scholarly journals Investigating maternity roost selection by northern long-eared bats at three sites in Wisconsin

2020 ◽  
Vol 41 ◽  
pp. 55-65
Author(s):  
BA Hyzy ◽  
RE Russell ◽  
A Silvis ◽  
WM Ford ◽  
J Riddle ◽  
...  
Keyword(s):  
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

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

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.

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.

Roost selection in the pipistrelle bat,Pipistrellus pipistrellus(Chiroptera: Vespertilionidae), in northeast Scotland

1998 ◽  
Vol 56 (4) ◽  
pp. 909-917 ◽  
Author(s):  
E.V JENKINS ◽  
T LAINE ◽  
S.E MORGAN ◽  
K.R COLE ◽  
J.R SPEAKMAN
Keyword(s):  
Roost Selection ◽  
Pipistrellus Pipistrellus

Bats under a hot tin roof: comparing the microclimate of eastern cave bat (Vespadelus troughtoni) roosts in a shed and cave overhangs

2007 ◽  
Vol 55 (1) ◽  
pp. 49 ◽  
Author(s):  
B. S. Law ◽  
M. Chidel
Keyword(s):  
Energy Savings ◽  
Early Summer ◽  
Ambient Conditions ◽  
South Wales ◽  
Lactating Females ◽  
Summer Temperatures ◽  
The Cost ◽  
Maternity Roost ◽  
Diurnal Temperatures ◽  
Microclimate Conditions

We compared the microclimate experienced by maternity groups of eastern cave bats (Vespadelus troughtoni) in northern New South Wales between roosts in overhang caves versus a nearby maternity roost beneath the corrugated iron roof of a farm shed. The shed’s microclimate differed dramatically from that of the caves. Caves provided well-buffered microclimate conditions, which were cooler and more humid than ambient conditions during the day, but were warmer and less humid than ambient at night. Early summer temperatures remained between 20 and 25°C in the maternity caves. In contrast, the microclimate at the shed was not buffered, with conditions varying enormously over a 24-h period, being hotter than ambient during the day (mean = 30°C, maximum = 40°C in the middle of the day), and similar to ambient at night (mean = 18°C at dawn). Rather than selecting thermal stability, lactating females selected warm, but variable, diurnal temperatures in the shed, presumably to sustain lactation. Under this situation, we estimated considerable energetic savings by roosting in the shed (27–35%, assuming normothermia) compared with that for caves, and even higher savings if bats were torpid in the mornings and passively rewarmed later (60–69%). Lactating bats therefore presumably traded-off the cost of leaving juveniles behind in a cool roost at night with these energetic benefits. In late autumn bats continued to roost in the shed with day temperatures rising above 30°C, compared with unoccupied caves, which were considerably cooler at this time (~20°C). Clarification of the estimated energy savings and the possible costs in terms of milk production requires further research to measure concurrently body temperatures, roost temperature and energy expenditure, together with juvenile growth in different types of roosts.

Influence of temperature on maternity roost selection by noctule bats (Nyctalus noctula) and Leisler’s bats (N. leisleri) in Białowieża Primeval Forest, Poland

2006 ◽  
Vol 84 (6) ◽  
pp. 900-907 ◽  
Author(s):  
Ireneusz Ruczyński
Keyword(s):  
Late Pregnancy ◽  
Ground Level ◽  
Data Logger ◽  
Primeval Forest ◽  
Tree Cavities ◽  
Roost Selection ◽  
Pregnancy And Lactation ◽  
Maximum Temperatures ◽  
Białowieża Primeval Forest ◽  
Nyctalus Noctula

This study tests whether the temperature of tree cavities determines their selection by bats in Białowieża Primeval Forest (BPF), eastern Poland. Using a data logger, I simultaneously measured the temperature in cavities selected by bats as roosts and the temperature in available but unselected cavities. The maternity roosts chosen by noctule bats, Nyctalus noctula (Schreber, 1774), and Leisler’s bats, N. leisleri (Kuhl, 1817), during late pregnancy and lactation were warmer than unoccupied cavities, but temperature ranges in the two types of cavity did not differ. A logistic regression model showed that the mean cavity temperature during the night (2200–0400) and the minimum cavity temperature over a 24 h period were crucial for roost selection. This suggests that female noctule and Leisler’s bats selected roosts that promoted juvenile growth and used tree cavities that could save them energy while they were active because the cavity temperatures were close to the lower critical temperature of their thermoneutral zone. I also suggest that selection of warmer cavities minimized the bats' energy expenditure prior to emergence from the roost and that passive rewarming inside the cavity was an important factor in minimizing energetic costs of roosting by bats in BPF. Mean and maximum temperatures recorded near tree trunks increased with the height at which the temperature was measured (ground level, 10, 20, and 30 m), suggesting that bats can gain thermal benefits from insolation of the trunk by selecting highly placed cavities, as was observed in BPF.

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