A method has been developed for the continuous automated monitoring
of cardiac output in adult rainbow trout. Average cardiac output measured under
control conditions and varied environmental conditions of hypoxia and post-hypoxia
was significantly higher (P≤ 0.05) in male than female trout. The cardiac
output of trout in spawning condition...
Non-vascularized hearts of buffalo sculpin (Enophrys bison)
were used to investigate the cardiac toxicity of compounds that
cause methemoglobinemia. The affinity of sculpin cardiac myoglobin
for oxygen (P50 = 1.10 torr at 20 C°, pH 7.8) was lower than that of
mammals studied (P50 = .44 and .76 torr for...