The Heartbeat of Octopus Vulgaris
The Heartbeat of Octopus Vulgaris
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普通章鱼的心跳
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
M. Wells
中科院分区：
文献类型：
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作者：
M. Wells
在自由活动的章鱼中监测心率和血压。典型的静息频率（对于22° C时体重为500 g ±的动物）为40-50次/min-1，在背主动脉处测得的静息压力在收缩期为40 cm H2O，在舒张期为15 cm，在运动时脉搏为50 cm时升至100 cm或更高。心跳频率变化很小，任何需氧量的增加主要导致每搏输出量的增加。温度影响心跳频率，在7-27 °C范围内Q10约为3。全身心跳率和脉搏幅度也随着水中氧含量的变化而变化，随着氧含量的减少而减慢，并可逆地（至少在短时间内）停止在约2.5 ppm的O2。
Heartbeat frequencies and blood pressures were monitored in free-moving Octopus vulgaris . Typical resting frequencies (for animals of 500 g ± at 22° C) were 40-50 beats min−1, with resting pressures measured at the dorsal aorta of 40 cm H2O in systole and 15 cm in diastole, rising to 100 cm or more with a pulse of 50 cm in exercise. Beat frequency changes very little and any increased oxygen demand results mainly in an increase in stroke volume. Temperature affects heartbeat frequency with a Q10 of about 3 over the range 7–27 °C. Systemic heartbeat rate and pulse amplitude also change with the oxygen content of the water, slowing as this decreases and stopping, reversibly (at least for short periods), at about 2.5 parts O2 per million.