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- W3141222564 abstract "Food waste disposal represents a major global source of predictable anthropogenic food subsidies and is exploited by many organisms. However, the energetic cost-benefits of foraging on these food subsidies have remained largely unexplored. Here we investigate the year-round foraging decisions of resident white storks, Ciconia ciconia , in Iberia, and assess the energetic and time cost-benefits of foraging on both landfill waste and natural food sources. To do so, we use GPS and acceleration data from 55 individuals tagged in southern Portugal between 2016 and 2019. We find that the probability of attending landfill sites was 60% during the non-breeding season and 44% during the breeding season. Moreover, foraging on landfill waste is a time- and energy-saving strategy; although birds had to travel 20% further to exploit this resource during the breeding period, they spent overall 10% less energy than when foraging on natural prey. We show that this relationship could be mediated by a reduction in foraging time and an increase in foraging efficiency while exploiting landfill waste. Surprisingly, we do not find any evidence that landfill specialists experienced any competitive advantage during landfill exploitation over birds that visit landfills occasionally. These insights are key to predict how species that rely on landfills can be affected by waste reduction initiatives planned by the European Union, and implement the necessary management strategies. • Foraging on landfill waste is a time- and energy-saving strategy. • Birds travelled further to exploit waste while breeding, but spent less energy. • Exploiting waste reduces foraging time and an increase in foraging efficiency. • Upon landfill closure, storks will have to radically change their behaviour." @default.
- W3141222564 created "2021-04-13" @default.
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- W3141222564 date "2021-08-01" @default.
- W3141222564 modified "2023-10-17" @default.
- W3141222564 title "Flying the extra mile pays-off: Foraging on anthropogenic waste as a time and energy-saving strategy in a generalist bird" @default.
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- W3141222564 doi "https://doi.org/10.1016/j.scitotenv.2021.146843" @default.
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