Body mass changes in male Daubenton's bats Myotis daubentonii (Chiroptera, Vespertilionidae) during the seasonal activity period : Mammalia mamm

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Mammalia

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Body mass changes in male Daubenton's bats Myotis daubentonii (Chiroptera, Vespertilionidae) during the seasonal activity period

Jorge A. Encarnação1 / Markus Dietz2 / Uwe Kierdorf1 / Volkmar Wolters1

11. Department of Animal Ecology, Justus-Liebig-University of Giessen Heinrich-Buff-Ring 26-32 (IFZ), D-35392 Giessen (Germany)

22. Institute of Animal Ecology and Nature Education Richard-Wagner-Str. 12, D-35321 Laubach (Germany)

Citation Information: Mammalia mamm. Volume 68, Issue 4, Pages 291–297, ISSN (Online) 1864-1547, ISSN (Print) 0025-1461, DOI: 10.1515/mamm.2004.028, July 2007

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Published Online:
2007-07-13

Body mass changes of adult and juvenile male Daubenton’s bats were studied in a summer habitat in Hesse (Germany) in the years 1998-2001. Animals from the resident population were regularly captured along the flight path from April to October, and body mass was determined using a digital balance. Body mass of adult individuals differed significantly among fortnightly periods (Kruskal-Wallis ANOVA by ranks: H = 141.75, p < 0.001). Body mass increased significantly from the second half of April (median: 7.0 g) to the first half of May (median: 7.8 g). Between the second half of May and the first half of August, median body mass fluctuated between 7.8 g and 8.3 g. From the second half of July (median: 7.9 g) to the second half of August (median: 8.4 g), and the second half of September (median: 9.3 g) body mass again significantly increased. The highest median body mass (9.6 g) was recorded in the second half of October. Median body mass of juvenile males ranged between 6.5 g in the first half of July and 8.5 g in the second half of October. Differences in body mass over the studied period were significant (H = 21.70, p < 0.01). During the months July, August, and September, body mass of adult males was significantly higher than that of juveniles, whereas in October the difference was no longer of statistical significance. It is suggested that the decrease in body mass observed in some adult males in September was related to their reproductive activity.

Key Words: Myotis daubentonii,; body mass,; activity period.

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[2]
Lucie Flache, Nina I. Becker, Uwe Kierdorf, Sezin Czarnecki, Rolf-Alexander Düring, and Jorge A. Encarnação
Mammalian Biology - Zeitschrift für Säugetierkunde, 2015, Volume 80, Number 3, Page 178
[3]
Marco Rughetti and Roberto Toffoli
Acta Chiropterologica, 2014, Volume 16, Number 1, Page 149
[4]
Nina I. Becker, Marco Tschapka, Elisabeth K. V. Kalko, and Jorge A. Encarnação
Physiological and Biochemical Zoology, 2013, Volume 86, Number 3, Page 361
[5]
M. Dietz and E.K.V. Kalko
Canadian Journal of Zoology, 2007, Volume 85, Number 5, Page 653
[6]
Jorge A. Encarnação, Uwe Kierdorf, Klemens Ekschmitt, and Volkmar Wolters
Journal of Mammalogy, 2006, Volume 87, Number 1, Page 93
[8]
Mateusz Ciechanowski, Tomasz Zając, Agnieszka Zielińska, and Robert Dunajski
Acta Theriologica, 2010, Volume 55, Number 4, Page 301
[9]
Jorge A. Encarnação and Markus Dietz
European Journal of Wildlife Research, 2006, Volume 52, Number 4, Page 221
[10]
Stéphane Aulagnier and François Leboulenger
Mammalia, 2004, Volume 68, Number 4

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