. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. MULTIPAROUS FEMALES 441 Table 24. Monthly frequencies of non-pregnant mature females at South Georgia (1927-35) and the estimated cumulative frequencies of ovulations in this class assuming a corpus luteum life of 15 or 20 days. See text for explanation 15 days 20 days No. non- No. of A A t No. mature pregnant ovulations No. of No. of Percentage from (1) Percentage from (3) Percentage from (5) ovulations Cumulative ovulations Cumulative Month Catch immature and (2) non-pregnant and
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. MULTIPAROUS FEMALES 441 Table 24. Monthly frequencies of non-pregnant mature females at South Georgia (1927-35) and the estimated cumulative frequencies of ovulations in this class assuming a corpus luteum life of 15 or 20 days. See text for explanation 15 days 20 days No. non- No. of A A t No. mature pregnant ovulations No. of No. of Percentage from (1) Percentage from (3) Percentage from (5) ovulations Cumulative ovulations Cumulative Month Catch immature and (2) non-pregnant and (4) ovulations and (6) (7)X2 frequency (7)x i'5 frequency (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (") September 195 (20-0) 156 (10-0) 16 (46) 7 14 14 11 11 October 1348 24-1 1013 150 152 40 61 122 136 91 102 November 1930 15-2 1637 22'I 362 33 121 242 378 181 283 December 2919 18-6 2376 18-0 428 26 111 222 600 166 449 January 37H 30-7 2574 29-9 77° 20 154 308 908 231 680 February 2136 44'5 1185 50-6 600 â 3 78 156 1064 117 797 March 879 46-0 475 67-7 322 7 23 46 mo 34 831 April 208 33'3 139 73'3 102 0 0 0 mo 0 831 100. > 30- , - / 1 :â1ââârâââr râ-â D J F MONTHS O N D J MONTHS b M M Text-fig. 48. a, Monthly '% pregnant', South Georgia 1925-31 (full line), pelagic 1932-52 (broken line), b. Monthly frequency of pregnant (full line) and non-pregnant females (broken line) in the South Georgia catches 1927-35. recent ovulations (uncorrected for the active life of the corpus luteum), is then obtained as described above (Text-fig. 47), and the number of recent ovulations observed in each month (column (7)) is obtained by applying these percentages to the estimated number of non-pregnant females in the catch. The question of the proportion of lactating whales in the monthly samples is discussed in the next section (p. 448), and it is shown that there are relatively large numbers at South Georgia from December onwards, but that very few enter the pelagic grounds u
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