Wading bird foraging on a wetland landscape: a comparison of two strategies
Tactile-feeding wading birds, such as wood storks and white ibises, require high densities of prey such as small fishes and crayfish to support themselves and their offspring during the breeding season. Prey availability in wetlands is often determined by seasonal hydrologic pulsing, such as in the...
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| Format: | Article |
| Language: | English |
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AIMS Press
2022-05-01
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| Series: | Mathematical Biosciences and Engineering |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/mbe.2022361?viewType=HTML |
| _version_ | 1828533339144847360 |
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| author | Hyo Won Lee Donald L. DeAngelis Simeon Yurek Stephen Tennenbaum |
| author_facet | Hyo Won Lee Donald L. DeAngelis Simeon Yurek Stephen Tennenbaum |
| author_sort | Hyo Won Lee |
| collection | DOAJ |
| description | Tactile-feeding wading birds, such as wood storks and white ibises, require high densities of prey such as small fishes and crayfish to support themselves and their offspring during the breeding season. Prey availability in wetlands is often determined by seasonal hydrologic pulsing, such as in the subtropical Everglades, where spatial distributions of prey can vary through time, becoming heterogeneously clumped in patches, such as ponds or sloughs, as the wetland dries out. In this mathematical modeling study, we selected two possible foraging strategies to examine how they impact total energetic intake over a time scale of one day. In the first, wading birds sample prey patches without a priori knowledge of the patches' prey densities, moving from patch to patch, staying long enough to estimate the prey density, until they find one that meets a predetermined satisfactory threshold, and then staying there for a longer period. For this case, we solve for a wading bird's expected prey intake over the course of a day, given varying theoretical probability distributions of patch prey densities across the landscape. In the second strategy considered, it is assumed that the wading bird samples a given number of patches, and then uses memory to return to the highest quality patch. Our results show how total intake over a day is impacted by assumptions of the parameters governing the spatial distribution of prey among patches, which is a key source of parameter uncertainty in both natural and managed ecosystems. Perhaps surprisingly, the foraging strategy that uses a prey density threshold generally led to higher maximum potential prey intake than the strategy for using memory to return to the best patch sampled. These results will contribute to understanding the foraging of wading birds and to the management of wetlands. |
| first_indexed | 2024-12-11T23:08:07Z |
| format | Article |
| id | doaj.art-a5c8f53dc3fd4f0a902cedd7c52e7353 |
| institution | Directory Open Access Journal |
| issn | 1551-0018 |
| language | English |
| last_indexed | 2024-12-11T23:08:07Z |
| publishDate | 2022-05-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | Mathematical Biosciences and Engineering |
| spelling | doaj.art-a5c8f53dc3fd4f0a902cedd7c52e73532022-12-22T00:46:50ZengAIMS PressMathematical Biosciences and Engineering1551-00182022-05-011987687771810.3934/mbe.2022361Wading bird foraging on a wetland landscape: a comparison of two strategiesHyo Won Lee0Donald L. DeAngelis1Simeon Yurek 2Stephen Tennenbaum 31. Biological Sciences Department, Florida International University, Miami, FL, USA2. U.S. Geological Survey, Wetland and Aquatic Research Center, Davie, FL 33314, USA3. U.S. Geological Survey, Wetland and Aquatic Research Center, Gainesville, FL 32653, USA1. Biological Sciences Department, Florida International University, Miami, FL, USATactile-feeding wading birds, such as wood storks and white ibises, require high densities of prey such as small fishes and crayfish to support themselves and their offspring during the breeding season. Prey availability in wetlands is often determined by seasonal hydrologic pulsing, such as in the subtropical Everglades, where spatial distributions of prey can vary through time, becoming heterogeneously clumped in patches, such as ponds or sloughs, as the wetland dries out. In this mathematical modeling study, we selected two possible foraging strategies to examine how they impact total energetic intake over a time scale of one day. In the first, wading birds sample prey patches without a priori knowledge of the patches' prey densities, moving from patch to patch, staying long enough to estimate the prey density, until they find one that meets a predetermined satisfactory threshold, and then staying there for a longer period. For this case, we solve for a wading bird's expected prey intake over the course of a day, given varying theoretical probability distributions of patch prey densities across the landscape. In the second strategy considered, it is assumed that the wading bird samples a given number of patches, and then uses memory to return to the highest quality patch. Our results show how total intake over a day is impacted by assumptions of the parameters governing the spatial distribution of prey among patches, which is a key source of parameter uncertainty in both natural and managed ecosystems. Perhaps surprisingly, the foraging strategy that uses a prey density threshold generally led to higher maximum potential prey intake than the strategy for using memory to return to the best patch sampled. These results will contribute to understanding the foraging of wading birds and to the management of wetlands.https://www.aimspress.com/article/doi/10.3934/mbe.2022361?viewType=HTMLprey density probability distributionheterogeneous landscapethreshold for foragingforaging using memory |
| spellingShingle | Hyo Won Lee Donald L. DeAngelis Simeon Yurek Stephen Tennenbaum Wading bird foraging on a wetland landscape: a comparison of two strategies Mathematical Biosciences and Engineering prey density probability distribution heterogeneous landscape threshold for foraging foraging using memory |
| title | Wading bird foraging on a wetland landscape: a comparison of two strategies |
| title_full | Wading bird foraging on a wetland landscape: a comparison of two strategies |
| title_fullStr | Wading bird foraging on a wetland landscape: a comparison of two strategies |
| title_full_unstemmed | Wading bird foraging on a wetland landscape: a comparison of two strategies |
| title_short | Wading bird foraging on a wetland landscape: a comparison of two strategies |
| title_sort | wading bird foraging on a wetland landscape a comparison of two strategies |
| topic | prey density probability distribution heterogeneous landscape threshold for foraging foraging using memory |
| url | https://www.aimspress.com/article/doi/10.3934/mbe.2022361?viewType=HTML |
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