. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE SEX RATIO IN PEROMYSCUS. 157 on 309 and 1,974 broods for the incomplete and complete broods respectively. Thus we do find a difference between the sex ratios of complete and incomplete broods but we do not feel justified in regarding it as significant in view of the meagre record of identified dead. 145 140 135 130 125 120 115 110 105 100 95. 270 790 2012 706 1 FIG. 3. Variations in the mean sex ratio, according to the size of the broods. Numbers along graphs indicate numbers of individuals. Combinations of the in
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE SEX RATIO IN PEROMYSCUS. 157 on 309 and 1,974 broods for the incomplete and complete broods respectively. Thus we do find a difference between the sex ratios of complete and incomplete broods but we do not feel justified in regarding it as significant in view of the meagre record of identified dead. 145 140 135 130 125 120 115 110 105 100 95. 270 790 2012 706 1 FIG. 3. Variations in the mean sex ratio, according to the size of the broods. Numbers along graphs indicate numbers of individuals. Combinations of the in Individual Hroods. It is interesting to consider the possible tendency of members of a litter to agree with one another in respect to sex, that is, whether or not we encounter broods consisting entirely of the same sex more frequently than would result from chance. In the following table, using the combined data, we have arranged broods of each size in groups according to the number of each sex present. For example, broods of three present four possible combinations: 3 <5 , 2 £ + i 9 , r <J -j- 2 9,39. The actual num- ber of complete broods containing a given combination of males. 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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