The phrase "aggressive signal" is correct and usable in written English.
It can be used in contexts where you are describing a signal that is forceful or assertive, often in communication or behavioral contexts.
Example: "The aggressive signal from the leader indicated that immediate action was required from the team."
Alternatives: "forceful signal" or "assertive signal".
"It's an aggressive signal".
To some China experts in the United States military, that was an aggressive signal to Washington that China could challenge the United States Navy in waters around Taiwan.
As growls are primarily an aggressive signal [15], the rapid cross-modal attribution of a growl to a size-matched caller could be vital during group interactions.
Searcy and Beecher (2009) postulated three criteria that should be met to establish that a given singing behavior is an aggressive signal.
The coincidence of chemical signalling and aggressive behaviour in both females and males suggests that urine release has evolved as an aggressive signal in both sexes of crayfish.
Searcy and Beecher [ 34] postulated three criteria that should be met to establish that a given singing behavior is an aggressive signal.
They identified nine aggressive signals and six submissive signals in at least some of the dogs, but only one breed, the huskies, showed all 15 of them.
Submissive signals are often the precise opposite in form from a species' aggressive signals and may consist of an averted gaze or a closed mouth.
In response to increased call intensity, males may employ acoustic response by making temporal [14], [42], [43], spectral [14], [44], [45], [46], [47], or amplitude [45] adjustments to the advertisement signals or by producing qualitatively different aggressive signals [48], [49].
In this species, songs that attract females during the breeding season function as aggressive signals for defending food resources during the non-breeding season.
Don't pat him on the head or hug him, as these are, in dog language, aggressive signals.
