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Figure 3


Fig. 3. Red-eyed treefrog embryo rapidly moves to reposition itself with external gills in the well-oxygenated region near the air-exposed egg surface, after experimental manipulation to position gills in the hypoxic rear of the egg. Embryos are 3 days old and egg diameter is ~4.9 mm; the arrow marks the experimental individual. Photos by K.M.W.





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