Aposematism

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Related to aposematic coloration: cryptic coloration, Mullerian mimicry
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Aposematism

 

(also warning coloration and form), one of the types of protective coloration and form in animals. Aposematic coloration, which contrasts with the animal’s background, is demonstrated suddenly in response to danger and is usually combined with a threatening pose and sounds.

The back wings of certain moths of the family Sphingidae and the genus Noctuidae, as well as cicadas, locusts, and mantises, have eyelike spots or bright bands. Normally these insects are not noticeable, owing to cryptic coloration. When an enemy approaches, however, they open their back wings and unexpectedly reveal their bright coloring, which frightens off the predator. Caterpillars of the family Sphingidae assume a threatening pose, raising the front portion of the body slightly and inflating the thorax, on which eyelike spots protrude in some species. Octopuses, agamas, and chameleons assume a threatening pose and acquire vivid coloration; many reptiles also hiss. The death’s-head moth emits a sharp squeak by releasing air from its foregut.

Aposematism protects animals from predators and gives them an advantage in the struggle for life.

I. KH. SHAROVA

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Aposematic coloration and mimicry in opisthobranch mollusks: new phylogenetic and experimental data.
Community structure and the evolution of aposematic coloration. Ecol.
The conspicuous nudibranch Polycera quadrilineata: aposematic coloration and individual selection.
I studied the relative timing of the evolution of aposematic coloration and gregariousness in butterfly larvae and reached the following conclusions (Sillen-Tullberg 1988).
The correlation between gregariousness and aposematic coloration in butterfly larvae has been analyzed at the generic level and at lower levels only when necessary to "catch" changes in the character life-style.
For example, consider the study of the relative timing of gregariousness and aposematic coloration in butterfly larvae (Sillen-Tullberg 1988).