PubAg

Main content area

Persistent organic pollutants and porphyrins biomarkers in penguin faeces from Kopaitic Island and Antarctic Peninsula

Author:
Rudolph, Ignacio, Chiang, Gustavo, Galbán-Malagón, Cristóbal, Mendoza, Rafael, Martinez, Miguel, Gonzalez, Carlos, Becerra, José, Servos, Mark R., Munkittrick, Kelly R., Barra, Ricardo
Source:
The Science of the total environment 2016 v.573 pp. 1390-1396
ISSN:
0048-9697
Subject:
Pygoscelis adeliae, biomarkers, diet, feces, foraging, metabolites, molecular weight, nitrogen, penguins, persistent organic pollutants, polychlorinated biphenyls, porphyrins, stable isotopes, viability, volatile compounds, Antarctic region
Abstract:
Polychlorinated biphenyl (PCB) levels were determined in the faeces of three Antarctic Peninsula penguin species to assess viability as a non-invasive approach for sampling PCBs in Antarctic biota. These determinations were complemented with stable isotope and porphyrins assessments, and together this methodology determined the role of diet and metabolic disruption in penguins. Up to 60% of the collected faecal samples evidenced low molecular weight PCBs, of which, the more volatile compounds were predominant, in agreement with previous results. The highest PCB levels were reported in the gentoo penguin (Pygoscelis papua; 35.3ngg−1 wet weight average), followed by the chinstrap (Pygoscelis antarctica; 6.4ngg−1 wet weight average) and Adélie penguins (Pygoscelis adeliae; 12.9ngg−1 wet weight average). Stable isotope analyses (δ15N and δ13C) demonstrated that gentoo feeding and foraging habits differed from those of Adélie and chinstrap penguins. A strong positive correlation was found between PCB concentrations and δ15N, indicating the role of diet on the observed pollutant levels. Porphyrins metabolite levels were also directly correlated with PCB concentrations. These results suggest that PCB levels impair the health of Antarctic penguins.
Agid:
5317381