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Contaminant assessment of stranded and deceased beaked whales (Ziphiidae) on the New South Wales coast of Australia
Journal article   Open access   Peer reviewed

Contaminant assessment of stranded and deceased beaked whales (Ziphiidae) on the New South Wales coast of Australia

Natalie Palmer, Amanda Reichelt-Brushett, Jane Hall, Daniele Cagnazzi, Karrie Rose and Duane March
Marine pollution bulletin, Vol.204, 116520
07/2024
DOI: https://doi.org/10.1016/j.marpolbul.2024.116520
PMID: 38815472
Appears in  Recent Faculty of Science and Engineering Publications
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Published (Version of record)CC BY V4.0,  Open Access
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Published (Version of record)CC BY V4.0,  Open

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Abstract

Beaked whale Cadmium PCBs Whale POPs Metal Mercury
Metal and organic pollutants are prominent marine contaminants that disperse widely throughout the environment. Some contaminants biomagnify, leaving long-lived apex predators such as cetaceans at risk of toxicity. Various tissues collected post-mortem from 16 Ziphiidae individuals that stranded on the New South Wales (NSW) coast, Australia, over ∼15 years were investigated for 16 metals/metalloids and 33 organic contaminants. Polychlorinated biphenyls (PCBs) and Dichlorodiphenyltrichloroethanes (DDTs) were commonly detected in blubber and liver tissues. Mercury, cadmium and silver exceeded reported toxicity thresholds in several individuals. The liver tissue of a Mesoplodon layardii specimen had the highest mercury (386 mg/kg dry weight). Liver tissue of a Mesoplodon grayi specimen had the highest silver concentration (19.7 mg/kg dry weight), and the highest cadmium concentration was in Ziphius cavirostris kidney (478 mg/kg dry weight). This study provides important new information for rare Ziphiidae species globally.

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