. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 342 DISCOVERY REPORTS animals are presented in Text-fig. i. The records for immature females are not of course representative of the whole class of immatures, for, owing to the operation of the minimum length regulations, they include only those animals which are nearing sexual maturity. The intersection of the curves for immature and non-pregnant mature ovaries is at 0-6 kg. and for immature and pregnant ovaries at 0-95 kg., but owing to the wide variation in ovary weight near puberty there is
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 342 DISCOVERY REPORTS animals are presented in Text-fig. i. The records for immature females are not of course representative of the whole class of immatures, for, owing to the operation of the minimum length regulations, they include only those animals which are nearing sexual maturity. The intersection of the curves for immature and non-pregnant mature ovaries is at 0-6 kg. and for immature and pregnant ovaries at 0-95 kg., but owing to the wide variation in ovary weight near puberty there is a considerable overlap. Between immature and non-pregnant mature, the overlap is from 0-25 to 175 kg., and between immature and pregnant from 075 to 175 kg. It is not, therefore, possible to distinguish between all immature and mature females on the basis of ovary weight. The mean ovary weights for the different classes are shown in Table 1. The difference between the mean ovary weight of pregnant and non- pregnant mature females is both absolutely and proportionately much greater than Chittleborough (1954) noted for the humpback whale, and is statistically significant. COMBINED OVARY WEIGHT * * IMMATURE NON-PREGNANT PREGNANT. SINGLE OVARY WEIGHT 3 c NON PREGNANT « • PREGNANT WITH ?•-—• PREGNANT WITHOUT C L 5 6 7 KILOGRAMS. 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 Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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