Temporal changes of populations and trophic relationships of wintering diving ducks in Chesapeake Bay. Perry, M., C., Wells-Berlin, A., M., Kidwell, D., M., & Osenton, P., C. Waterbirds, 30(4-16):80-85, 2007. ![Temporal changes of populations and trophic relationships of wintering diving ducks in Chesapeake Bay [link]](https://bibbase.org/img/filetypes/link.svg "link")
Website abstract bibtex JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. Abstract.-From 26 March to 2 August 2003, both the time budget and the diurnal rhythm of behavior of breed-ing Black-necked Cranes (Grus nigricollis) were studied at Ruoergai Wetlands National Natural Reserve, Sichuan Province, China. The breeding season was divided into three phases: Pre-reproduction, Incubation and Chick-rear-ing periods. Foraging behavior was the most prevalent during the breeding season, accounting for 45% of the di-urnal time budget, followed by breeding activity (28%), locomotion (10%), maintenance (9%), alert (7%), resting (1%) and "other behavior" including excretion, calling and antagonism (0.6%). During the three breeding phases, there were significant differences in the time budget of all behavior types except for locomotion and "other
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abstract = {JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. Abstract.-From 26 March to 2 August 2003, both the time budget and the diurnal rhythm of behavior of breed-ing Black-necked Cranes (Grus nigricollis) were studied at Ruoergai Wetlands National Natural Reserve, Sichuan Province, China. The breeding season was divided into three phases: Pre-reproduction, Incubation and Chick-rear-ing periods. Foraging behavior was the most prevalent during the breeding season, accounting for 45% of the di-urnal time budget, followed by breeding activity (28%), locomotion (10%), maintenance (9%), alert (7%), resting (1%) and "other behavior" including excretion, calling and antagonism (0.6%). During the three breeding phases, there were significant differences in the time budget of all behavior types except for locomotion and "other},
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