Concentration Dynamics of Polychlorinated Biphenyls and Organochlorine Pesticides in Blood of Growing Grey Heron (Ardea Cinerea) Chicks in the Wild
Organochlorine contaminants (OC) – organochlorine pesticides (OCP) and industrial products and byproducts – are included in different monitoring programmes and surveys, involving various animal species. Fish-eating birds are suitable indicator species for OC. Adult birds may be difficult to capture, but chicks can be sampled more easily. Blood of birds is a potentially suitable non-destructive matrix for analysis, as OC levels in blood reflect their concentrations in the body. The study was aimed at investigating how age of fast-growing Grey heron ( Ardea cinerea ) chicks affects contaminant levels in their blood and thus how important is sampling at exact age for biomonitoring purposes. In 1999 on Lake Engure in Latvia whole blood samples of heron chicks were collected at three different time points, with seven and nine days in between the first and second and second and third sampling points, respectively. Twenty-two chicks were sampled at all three times. In total, 102 samples were analysed for 19 polychlorinated biphenyl (PCB) congeners, DDT metabolites – DDE and DDD, hexachlorobenzene (HCB), α-, β-, γ-hexachlorocyclohexane (HCH), and trans -nonachlor. Total PCB concentrations averaged around 2000 ng/g dry extracted matter (EM). DDE was the dominant individual contaminant (ca. 700 ng/g EM), followed by CB-153, -138, and -118. All other analysed OC were below 100 ng/g EM. With a few minor exceptions no significant (p > 0.05) difference in OC concentrations was found between the three sampling occasions. This means that the blood can safely be sampled for biomonitoring purposes during at least 17 days wide time window. The analysed legacy contaminants may serve as model substances for other persistent organic pollutants
Year of publication: |
[2022]
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Authors: | Valters, Karlis ; Olsson, Anders ; Viksne, Janis ; Rubene, Liga ; Bergman, Ake |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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