Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Quantitative analysis of background matching of Sepia officinalis
Student Author(s): Pasternak, Dahna
Faculty Advisor(s): Denny, Mark
%E Thompson, Stuart
Pages: 29
Location: Final Papers Biology 175H
Date: June 1987
Keywords: biology of cephalopods
Abstract: The common cuttlefish, Sepia officinalis, is able to exhibit a wide variety of body patterns. Past studies have analyzed the animal's ability to camouflage itself using subjective methods. This study encorporated two objective methods, overall tone analysis and spatial frequency of pattern analysis, to examine how well the animal was matching its background. On its natural background, sand, the cuttlefish matched both tone and pattern. On an unnatural background, such as a uniform gray, one animal matched tone, one matched pattern and one attempted to match both tone and pattern. An analysis combining subjective methods and the quantitative methods described in this paper offer a more definitive method for judging the degree to which the animal can match the surrounding environment in behavioral tests.