Document Detail


Reproductive changes in American kestrels (Falco sparverius) in relation to exposure to technical hexabromocyclododecane flame retardant.
MedLine Citation:
PMID:  21898552     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Recently, the ban of hexabromocyclododecane (HBCD), a high production volume flame retardant, was announced in Europe and North America. However, the effects of HCBD remain understudied in birds. The objectives of the present comparative effects study were to determine if exposure to a technical HBCD mixture (HBCD - TM) altered avian reproductive measures at an environmentally relevant concentration (not to determine dose-response or least-observable-effects levels). American kestrels were exposed daily by food to HBCD - TM, i.e., 0.51 µg HBCD/g kestrel/day; exposed kestrels laid eggs that had α-HBCD concentrations (163.5 ± 75.1 ng/g wet wt) ten-fold greater than β- and γ-HBCD isomers - an isomer profile and concentrations similar to eggs of wild peregrine falcons (Falco peregrinus). Concentrations of HBCD were not detected in the control kestrel eggs. In comparison to controls, the kestrels exposed to HBCD began to lay their eggs 6 d earlier, and laid larger clutches of smaller eggs. The size of the eggs was inversely correlated with the in ovo α-HBCD concentrations. The smaller eggs of the HBCD exposed kestrels also lost more weight by mid-incubation, suggesting increased eggshell porosity since eggshell thickness was comparable. Generally birds that lay more eggs and earlier in the breeding season gain the advantage of better hatching and fledging success, yet the kestrels exposed to HBCD failed to have better reproductive success than the control birds. These reproductive changes were a function of HBCD exposure, likely through changes in food consumption with possible impacts on, for example, reproductive behavior and/or alterations in thyroid hormones. Environ. Toxicol. Chem. © 2011 SETAC.
Authors:
Kim J Fernie; Sarah C Marteinson; David M Bird; Ian J Ritchie; Robert J Letcher
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-8-23
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  -     ISSN:  1552-8618     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-9-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 SETAC.
Affiliation:
Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment Canada, Burlington, Ontario. kim.fernie@ec.gc.ca.
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