Migratory Bats Use Both Fat Reserves and Food to Fuel Their Strenuous Long-Distance Flights

During autumn, migratory bats use a combination of fat reserves and food to fuel their strenuous long-distance flights to the south. This is reported by researchers from the Leibniz Institute for Zoo and Wildlife Research in the "Proceedings of the Royal Society of London."

Songbirds that migrate at night, such as the blackcaps, only use their fat reserves as a fuel to power their migratory flights. This is the only source for energy since they are not capable of hunting insects during the darkness of the night when they migrate. Yet, mammals are not capable of fuelling high metabolic rates exclusively by fat oxidation -- otherwise human obesity would be unknown to modern society.
Therefore, the team led by Christian Voigt investigated which fuels migratory bats use to power their long-distance flights. In autumn, they collected breath from Nathusius' pipistrelles while these bats migrated from the Baltic region to the south. In the bat breath, the researchers measured the carbon stable isotope ratio. When animals oxidize exclusively fatty acids from their body reserves, breath is depleted in carbon-13 (13C). However, if animals oxidize exclusively ingested food, breath is enriched in carbon-13. The researchers found intermediate enrichments of carbon-13 in the breath of pipistrelles, and therefore concluded that bats used a combination of fat and ingested food as their fuel.
It appears as if bats use a mixed-fuel similar to the E10 gasoline recently introduced for cars. In the case of bats, a mixed fuel helps bats to save parts of their fat reserves for hibernation in Southern Europe, for example France. In contrast, migratory birds do not hibernate and therefore have to travel further south, some even to Africa, in order to avoid the harsh European winters. Hibernation in Northern Europe is not an option for migratory bats since they prefer tree roosts in which they would freeze to death during the cold northern winters.


BatsRule!/\^._.^/\Help Save WildLife

Articles,67,Audio,15,Backyard,10,Barbed Wire,21,Bat Art,34,Bat Books,70,Bat Box,26,Bat Clothing,14,Bat Issues,500,Bats for Children,26,Bats for the Home,61,Electrocution,7,Events,33,info on bats,455,Jackie Sparrow,22,Microbats,410,Misc,64,Netting,32,Newsletter,4,Promoting,124,Rehab,60,Rehab 2011,1,Rehab 2012,19,Rehab 2013,10,Rehab 2014,6,Rehab 2015,103,Rehab 2016,99,Rehab 2017,10,Release Cage,2,RESCUE,60,Rescue 2012,3,RESCUE 2013,11,RESCUE 2014,8,RESCUE 2015,24,Rescue 2016,12,RESCUE 2017,1,Rob Mies,11,Shooting,2,Vegetation,23,Video,421,Virus,110,WebSites-Bat,46,
Megabats and Microbats: Migratory Bats Use Both Fat Reserves and Food to Fuel Their Strenuous Long-Distance Flights
Migratory Bats Use Both Fat Reserves and Food to Fuel Their Strenuous Long-Distance Flights
Megabats and Microbats
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy