|SREL Reprint #0730|
Distributions of the Concentrations of Essential and Nonessential Elements in
Largemouth Bass, Micropterus Salmoides
E. Pinder, III and John P. Giesy
From data on elemental concentrations in human tissues, Liebscher and
Smith (1968) hypothesized that the frequency distributions of concentrations for
essential elements were normal distributions, whereas the frequency
distributions for nonessential elements were lognormal distributions.
Although Liebscher and Smith’s justifications for this hypotheses are
flawed, other researchers have reported similar observations.
We measures the concentrations of Cd, Ca, Cr, Co, Cu, Fe, Pb, Mn, Hg, K,
Se, Na, and Zn in the muscle, liver, and egg tissues of female largemouth bass
to determine (1) to what extent the frequency distributions of elemental
concentrations are affected by errors in measuring concentrations and (2)
whether the previously observed differences between essential and nonessential
elements could be demonstrated if we restricted our comparisons to only those
elements whose concentrations can be accurately measured.
Variance component analyses of elemental concentrations in muscle tissue
indicated that variations among replicate tissue samples due to measuring errors
were large relative to the variations among individual fish for Cd, Ca, Mn, K,
and Na. For elements where
variation among individuals was not obscured by errors in measuring
concentrations, there were no apparent differences between the frequency
distributions for the essential elements, Cr, Cu, Fe, Se, and Zn, and the
distributions for the nonessential elements, Pb, and Hg.
The hypothesis of Liebscher and Smith was not supported by our data.
chromium; copper; frequency distributions; iron; kurtosis; largemouth
bass; lead; mercury; Micropterus salmoides; selenium; skewness;
variance components; zinc.
SREL Reprint #0730
Pinder, J.E., III and J.P. Giesy. 1981. Frequency
distributions of the concentrations of essential and nonessential
elements in largemouth bass, Micropterus salmoides. Ecology