. Animal hormones; a comparative survey. Hormones. Eyestalkless 1 I i!Sk!i=gWjDJi£tion Sinus gland froctions Intact / > '+ insol. / Eyestalkless Eyestalkless"^® ^^Z" / sol. (d) 2 3 0 12 3 Time, hr Fig. 3-15. Reactions of the red chromatophores of the fiddler crab, Uca. id) The natural background response: the rising curve (dotted line) shows the rate of change of red chromatophores after a light-adapted specimen is transferred from a white to a black background; the falling curve (full line) shows the converse change from black to white, in constant illumination. All measure- ment
. Animal hormones; a comparative survey. Hormones. Eyestalkless 1 I i!Sk!i=gWjDJi£tion Sinus gland froctions Intact / > '+ insol. / Eyestalkless Eyestalkless"^® ^^Z" / sol. (d) 2 3 0 12 3 Time, hr Fig. 3-15. Reactions of the red chromatophores of the fiddler crab, Uca. id) The natural background response: the rising curve (dotted line) shows the rate of change of red chromatophores after a light-adapted specimen is transferred from a white to a black background; the falling curve (full line) shows the converse change from black to white, in constant illumination. All measure- ments were made over the same time of day to avoid the influence of diurnal rhythmic changes. (6) The response of intact and eye- stalkless specimens from black backgrounds to injections of Uca~ RED-DISPERSING HORMONE, URDH, from the sinus gland. Prompt dispersal occurs in the eyestalkless specimen; the dark intact specimen shows pallor first, presumably due to operative shock, (c) The response of similar specimens to injections of an extract of circumoesophageal connectives. The result indicates a short-lived action of t/ca-RED-CONCENTRATING HORMONE, URCH, but is ambiguous, {d) The responses of eyestalkless specimens to in- jections of alcohol insoluble (above) and alcohol soluble (below) fractions of a sinus gland extract, to show that the former contains most of the dispersing hormone, URDH (all from Brown, 1950).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jenkin, Penelope M. Oxford, New York, Pergamon Press
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjecthormones
