Effects of water temperature on white-spotted conger Conger myriaster activity levels determined by accelerometer transmitters

  • Tomoya HoriEmail author
  • Takuji Noda
  • Toshihiro Wada
  • Takashi Iwasaki
  • Nobuaki Arai
  • Hiromichi Mitamura
Original Article Fisheries


The effect of water temperature on white-spotted conger activity was examined using acoustic accelerometer transmitters to understand thermal effects on the behavior of a target fishery species. We recorded swimming activities of 21 congers using video cameras and compared the body undulation frequency with acceleration values measured using accelerometer transmitters in the body cavity. We found a significant, positive, linear relationship between the acceleration values and activity (body undulation frequency) of congers. We conducted a calibration trial to evaluate the relationships between conger activities and acceleration values measured using accelerometer transmitters, which confirmed the body undulation frequency of congers was associated with its swimming activity. We also examined the effect of water temperature on conger activity levels. The activity levels of eight congers at water temperatures from 10 to 28 °C were tested using accelerometer transmitters. We found a positive relationship between the conger activity levels and water temperatures between 10 and 26 °C, whereas the activity declined between 26 and 28 °C. These results demonstrate that accelerometer transmitters can quantitatively measure changes in the activity of white-spotted conger with water temperature in nature.


Accelerometer transmitter Acoustic telemetry Activity index White-spotted conger Conger myriaster Water temperature 



We would like to thank Makoto Suzuki, Ikuo Matsumoto, Kaoru Narita, and other staff of Soma Branch of the Fukushima Prefectural Fisheries Experimental Station for their support during fish collections and rearing experiments. We also thank the staff at Kyoto University Maizuru Fishery Research Station, especially Reiji Masuda, Hideki Sawada, Kohji Takahashi, and Sanshiro Kaneko for experimental support. This study was mainly supported by a grant from the Fisheries Agency of Japan.


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Copyright information

© Japanese Society of Fisheries Science 2019

Authors and Affiliations

  1. 1.Graduate School of InformaticsKyoto UniversityKyotoJapan
  2. 2.The Institute of Statistical MathematicsTachikawaJapan
  3. 3.Institute of Environmental RadioactivityFukushima UniversityFukushimaJapan
  4. 4.Fukushima Prefectural Fisheries DivisionFukushimaJapan
  5. 5.Field Science and Education and Research CenterKyoto UniversityKyotoJapan
  6. 6.CREST, Japan Science and Technology AgencySaitamaJapan

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