4.7 Article

Seasonal variation and annual trends of metals and metalloids in the blood of the Little Penguin (Eudyptula minor)

Journal

MARINE POLLUTION BULLETIN
Volume 110, Issue 1, Pages 261-273

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.06.055

Keywords

Seabird; Bioindicator; Mercury; Port Phillip Bay; Bass Strait

Funding

  1. Victoria University
  2. Holsworth Wildlife Research Endowment
  3. Port Phillip EcoCentre
  4. Phillip Island Nature Parks
  5. Birds Australia

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Little Penguins (Eudyptula minor) are high-trophic coastal feeders and are effective indicators of bioavailable pollutants in their foraging zones. Here, we present concentrations of metals and metalloids in blood of 157 Little Penguins, collected over three years and during three distinct seasons (breeding, moulting and non-breeding) at two locations: the urban St Kilda colony and the semi-rural colony at Phillip Island, Victoria, Australia. Penguin metal concentrations were foremostly influenced by location (St Kilda > Phillip Island for non-essential elements) and differed among years and seasons at both locations, reflecting differences in seasonal metal bioaccumulation or seasonal exposure through prey. Mean blood mercury concentrations showed an increasing annual trend and a negative correlation with flipper length at St Kilda. Notably, this study is the first to report on blood metal concentrations during the different stages of moult, showing the mechanism of non-essential metal mobilisation and detoxification. (C) 2016 Elsevier Ltd. All rights reserved.

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