CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Marine and Freshwater Research   
Marine and Freshwater Research
Journal Banner
  Advances in the aquatic sciences
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Structure
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Research Fronts
Virtual Issues
Sample Issue
For Authors
General Information
Submit Article
Author Instructions
Open Access
For Referees
General Information
Review an Article
Referee Guidelines
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates
Library Recommendation

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter logo LinkedIn


Article << Previous     |     Next >>   Contents Vol 54(4)

Swimming behaviour and migration of a swordfish recorded by an archival tag

Mio Takahashi, Hiroshi Okamura, Kotaro Yokawa and Makoto Okazaki

Marine and Freshwater Research 54(4) 527 - 534
Published: 26 August 2003


An archival tag equipped with sensors for temperature, depth and luminous intensity is an excellent method to elucidate behaviour and migration of marine organisms. Herein, what we believe is the first successful archival tag experiment with swordfish in the world is reported. The swordfish, which was harpooned with an archival tag encased in a plastic capsule, was released in July 1999 off the east coast of Japan. The fish was recaptured by a harpoon fishing vessel in June 2000, only 103 km from the tagging location and weighed approximately 120-kg. By comparing the water temperature data of the archival tag with oceanographic data, a cyclic seasonal migration between the food-rich Oyashio cold current area (40–45°N) during summer and the subtropical wintering area (10–20°N) was suggested. During most of the days of observation and for the majority of the time within a day, tagged fish swam in cold water (3–6°C) and deeper than approximately 200 m; at night, fish generally stayed near the warmer surface waters (21–27°C). The greatest swimming depth was approximated to be 900 m, deduced from ambient water temperature data. The swimming depth and behaviour pattern changed in response to the ambient water temperature.

Keywords: diel patterns, vertical distribution, water temperature, Xiphias gladius.

Full text doi:10.1071/MF01245

© CSIRO 2003

blank image
Subscriber Login

PDF (802 KB) $25
 Export Citation
Legal & Privacy | Contact Us | Help


© CSIRO 1996-2016