Divya Panicker

THT Action Grant 2024

Project Name:

Surveying endangered Blue Whales in the Lakshadweep archipelago

Project Brief:

Blue Whales, once heavily targeted by commercial whaling from the late 19th to mid-20th century, saw their population plummet to a mere 1-2% of pre-whaling numbers. Globally listed as Endangered, the population of Blue Whales in the Northern Indian Ocean (NIO) is still considered Data Deficient by the IUCN, largely due to unclear whaling impacts and the absence of population estimates for the region. Most data in the Indian Ocean comes from passive acoustic monitoring in the southern hemisphere, leaving gaps in understanding their range and distribution in the NIO and Arabian Sea.

The NIO region faces significant environmental threats, including the effects of climate change, rising ocean temperatures, more frequent marine heatwaves, and cyclones. Additionally, human activities such as shipping, fishing, and military operations contribute to the risks faced by these marine giants. Despite these challenges, the lack of comprehensive data on their distribution and movement patterns hinders effective conservation strategies.

Divya’s proposal aims to bridge this knowledge gap by conducting a multi-year passive acoustic monitoring (PAM) project in the Lakshadweep archipelago. This initiative seeks to track and record blue whale vocalisations, determine their seasonal presence, and gain a better understanding of their movements. By gathering and analysing this acoustic data, the project will help identify key areas of Blue Whale activity and the threats they face. The findings will be shared with local authorities and conservation agencies to inform management and protection strategies for the species, ultimately supporting efforts to safeguard blue whales in the region. This project will not only contribute to the scientific understanding of this endangered species but also promote better conservation practices and policies, ensuring the long-term survival of Blue Whales in the northern Indian Ocean.

Project objectives:
  • To understand the acoustic occurrence of Blue Whales in the Lakshadweep archipelago by monitoring their vocalisations using passive acoustic monitoring (PAM) technology.
  • To determine the seasonality of Blue Whales in the Lakshadweep archipelago by identifying patterns in their vocalisations over time.
  • To disseminate findings on Blue Whale presence and behaviour to local authorities and develop a comprehensive management plan to ensure effective conservation and protection of the species in the region.
Highlights from the field:
  • This project is ongoing