Magnetic sense in the Japanese eel, Anguilla japonica, as determined by conditioning and electrocardiography
Magnetic sense in the Japanese eel, Anguilla japonica, as determined by conditioning and electrocardiography
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DOI：
10.1242/jeb.01131
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发表时间：
2004-08-01
影响因子：
2.8
通讯作者：
Matsumoto, K
中科院分区：
文献类型：
--
作者：
Nishi, T;Kawamura, G;Matsumoto, K
用条件反射法和心电图法研究了日本鳗鲡的磁敏感性。海水鳗鱼、河鳗鱼和养殖鳗鱼被置于一个平行于鱼体的磁场中，磁场的大小在12 663 nT ~ 192 473 nT之间，磁场的位置沿着地球的东西轴。心电图记录电极放置在靠近鱼体内的PVC管庇护所。经过10-40次条件反射后，所有鳗鱼对192 473 nT的磁场和12 663 nT的磁场（分别相当于本实验室水平地磁场（32 524 nT）的5.92倍和0.38倍）都表现出明显的条件反射（即心跳减慢）。外加磁场的东西向矢量（12663 nT）与地磁场的矢量相结合，产生了偏东21度的水平合成磁场。因此，无论是在海上、河流中还是在养殖场中，日本鳗鱼都具有磁敏感性。本研究的结果进行了比较，与过去的研究表明，没有磁性的感觉，在美国鳗鱼，长吻鳗鲡，欧洲鳗鱼，安圭拉。
Magnetosensitivity of the Japanese eel, Anguilla japonica, was examined by conditioning and electrocardiography. Marine eels, river eels and farmed eels were conditioned to an imposed magnetic field ranging from 12 663 nT to 192 473 nT parallel to the fish body, which was placed along the earth's west-east axis. Electrocardiograms were recorded with electrodes placed close to the fish body inside a PVC pipe shelter. After 10-40 conditioning runs, all the eels exhibited a significant conditioned response (i.e. slowing of the heart beat) to a 192 473 nT magnetic field and even to a 12 663 nT magnetic field, respectively equivalent to 5.92X and 0.38X the horizontal geomagnetic field (32 524 nT) at our laboratory. The west-east vector of the imposed magnetic field (12 663 nT) combined with that of the geomagnetic field and produced a horizontal resultant magnetic field of 21degrees easterly. Therefore, Japanese eel are magnetosensitive whether they are at sea, in the river or in the farm. Results of the present study were compared with those of past studies that showed no magnetic sense in the American eel, Anguilla rostrata, and the European eel, Anguilla anguilla.