Some Endrin Relationships in Resistant and Susceptible Populations of Golden Shiners, Notemigonus Crysoleucas

Abstract
A 1000 ppb endrin solution killed 50 suceptible golden shiners in 75 min. but only 40 of 50 resistant shiners in 40 hr. Endrin residues in whole bodies of resistant shiners killed in endrin were as much as 82 times those of susceptible shiners. Endrin concentrations in the blood of living resistant shiners were as much as 64 times greater than those of endrin-killed susceptible shiners. The use of a critical concentration in the blood for diagnosis of endrin-caused mortality must be based on the tolerances of local populations and may be invalid when applied to an entire species containing resistant populations.

This publication has 2 references indexed in Scilit: