its association with the bison (Bison bison). Cowbirds subsisted on insects flushed by herds of bison, however, the nomadic nature of the bison made it impossible for cowbirds to remain with the herd and simultaneously perform nesting activities. Theoretically the evolution of parasiti...
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