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http://dx.doi.org/10.13047/KJEE.2019.33.2.168

Feeding Behavior of Black-faced Spoonbills Platalea minor on Rice Paddy in Gangwha Island, Korea  

Yoo, Sung-Yeon (Department of Biology, Kyung Hee University)
Kwon, In-Ki (Research Center for Endangered Species, National Institute of Ecology)
Yoo, Jeong-Chil (Department of Biology, Kyung Hee University)
Publication Information
Korean Journal of Environment and Ecology / v.33, no.2, 2019 , pp. 168-177 More about this Journal
Abstract
This study was conducted to examine the impact of various environmental factors on the feeding behavior of black-faced spoonbills Platalea minor known to use rice fields during the breeding season. We surveyed the rice fields three times a month from April to June 2017 and from April to June 2018. We counted the number of black-faced spoonbills and measured the environmental factors such as the water depth, paddy type by cultivation stage, and biomass of potential prey that are expected to affect black-faced spoonbills. We also filmed the feeding behavior of black-faced spoonbills to examine differences in feeding behavior by environmental factors. The survey showed that the number of black-faced spoonbills reached its peak from late April to late May which was the breeding period. Among a total of 308 black-faced spoonbills observed, 86.4% (n=266) were observed feeding on rice paddies, 90.6% (n=279) were adults, and none was observed on dry paddies. The biomass of rice paddy increased significantly since May when fish started hatching, and there was a significant difference in the amount of biomass between the rice paddies where black-faced spoonbills were observed and other rice paddies. The analysis of the feeding behavior of black-faced spoonbills showed that the feeding efficiency and feeding success rate of black-faced spoonbills increased significantly when the amount of biomass soared and that the number of steps of black-faced spoonbills per minute increased greatly after rice planting was completed. The number of bill sweeping was not related to the feeding efficiency, feeding success rate, and paddy type by cultivation stage.
Keywords
SPOONBILL; ENDANGERED SPECIES; FEEDING SITE; FEEDING BEHAVIOR; FORAGING AREA;
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Times Cited By KSCI : 4  (Citation Analysis)
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