William D. Swink
Carol Cotant Edsall
2001
<p><span>A laboratory study examined changes in the blood chemistry of field-caught and hatchery-reared lake trout </span><i>Salvelinus namaycush</i><span> subjected to a nonlethal attack by sea lampreys </span><i>Petromyzon marinus.</i><span> We measured glucose, total protein, amylase, alkaline phosphatase (ALKP), alanine aminotransferase (ALT), aspartate aminotransferase (AST), creatine kinase, calcium, magnesium, triglycerides, sodium, and potassium with a Kodak Ektachem DT60 Analyzer, Ektachem DTSC Module, and the DTE Module. Mean levels of total protein, AST, ALKP, hematocrit, calcium, magnesium, and sodium decreased significantly (</span><i>P</i><span> ≤ 0.05), and mean levels of ALT and potassium increased significantly (</span><i>P</i><span> ≤ 0.05) after sea lamprey feeding. Lake trout condition (</span><i>K</i><span>) and hematocrit levels also decreased significantly (</span><i>P</i><span> ≤ 0.05) after the sea lamprey attack. Frequency distributions of eight lake trout blood chemistry variables and the hematocrit were significantly different before and after a sea lamprey attack. A second study that used hatchery lake trout broodstock measured changes in hematocrit before and after a sea lamprey attack.</span></p>
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10.1577/1548-8667(2001)013<0051:EONSLA>2.0.CO;2
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American Fisheries Society
Effects of nonlethal sea lamprey attack on the blood chemistry of lake trout
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