The use of exposed diurnal roosts in Alberta by the little brown bat, Myotis lucifugus
The use of exposed diurnal roosts by the little brown bat,Myotis lucifugus, throughout the summer months is only known to occur among Alberta populations of this species. This study is the first to examine that behaviour. In total, 426 M. lucifugus using exposed anthropogenic surfaces as diurnal roo...
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| Published in | Canadian journal of zoology Vol. 76; no. 4; pp. 767 - 770 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Ottawa, Canada
NRC Research Press
01.04.1998
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| Online Access | Get full text |
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| Abstract | The use of exposed diurnal roosts by the little brown bat,Myotis lucifugus, throughout the summer months is only known to occur among Alberta populations of this species. This study is the first to examine that behaviour. In total, 426 M. lucifugus using exposed anthropogenic surfaces as diurnal roosts were observed in the summers of 1985 and 1986. Bats were usually found alone, but groups of up to six individuals were seen. When found at these roosts, 98.8% of bats were at least 2 m from the ground and 95.1% were below an overhang. Bats were found on brick substrates in 89.0% of observations and in the corner between two surfaces in 57.0%. Bats were found on east-facing surfaces less frequently than expected under random distribution. Roost selection appears to have been based on several strategies, including thermoregulation, predator avoidance, and desiccation avoidance. After maternity roosts were vacated, the proportion of juveniles at exposed roosts was higher than their proportion in the total population. This may be the result of their inability to enter, or lack of knowledge of, many enclosed roosts used by adults. |
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| AbstractList | The use of exposed diurnal roosts by the little brown bat,Myotis lucifugus, throughout the summer months is only known to occur among Alberta populations of this species. This study is the first to examine that behaviour. In total, 426 M. lucifugus using exposed anthropogenic surfaces as diurnal roosts were observed in the summers of 1985 and 1986. Bats were usually found alone, but groups of up to six individuals were seen. When found at these roosts, 98.8% of bats were at least 2 m from the ground and 95.1% were below an overhang. Bats were found on brick substrates in 89.0% of observations and in the corner between two surfaces in 57.0%. Bats were found on east-facing surfaces less frequently than expected under random distribution. Roost selection appears to have been based on several strategies, including thermoregulation, predator avoidance, and desiccation avoidance. After maternity roosts were vacated, the proportion of juveniles at exposed roosts was higher than their proportion in the total population. This may be the result of their inability to enter, or lack of knowledge of, many enclosed roosts used by adults. |
| Abstract_FL | Chez le Vespertilion brun, Myotis lucifugus, l'utilisation de dortoirs de jour à découvert au cours des mois d'été n'a été observée que chez les populations d'Alberta. Au total, 426 vespertilions ont été observés au repos sur des surfaces anthropogéniques au cours de la journée au cours des étés de 1985 et 1986. Les chauves-souris étaient généralement seules, mais des groupes pouvant contenir jusqu'à six individus ont été vus. Dans ces dortoirs, 98,8% des vespertilions étaient à au moins 2 mètres du sol et 95,1% se trouvaient sous une surface en surplomb. Les chauves-souris ont été trouvées sur un substrat de brique dans 89,0% des cas et dans l'angle entre deux surfaces dans 57,0% des cas. Il y avait moins de chauves-souris sur les surfaces orientées vers l'est que le nombre auquel on s'attendrait dans le cas d'une répartition aléatoire. Le choix d'un site de repos semble relever de plusieurs stratégies reliées à la thermorégulation, à la fuite des prédateurs et à l'évitement de la dessiccation. Après l'évacuation des pouponnières, la proportion des juvéniles aux dortoirs à découvert était plus élevée que leur proportion au sein de toute la population. Peut-être faut-il voir là le résultat de l'incapacité des juvéniles d'avoir accès aux dortoirs protégés utilisés par les adultes, ou peut-être est-ce le résultat de la diminution du nombre des adultes qui ont quitté les lieux pour gagner leurs hibernaculums. [Traduit par la Rédaction] |
| Author | Pybus, Margo J Riskin, Daniel K |
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| CitedBy_id | crossref_primary_10_1086_505999 crossref_primary_10_1371_journal_pone_0020483 crossref_primary_10_2193_0091_7648_2005_33_1113_IOIDAT_2_0_CO_2 crossref_primary_10_2980_17_4_3352 crossref_primary_10_1016_j_foreco_2021_119410 crossref_primary_10_1242_jeb_026161 crossref_primary_10_1098_rspb_2007_0904 crossref_primary_10_1644_1545_1542_2005_086_0729_COPSBD_2_0_CO_2 crossref_primary_10_3390_d12020076 crossref_primary_10_1898_1051_1733_103_1_30 crossref_primary_10_1242_jeb_044743 crossref_primary_10_3398_064_083_0106 crossref_primary_10_1656_058_017_0410 crossref_primary_10_2193_0022_541X_2004_068_0602_IAIVIR_2_0_CO_2 |
| Cites_doi | 10.14430/arctic1107 10.1007/BF00224357 |
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| References | Kalcounis M.C. (p_10/p_10_1) 1994; 98 Schowalter D.B. (p_13/p_13_1) 1979; 93 Boxall P.C. (p_2/p_2_1) 1982; 53 Davis W.H. (p_4/p_4_1) 1965; 46 Gerell R. (p_7/p_7_1) 1985; 2 Parker D.I. (p_11/p_11_1) 1997; 50 Adams R.A. (p_1/p_1_1) 1997; 78 Powers L.V. (p_12/p_12_1) 1991; 168 Smith H.C. (p_14/p_14_1) 1979; 37 Hochachka W.M. (p_8/p_8_1) 1986; 100 |
| References_xml | – volume: 78 start-page: 2390246 year: 1997 ident: p_1/p_1_1 publication-title: Myotis Iucifugus. J. Mammal. contributor: fullname: Adams R.A. – volume: 50 start-page: 2560265 year: 1997 ident: p_11/p_11_1 publication-title: Arctic doi: 10.14430/arctic1107 contributor: fullname: Parker D.I. – volume: 93 start-page: 2430251 year: 1979 ident: p_13/p_13_1 publication-title: Can. Field-Nat. contributor: fullname: Schowalter D.B. – volume: 168 start-page: 6750685 year: 1991 ident: p_12/p_12_1 publication-title: J. Comp. Physiol. A doi: 10.1007/BF00224357 contributor: fullname: Powers L.V. – volume: 53 start-page: 1720173 year: 1982 ident: p_2/p_2_1 publication-title: J. Field Ornithol. contributor: fullname: Boxall P.C. – volume: 37 start-page: 58062 year: 1979 ident: p_14/p_14_1 publication-title: Blue Jay contributor: fullname: Smith H.C. – volume: 46 start-page: 2960313 year: 1965 ident: p_4/p_4_1 publication-title: New England. J. Mammal. contributor: fullname: Davis W.H. – volume: 98 start-page: 2010209 year: 1994 ident: p_10/p_10_1 publication-title: Ethology contributor: fullname: Kalcounis M.C. – volume: 2 start-page: 1810185 year: 1985 ident: p_7/p_7_1 publication-title: Nyctalus contributor: fullname: Gerell R. – volume: 100 start-page: 1210122 year: 1986 ident: p_8/p_8_1 publication-title: Can. Field-Nat. contributor: fullname: Hochachka W.M. |
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| Title | The use of exposed diurnal roosts in Alberta by the little brown bat, Myotis lucifugus |
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