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Fig. 5. Changes in the biochemical composition of the gonad of P.
depressus during gametogenesis. To standardize the change in the gonadal
size, the level of each component shown in
Fig. 4 was multiplied by the
average gonad index at each stage shown in
Fig. 3. Thus the values
represent the amount of each component of the gonad in animals at a body mass
of 100 g. (A) Ovary, (B) testis. Protein includes major yolk protein (MYP),
denoted by diagonal stripes, and other proteins.