. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 368 HARRY BEAL TORREY AND BENJAMIN HORNING. will emphasize these facts. Fig. 4 is from a photograph of No. 4 Table I, a typical control female twelve weeks old. Fig. 5 is from a photograph of No. 13, Table I, a typical thyroid-fed female of the same \ FIG. 3. R. I. R. male (No. 15 of Table I.) twelve weeks old, thyroid fed for eight weeks. Rectrices well developed. There was no essential difference between the last two birds at the time the photographs were taken. The conclusion, however, that thyroid feeding does not
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 368 HARRY BEAL TORREY AND BENJAMIN HORNING. will emphasize these facts. Fig. 4 is from a photograph of No. 4 Table I, a typical control female twelve weeks old. Fig. 5 is from a photograph of No. 13, Table I, a typical thyroid-fed female of the same \ FIG. 3. R. I. R. male (No. 15 of Table I.) twelve weeks old, thyroid fed for eight weeks. Rectrices well developed. There was no essential difference between the last two birds at the time the photographs were taken. The conclusion, however, that thyroid feeding does not affect the female plumage at this age must not be hastily drawn. When thyroid-fed chicks are compared with controls at an earlier age, evidence is obtained to show that thyroid feeding accelerates the development of both rectrices and contour feathers in females as well as males. In Table II. such evidence is summarized. The chicks were 51 days old. Eight days after hatching, thyroid feeding had been begun with 15 mgms. as the initial daily ration, in capsule as. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
