Environmental Biology of Fishes

, Volume 58, Issue 3, pp 289–295

Swimming Performances of Four California Stream Fishes: Temperature Effects

  • Christopher A. Myrick
  • Joseph J. Cech

DOI: 10.1023/A:1007649931414

Cite this article as:
Myrick, C.A. & Cech, J.J. Environmental Biology of Fishes (2000) 58: 289. doi:10.1023/A:1007649931414


The critical swimming velocity (Ucrit) of four California stream fishes, hardhead, Mylopharodon conocephalus, hitch, Lavinia exilicauda, Sacramento pikeminnow, Ptychocheilus grandis, and Sacramento sucker, Catostomus occidentalis was measured at 10, 15, and 20°C. Hardhead, Sacramento sucker, and Sacramento pikeminnow swimming performances tended to be lowest at 10°C, higher at 15°C, and then decreased or remained constant at 20°C. Hitch swimming performance was lower at 10°C than at 20°C. There were no significant differences among species at 10 or 15°C, although pikeminnow and hitch were ca. 20% slower than hardhead or sucker. At 20°C hardhead, Sacramento sucker, and Sacramento pikeminnow had remarkably similar Ucrit but hitch were significantly (by 11%) faster. We recommend that water diversion approach velocities should not exceed 0.3 ms−1 for hitch (20–30 cm total length) and 0.4 ms−1 for hardhead, Sacramento pikeminnow, and Sacramento sucker (20–30 cm TL).

Cyprinidae Catostomidae hardhead Mylopharodon conocephalus hitch Lavinia exilicauda Sacramento pikeminnow Ptychocheilus grandis Sacramento sucker Catostomus occidentalis critical swimming velocity water diversion 

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Christopher A. Myrick
    • 1
  • Joseph J. Cech
    • 3
  1. 1.Department of Wildlife, Fish, and Conservation BiologyUniversity of CaliforniaDavisU.S.A.
  2. 2.Department of Fishery and Wildlife BiologyColorado State UniversityFort CollinsU.S.A.
  3. 3.Department of Wildlife, Fish, and Conservation BiologyUniversity of CaliforniaDavisU.S.A.

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