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Author (up) Murugavel, B.; Kelber, A.; Somanathan, H.
Title Light, flight and the night: effect of ambient light and moon phase on flight activity of pteropodid bats Type Journal Article
Year 2021 Publication Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology Abbreviated Journal J Comp Physiol A Neuroethol Sens Neural Behav Physiol
Volume in press Issue Pages
Keywords Animals; Moonlight; Ambient light; Flight activity; Moon phases; Pteropodids; Twilight zones
Abstract Fruit-feeding pteropodid bats roost under varying light conditions. Some roost in trees with high exposure to daylight (> 1000 lx), while others roost in dark caves (< 0.1 lx). To understand the effect of ambient light intensity and moon phase on flight activity, we examined flight times across five lunar cycles in three pteropodid species whose roosts differ in daylight exposure. We found significant interspecific differences in flight emergence and termination times. All species initiated flights after sunset but Rousettus leschenaultii, which typically roosts in caves, delayed emergence (40 +/- 11 min) more than the two tree-roosting species Pteropus giganteus (16 +/- 6 min) and Cynopterus sphinx (19 +/- 7 min). R. leschenaultii terminated flights earlier (30 +/- 7 min before sunrise) than P. giganteus (11 +/- 11 min) and C. sphinx (16 +/- 10 min). All individuals from P. giganteus and C. sphinx roosts emerged within less than an hour, while emergence times were more spread out in the R. leschenaultii colony. Peak emergence times differed across moon phases in the cave-roosting R. leschenaultii but not in the other species. Flight activity in R. leschenaultii is restricted to comparatively lower light levels than the tree-roosting species. The observed interspecific differences suggest that bat species, sharing same landscapes may respond differently to light pollution.
Address IISER TVM Centre for Research and Education in Ecology and Evolution (ICREEE), School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, India
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ISSN 0340-7594 ISBN Medium
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Notes PMID:33537858 Approved no
Call Number GFZ @ kyba @ Serial 3346
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Author (up) Pérez-Granados, C.; Schuchmann, K.-L.; Marques, M.I.
Title Vocal activity of the Ferruginous pygmy-owl (Glaucidium brasilianum) is strongly correlated with moon phase and nocturnal temperature Type Journal Article
Year 2021 Publication Ethology Ecology & Evolution Abbreviated Journal Ethology Ecology & Evolution
Volume 33 Issue 1 Pages 62-72
Keywords Animals; Moonlight
Abstract Bird vocal activity is affected by endogenous and exogenous factors. Owl surveys are mainly based on the detection of nocturnal calls, and therefore, the impact of exogenous factors on owls’ vocal activity may have consequences in conservation planning and behavioural studies. However, our current knowledge about the impact of climatic factors and the moon phase on owl calling behaviour is very limited, especially in the Neotropics. We used autonomous recording units to evaluate the effect of air temperature, rainfall, relative air humidity, and percent of the moon illuminated on the vocal occurrence (active/inactive) of the Ferruginous pygmy-owl (Glaucidium brasilianum) over three consecutive moon cycles in the Brazilian Pantanal. Vocal activity was positively associated with the percent of the moon illuminated, with 75% of the nights on which the species was vocally active having a moon illumination percentage higher than 77%. The vocal activity of the species was negatively associated with the nocturnal air temperature, with more vocal activity observed on cooler nights. Relative air humidity and daily rainfall were not associated with the vocal activity of the Ferruginous pygmy-owl. Our study improves the knowledge about the impact of exogenous factors on the calling behaviour of Neotropical owls. We conclude that future surveys aiming to detect the Ferruginous pygmy-owl should be carried out on nights with a high percent of moon illumination (>75%) and nights with low average temperature (< 18 °C).
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ISSN 0394-9370 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number UP @ altintas1 @ Serial 3279
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Author (up) Persons, W.E.; Eason, P.
Title Human activity and habitat type affect perceived predation risk in urban white-footed mice (Peromyscus leucopus) Type Journal Article
Year 2017 Publication Ethology Abbreviated Journal Ethology
Volume 123 Issue 5 Pages 348-356
Keywords Animals
Abstract Predation risk is one of the largest costs associated with foraging in small mammals. Small mammals select microhabitat features such as tree and shrub canopy cover, woody debris and vegetative ground cover that can lower the risk of detection from predators and provide greater protection if discovered. Small mammals also increase foraging activity and decrease selection for cover when cloud cover increases and moon illumination is less. Often researchers assume small mammals in urban areas respond to these cues in the same manner as in natural areas, but these cues themselves are altered in urban zones. In this study, we investigated how Amur honeysuckle (Lonicera maackii) and coarse woody debris (CWD) affected giving-up density (GUD) in white-footed mice (Peromyscus leucopus). Each of three habitat treatments (open flood channel, the edge and interior of the honeysuckle patch) contained cover treatments with coarse woody debris present or absent. The six treatment combinations were compared to environmental variables (temperature, humidity and illumination) and habitat variables to test their effect on GUD. Peromyscus leucopus foraged to lower densities in areas with CWD present and also under the honeysuckle canopy, using this invasive shrub to decrease predation risk, potentially increasing survivability within this urban park. Increased human presence negatively affected foraging behavior across treatments. Human presence and light pollution significantly influenced P. leucopus, modifying their foraging behavior and demonstrating that both fine- and coarse-scale urban factors can affect small mammals. Foraging increased as humidity increased, particularly under the honeysuckle canopy. Changes in illumination due to moonlight and cloud cover did not affect foraging behavior, suggesting urban light pollution may have altered behavioral responses to changes in light levels. Lonicera maackii seemed to facilitate foraging in P. leucopus, even though it adversely affects the plant community, suggesting that its impact may not be entirely negative.
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Series Volume Series Issue Edition
ISSN 0179-1613 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1642
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Author (up) Rubolini, D.; Maggini, I.; Ambrosini, R.; Imperio, S.; Paiva, V.H.; Gaibani, G.; Saino, N.; Cecere, J.G.; Herberstein, M.
Title The Effect of Moonlight on Scopoli's ShearwaterCalonectris diomedeaColony Attendance Patterns and Nocturnal Foraging: A Test of the Foraging Efficiency Hypothesis Type Journal Article
Year 2015 Publication Ethology Abbreviated Journal Ethology
Volume 121 Issue 3 Pages 284-299
Keywords animals
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ISSN 0179-1613 ISBN Medium
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Notes Approved no
Call Number LoNNe @ kyba @ Serial 1278
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Author (up) Underhill, V.A.; Höbel, G.
Title Mate choice behavior of female Eastern Gray Treefrogs (Hyla versicolor) is robust to anthropogenic light pollution Type Journal Article
Year 2018 Publication Ethology Abbreviated Journal Ethology
Volume 124 Issue 8 Pages 537-548
Keywords Animals
Abstract Human activities are drastically changing the amount of artificial light entering natural habitats. Because light pollution alters the sensory environment, it may interfere with behaviors ranging from prey detection and vigilance to mate choice. Here, we test the hypothesis that anthropogenic light pollution affects the mate choice behavior of female Eastern Gray Treefrogs (Hyla versicolor). We tested this hypothesis under two experimental light treatments that simulate the light pollution created by streetlights (expansion of lit areas and increased light intensity), and the light pollution created by headlights of passing vehicles (rapid fluctuations between bright and dark conditions). The hypothesis predicts that females tested under conditions simulating light pollution will show behavioral changes geared toward mitigating detection by predators, such as relaxed preferences, decreased choosiness for the normally preferred call, and differences in approach behavior (either more directional, faster, or stealthier movements, or no approach at all). Contrary to our prediction, we found that light pollution did not affect mate choice behavior in Gray Treefrogs, and should therefore neither interfere with population persistence nor affect the sexual selection regimes on male call traits of this species. However, we caution that this result does not imply that anthropogenic light pollution is of no concern for amphibian conservation, because behavioral responses to variation in nocturnal light levels (both in the natural as well as anthropogenically enhanced range) seem to be highly species‐specific in anurans. We encourage additional studies to help gage the vulnerability of anurans to anthropogenic light pollution.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0179-1613 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number NC @ ehyde3 @ Serial 2090
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