Breakthrough for Indonesian scientists studying migration paths of pygmy blue whales

Indonesian researchers have achieved a significant breakthrough in marine mammal tracking, successfully deploying a satellite tag on a pygmy blue whale using a drone. The achievement, which took nine attempts, marks a shift towards less invasive research methods for this endangered species.

A New Approach to Whale Tracking

For years, scientists have relied on conventional airgun-based tagging methods to study pygmy blue whale migration. This process requires close proximity to the whales and can cause them stress and even tissue damage. The new drone-based technique, utilizing a Low Impact Minimally Percutaneous Electronic Transmitter (LIMPET) tag, allows researchers to deploy tags safely from a distance.

Did You Know? The cost of a single LIMPET tag is approximately US$5,000 (S$6,330).

Mr. Mochamad Iqbal Herwata, focal species conservation senior manager at Konservasi Indonesia, explained that the drone deployment, conducted in October 2025 off the coast of Kupang, Indonesia, was a major step forward. The team celebrated when the tag successfully attached to the whale’s back from a distance of around 300 meters.

Unveiling Migration Patterns

The tagged whale traveled approximately 2,000 kilometers over ten days before the tag stopped transmitting data. This initial data provides a glimpse into the complex migration routes of pygmy blue whales, revealing movements across national borders from Indonesia through Timor-Leste and beyond. Researchers are beginning to understand the full scope of these whales’ journeys.

Expert Insight: The ability to track whale movements with minimal disturbance is crucial for developing effective conservation strategies. Understanding migration patterns allows for targeted protection efforts, such as establishing marine protected areas and mitigating risks like ship collisions.

The expedition, led by Konservasi Indonesia, involved collaboration with researchers from Timor-Leste, the Centre for Whale Research (Western Australia), and Thrive Conservation. Future plans include tagging more whales to build a more comprehensive picture of their migration patterns.

Broader Implications for Conservation

The Lesser Sunda Seascape, encompassing the islands of Indonesia and Timor-Leste, is a vital migration corridor for these whales. Data gathered from these tags can inform the creation of Marine Protected Areas (MPAs) and contribute to community-based ecotourism development in Timor-Leste, Alor, and Wetar.

Indonesia has already taken action, establishing the West Wetar MPA in December 2025 along a key whale migration pathway. Understanding where whales feed is also critical, as these areas are essential for their survival and can also benefit local fish stocks.

Frequently Asked Questions

What type of tag was used in this research?

A Low Impact Minimally Percutaneous Electronic Transmitter (LIMPET) tag was used, a type of satellite tag that can remain attached to marine mammals for several months.

Where did this research take place?

The initial successful drone-based tagging occurred off the coast of Kupang, Indonesia, in October 2025.

What is the significance of the Lesser Sunda Seascape?

The Lesser Sunda Seascape is one of the world’s most important whale migration corridors, surrounding the Lesser Sunda Islands of Indonesia and Timor-Leste.

As researchers continue to track these magnificent creatures, what further insights might be gained about their behavior and the challenges they face in a changing ocean environment?