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12 results on '"Voigt, Christian"'

6. Habitat use of bats in relation to wind turbines revealed by GPS tracking

Author

Roeleke, Manuel, Blohm, Torsten, Kramer-Schadt, Stephanie, Yovel, Yossi, and Voigt, Christian

Subjects
Animal behaviour, Behavioural ecology, Conservation biology, Behavior, Animal, Chiroptera, Flight, Animal, Animals, Renewable Energy, Article, Ecosystem, Power Plants
Abstract

Worldwide, many countries aim at countering global climate change by promoting renewable energy. Yet, recent studies highlight that so-called green energy, such as wind energy, may come at environmental costs, for example when wind turbines kill birds and bats. Using miniaturized GPS loggers, we studied how an open-space foraging bat with high collision risk with wind turbines, the common noctule Nyctalus noctula (Schreber, 1774), interacts with wind turbines. We compared actual flight trajectories to correlated random walks to identify habitat variables explaining the movements of bats. Both sexes preferred wetlands but used conventionally managed cropland less than expected based on availability. During midsummer, females traversed the land on relatively long flight paths and repeatedly came close to wind turbines. Their flight heights above ground suggested a high risk of colliding with wind turbines. In contrast, males recorded in early summer commuted straight between roosts and foraging areas and overall flew lower than the operating range of most turbine blades, suggesting a lower collision risk. Flight heights of bats suggest that during summer the risk of collision with wind turbines was high for most studied bats at the majority of currently installed wind turbines. For siting of wind parks, preferred bat habitats and commuting routes should be identified and avoided.

Published
2016
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12. Plasma proteomic analysis of active and torpid greater mouse-eared bats (Myotis myotis).

Author

Voigt, Christian C., Greenwood, Alex D., Hecht, Alexander M., Braun, Beate C., Czirják, Gábor Á., and Krause, Eberhard

Subjects
*PROTEOMICS, *MYOTIS myotis, *MAMMAL hibernation, *PROTEIN expression, *GEL electrophoresis
Abstract

Hibernation is a physiological adaptation to overcome extreme environmental conditions. It is characterized by prolonged periods of torpor interrupted by temporary arousals during winter. During torpor, body functions are suppressed and restored rapidly to almost pre-hibernation levels during arousal. Although molecular studies have been performed on hibernating rodents and bears, it is unclear how generalizable the results are among hibernating species with different physiology such as bats. As targeted blood proteomic analysis are lacking in small hibernators, we investigated the general plasma proteomic profile of European Myotis myotis and hibernation associated changes between torpid and active individuals by two-dimensional gel electrophoresis. Results revealed an alternation of proteins involved in transport, fuel switching, innate immunity and blood coagulation between the two physiological states. The results suggest that metabolic changes during hibernation are associated with plasma proteomic changes. Further characterization of the proteomic plasma profile identified transport proteins, coagulation proteins and complement factors and detected a high abundance of alpha-fetoprotein. We were able to establish for the first time a basic myotid bat plasma proteomic profile and further demonstrated a modulated protein expression during torpor in Myotis myotis, indicating both novel physiological pathways in bats in general, and during hibernation in particular. [ABSTRACT FROM AUTHOR]

Published
2015
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