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Fig. 4. Changes in (A) protein, (B) lipid and (C) carbohydrate concentrations in
the pouch fluid of Syngnathus fuscus (gray squares; solid line) and
Syngnathus floridae (white diamonds; broken line) across the
progression of embryonic development. For both species, nutrient levels
significantly decline in pouch fluid over the seven stages of development
(P<0.05). The decrease in protein occurs at a steeper rate for
Syngnathus floridae, whereas lipid concentrations drop more quickly
in Syngnathus fuscus (both P<0.05).