Urban Maternity-Roost Selection by Big Brown Bats in Colorado

2007 ◽  
Vol 71 (3) ◽  
pp. 728-736 ◽  
Author(s):  
DANIEL J. NEUBAUM ◽  
KENNETH R. WILSON ◽  
THOMAS J. O'SHEA
Keyword(s):  
Big Brown Bats ◽  
Roost Selection ◽  
Maternity Roost

scholarly journals Maternity Roost Selection by Fringed Myotis in Colorado

2015 ◽  
Vol 75 (4) ◽  
pp. 460-473 ◽  
Author(s):  
Mark A. Hayes ◽  
Rick A. Adams
Keyword(s):  
Roost Selection ◽  
Maternity Roost

scholarly journals ROOST SELECTION BY FOREST-LIVING FEMALE BIG BROWN BATS (EPTESICUS FUSCUS)

2006 ◽  
Vol 87 (2) ◽  
pp. 345-350 ◽  
Author(s):  
Craig K. R. Willis ◽  
Christine M. Voss ◽  
R. Mark Brigham
Keyword(s):  
Eptesicus Fuscus ◽  
Big Brown Bats ◽  
Roost Selection

Population structure of Daubenton’s bats is responding to microclimate of anthropogenic roosts

Biologia ◽  
2011 ◽  
Vol 66 (4) ◽  
Author(s):  
Radek Lučan ◽  
Vladimír Hanák
Keyword(s):  
Population Structure ◽  
Reproductive State ◽  
Reproductive Condition ◽  
Male And Female ◽  
Tree Cavities ◽  
Roost Selection ◽  
Pregnancy And Lactation ◽  
Microclimatic Conditions ◽  
Maternity Roost ◽  
Growth And Reproduction

AbstractRoost microclimate plays an important role in the survival, growth and reproduction in microbats. Entering torpor is one of the main energy saving mechanisms commonly used by microbats. The use of torpor is affected by roost microclimate and seasonally differs between the two sexes in relation to their reproductive condition. Consequently, thermal properties of male and female roosts should differ. To test this hypothesis, we compared temperature parameters of two anthropogenic day roosts of Daubenton’s bats with a different structure of the population inhabiting them. In accordance with our predictions, the roost occupied by a male-dominated colony was colder and more fluctuant than the maternity roost with a female-dominated population. However, using of the two roosts changed during the season in response to changing energetic demands of the two sexes. While males were almost absent in the warmer maternity roost during pregnancy and lactation, they appeared in this roost during the post-lactation when mating starts. In contrast, females did not use the colder (male) roost until the time of weaning of juveniles, i.e., the time when their thermoregulatory needs change and they may benefit from using colder roost. Our study provides the evidence that the same roost may be used by individuals of different sex and reproductive state in different periods of the year. Generalizations about roost selection without knowledge of temporal variation in roost use and microclimatic conditions should be taken with caution. Anthropogenic roosts may be advantageous to Daubenton’s bats as these can provide a variety of suitable microclimates and/or more space for roosting than tree cavities.

scholarly journals Home is where you hang your bat: winter roost selection by prairie-living big brown bats

2017 ◽  
Vol 98 (3) ◽  
pp. 752-760 ◽  
Author(s):  
B. J. Klüg-Baerwald ◽  
C. L. Lausen ◽  
C. K. R. Willis ◽  
R. M. Brigham
Keyword(s):  
Big Brown Bats ◽  
Roost Selection

Roosting behaviour and roost selection of female big brown bats (Eptesicus fuscus) roosting in rock crevices in southeastern Alberta

2002 ◽  
Vol 80 (6) ◽  
pp. 1069-1076 ◽  
Author(s):  
Cori L Lausen ◽  
Robert M.R Barclay
Keyword(s):  
Small Groups ◽  
Eptesicus Fuscus ◽  
River Valley ◽  
Big Brown Bats ◽  
Roost Selection ◽  
Adult Females ◽  
South Saskatchewan River ◽  
Pregnancy And Lactation ◽  
Physical Attributes ◽  
Selection Of

We studied big brown bats (Eptesicus fuscus) roosting in rock crevices along the South Saskatchewan River in southeastern Alberta. We documented roosting behaviour and roost selection. During pregnancy and lactation, individuals aggregated as several small groups or one large group (maternity colony). Postlactating females roosted alone more frequently. During postlactation, individuals periodically returned to roost with a group dominated by pups, between periods of roosting alone. We identified 72 roosts used by members of the colony. Adult females switched roosts frequently and few roosts (24%) were reused. During pregnancy and lactation, the colony roosted in a 1.25-km length of the river valley on the northwest side of the river. With the onset of postlactation, females began roosting on both sides of the river and within a longer section of the river valley, and roosts faced in a more southerly direction. Crevices selected as roosts were more vertical in orientation, were farther from level ground above, and had openings that were smaller than those randomly available. Roosts used during pregnancy, lactation, and postlactation differed in physical attributes; lactation roosts were deeper and had larger openings. Selection of crevices with particular attributes suggested that selection was based on microclimate and avoidance of predation.

Habitat selection by the rare golden-tipped bat Kerivoula papuensis.

2000 ◽  
Vol 22 (1) ◽  
pp. 23 ◽  
Author(s):  
M Schulz ◽  
TJ Eyre
Keyword(s):  
Habitat Selection ◽  
New South ◽  
Foraging Habitat ◽  
Stream Channels ◽  
Large Tree ◽  
Roost Selection ◽  
South Wales ◽  
North Eastern ◽  
Maternity Roost ◽  
Multiple Tree

Habitat selection by the golden-tipped bat Kerivoula papuensis was described using presence/absence data from 144 harp trapping sites between Cooktown in north-eastern Queensland and Bulahdelah in central-eastern New South Wales. Logistic regression was used to identify structural, topographic and other attributes of sites associated with the presence of K. papuensis. Occupied habitat was characterised by an abundance of vine drapes, the presence of the yellow-throated scrubwren Sericornis citreogularis, close spacing between stream channels, multiple tree layers, high relief and slope characteristics, westerly aspect, higher elevations, low abundance of large tree epiphytes and proximity to the nearest forest ecotone. However, aspects of habitat selection are poorly known, such as maternity roost selection and foraging habitat by the species. Further study is required to fully understand the habitat requirements of this species.

Patterns of daily torpor and day-roost selection by male and female big brown bats (Eptesicus fuscus)

1994 ◽  
Vol 72 (4) ◽  
pp. 744-749 ◽  
Author(s):  
Ian M. Hamilton ◽  
Robert M. R. Barclay
Keyword(s):  
Energy Savings ◽  
Eptesicus Fuscus ◽  
Daily Torpor ◽  
Male And Female ◽  
Ambient Temperatures ◽  
Big Brown Bats ◽  
Roost Selection ◽  
East End ◽  
Reproductive Females ◽  
Juvenile Development

Daily torpor can provide significant energy savings, but in bats may reduce rates of fetal and juvenile development and spermatogenesis. We examined the use of torpor during the day by male and female big brown bats (Eptesicus fuscus) in the field during the female gestation, lactation, and postlactation periods. While both sexes used torpor, males used it significantly more often and used deeper torpor than did reproductive females, indicating that the costs of torpor are higher for reproductive females. We suggest that by using shallow torpor, females may gain some of the benefits of torpor while minimizing the fitness costs. The different patterns of torpor may be responsible for observed differences in day-roost location amongst males, reproductive females, and nonreproductive females. Males should choose roosts with lower ambient temperatures than do females in order to increase the energy savings of torpor. Males and nonreproductive females roosted away from the maternity colonies more often than did reproductive females. Within one maternity colony, males roosted in the west end of the colony, while females roosted in the east end. These patterns of roosting may be related to how the roost warms during the day.

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