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Selenium accumulation in captive american kestrels ( Falco sparverius ) fed selenomethionine and naturally incorporated selenium
Author(s) -
Yamamoto Julie T.,
Santolo Gary M.,
Wilson Barry W.
Publication year - 1998
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620171216
Subject(s) - selenium , methionine , zoology , body weight , biology , toxicity , dry weight , chemistry , medicine , endocrinology , biochemistry , botany , organic chemistry , amino acid
Male–female pairs of kestrels were maintained for 11 weeks on diets containing 5 or 9 ppm selenium (Se) (dry weight) as seleno‐L‐methionine, or naturally incorporated Se in the form of mammals collected at Kesterson Reservoir, CA, USA. Selenium concentrations in blood and excreta of male and female kestrels within groups were similar. Near‐maximal mean Se concentrations in blood were observed after the 5th week of treatment in the seleno‐L‐methionine‐treated kestrels, and an approximately 1:1 ratio was observed between maximal blood concentrations and dietary concentrations. All treatment groups exhibited reduction of Se concentration in excreta, but not in blood, to baseline values 4 weeks after treatment ended. No birds were observed to exhibit signs of general illness or Se toxicity during the study.