. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 14 MASS. EXPERIMENT STATION BULLETIN 331 P oar - n/g/i Nutrition f\ ge - 8 f I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I LI I 1 I I I I I I I i i .„ 37 35 30 £0 10 25 30 35 37 C jjoar - /7/g/i Nutrition f\ge -105 days 1 ii 1 1 1 1 11 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1ii 1 1 1 1 1 11 in 1 1 11 1 1l 1 1 1 11 37 35 30 25 £0 25 30 35 37 C. Figure 27. Kymograph Records Showing the Development of Sensitivity to Temperature Changes in the Tunica Dartos Muscle of the Boar (High Nutr
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 14 MASS. EXPERIMENT STATION BULLETIN 331 P oar - n/g/i Nutrition f\ ge - 8 f I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I LI I 1 I I I I I I I i i .„ 37 35 30 £0 10 25 30 35 37 C jjoar - /7/g/i Nutrition f\ge -105 days 1 ii 1 1 1 1 11 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1ii 1 1 1 1 1 11 in 1 1 11 1 1l 1 1 1 11 37 35 30 25 £0 25 30 35 37 C. Figure 27. Kymograph Records Showing the Development of Sensitivity to Temperature Changes in the Tunica Dartos Muscle of the Boar (High Nutrition — Normal.) Records were taken on isolated muscle strips. Time is in one-minute intervals on the base line, and temperatures are recorded in °C. Low Nutrition In an earlier section a series of boar pigs that were fed on a low plane of nutrition is described. Records were made of the reactions of strips of the tunica dartos from these boars at the time of castration. The altitudes of con- tractions observed in strips of tissue from these animals are given in Table 9, along with figures from litter-mate controls fed on a high plane of nutrition. Three of the records of the low-nutrition group are shown in Figure 28. The figures show that the tunica dartos had not developed as much in the low-nutrition group at 105 days and over as it had in the high-nutrition group. The development of the testes was also retarded, as already noted. Since the tunica dartos seems to depend upon the testicular hormone for its development,. 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 Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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