Small scale distribution patterns of female and male Daubenton's bats (Myotis daubentonii)

• Autorzy: Dietz M. , Encarnacao J. A. , Kalko E. K. V.
• Języki publikacji: EN

Abstrakty

EN

We analysed the distribution and relative abundance of Myotis daubentonii in the lowlands and uplands around the Lahn river near the city of Giessen (Hessen, Central Germany). We assumed a positive correlation between distribution and relative abundance of the trawling M. daubentonii with the amount of water surface in our study area. We further expected an unequal distribution of male and female M. daubentonii especially during the energy demanding pregnancy and lactation period of females. Daubenton's bats were found at 75% of the 64 ponds and lakes we surveyed by standardized nightly spotlight counts. The number of Daubenton's bats correlated positively with the area of the water surface and negatively with the distance to the nursery colonies. Nursery colonies were located with radio-tracking and existed predominantly in the lowlands close to the Lahn river. Mean flight distance between nursery colonies and foraging areas was 2.3 km (mean ± 1.4 km, range: 0.6–6.3 km). Sex ratio was determined at three sites studied in detail from 1992–2003 by mist-netting along regular used flight paths (n = 1,847 caught individuals). The number of female per male M. daubentonii was unequal and differed significantly between the three sites. In the lowland we found one site clearly dominated by females (median = 4.3 females per male, percentages of females 79.3%, n = 169 individuals) and a second site with an almost balanced sex ratio (median = 1.1 females per male, percentages of females 50.3%, n = 939 individuals). At the third site in the uplands males outnumbered females (median = 0.2 females per male, percentages of females 13.5%, n = 739 individuals). The percentages of females remained largely constant from spring to mid summer and changed at the beginning of September. The study revealed that a detailed knowledge of the spatial distribution of gender specific roost sites and key foraging habitats is necessary for the establishment of meaningful monitoring and conservation measures for bats.

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2006
• Tom: 08
• Numer: 2
• Opis fizyczny: p.403-415,fig.,ref.

Twórcy

autor

Dietz M.

• Department of Experimental Ecology, University of Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany

autor

Encarnacao J. A.

autor

Kalko E. K. V.

Bibliografia

• Adams, R. A. 1997. Onset of volancy and foraging patterns of juvenile little brown bats, Myotis lucifugas. Journal of Mammalogy, 78: 239-246.
• Aldridge, H. D. J. N., and R. M. Brigham. 1988. Load carrying and maneuverability in an insectivorous bat: a test of the 5% 'rule' of radiotelemetry. Journal of Mammalogy, 69: 379-382.
• Anthony, E. L. P. 1988. Age determination in bats. Pp. 1-28, in Ecological and behavioural methods for the study of bats (T. H. Kunz, ed.). Smithsonian Institution Press, Washington D.C., 425 pp.
• Anthony, E. L. P., and T. H. Kunz. 1977. Feeding strategies of the little brown bat, Myotis lucifugus, in southern New Hampshire. Ecology, 58: 775-786.
• Audet, D. 1990. Foraging behaviour and habitat use by a gleaning bat, Myotis myotis (Chiroptera: Vespertilionidae). Journal of Mammalogy, 71: 420-427.
• Audet, D. 1992. Roost quality, foraging and young production in the mouse-eared bat Myotis myotis: A test of the ESS model of group size selection. Ph.D. Thesis, York University Ontario, Canada, 127 pp.
• Balcombe, J. P., and M. B. Fenton. 1988. Eavesdropping by bats: The influence of echolocation call design and foraging strategy. Ethology, 79: 158-166.
• Barclay, R. M. R. 1984. Observations on the migration, ecology and behaviour of bats at Delta Marsh, Manitoba. Canadian Field Naturalist, 98: 331-336.
• Barclay, R. M. R. 1991. Population structure of temperate zone insectivorous bats in relation to foraging behaviour and energy demand. Journal of Animal Ecology, 60: 165-178.
• Beck, A. 1995. Fecal analyses of European bat species. Myotis, 32/33: 109-119.
• Dietz, M. 2006. Influence of reproduction on thermoregulation, food intake and foraging strategies of free-ranging female and male Daubenton's bats Myotis daubentonii (Vespertilionidae). Ph.D. Thesis, University of Ulm, Ulm, 130 pp.
• Dietz, M., and B. Fitzenräuter. 1996. Zur Flugroutennutzung einer Wasserfledermauspopulation (Myotis daubentoni Kuhl, 1819) im Stadtbereich von Giessen. Säugetierkundliche Informationen, 4: 107-116.
• Dietz, M., and e. K. V. Kalko. 2006. Seasonal changes in daily torpor patterns of free-ranging female and male Daubenton's bats (Myotis daubentonii). Journal of Comparative Physiology, 176B: 223-231.
• Encarnação, J., and M. Dietz. 2006. Estimation of food intake and ingested energy in Daubenton's bats (Myotis daubentonii) during pregnancy and spermatogenesis. European Journal of Wildlife Research, 52: 221-227.
• Encarnação, J. A., M. Dietz, and U. Kierdorf. 2002. Zur Mobilität männlicher Wasserfledermäuse (Myotis daubentonii Kuhl, 1819) im Sommer. Myotis, 40: 19-31.
• Encarnação, J. A., M. Dietz, and U. Kierdorf. 2004a. Body mass changes in male Daubenton's bats (Myotis daubentonii) during the seasonal activity period. Mammalia, 68: 291-297.
• Encarnação, J. A., M. Dietz, and U. Kierdorf. 2004b. Reproductive condition and activity pattern of male Daubenton's bats (Myotis daubentonii) in the summer habitat. Mammalian Biology, 69: 163-172.
• Encarnação, J. A., U. Kierdorf, D. Holweg, U. Jasnoch, and V. Wolters. 2005. Sex-related differences in roost-site selection by Daubenton's bats (Myotis daubentonii) during the nursery period. Mammal Review, 35: 285-294.
• Encarnacäo, J. A., U. Kierdorf, and V. Wolters. 2006. Seasonal variation in nocturnal activity of male Daubenton's bats, Myotis daubentonii (Chi- roptera: 'Vespertilionidae). Folia Zoologica, 55: 237-246.
• Encarnacäo, J. A., U. Kierdorf, and V. Wolters. In press. Do mating roosts of Daubenton's bats (Myotis daubentonii) exist at summer sites? Myotis.
• Geiger, H., and B.-U. Rudolph. 2004. Wasserfledermaus Myotis daubentonii (Kuhl, 1817). Pp. 127-138, in Fledermäuse in Bayern 2004 (A. Meschede and B.-U. Rudolph, eds.). Ulmer Verlag, Stuttgart, 411 pp.
• Haarje, C. 1994. Etho-ökologische Untersuchungen der ganzjährigen Aktivität von Wasserfledermäusen (Myotis daubentonii Kuhl 1819) am Winterquartier. Mitteilungen der Naturforschenden Gesellschaft Schaffhausen, 39: 15-52.
• Jonasson, P. M., and J. Kristiansen. 1967. Primary and secondary production in Lake Esrom, growth of Chironomus anthracinus in relation to seasonal cycles of phytoplankton and dissolved oxygen. Internationale Revue der gesamten Hydrobiologie, 52: 163-217.
• Jones, G., and J. M. V. Rayner. 1988. Flight performane, foraging tactics and echolocation in free- living Daubenton's bats Myotis daubentoni (Chiroptera: Vespertilionidae). Journal of Zoology (London), 215: 113-132.
• Jones, G., P. L. Duverge, and R. D. Ransome. 1995. Conservation biology of an endangered species: field studies of greater horseshoe bats. Symposium of the Zoological Society of London, 67: 309-324.
• Kalb, M., and V. Vent-Schmidt. 1981. Das Klima von Hessen. Hessisches Landesamt für Ernährung, Landwirtschaft und Landesentwicklung, Wiesbaden, 115 pp.
• Kalko, B. K. V., and H.-U. Schnitzler. 1989. The echolocation and hunting behaviour of Daubenton's bat, Myotis daubentoni. Behaviour Ecology Sociobiology, 24: 225-238.
• Kallasch, C., and M. Lehnert. 1994. Zur Populationsökologie von Wasser- und Fransenfledermäusen (Myotis daubentonii und M. nattereri) in der Spandauer Zitadelle (Berlin). Bericht Gesellschaft der Naturfreunde, 34: 69-91.
• Kerth, G., A. Kiefer, C. Trappmann, and M. Weishaar. 2003. High gene diversity at swarming sites suggests hot spots for gene flow in the endangered Bechstein's bat. Conservation Genetics, 4: 491-499.
• Klausing, O. 1988. Die Naturräume Hessens (1:200.000). Hessische Landesanstalt für Umwelt, Wiesbaden, 56 pp.
• Kunz, T. H. 1974. Feeding ecology of a temperate insectivorous bat (Myotis velifer). Ecology, 55: 693-711.
• Kurta, A., G. P. Bell, K. A. Nagy, and T. H. Kunz. 1989. Energetics of pregnancy and lactation in free-ranging little brown bats (Myotis lucifugus). Physiological Zoology, 62: 804-818.
• Lesiński, G. 1989. Summer and autumn dynamics of Myotis daubentonii in underground shelters in central Poland. Pp. 519-521, in European bat research 1987 (V. Hanák, I. Horáček, and J. Gaisler, eds.). Charles University Press, Praha, 718 pp.
• Leuzinger, Y., and C. Brossard. 1994. Répartition de M. daubentonii en fonction du sexe et de la période de l'année dans le Jura bernois. Résultats préliminaires. Mitteilungen der Naturforschenden Gesellschaft Schaffhausen, 39: 135-143.
• Mitchell-Jones, A. J., and A. P. Mc Leish. 1999. The bat workers' manual, 2nd edition. Joint Nature Conservation Committee, Peterborough, 138 pp.
• Moeschler, P., and M. Ruedi. 1995. Myotis daubentonii (Leisler in Kühl, 1819). Pp. 92-96, in Säugetiere der Schweiz (Denkschriftkommission der Schweizerischen Akademie der Naturwissenschaften, ed.). Birkhäuser Verlag, Basel, 501 pp.
• Parsons, K. N„ G. Jones, I. F. Davidson-Watts, and F. Greenaway. 2003. Swarming of bats at underground sites in Britian — implications for conservation. Biological Conservation, 111: 63-70.
• Racey, P. A. 1988. Reproductive assessment in bats. Pp. 31-45, in Ecological and behavioral methods for the study of bats (T. H. Kunz, ed.). Smithsonian Institution Press, Washington D.C., 533 pp.
• Racey, P. A., and J. R. Speakman. 1987. The energy costs of pregnancy and lactation in heterothermic bats. Symposium of the Zoological Society London, 57: 107-125.
• Racey, P., and A. C. Entwistle. 2003. Conservation ecology of bats. Pp. 680-743, in Bat ecology (T. H. Kunz and M. B. Fenton, eds.). The University of Chicago Press, Chicago, 779 pp.
• Russo, D. 2002. Elevation affects the distribution of the two sexes in Daubenton's bats Myotis daubentonii (Chiroptera: Vespertilionidae) from Italy. Mammalia, 66: 543-551.
• Rydell, J. 1986. Feeding territoriality in female northern bats, Eptesicus nilssoni. Ethology, 72: 329-337.
• Senior, P., R. Butlin, and J. D. Altringham. 2005. Sex and segregation in temperate bats. Proceedings of the Royal Society, 272B: 2467-2473.
• Siemers, B., P. Stilz, and H.-U. Schnitzler. 2001. The acoustic advantage of hunting at low heights above water: behavioural experiments on the European 'trawling bats' Myotis capaccini, M. dasycneme and M. daubentonii. Journal of Experimental Biology, 204: 3843-3854.
• Speakman, J. R„ P. A. Racey, C. M. C. Catto, P. I. Webb, S. M. Swift, and M. Burnett. 1991. Minimum summer populations and densities of bats in N.E. Scotland, near the northern borders of their distributions. Journal of Zoology (London), 225: 327-345.
• Swift, S. M„ and P. A. Racey. 1983. Ressource partitioning in two species of vespertilionid bats (Chiroptera: Vespertilionidae) occupying the same roost. Journal of Zoology (London), 200: 249-259.
• Wallin, L. 1961. Territorialism on the hunting ground of Myotis daubentonii. Säugetierkundliche Mitteilungen, 9: 156-159.
• Warren, R. D., D. A. Waters, J. D. Altringham, and D. J. Bullock. 2000. The distribution of Daubenton's bats (Myotis daubentonii) and pipistrelle bats (Pipistrellus pipistrellus) (Vespertilionidae) in relation to small-scale variation in riverine habitat. Biological Conservation, 92: 85-91.
• White, G C., and R. A. Garrott. 1990. Analysis of wildlife radio-tracking data. Academic Press, San Diego, 474 pp.
• Wilde, C. J., M. A. Kerr, C. H. Knight, and P. A. Racey. 1995. Lactation in vespertilionid bats. Symposia of the Zoological Society of London, 67: 139-149.
• Wilde, C. J., C. H. Knight, and P. A. Racey. 1999. Influence of torpor on milk protein composition and secretion in lactating bats. Journal of Experimental Zoology, 284: 35-41.
• Zahn, A., and B. Dippel. 1997. Male roosting habitats, mating systems and mating behaviour of Myotis myotis. Journal of Zoology (London), 243: 659-674.

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