This study documents whether the rate of vocalisations that are a signal of disturbance in Little Penguins is dependent on exposure to human handling, gender and weight.
The mean number of vocalisations produced per male penguin per minute was 5.
The researchers were interested in finding out whether the brain responded differently when emotions were expressed through vocalisations
(sounds such as growls, laughter or sobbing, where no words are used) or through language.
The babies also showed more "conversational turns" -- when their vocalisations
came within seconds of the parent speaking.
Audible television and decreased adult words, infant vocalisations
, and conversational turns: a population-based study.
Vocal tics are sudden, involuntary, recurrent, often relatively loud vocalisations
These data together clearly demonstrate a dissociation of the timing of women experiencing orgasm and making copulatory vocalisations
and indicate that there is at least an element of these responses that are under conscious control, providing women with an opportunity to manipulate male behaviour to their advantage," the Daily Mail quoted the researchers as writing.
Leaf warblers and many other warblers are renowned for being very similar-looking, while having distinct vocalisations
, so it is very likely that other new species of warblers will be discovered," said Professor Alstrom.
He added: "Recent work on humans has shown that that female vocalisations
varies significantly around their fertile period.