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Dual control of certain black chromatophores of Crago

โœ Scribed by Brown, F. A. ;Ederstrom, H. E.

Book ID
102889006
Publisher
John Wiley and Sons
Year
1940
Tongue
English
Weight
876 KB
Volume
85
Category
Article
ISSN
0022-104X

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โœฆ Synopsis

In 1927 Koller reported that he was able to induce a dispersion of the black pigment in white-adapted Crangon by transfusion of blood from a black adapted one. He concluded that this was due to a hormonal substance circulating in the blood since a similar transfusion of blood from a white adapted animal to another one of similar adaptation did not result in darkening. The data which he obtained in these experiments appeared quite conclusive.c The following year Perkins ('28) described the eyestalk as the source of a hormonal substance which concentrated the red pigment of Palaemonetes, and the same year Koller ('28) confirmed Perkins ' work, using Crangon and other crustaceans. Koller

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โœ Fingerman, Milton ๐Ÿ“‚ Article ๐Ÿ“… 1956 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 897 KB

Dispersion and concentration of chromatophoric pigments in crustaceans are controlled by several factors. Light and temperature are the major environmental influences ; daily and tidal rhythms of color change are the primary endogenous ones. Responses to light fall into two categories: (1) primary