Endocrine effects of the herbicide linuron on the American Goldfinch (Carduelis tristis)

Karen M. Sughrue, Margaret Brittingham-Brant, John B. French

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Certain contaminants alter normal physiological function, morphology, and behavior of exposed organisms through an endocrine mechanism. We evaluated how the herbicide linuron, an endocrine-active compound, affects physiological parameters and secondary sex characteristics of the American Goldfinch (Carduelis tristis). When administered at relatively low doses (control, 1.0, 4.0, and 16.0 μg linuron per gram of body mass per day), linuron delayed prealternate molt progression in a dose-dependent manner. At the high dose level, linuron exposure lowered hematocrit and female plasma thyroxine concentrations and increased body mass. Neither plasma testosterone concentrations nor the color of plumage or integument of birds in the treatment groups were different from those of the control group. Overall, the physiological effects that were measured suggested disruption of thyroid function. These results highlight the importance of continual monitoring of avian populations for potential effects of exposure to pesticides and other chemicals at sublethal concentrations.

Original languageEnglish (US)
Pages (from-to)411-419
Number of pages9
JournalAuk
Volume125
Issue number2
DOIs
StatePublished - Jan 1 2008

Fingerprint

linuron
Carduelis
herbicide
herbicides
body mass
dosage
plasma
thyroid function
plumage
testosterone
molt
thyroxine
integument
hematocrit
molting
pesticides
pesticide
bird
effect
pollutant

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Sughrue, Karen M. ; Brittingham-Brant, Margaret ; French, John B. / Endocrine effects of the herbicide linuron on the American Goldfinch (Carduelis tristis). In: Auk. 2008 ; Vol. 125, No. 2. pp. 411-419.
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Endocrine effects of the herbicide linuron on the American Goldfinch (Carduelis tristis). / Sughrue, Karen M.; Brittingham-Brant, Margaret; French, John B.

In: Auk, Vol. 125, No. 2, 01.01.2008, p. 411-419.

Research output: Contribution to journalArticle

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