. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2<S MILTON FINGERMAN LJ o £ c/l O I a. O u. 0 I 2 HOURS FIGURE 1. Relationships between the mean leucophore stage of eyestalkless prawns in- jected with extracts prepared from 8 or 16 eyestalks versus time following injection. Half- filled circles, control; other symbols, mean responses of groups of prawns that received an injection of eyestalk extract. A different extract was injected into each group of prawns. Final extract concentrations is: one-half eyestalk equivalent per dose. of 3 to extracts of eyestalks in an att
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2<S MILTON FINGERMAN LJ o £ c/l O I a. O u. 0 I 2 HOURS FIGURE 1. Relationships between the mean leucophore stage of eyestalkless prawns in- jected with extracts prepared from 8 or 16 eyestalks versus time following injection. Half- filled circles, control; other symbols, mean responses of groups of prawns that received an injection of eyestalk extract. A different extract was injected into each group of prawns. Final extract concentrations is: one-half eyestalk equivalent per dose. of 3 to extracts of eyestalks in an attempt to resolve the apparently incompatible reports of the effect of these extracts. Eyestalks from 4-8 prawns were triturated in sufficient saline to yield an extract containing one-half of an eyestalk equivalent per dose of ml. When four such extracts were assayed, each on five eye- stalkless prawns, the effects (Fig. 1) ranged from pigment concentration alone to pigment dispersion alone with the intermediate condition of transitory con- centration of the white pigment followed by a pigment-dispersing response. The controls received isosmotic sea water alone. A possible interpretation of the transitory concentration of the white pigment which was followed by dispersion was that because the extracts were prepared from 8-16 eyestalks in sufficient saline to provide a final concentration of one-half eyestalk equivalent per dose, some eyestalks if extracted singly would evoke only a white pigment-dispersing response while others only a white pigment-concentrat- ing response, and that the mixed response was the result of mixing the two types of eyestalks. To determine whether this interpretation might be the correct one 13 extracts were prepared, each from one eyestalk from 13 different prawns. Each eyestalk was triturated in ml isosmotic sea water, to provide a final. Please note that these images are extracted from scanned page images that may have been digitally enhan
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
