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Procházka P, Emmenegger T, Bauer S, Ciloglu A, Dimitrov D, Hansson B, Hasselquist D, Yohannes E, Zehtindjiev P, Bensch S. The association between haemosporidian infection and non-breeding moult location in great reed warblers revisited by combining feather stable isotope profiles and geolocator data. Oecologia 2024; 204:107-118. [PMID: 38141067 PMCID: PMC10830769 DOI: 10.1007/s00442-023-05491-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 11/25/2023] [Indexed: 12/24/2023]
Abstract
Stable isotope analysis provides valuable insights into the ecology of long-distance migratory birds during periods spent away from a specific study site. In a previous study, Swedish great reed warblers (Acrocephalus arundinaceus) infected with haemosporidian parasites differed in feather isotope ratios compared to non-infected birds, suggesting that infected and non-infected birds spent the non-breeding season in different locations or habitats. Here, we use a novel dataset comprising geolocator data, isotopes, and haemosporidian infection status of 92 individuals from four Eurasian populations to investigate whether parasite transmission varies with geography or habitats. We found that the probability of harbouring Plasmodium and Leucocytozoon parasites was higher in birds moulting in the eastern region of the non-breeding grounds. However, no geographic pattern occurred for Haemoproteus infections or overall infection status. In contrast to the previous study, we did not find any relationship between feather isotope ratios and overall haemosporidian infection for the entire current dataset. Plasmodium-infected birds had lower feather δ15N values indicating that they occupied more mesic habitats. Leucocytozoon-infected birds had higher feather δ34S values suggesting more coastal sites or wetlands with anoxic sulphate reduction. As the composition and prevalence of haemosporidian parasites differed between the old and the current dataset, we suggest that the differences might be a consequence of temporal dynamics of haemosporidian parasites. Our results emphasize the importance of replicating studies conducted on a single population over a restricted time period, as the patterns can become more complex for data from wider geographical areas and different time periods.
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Affiliation(s)
- Petr Procházka
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic.
| | - Tamara Emmenegger
- Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden
- Department Bird Migration, Swiss Ornithological Institute, Seerose 1, 6204, Sempach, Switzerland
| | - Silke Bauer
- Department Bird Migration, Swiss Ornithological Institute, Seerose 1, 6204, Sempach, Switzerland
| | - Arif Ciloglu
- Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden
- Department of Parasitology, Faculty of Veterinary Medicine, Erciyes University, 38280, Kayseri, Turkey
- Vectors and Vector-Borne Diseases Implementation and Research Center, Erciyes University, 38280, Kayseri, Turkey
| | - Dimitar Dimitrov
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113, Sofia, Bulgaria
| | - Bengt Hansson
- Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden
| | - Dennis Hasselquist
- Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden
| | - Elizabeth Yohannes
- Department Bird Migration, Swiss Ornithological Institute, Seerose 1, 6204, Sempach, Switzerland
| | - Pavel Zehtindjiev
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113, Sofia, Bulgaria
| | - Staffan Bensch
- Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden
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Macías-Torres P, Alerstam T, Andersson A, Bäckman J, Thorup K, Tøttrup AP, Sjöberg S. Activity patterns throughout the annual cycle in a long-distance migratory songbird, the red-backed shrike Lanius collurio. MOVEMENT ECOLOGY 2022; 10:55. [PMID: 36457000 PMCID: PMC9716747 DOI: 10.1186/s40462-022-00355-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Long-distance migratory birds undergo complex annual cycles during which they must adjust their behaviour according to the needs and conditions encountered throughout the year. Yet, variation in activity throughout the entire annual cycle has rarely been studied in wild migratory birds. METHODS We used multisensor data loggers to evaluate the patterns of activity throughout the complete annual cycle of a long-distance migratory bird, the red-backed shrike Lanius collurio. Accelerometer data was used to identify life-history stages and to estimate levels of activity during various phases of the annual cycle. In this study, we analysed the variation in daytime activity along the annual cycle and between migratory and non-migratory days. RESULTS The birds' daytime activity varied throughout the annual cycle while night-time activity was almost exclusively restricted to migratory flights. The highest daytime activity levels were observed during the breeding season, while it remained low during autumn migration and the winter period. Daytime activity differed between sexes during the breeding period, when the males showed the highest level in activity. During migratory periods, both sexes exhibited a higher daytime activity in spring compared to autumn migration, being particularly high in the final migratory leg towards the breeding ground. The birds showed a lower daytime activity on migratory days (days when a migratory flight took place during the succeeding night) than on non-migratory days during both migratory seasons. CONCLUSIONS Activity measured during daytime results from a combination of several behaviours, and a high daytime activity during spring migration and the breeding period is possibly reflecting particularly energy-demanding periods in the annual cycle of migratory birds. The use of multisensor data loggers to track annual activity provides us with a full annual perspective on variation in activity in long-distance migratory species, an essential approach for understanding possible critical life-history stages and migration ecology.
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Affiliation(s)
- Pablo Macías-Torres
- Department of Biology, Lund University, Ecology Building, Lund, Sweden.
- Center for Macroecology, Evolution and Climate, Globe Institute, University of Copenhagen, Copenhagen, Denmark.
| | - Thomas Alerstam
- Department of Biology, Lund University, Ecology Building, Lund, Sweden
| | - Arne Andersson
- Department of Biology, Lund University, Ecology Building, Lund, Sweden
| | - Johan Bäckman
- Department of Biology, Lund University, Ecology Building, Lund, Sweden
| | - Kasper Thorup
- Center for Macroecology, Evolution and Climate, Globe Institute, University of Copenhagen, Copenhagen, Denmark
| | - Anders P Tøttrup
- Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
| | - Sissel Sjöberg
- Department of Biology, Lund University, Ecology Building, Lund, Sweden
- Center for Macroecology, Evolution and Climate, Globe Institute, University of Copenhagen, Copenhagen, Denmark
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