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1 June 2004 Foraging Behaviour and Habitat use by the European Free-Tailed Bat Tadarida teniotis
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Abstract

Autumnal foraging behaviour and habitat use by Tadarida teniotis were studied in Southern Portugal, using seventeen radio-marked individuals, followed over multiple nights from fixed and mobile stations. Tadarida teniotis proved to be a late emerger, leaving the roost about one hour after sunset and, in contrast to most insectivorous bat species, only had one foraging bout. These bouts were very long, lasting an average of 6 hours and 39 minutes. Bout duration was unrelated to climatic conditions and so probably determined by foraging success. In the early evening almost all bats were foraging, but this activity declined steadily through the night. They kept flying even during fairly cold nights, but did not leave the roost on the coldest nights, in which they probably remained in torpor. As predicted by its body mass and wing morphology, T. teniotis was found to be a strong flyer, reaching speeds of over 50 km/h, and flying for up to 10 hours without resting periods. The observed speeds were 2.5 times higher than the predicted maximum range speed, which may be possible due to peculiar adaptations to high-speed flight. On most nights bats flew straight to a previously identified feeding site, but on a few they made slower indirect flights, suggesting a search for profitable foraging areas. Upon arriving to a feeding site most bats remained there for the rest of the foraging trip. The median size of these sites was just over 100 ha. Several tracked bats used the same feeding area simultaneously. The range of the colony had a radius of over 30 km, but most feeding sites were concentrated in a mountainous region located about 5 km north of the roost. The studied bats foraged preferentially over forested areas, particularly pine and cork oak woodlands. They used both alluvial plains and the valleys of a mountainous area, but not its ridges. Our observations support the hypothesis that T. teniotis is an opportunistic forager, depending on temporary concentrations of prey, such as insect swarms.

LITERATURE CITED

  1. V. Aellen 1966. Notes sur Tadarida teniotis (Raf.) (Mammalia, Chiroptera) — I. Systématique, paléontologie et peuplement, répartition géographique. Revue Suisse de Zoologie, 73: 119–159. Google Scholar

  2. H. D. J. N. Aldridge , and R. M. Brigham . 1991. Factors influencing foraging time in two aerial insectivores: the bird Chordeiles minor and the bat Eptesicus fuscus. Canadian Journal of Zoology, 69: 62–69. Google Scholar

  3. R. Arlettaz 1990. Contribution à l'éco-éthologie du Molosse de Cestoni, Tadarida teniotis (Chiroptera), dans les Alpes valaisannes (sud-ouest de la Suisse). Zeitschrift für Säugetierkunde, 55: 28–42. Google Scholar

  4. R. Arlettaz 1995. Tadarida teniotis. Pp. 198–202, in Säugetiere der Schweiz. Verbreitung, Biologie, Ökologie ( J. Hausser, ed.). Birkhäuser Verlag, Basel, 501 pp. Google Scholar

  5. R. Arlettaz , C. Ruchet, J. Aeschimann, E. Brun , M. Genoud , and P. Vogel . 2000. Physiological traits affecting the distribution and wintering strategy of the bat Tadarida teniotis. Ecology, 81: 1004–1014. Google Scholar

  6. D. Audet 1990. Foraging behavior and habitat use by a gleaning bat, Myotis myotis (Chiroptera: Vespertilionidae). Journal of Mammalogy, 71: 420–427. Google Scholar

  7. Z. Barta , and L.-C. Giraldeau . 2001. Breeding colonies as information centers: a reappraisal of information-based hypotheses using the producer-scrounger game. Behavioral Ecology, 12: 121–127. Google Scholar

  8. Y. Carmel , and U. Safriel . 1998. Habitat use by bats in a Mediterranean ecosystem in Israel — conservation implications. Biological Conservation, 84: 245–250. Google Scholar

  9. C. M. C. Catto , A. M. Hutson , P. A. Racey , and P. J. Stephenson . 1996. Foraging behaviour and habitat use of serotine bat (Eptesicus serotinus) in southern England. Journal of Zoology (London), 238: 623–633. Google Scholar

  10. H. G. Erkert 1982. Ecological aspects of bat activity rhythms. Pp. 201–242, in Ecology of bats ( T. H. Kunz, ed.). Plenum Publishing Corporation, New York, 425 pp. Google Scholar

  11. M. B. Fenton 2003. Eavesdropping on the echolocation and social calls of bats. Mammal Revue, 33: 193–204. Google Scholar

  12. A. M. Hutson 1999. Tadarida teniotis (Rafinesque, 1814). Pp. 156–157, in The atlas of European mammals ( A. J. Mitchell-Jones, G. Amori, W. Bogdanowicz, B. Kryštufek, P. J. H. Reijnders, F. Spitzenberger, M. Stubbe, J. B. M. Thissen, V. Vohralík, and J. Zima, eds.). Academic Press, London, 484 pp. Google Scholar

  13. G. Jones 1995. Flight performance, echolocation and foraging behaviour in noctule bats Nyctalus noctula. Journal of Zoology (London), 237: 303–312. Google Scholar

  14. G. Jones , and J. M. V. Rayner . 1989. Optimal flight speed in Pipistrelle bats, Pipistrellus pipistrellus. Pp. 247–253 in European Bat Research 1987 ( V. Hanák, I. Horáček, and J. Gaisler, eds.). Charles University Press, Praha, 718 pp. Google Scholar

  15. G. Jones , and J. Rydell . 1994. Foraging strategy and predation risk as factors influencing emergence time in echolocating bats. Philosophical Transactions of the Royal Society of London B, 346: 445–455. Google Scholar

  16. T. Kervyn 2001. Écologie et éthologie de la serotine commune, Eptesicus serotinus (Chiroptera, Vespertilionidae): perspectives en vue de la conservation des chiroptères. PhD Thesis, Université de Liège, Liège, 164 pp. Google Scholar

  17. C. J. Krebs 1989. Ecological methodology. Harper Collins Publications, New York, 654 pp. Google Scholar

  18. P. H. Krutzsch , T. H. Fleming , and E. G. Crichton . 2002. Reproductive biology of male Mexican free-tailed bats (Tadarida brasiliensis mexicana). Journal of Mammalogy, 83: 489–500. Google Scholar

  19. R. Å. Norberg 1981. Optimal flight speeds in birds when feeding young. Journal of Animal Ecology, 50: 473–477. Google Scholar

  20. U. M. Norberg , and J. M. V. Rayner . 1987. Ecological morphology and flight in bats (Mammalia: Chiroptera): wing adaptations, flight performance, foraging strategy and echolocation. Philosophical Transactions of the Royal Society of London B, 316: 335–427. Google Scholar

  21. R. M. Nowak 1994. Walker's bats of the world. The Johns Hopkins University Press, Baltimore, 287 pp. Google Scholar

  22. D. Russo , and G. Jones . 2003. Use of foraging habitats by bats in a Mediterranean area determined by acoustic surveys: conservation implications. Ecography, 26: 197–209. Google Scholar

  23. J. Rydell , and R. Arlettaz . 1994. Low-frequency echolocation enables the bat Tadarida teniotis to feed on tympanate insects. Proceedings of the Royal Society of London B, 257: 175–178. Google Scholar

  24. J. Rydell , A. Entwistle , and P. A. Racey . 1996. Timing of foraging flights of three species of bats in relation to insect activity and predation risk. Oikos, 76: 243–252. Google Scholar

  25. D. E. Seaman , and R. A. Powell . 1996. An evaluation of the accuracy of the Kernel density estimators for the home range analysis. Ecology, 77: 2075–2085. Google Scholar

  26. C. B. Shiel , R. E. Shiel , and J. S. Fairley . 1999. Seasonal changes in the foraging behaviour of Leisler–s bats (Nyctalus leisleri) in Ireland as revealed by radio-telemetry. Journal of Zoology (London), 249: 347–358. Google Scholar

  27. J. T. Springer 1979. Some sources of bias and sampling error in radio triangulation. Journal of Wildlife Management, 43: 926–935. Google Scholar

  28. R. K. Swihart , and N. A. Slade . 1985. Testing for independence of observations in animal movements. Ecology, 66: 1176–1184. Google Scholar

  29. L. R. Taylor , and C. I. Carter . 1961. The analysis of numbers and distribution in an aerial population of macrolepidoptera. Philosophical Transactions of the Royal Society of London, 113: 396–386. Google Scholar

  30. T. A. Vaughan , and M. M. Bateman . 1980. The molossid wing: some adaptations for rapid flight. Pp. 69–78, in Proceedings of the Fifth International Bat Research Conference ( D. E. Wilson and A. L. Gardner, eds.). Texas Tech Press, Lubbock, 434 pp. Google Scholar

  31. P. A. Waring 1989. Comparison of light-trap catches in deciduous and coniferous woodland habitats. Entomologist's Record, 101: 1–10. Google Scholar

  32. D. Waters , G. Jones , and M. Furlong . 1999. Foraging ecology of Leisler's bat (Nyctalus leis- leri) at two sites in southern Britain. Journal of Zoology (London), 249: 173–180. Google Scholar

  33. G. C. White , and R. A. Garrot . 1990. Analysis of wildlife radio-tracking data. Academic Press, London, 383 pp. Google Scholar

  34. G. S. Wilkinson 1995. Information transfer in bats. Pp. 345–360, in Ecology, evolution and behaviour of bats ( P. A. Racey and S. M. Swift, eds.). Clarendon Press, Oxford, 421 pp. Google Scholar

  35. G. S. Wilkinson , and J. W. Boughman . 1998. Social calls coordinate foraging in greater spear-nosed bats. Animal Behaviour, 55: 337–350. Google Scholar

  36. K. Zbinden , and P. Zingg . 1986. Search and hunting signals of echolocating European free-tailed bats, Tadarida teniotis, in southern Switzerland. Mammalia, 50: 9–25. Google Scholar

© Museum and Institute of Zoology PAS
J. Tiago Marques, Ana Rainho, Mafalda Carapuço, Paulo Oliveira, and Jorge M. Palmeirim "Foraging Behaviour and Habitat use by the European Free-Tailed Bat Tadarida teniotis," Acta Chiropterologica 6(1), (1 June 2004). https://doi.org/10.3161/001.006.0108
Received: 20 August 2003; Accepted: 1 January 2004; Published: 1 June 2004
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