[MARMAM] New Publication - Correlations among mercury concentrations in different tissues of northern elephant seals

Sarah Peterson sarahpeterson23 at gmail.com
Mon Aug 8 07:08:04 PDT 2016


Dear Colleagues,

We are pleased to announce the recent publication of the following article:

Peterson, S.H., J.T. Ackerman, D.P. Costa. (2016). Mercury correlations
among blood, muscle, and hair of northern elephant seals during the
breeding and molting fasts. Environmental Toxicology and Chemistry 35(8):
2103-2110.

*Abstract:* Mercury (Hg) biomonitoring and toxicological risk assessments
for marine mammals commonly sample different tissues, making comparisons
with toxicity benchmarks and among species and regions difficult. Few
studies have examined how life-history events, such as fasting, influence
the relationship between total Hg (THg) concentrations in different
tissues. The authors evaluated the relationships between THg concentrations
in blood, muscle, and hair of female and male northern elephant seals
(*Mirounga
angustirostris*) at the start and end of the breeding and molting fasts.
The relationships between tissues varied among tissue pairs and differed by
sampling period and sex. Blood and muscle were generally related at all
time periods; however, hair, an inert tissue, did not strongly represent
the metabolically active tissues (blood and muscle) at all times of year.
The strongest relationships between THg concentrations in hair and those in
blood or muscle were observed during periods of active hair growth (end of
the molting period) or during time periods when internal body conditions
were similar to those when the hair was grown (end of the breeding fast).
The results indicate that THg concentrations in blood or muscle can be
translated to the other tissue type using the equations developed but that
THg concentrations in hair were generally a poor index of internal THg
concentrations except during the end of fasting periods.

Please contact me if you do not have access to this article and would like
a pdf (sepeterson at ucsc.edu).

Best regards,

Sarah Peterson

-- 
Sarah Peterson, PhD
Wildlife Biologist
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