Seasonal population dynamics and movement patterns of a critically endangered, cave-dwelling bat, Miniopterus orianae bassanii
Rattachement africain : au. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Context Seasonal migration and movements of bats have important implications for their conservation. The southern bent-winged bat (Miniopterus orianae bassanii), a critically endangered cave-dwelling taxon in Australia, has been described as undertaking regional-scale migration between maternity and non-breeding caves. Aims To describe the seasonal cycle of movements by the southern bent-winged bat, including migration and congregation events of different sex- and age-classes in the population. Methods We tagged a total of 2966 southern bent-winged bats with passive integrated transponder (PIT) tags. Antennas were used to detect bats in flight at a major maternity cave and a key non-breeding cave in south-east South Australia, from January 2016 to August 2019. We used capture–resight histories to visualise population patterns and model the daily encounter probability for each sex- and age-class at the respective roost sites. Key results Bats congregated at the maternity cave for most of the year, with different seasonal patterns among sex- and age-classes. Seasonal movements were associated with behaviour over winter months: most of the population dispersed from the maternity cave from May and a staged return occurred among population classes from July through September. A previously undescribed movement occurred in adult females and juveniles each year: these classes left the maternity cave in late summer, when juveniles became independent, and returned in early mid-autumn, later undertaking winter dispersal. Complex underlying movements of individuals occurred throughout the year, with individuals able to fly 72 km between roosting caves in just a few hours. Conclusions Seasonal movements are a key aspect of the life history of this taxon. The newly reported movement of adult females and juveniles conforms to the maternal guidance hypothesis, whereby mothers guide their young to suitable non-breeding caves and hibernation sites. In addition to seasonal movements, some individuals moved 72 km between caves multiple times over short time periods, including on successive nights. This 72-km overnight flight distance more than doubles the previous distance used to inform management buffer zones. Extended congregation of bats at the maternity cave highlights resource limitation in the surrounding area as a potential threat to this population. Implications The dynamic nature of the population has implications for the management of emerging risks, including mortality at windfarms and potential rapid spread of the exotic white-nose syndrome.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Seasonal population dynamics and movement patterns of a critically endangered, cave-dwelling bat, Miniopterus orianae bassanii
- Date Crossref
- 02/05/2022
- Éditeur
- CSIRO Publishing
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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La Trobe University Research Centre for Future Landscapes pays non établi dans la noticeUniversité ou école supérieure
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Zoos Victoria pays non établi dans la noticeInstitution
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The University of Melbourne CDepartment of Geography pays non établi dans la noticeUniversité ou école supérieure
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Arthur Rylah Institute for Environmental Research pays non établi dans la noticeOrganisme public
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Department of Environment pays non établi dans la noticeOrganisme public
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South Australian Museum pays non établi dans la noticeInstitution
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The University of Adelaide pays non établi dans la noticeUniversité ou école supérieure
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BWildlife Conservation and Science pays non établi dans la noticeInstitution
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SA 5001 Adelaide pays non établi dans la noticeEntreprise
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FSchool of Biological Sciences pays non établi dans la noticeUniversité ou école supérieure
Research Centre for Future Landscapes — La Trobe University, Zoos Victoria et CDepartment of Geography — The University of Melbourne, avec 7 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.