Despite this general similarity of vocal repertoire and usage of calls, our acoustic analysis showed significant differences in call structure.
This specific usage of calls suggests different meanings, with 'haa' having the potential to serve as functionally referential signals (Bugnyar et al. 2001).
A much bigger potential change than not having to turn off devices for take off and landing would be the usage of cell phones for calls inflight, and in this case I have to agree with the flight attendants union that it is a bad idea that can only lead to anger between passengers.
The Route 208 freeway, like many others in New Jersey, once had solar powered emergency call boxes every 1.0 mile; however with the advent of cell phones the usage of these call boxes became extremely limited.
I-280, like many other highways in New Jersey, once had solar powered emergency call boxes every 1 mi, however with the advent of cell phones the usage of these call boxes became extremely limited.
For instance, we did not mention the usage of base call or read mapping quality scores in our computations.
To get an overview over the usage of different call types during different phases of the breeding stage, we ran a model for each vocalisation type on the frequency of vocalisations per recording period (extrapolated to the longest recording duration) in relation to the three-factor variable nest stage (pre-nesting, early, and later nest stages), again with bird identity as random factor.
These results are in line with the usage of contact calls in birds and other anthropoid primates, which also produce close calls at a higher rate when the risk of becoming separated from group members increases (Radford and Ridley 2008; Suguira 2007; Koda et al. 2008; Ey et al. 2009).
One of the main requirements for implementation is that usage of procedure calls should be transparent from the user's point of view.
However, the usage and function of call repertoires, especially in group-living species, has been unknown, so far.
