An experimental determination of the speed of migration of salmon in the Columbia River

✍ Scribed by Greene, Charles Wilson

• Publisher: John Wiley and Sons
• Year: 1910
• Tongue: English
• Weight: 703 KB
• Volume: 9
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1400090306

✦ Synopsis

Projessor o.f Physiology, Unieersity 01 MZ'ssoi~ri Certain fishes, like some birds, carry out extensive migrations, but unlike birds, their movements are hidden from direct observation. Commercial fishermen dip their nets into the waters and learn to know many of the movements of fishes by the character of the catch. Certain fishes travel in great schools, and this tendency to herd together furnishes an easy method for following, especially those schools that swim near the surface. Presumably the migratory movement serves one of two purposes: either it is a means for providing food, or it brings fishes to the spawning ground.

The method of following the movement of fishes by the quan-tit<y of the catch is at best crude. One has no assurance that the