. D J F MONTHS Text-fig. II. Diagram to show expected changes in the shapes of the monthly foetal length frequencies for the fin whale. See text for explanation. Referring now to the average foetal growth curve for fin whales, this means that foetuses above about 475 m. in length should be under-represented in the Antarctic samples. The probable eflFect of this on the shape of the monthly length frequency curves is indicated in Text-fig. 11 bv the broken lines. The February sample should be only slightly affected, but from March onwards the eflFect on the frequency distribution should be consi
. D J F MONTHS Text-fig. II. Diagram to show expected changes in the shapes of the monthly foetal length frequencies for the fin whale. See text for explanation. Referring now to the average foetal growth curve for fin whales, this means that foetuses above about 475 m. in length should be under-represented in the Antarctic samples. The probable eflFect of this on the shape of the monthly length frequency curves is indicated in Text-fig. 11 bv the broken lines. The February sample should be only slightly affected, but from March onwards the eflFect on the frequency distribution should be considerable. Thus the model frequency curve for March becomes skewed in the reverse direction to those for December and January. This is precisely what the actual length frequencies of the monthly samples show (Text-fig. 10).
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