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Some Harmful Effects of the Electric Shocker on Large Rainbow Trout
Author(s) -
Hauck Forrest R.
Publication year - 1949
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1947)77[61:sheote]2.0.co;2
Subject(s) - rainbow trout , hatchery , salmo , fishery , trout , anatomy , biology , fish <actinopterygii> , dissection (medical) , zoology
The use of the electric shocker in the salvage of rainbow trout (Salmo gairdnerii) from an irrigation canal is described. An account is given also of physiological effects observed during shocking and the morphological effects determined by dissection. In order to determine the effects of shocking, the trout were transferred to a holding pond at a state fish hatchery and observed for 2 to 5 days before being released. Dissection of some of these specimens disclosed fractured vertebrae, ruptured arteries and veins, hemorrhaging, death of tissues (secondary), curvature of the spine, and extreme dilation of blood vessels in various parts of the body, including the brain. The possibilities of the application of the shocker to other phases of fishery management are discussed.