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10 results for “roost selection”
Fig. 2 in Home range, habitat use and roost-site selection by lowland female Siamese fireback Lophura diardi in northeastern Thailand
Fig. 2. The variation in home ranges and core areas of the eight female Siamese fireback in 2011 during different reproductive periods, estimated using 95% MCP and CHP Hot Spot methods. Locations shown were the food supplement sites (1 and 2) and nesting sites during the breeding season.
Fig. 3 in Home range, habitat use and roost-site selection by lowland female Siamese fireback Lophura diardi in northeastern Thailand
Fig. 3. The occurrence probability of Siamese fireback in relation to habitat variables. Shown are predicted values and 95% confidence limits for breeding (black solid lines) and non-breeding (gray dashed lines) periods.
Fig. 1 in Home range, habitat use and roost-site selection by lowland female Siamese fireback Lophura diardi in northeastern Thailand
Fig. 1. Location of Sakaerat Environmental Research Station (SERS), northeastern Thailand, including the locations of 60 available sites, two food supplementary sites, 14 nesting sites, and 52 roosting sites. Polygons shown are the home range boundaries of the eight radiotagged Siamese firebacks (group A–H).
Data and code for: Roost selection by male northern long-eared bats (Myotis septentrionalis) in a managed fire-adapted forest
<p>Data and code for: Roost selection by male northern long-eared bats (<em>Myotis septentrionalis</em>) in a managed fire-adapted forest</p>
Roosting behavior and roost selection by Epomophorus gambianus (Pteropodidae) in a west African rural landscape
<p><span>Urbanization is driving many species to inhabit modified landscapes, but our understanding of how species respond to this remains limited. Bats are particularly vulnerable due to their life-history traits but have received little attention. We describe the roosting behavior and roost site selection, including maternity roosts, for the Gambian epauletted fruit bat (<em>Epomophorus gambianus</em>) within a modified forest-savannah transition ecological zone in Ghana, West Africa. We compared characteristics of roost and non-roost sites to test the hypotheses that roost site selection is non-random and that </span><span>maternity roost site selection differs from non-maternity roosts. Male bats were more likely to switch roost (</span><span>mean= 0.49 ± 0.23 bat days, <em>N</em>=23) than females (mean= 0.33 ± 0.18 bat days, <em>N</em>=7) while linear distances between roosts used by males (255 ± 254 m) were significantly longer than for females (102 ± 71m) (</span><em><span>t</span></em><span> = 4.50, <em>df</em> =86, <em>P</em> <0.0001). Roost trees were more likely than non-roost trees to be bigger, taller, occur closer to buildings, and be in relatively open and less mature plots; maintaining such trees in modified landscapes could benefit the species. Lactating bats selected a subset of roost trees but significantly, those that contained a greater number of bats, a strategy which may reflect predator avoidance, or other social co-operation benefits. Although there was a preference for five tree species, other trees with preferred characteristics were also used. Our findings contribute to the understanding of how species utilize modified landscapes, which is important in the management of biodiversity in the Anthropocene.</span></p>
Differential selection of roosts by Eastern Small-footed Myotis relative to rock structure and microclimate
<p>Roost selection by insectivorous bats in temperate regions is presumably influenced by roost microclimates in relation to thermoregulatory strategies, but few studies have included temperature measurements in habitat selection models. Rocky landscape features are an important source of roosts that provide both shelter from predators and beneficial microclimates for bats. Most information about rock-roosting bats is derived from western North America. We studied microhabitat selection by Eastern Small-footed Bats (<em>Myotis</em> <em>leibii</em>) on natural talus slopes and human-made stone structures in the Appalachian Mountains of Virginia and New Hampshire, relative to thermal and structural characteristics of rock crevices. Roosts were located with a combination of radio-telemetry and randomized visual surveys. Roost switching behavior and structural characteristics of roosts did not appear to be influenced by the methods we used to locate roosts. Compared to random crevices, both sexes selected crevices with narrow openings, likely to provide protection from predators. Reproductive females also selected larger rocks and more stable microclimates; whereas males selected crevices that were structurally similar to but warmed more during the day than random crevices. Rock size and other structural characteristics influenced temperatures of roosts and random crevices alike by inhibiting excessive daytime heating and nighttime cooling. Because large rocks were associated with roost selection by reproductive females, and talus slopes with large rocks could be limited, we recommend including rock size as a variable in landscape scale habitat assessments for Eastern Small-footed Bats. Protecting or managing for habitat features with large rocks that receive high solar exposure could benefit Eastern Small-footed Bats and perhaps other rock-roosting species.</p>
Seasonal roost selection of wild turkeys at their northern range edge
<p>Wild turkeys (<em>Meleagris gallopavo</em>) are diurnally active birds that spend the dark hours roosting in trees. We tested the hypothesis that multiple benefits exist for roost tree selection by wild turkeys, including thermoregulation, resource acquisition, and protection from predators. We compared 48 roost trees used by eastern wild turkeys (M. g. <em>silvestris</em>) in Ontario, Canada to 48 non-roost trees sampled contemporaneously during 2017-2019 to determine roost site selection between seasons. Mean (± SE) roost tree height (21.4 ± 0.8 m) was taller than non-roost trees (18.2 ± 0.8 m), and roost trees were also larger in diameter at breast height (58.1 ± 5.5 cm versus 38.7 ± 3.1 cm). Using ibuttons to collect microclimate temperatures at the tree, we found that mean temperature (± SE) of a deciduous roost (14.5 ± 0.1°C) was higher than temperature at either a coniferous roost (13.9 ± 0.1°C) or ambient temperature (13.2 ± 0.1°C) during the summer months. In winter however, we did not find any relationship between temperature and tree type. Roosts were closer to buildings (150.8 ± 26.0 m) in the winter compared to summer and year-round roosts, and winter roosts were also farther away from crops (395.2 ± 63.7 m) compared to roost sites used year-round. Summer roosts were closer to roads (143 ± 36.3 m) than the roosts in the winter and roosts used year-round. Our data suggest that thermoregulation is not the driving force behind roost selection; instead, predator avoidance appears to play the most important role, with some weaker evidence in support of proximity to resources.</p>
Roosting behavior and roost selection by Epomophorus gambianus (Pteropodidae) in a west African rural landscape
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Differential selection of roosts by Eastern Small-footed Myotis relative to rock structure and microclimate
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Seasonal roost selection of wild turkeys at their northern range edge
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