The Scope for Mortality Caused by Sea Lamprey

Abstract
Subsequent to development of the lampricide program, sea lampreys Petromyzon marinus in Lake Michigan have demonstrated increased growth rates in parallel with expanded stocking rates of salmon and trout. Based on bioenergetics modeling of maximum and minimum growth and feeding rates, I estimated sea lamprey effects as the “scope for mortality,” which depends on host size and sea lamprey size, For small host fishes, sea lamprey-induced mortality may have increased approximately sixfold over the past two decades.

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