دورية أكاديمية
Site selection and resource depletion in black-tailed godwits Limosa l. limosa eating rice during northward migration.
| العنوان: | Site selection and resource depletion in black-tailed godwits Limosa l. limosa eating rice during northward migration. |
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| المؤلفون: | Lourenço PM; Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, PO Box 14, 9750AA Haren, The Netherlands. p.m.g.lourenco@rug.nl, Mandema FS, Hooijmeijer JC, Granadeiro JP, Piersma T |
| المصدر: | The Journal of animal ecology [J Anim Ecol] 2010 May; Vol. 79 (3), pp. 522-8. Date of Electronic Publication: 2010 Jan 08. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Blackwell Country of Publication: England NLM ID: 0376574 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1365-2656 (Electronic) Linking ISSN: 00218790 NLM ISO Abbreviation: J Anim Ecol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Oxford : Blackwell Original Publication: Oxford, British Ecological Society. |
| مواضيع طبية MeSH: | Oryza*, Animal Migration/*physiology , Charadriiformes/*physiology , Energy Metabolism/*physiology , Feeding Behavior/*physiology, Animals ; Population Density ; Seasons ; Time Factors |
| مستخلص: | 1. During migratory stopovers, animals are under strong time stress and need to maximize intake rates. We examine how foragers react to resource depletion by studying the foraging ecology and foraging site selection of black-tailed godwits Limosa l. limosa staging in rice fields during their northward migration stopover (January-March 2007). 2. We analysed godwit abundance and foraging behaviour, sampled the availability of rice in the fields and used the functional response model to predict the giving-up density (GUD) of rice kernels when godwits should give up a rice field. Sightings of individually colour-marked birds were used to verify whether individuals moving between rice fields confirmed the predicted GUD. 3. Black-tailed godwit intake rates at different rice densities fitted Holling's functional response curve. The predicted GUD of rice necessary to balance allometric estimates of daily energy expenditure (DEE) and measured time budgets were confirmed by GUD measured in the field. 4. Individually marked birds moved towards rice fields with higher rather than lower rice densities more often than randomly expected. These birds increased the measured intake rates after this move. 5. Godwit foraging caused a decrease in the rice density of individual fields during the stopover period. Despite this, overall intake rates remained constant as godwits reacted to resource depletion by moving to a new foraging site as soon as their intake rate falls below the required levels to achieve DEE. |
| تواريخ الأحداث: | Date Created: 20100115 Date Completed: 20100729 Latest Revision: 20151119 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1111/j.1365-2656.2009.01654.x |
| PMID: | 20070431 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1365-2656 |
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| DOI: | 10.1111/j.1365-2656.2009.01654.x |