Colour change in cephalopods (Mollusca, Cephalopoda)

Dobrović, Ana (2012) Colour change in cephalopods (Mollusca, Cephalopoda). Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Body pattern in cephalopods consists of chromatic, textural, postural and locomotor components. They are made up of units, and a unit consists of elements – pigmented chromatophores, structural reflecting cells and skin muscles. Stunning optical effects of body patterns and their rapid changes is enabled primarily due to neurally controlled chromatophores. Within each chromatophore there is a cytoelastic sacculus with pigment, attached to a set of radial muscles, each with its nerves. Expansion and contraction of the muscles is controlled by a set of lobes in the brain organized hierarchically. In this way cephalopods can change their body pattern instantly for camouflage or to communicate. Camouflage is an important anti-predatory tactics, and the main reason of chromatophore evolution. It’s achieved by merging with the background, countershading, disruptive coloration and deceptive resemblance. Cephalopods also use their body patterns to communicate with predators and prey, and to find partners.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Lajtner, Jasna
Date: 2012
Number of Pages: 17
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 13 Oct 2014 08:53
Last Modified: 13 Oct 2014 08:53
URI: http://digre.pmf.unizg.hr/id/eprint/3009

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