. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOULTING, GROWTH, AND SURVIVAL AFTER EYESTALK REMOVAL IN UCA PUGILATOR R. K. ABRAMOWITZ AND A. A. ABRAMOWITZ (From the Marine Biological Laboratory, Woods Hole, Mass.) Following the discovery of a chromatophorotropic hormone by Per- kins (1928) and more especially, following the discovery of the sinus gland and other endocrine glands in the crustacean eyestalk by Hanstrom (1933-1937) and others, considerable interest has been shown in the extra-chromatophorotropic functions of the eyestalk. Hanstrom (1937) has pointed out th
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOULTING, GROWTH, AND SURVIVAL AFTER EYESTALK REMOVAL IN UCA PUGILATOR R. K. ABRAMOWITZ AND A. A. ABRAMOWITZ (From the Marine Biological Laboratory, Woods Hole, Mass.) Following the discovery of a chromatophorotropic hormone by Per- kins (1928) and more especially, following the discovery of the sinus gland and other endocrine glands in the crustacean eyestalk by Hanstrom (1933-1937) and others, considerable interest has been shown in the extra-chromatophorotropic functions of the eyestalk. Hanstrom (1937) has pointed out that the endocrine glands discovered by him are present in various crustaceans which have either no chromatophores or show no metachrosis. Nevertheless, extracts prepared from the eyestalks of such animals are effective on the chromatophores of standard test animals. On these grounds, Hanstrom has suggested that the chromatophore hor- mone (s) may have other and more significant functions. It is also equally possible, however, that the eyestalk produces other hormones (besides the chromatophore activating system) which have significant functions in the life of the crustacean. Among the various effects attributed to the eyestalks as based on ex- periments of either eyestalk extirpation or of the injection of eyestalk extracts, the relation between the eyestalks and the moulting process of crustaceans is of great intere'st. In our study of the specificity of the chromatophorotropic hormone of Uca (Abramowitz and Abramowitz, 1938), we observed that animals deprived of their eyestalks moulted more frequently than normal animals. We further remarked that the eyestalks did not seem to be essential to the life of this crustacean be- cause we had maintained some blinded animals throughout the summer months (11 weeks in all) at the end of which time the experiments were discontinued. We have returned to these observations in order to ob- tain some quantitative data concerning these relati
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
