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Fig. 3. (A) Heart rate, (B) stroke volume and (C) cardiac output of tadpole shrimp
reared under normoxic (1921 kPa O2; open circles),
moderately hypoxic (1013 kPa O2; gray circles) or severe
hypoxic (13 kPa O2; black circles) conditions exposed to
normoxic (20 kPa O2) and hypoxic (10, 5 and 2 kPa O2)
conditions. Values are means ± s.e.m. (N
13). Significance
is assumed at the level of P<0.05: asignificant
difference from control animals at same PO2;
bsignificant difference from the same animal at preceding
PO2; csignificant difference from
the same animals at 20 kPa O2.