Sentence examples for signals of need from inspiring English sources

These calls are also often used as hunger-related signals of need in young birds.

Here, we investigate how such calls incorporate signals of need and at the same time act as reliable indicators of each chick's identity.

Furthermore, these signal properties suggest that the assessment of signals of need can be improved if the signal value is referenced to a chick's vocal spectrum.

Consequently, in species where selection favours individual recognition, begging calls are likely to incorporate both identity cues and signals of need.

Many studies have also shown that begging calls incorporate information about a chick's energy requirements or body condition (i.e. signals of need) in an effort to solicit food from parents or compete with siblings [e.g. [ 15- 19]].

Finally, the mechanisms of compensatory growth, including possible increases in the cuckoo chicks' signaling of need for parental provisioning following egg tossing, still remain to be elucidated.

Thus, reduced mass gain was not paralleled by a reduced development rate of the gape area, suggesting that increased allocation may have been channeled towards gape growth relative to mass [20], so as to maintain an adequate visual signal of need [23].

However, experimental evidence, i.e. playback experiments testing specific acoustic parameters, is necessary to test whether parents perceive and use hunger related variation as a signal of need.

These results suggest that although the acoustical properties of calls can provide instantaneous cues to the chick's begging behaviour in other species, these cues may not be necessary components of the signal of need in chicks of uniparous species.

Two mechanisms might be responsible for the test rat's awareness of their experimental partner's need: 1) The donor may gain information about the hunger level through the signalling of need by the receiver.

Signals of identity need to be relatively consistent over time within individuals to reliably indicate the senders identity [for review see [ 1]].