EMG telemetry studies on upstream migration of chum salmon in the Toyohira river, Hokkaido, Japan
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The movements of 28 adult chum salmon, Oncorhynchus keta (Walbaum) tagged with electromyogram (EMG) transmitters were tracked along the Toyohira river, Hokkaido, Japan, in October of 2007 and 2008 to investigate and evaluate the upstream migratory behavior through the protection bed and fishway of ground sills. The approach time of fish that ascended successfully through the protection bed and fishway was shorter than that of unsuccessful fish. The unsuccessful fish were observed to swim in currents with high water velocity and shallow water depth at swimming speeds that exceeded their critical swimming speed (U crit) during the approach to these structures. In consequence, unsuccessful fish frequently alternated between burst and maximum sustained speeds without ever ascending the fishway, and eventually became exhausted. It is important that fishway are constructed to enable chum salmon to find a passage way easily, so that they can migrate upstream rapidly without wasting excessive energy.
KeywordsGround sill Protection bed Fishway EMG telemetry Chum salmon
We thank the following for their help and cooperation: Mr. Y. Okamoto (Sapporo Salmon Museum) for providing experimental animals and Prof. K. Tsumura and Prof. K. Yano for providing the swimming chamber and facilities in Hokkaido Campus of Tokai University. This study was supported in part by a Research Fellowship for Young Scientists to Y. M. (195295) from the Japanese Society for the Promotion of Science (JSPS) as well as Grant in-Aid for Scientific Research (A) (18208017) from JSPS, and the Foundation of Riverfront Improvement and Restoration to H. U.
- Beamish FWH (1978) Swimming capacity. In: Hoar WH, Randall DJ (eds) Fish Physiology. Academic Press, New York, pp 101–187Google Scholar
- Bell WM, Terhune LDB (1970) Water tunnel design for fisheries research. Tech Rep Fish Res Board Can 195:1–69Google Scholar
- Brett JR (1995) Energetics. In: Groot C, Margolis L, Clarke WC (eds) Physiological Ecology of Pacific salmon. Univ British Columbia Press, Vancouver, pp 1–68Google Scholar
- Hinch SG, Cooke SJ, Healey MC, Farrell AP (2006) Behavioural physiology of fish migrations: salmon as a model approach. In: Sloman K, Balshine S, Wilson R (eds) Fish Physiology. Academic Press, New York, pp 239–295Google Scholar
- Pon LB, Hinch SG, Cooke SJ, Patterson DA, Farrell AP (2009a) A Comparison of the Physiological Condition, and Fishway Passage Time and Success of Migrant Adult Sockeye Salmon at Seton River Dam, British Columbia, under Three Operational Water Discharge Rates. North American J Fish Manag 29:1195–1205CrossRefGoogle Scholar
- Scruton DA, Booth RK, Pennell CJ, Cubitt F, McKinley RS, Clarke KD (2007) Conventional and EMG telemetry studies of upstream migration and tailrace attraction of adult Atlantic salmon at a hydroelectric installation on the Exploits River, Newfoundland, Canada. Hydrobiologia 582:67–79CrossRefGoogle Scholar
- Shikhshabekov MM (1971) Resorption of the gonads in some semi-diadromous fishes of the Arakum Lakes (Dagestan USSR) as a result of regulation of discharge. J Ichthyol 11:427–431Google Scholar