SUBSCRIBE TO MY YOUTUBE CHANNEL & HELP SUPPORT BATS

'Private Bandwidth' For Communication In Bats: Evidence From Insular Horseshoe Bats


Do bats use their ultrasonic echolocation calls to recognise their own species?

A new study in the Journal of Biogeography by Danilo Russo and colleagues suggests that this is certainly the case for horseshoe bats (Rhinolophidae). These bats find their way in the dark and detect insect prey by emitting long ultrasound calls mainly made of a constant frequency. Different rhinolophid species show different frequency values. It has been proposed that such differences are large enough to allow recognition of conspecifics.
The study proved that in Sardinia, Mediterranean (Rhinolophus euryale) and lesser (R.. hipposideros) horseshoe bats show divergence in call frequency, spacing them out more than their conspecifics living in peninsular Italy (i.e. on the mainland).
Why? The reason may be the presence of a third species, the Mehely's horseshoe bat (Rhinolophus mehelyi), practically absent on the mainland but abundant in Sardinia. This bat emits frequencies falling between the other two species: if Sardinian R..euryale and R. hipposideros broadcasted the same frequency values as in peninsular Italy, there would be significant risk of overlap and, in turn, confusion in species recognition. By calling respectively at lower and higher frequencies than on the mainland, R . euryale and R. hipposideros avoid all risk of confusion.
The authors of the study suggest this may be a special case of "character displacement". The maintenance of a 'private bandwidth' for communication may have crucial implications for social interactions and sexual behaviour.
Noticeably, in mainland regions where the three species occur together, some overlap does occur. Bats move long distances, so gene flow may operate between populations living in sympatry (i.e. occurring in the same areas) and allopatry (living in separate areas) with R. mehelyi, countering the establishment of local differences. Being sufficiently isolated (ca. 180 km distant) from the mainland coast, Sardinia proved an ideal study area to test for the occurrence of acoustical character displacement in the absence of contact with allopatric populations. Once again, islands turned out to be excellent natural laboratories to explore evolutionary patterns and processes.

COMMENTS

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

Articles,64,Audio,16,Backyard,13,Barbed Wire,23,Bat Art,39,Bat Books,74,Bat Box,26,Bat Clothing,14,Bat Issues,531,Bat Stamps,1,Bats for Children,30,Bats for the Home,66,Electrocution,8,Events,33,info on bats,497,Jackie Sparrow,22,Microbats,427,Misc,88,Netting,32,Newsletter,4,Promoting,130,Rehab,72,Rehab 2011,1,Rehab 2012,23,Rehab 2013,12,Rehab 2014,6,Rehab 2015,104,Rehab 2016,101,Rehab 2017,16,Release Cage,2,RESCUE,63,Rescue 2012,3,RESCUE 2013,11,RESCUE 2014,8,RESCUE 2015,24,Rescue 2016,12,RESCUE 2017,2,Rob Mies,11,Shooting,2,Vegetation,23,Video,255,Virus,117,WebSites-Bat,42,
ltr
item
Megabats and Microbats: 'Private Bandwidth' For Communication In Bats: Evidence From Insular Horseshoe Bats
'Private Bandwidth' For Communication In Bats: Evidence From Insular Horseshoe Bats
Megabats and Microbats
http://www.batsrule.info/2012/08/private-bandwidth-for-communication-in.html
http://www.batsrule.info/
http://www.batsrule.info/
http://www.batsrule.info/2012/08/private-bandwidth-for-communication-in.html
true
4238281482117672351
UTF-8
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