. 15 16 17 LENGTH GROUPS (METRES) Fig. 152. Blue whales {continued). Length frequencies for different periods. Females. Males. of comparatively uniform prominence. Perhaps the best example is furnished by the figures for males and females in the half-season February to May 1925. There are three maxima for each sex showing that males are commonest at 18-19 "^v 21 m. and 24 m. and less numerous at 20 m. and 22-23 '^â¢' ^^^ that females are more numerous at 20 m., 23 m. and 26 m. and less numerous at 21-22 m. and 24 m. In other words these whales tend to approximate to one of three different
. 15 16 17 LENGTH GROUPS (METRES) Fig. 152. Blue whales {continued). Length frequencies for different periods. Females. Males. of comparatively uniform prominence. Perhaps the best example is furnished by the figures for males and females in the half-season February to May 1925. There are three maxima for each sex showing that males are commonest at 18-19 "^v 21 m. and 24 m. and less numerous at 20 m. and 22-23 '^â¢' ^^^ that females are more numerous at 20 m., 23 m. and 26 m. and less numerous at 21-22 m. and 24 m. In other words these whales tend to approximate to one of three different sizes which may be regarded as (i) small immature (18-19 m. in males, 20 m. in females), (2) large immature (21 m.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectocean, booksubjectsci
