Journal
JOURNAL OF ZOOLOGY
Volume 311, Issue 2, Pages 99-105Publisher
WILEY
DOI: 10.1111/jzo.12760
Keywords
cave biology; home range; amphibian; movement patterns; Proteidae; site fidelity; Proteus anguinus; capture-mark-recapture
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Funding
- Otto Kinne Foundation
- Hungarian National Research, Development and Innovation Fund [SNN-125627]
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The biology of cave-dwelling species is a fascinating area, yet it is understudied due to logistic constraints, especially in regard to aquatic organisms. The olm (Proteus anguinus) is the largest known troglobiont vertebrate, showing extreme life-history characteristics such as a possible lifespan of over 100 years and a reproductive cycle of over 12 years. However, most studies carried out on the species to date are based on laboratory studies, resulting in a severe lack of ecological data from natural populations studied in their original habitat. We applied a capture-mark-recapture approach on an Eastern Herzegovinian population for eight years to reveal its spatial strategy and general movement patterns. We found that P. anguinus is sedentary, can often be found within a few square metres over several years, and their moving distance is uncorrelated with the time elapsed between recaptures. Previous laboratory studies constrained to confined space and artificial environments have already suggested site fidelity and our results from a natural population confirm this. The low reproductive activity of the species together with the reported extreme site fidelity makes this top predator of aquatic cave communities highly vulnerable and a sensitive bio-indicator of habitat-changing human activities.
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