In this episode, we will hear from Clare Andvik, a PhD researcher based at the University of Oslo in Norway, working with the Norwegian Orca Survey. Her research focuses on pollutants accumulating in killer whales, particularly how what they eat shapes their toxic load. During her master’s thesis, Clare and her coauthors showed that orcas that eat seals, in addition to fish, have much higher levels of toxic pollutants like PCBs and mercury, meaning they are more at risk of health effects.
During her PhD, she is now looking at what the effect of this pollution is on the health of killer whales, and how it interacts with other human-made stressors like whale watching and climate change. In this episode we’ll dive into her work that combines the fields of biology, toxicology, and feeding ecology, all while braving the icy conditions of Norway’s northern fjords to get data from live whales.
Synopsis
Clare’s initial work involved photo ID, a technique that distinguishes individual orcas by their unique fin markings. This method provides invaluable insights into their social structures, movements, and even dietary habits.
Transition to Pollution Studies:
Clare’s career took a significant turn as she delved into the study of pollutants in orcas. Her research revealed that seal-eating orcas had higher levels of contaminants, emphasizing the impact of diet on pollutant accumulation and the urgent need for regulatory measures.
The Multi-Well Project:
Currently, Clare is involved in the Multi-Well Project, which investigates the combined effects of pollution, whale watching, and prey availability on orcas. By examining stress hormones and nutritional stress, the project seeks to understand the intricate interactions affecting orca health.
Fieldwork Challenges and Successes:
Fieldwork is not without its challenges, from equipment failures to adverse weather. However, the resilience and teamwork of Clare’s research group have led to significant achievements, such as collecting crucial samples during the COVID-19 pandemic when human activity was reduced.
Conclusion:
Clare’s journey is a testament to the power of perseverance and collaboration in scientific research. Her work not only enhances our understanding of orcas but also informs policy changes to protect marine life. As Clare continues to explore the complexities of orca ecology, her story inspires future scientists to pursue their passions and make a difference.
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Cover Photo by Norwegian Orca Survey