On the oxygen consumption rate of the pond-cultured eel, Anguilla japonica

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An attempt was made to determine the oxygen consumption rate of the pond-cultured eel in the resting state by means of a flowing water system. On the basis of the fact that the eel, being possibly thigmotactic, remains almost motionless when a tube of appropriate dimensions is provided for it, glass tubes, which were varied in diameter and length according to the size of fish used, were employed as respiration chambers in the present investigation. The fish used in experiments were pond-reared eels ranging in body weight from about 5 to 270 g. Immediately after being taken from eel-culture ponds at about 24 hours after feeding, fish were placed in respiration chambers separately. All experiments were carried out in July at about 25°C. Succesive measurements of the oxygen uptake over a period of about a day, revealed, in almost every case, that during the early part of the experiment the rate of oxygen uptake was considerably high, but later (about 5 hours after introduction of the fish) it settled down to a lower value which remained more or less constant until it again fluctuated widely and irregularly after the lapse of about 15 hours. In the present study such a steady rate of oxygen consumption in the middle of the experiment was taken as an estimate of the resting rate of oxygen consumption. The rate of oxygen consumption of the pond-cultured eel at 25°C. thus obtained are summarized as follows; Body weight (g) 5 10 20 50 100 150 200 300 Oxygen consumption (cc./hr.) 0.75 1.2 2.0 3.8 6.2 8.3 10.2 13.5 Oxygen consumption (cc. /kg. /hr.) 150 120 100 76 62 55 51 45 These values give a straight line when the logarithm of the rate of oxygen consumption (cc./hr.) is plotted against the logarithm of the body weight. The slope of the line has a value of approximately 0.7.
日本魚類学会の論文

On the oxygen consumption rate of the pond-cultured eel, <I>Anguilla japonica</I>

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日本魚類学会 | 論文

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