权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Magnetic sense and direction recognition of a non-migratory fishes.

非洄游鱼类的磁感和方向识别。

基本信息

批准号：
15560043
负责人：
NISHI Takaaki
金额：
$ 1.98万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560043/
关键词：
magnetic sense orientation migration eel rock fish mud hopper 方位知覚シラスウナギティラピア

项目摘要

Magnet sensitivity studies have been related to orientation and navigation of animals. While the magnetite has been found in variety of animals, studies on the involvement of the magnetite in orientation and navigation of migratory animals are not always successful. This study examined the magnetosensitivity and ability of non-migratory fishes to orient by means of geomagnetic cues. The results obtained are as follows :1)Conditioning and electrocardiography method was employed to examine the magnetosensitiviy and found to be highly sensitive and useful method.2)With this method, magnetosensitivity was determined for eel as well as non-migratory fishes such as mud hopper, tilapia and darkbanded rockfish. Magnetosensitivity seems to be used in the local homing in these non-migratory fishes.3)Magnetosensitivity was determined for marine eels, river eels and farmed eels. Results of the present study were compared with those of past studies which showed no magnetic sense in the American eel … More and the European eel.4)Magnetosensitivity in anosmic Japanese eel was examined by conditioning and electrocardiography. Five eels from a freshwater farm were made anosmic by injection of boiling petroleum jelly (130-140℃) into the nasal cavity, a technique widely used in studies on olfaction and olfaction-related behavior of eels. The anosmic eels did not respond to the magnetic field, presumably due to damage of the olfactory organ from the jelly injection.5)Magnetosensitivity of the Japanese eel at the glass eel phase (newly metamorphosed juveniles) was examined by conditioning and electrocardiography. After 10-40 conditioning runs, all the glass eels exhibited a significant conditioned response. The results indicate that glass eels have high magnetosensitivity and probably acquire geomagnetic information that early in life. It is hypothesized that silver-phase adult eels find their way back to the oceanic spawning ground by reversing the geomagnetic direction that had been detected and ‘memorized' during the glass eel phase when migrating from the open ocean towards the continental shelf and coastal waters. Less

磁敏感性研究与动物的定向和导航有关。虽然磁铁矿已在各种动物中发现，但关于磁铁矿参与迁徙动物定向和导航的研究并不总是成功的。本研究探讨了非洄游鱼类的磁敏感性和能力，以定向通过地磁线索。结果表明：（1）用条件反射法和心电图法测定了鳗鱼的磁敏感性，结果表明，该方法灵敏度高、实用性强;（2）用该方法测定了非洄游性鱼类（泥鳅、罗非鱼和黑带石斑鱼）的磁敏感性。磁敏感性似乎被用于这些非洄游鱼类的本地归巢。3）测定了海水鳗鱼、河鳗鱼和养殖鳗鱼的磁敏感性。本研究的结果与过去的研究结果进行了比较，这些研究表明，美国鳗鱼没有磁觉 ...更多信息 4）用条件反射法和心电图法研究了无嗅觉日本鳗鲡的磁敏感性。用130-140℃煮沸的凡士林油鼻腔注射法，对5条淡水养殖鳗鱼进行了嗅觉丧失实验。无嗅觉的鳗鱼对磁场没有反应，可能是由于果冻注射损伤了嗅觉器官。5）通过条件反射和心电图检查了玻璃鳗阶段（新变态幼鳗）的日本鳗鱼的磁敏感性。在10-40次条件化运行后，所有玻璃鳗鱼都表现出显著的条件化反应。结果表明，玻璃鳗具有高磁敏性，可能在生命早期就获得了地磁信息。据推测，银相成年鳗鱼找到自己的方式回到海洋产卵场扭转地磁方向，已被检测到和'记忆'在玻璃鳗鱼阶段时，从公海向大陆架和沿海沃茨迁移。少