Adaptive host responses to infection can resemble parasitic manipulation
Abstract Using a dynamic optimisation model for juvenile fish in stochastic food environments, we investigate optimal hormonal regulation, energy allocation and foraging behaviour of a growing host infected by a parasite that only incurs an energetic cost. We find it optimal for the infected host to...
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| Format: | Article |
| Language: | English |
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Wiley
2023-07-01
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| Series: | Ecology and Evolution |
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| Online Access: | https://doi.org/10.1002/ece3.10318 |
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| _version_ | 1849774818679848960 |
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| author | Camilla Håkonsrud Jensen Jacqueline Weidner Jarl Giske Christian Jørgensen Sigrunn Eliassen Adèle Mennerat |
| author_facet | Camilla Håkonsrud Jensen Jacqueline Weidner Jarl Giske Christian Jørgensen Sigrunn Eliassen Adèle Mennerat |
| author_sort | Camilla Håkonsrud Jensen |
| collection | DOAJ |
| description | Abstract Using a dynamic optimisation model for juvenile fish in stochastic food environments, we investigate optimal hormonal regulation, energy allocation and foraging behaviour of a growing host infected by a parasite that only incurs an energetic cost. We find it optimal for the infected host to have higher levels of orexin, growth and thyroid hormones, resulting in higher activity levels, increased foraging and faster growth. This growth strategy thus displays several of the fingerprints often associated with parasite manipulation: higher levels of metabolic hormones, faster growth, higher allocation to reserves (i.e. parasite‐induced gigantism), higher risk‐taking and eventually higher predation rate. However, there is no route for manipulation in our model, so these changes reflect adaptive host compensatory responses. Interestingly, several of these changes also increase the fitness of the parasite. Our results call for caution when interpreting observations of gigantism or risky host behaviours as parasite manipulation without further testing. |
| format | Article |
| id | doaj-art-3b90874c38ee463397e21b9dfed2abf2 |
| institution | DOAJ |
| issn | 2045-7758 |
| language | English |
| publishDate | 2023-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj-art-3b90874c38ee463397e21b9dfed2abf22025-08-20T03:01:35ZengWileyEcology and Evolution2045-77582023-07-01137n/an/a10.1002/ece3.10318Adaptive host responses to infection can resemble parasitic manipulationCamilla Håkonsrud Jensen0Jacqueline Weidner1Jarl Giske2Christian Jørgensen3Sigrunn Eliassen4Adèle Mennerat5Department of Biological Sciences University of Bergen Bergen NorwayDepartment of Biological Sciences University of Bergen Bergen NorwayDepartment of Biological Sciences University of Bergen Bergen NorwayDepartment of Biological Sciences University of Bergen Bergen NorwayDepartment of Biological Sciences University of Bergen Bergen NorwayDepartment of Biological Sciences University of Bergen Bergen NorwayAbstract Using a dynamic optimisation model for juvenile fish in stochastic food environments, we investigate optimal hormonal regulation, energy allocation and foraging behaviour of a growing host infected by a parasite that only incurs an energetic cost. We find it optimal for the infected host to have higher levels of orexin, growth and thyroid hormones, resulting in higher activity levels, increased foraging and faster growth. This growth strategy thus displays several of the fingerprints often associated with parasite manipulation: higher levels of metabolic hormones, faster growth, higher allocation to reserves (i.e. parasite‐induced gigantism), higher risk‐taking and eventually higher predation rate. However, there is no route for manipulation in our model, so these changes reflect adaptive host compensatory responses. Interestingly, several of these changes also increase the fitness of the parasite. Our results call for caution when interpreting observations of gigantism or risky host behaviours as parasite manipulation without further testing.https://doi.org/10.1002/ece3.10318gigantismhormone strategyhost compensationhost–parasite coevolutionparasite manipulation |
| spellingShingle | Camilla Håkonsrud Jensen Jacqueline Weidner Jarl Giske Christian Jørgensen Sigrunn Eliassen Adèle Mennerat Adaptive host responses to infection can resemble parasitic manipulation Ecology and Evolution gigantism hormone strategy host compensation host–parasite coevolution parasite manipulation |
| title | Adaptive host responses to infection can resemble parasitic manipulation |
| title_full | Adaptive host responses to infection can resemble parasitic manipulation |
| title_fullStr | Adaptive host responses to infection can resemble parasitic manipulation |
| title_full_unstemmed | Adaptive host responses to infection can resemble parasitic manipulation |
| title_short | Adaptive host responses to infection can resemble parasitic manipulation |
| title_sort | adaptive host responses to infection can resemble parasitic manipulation |
| topic | gigantism hormone strategy host compensation host–parasite coevolution parasite manipulation |
| url | https://doi.org/10.1002/ece3.10318 |
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