National Taiwan Ocean University Institutional Repository:Item 987654321/44671
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 26988/38789
造访人次 : 2350928      在线人数 : 36
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 进阶搜寻

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44671

题名: Tracking of Japanese eel Anguilla japonica by ultrasonic transmitter in the southwestern waters of Taiwan
作者: Kuo, C.L.;Nakamura, A.;Tsukamoto, K.;Suzuki, K.;Liao, I C.
关键词: Japanese eel;Tracking;Ultrasonic transmitter;Movement
日期: 1996
上传时间: 2017-11-24T03:11:11Z
摘要: Abstract:
Artificially induced maturing Japanese eels, Anguilla japonica, were released in southwestern waters of Taiwan on 26-28 January 1994, and tracked with ultrasonic transmitter to collect informations on the spawning migration of this species. Among five eels tagged with identical transmitters, different type of signals, pulse length and frequency, two specimens moved southeastward (137.2 ° ), while the other two swam northwestward (328.4 ° and 347.0 ° ). The direction of movement, except No. 5 specimen, coincided with the tidal currents of release time and location. The last eel (No. 5) was lost 5 minutes after release because of a rapid movement. Northwestward movement of the eel might be explained as a preference for deeper waters, just as observed in European eel. The distance between the release point and the end of tracking ranged from 490m to 750m. Mean swimming speed during tracking ranged from 0.5 to 40.1 cm/sec. The changes in strength and direction of the signals indicated that the eels seemed to swim downward to the sea bottom just after the release and might be moving in and out of a "shelter" or "hole" at the bottom. Once the eel dived and reached the bottom, they might move little either horizontally or vertically.
關聯: 23(4), pp.279-287
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44671
显示于类别:[廖一久院士專區] 期刊論文

文件中的档案:

没有与此文件相关的档案.



在NTOUR中所有的数据项都受到原著作权保护.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈