Document Detail


Visual contrast modulates maturation of camouflage body patterning in cuttlefish (Sepia pharaonis).
MedLine Citation:
PMID:  20695657     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Camouflage is the primary defense behavior in cephalopods. It is known that cuttlefish immediately after hatching are capable of showing various body patterns for concealing themselves, however recent studies suggest that maturation of camouflage body patterns is faster for cuttlefish (Sepia officinalis) reared in enriched environments than those reared in impoverished environments. Since camouflage patterning in cephalopods is predominately visually driven, this study specifically investigates effects of the rearing background contrast on the maturation of body patterns in cuttlefish (Sepia pharaonis). Newly hatched animals were separated into two cohorts, one reared in a uniform-gray background (low-contrast, or L group) and the other raised in a black/white checkerboard background (high-contrast, or H group). At Weeks 2, 4, 6, 8, 10, and 12, cuttlefish were placed individually either on uniform or checkerboard substrates to examine their body patterns. Animals from both L and H groups appear to show moderate disruptive patterns on the checkerboard and less disruptive on the uniform background at Week 2. Throughout development, however, cuttlefish from the H group showed stronger disruptive patterns than that of the L group on the checkerboard background at Weeks 10 and 12. In interesting findings, cuttlefish from both L and H groups showed similar strength but different disruptive components on the uniform background in later postembryonic stages. These results suggest that the maturation of camouflage body patterns in S. pharaonis is at least in part affected by visual contrast of their rearing backgrounds, although environmental complexity or social interaction is also likely to be involved in this process. This also implies that early visual experience could exert its effect on the seemingly preprogrammed behaviors such as camouflage body patterning in cephalopods.
Authors:
Yi-Hsin Lee; Hong Young Yan; Chuan-Chin Chiao
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of comparative psychology (Washington, D.C. : 1983)     Volume:  124     ISSN:  1939-2087     ISO Abbreviation:  J Comp Psychol     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-10     Completed Date:  2011-01-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8309850     Medline TA:  J Comp Psychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  261-70     Citation Subset:  IM    
Copyright Information:
2010 APA, all rights reserved
Affiliation:
Institute of Molecular Medicine, National Tsing Hua University, Hsinchu, Taiwan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Contrast Sensitivity*
Perceptual Masking*
Sensory Deprivation*
Sepia*
Skin Pigmentation*
Social Environment
Visual Perception*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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