Smith D G, Duiker W, Cooke I R
J Exp Zool. 1983 Apr;226(1):37-43. doi: 10.1002/jez.1402260106.
Branchial and cutaneous O2 uptake as well as branchial ventilatory stroke volume and frequency were measured by twin-chamber respirometry in conscious unoperated eels (Anguilla australis) at 20 degrees C. The branchial ventilatory pattern comprised alternating periods of apnea and eupnea, together constituting a "Standard Breathing Cycle" (SBC = 1 apneic period plus the ensuing period of eupnea). SBC time in 17 eels averaged 15.5 min of which only 23% was devoted to eupnea. Reduction of the PO2 of inspired water from 155 to 80 torr significantly increased the proportion of time devoted to eupnea to 49% of SBC time without significantly changing SBC time. Absolute cutaneous O2 uptake (5.8 ml O2 X h-1 X kg-1) was largely independent of the frequency or occurrence of eupnea, with the relative contribution of the skin to total O2 uptake averaging 47%. The histological appearance of the skin in A. australis is very similar to that described in A. anguilla: eel skin is only poorly vascularized. It was concluded that the skin may contribute to O2 requirements other than its own, and that this adaptation is a consequence of the unusual intermittent pattern of gill ventilation.
在20摄氏度下，通过双室呼吸测定法对未手术的清醒澳洲鳗鲡（Anguilla australis）测量鳃和皮肤的氧气摄取量以及鳃通气冲程容积和频率。鳃通气模式包括呼吸暂停和正常呼吸的交替期，共同构成一个“标准呼吸周期”（SBC = 1个呼吸暂停期加上随后的正常呼吸期）。17条鳗鱼的SBC时间平均为15.5分钟，其中只有23%用于正常呼吸。将吸入水中的PO2从155托降至80托，显著增加了用于正常呼吸的时间比例，占SBC时间的49%，而SBC时间没有显著变化。绝对皮肤氧气摄取量（5.8毫升O2×h-1×kg-1）在很大程度上与正常呼吸的频率或发生情况无关，皮肤对总氧气摄取的相对贡献平均为47%。澳洲鳗鲡皮肤的组织学外观与欧洲鳗鲡（A. anguilla）中描述的非常相似：鳗鱼皮肤血管化程度很低。得出的结论是，皮肤可能有助于满足除自身之外的氧气需求，并且这种适应是鳃通气异常间歇性模式的结果。
