PICRC and DCLE Resume Collaborative Survey of Sea Cucumbers and Sea Urchins in Koror

The Palau International Coral Reef Center (PICRC), in partnership with the Department of Conservation & Law Enforcement (DCLE) of Koror State Government, has resumed its collaborative survey of sea cucumber and sea urchin populations in Btil a Uel and Butelchades. This effort is part of the Resilient Reef Initiative (RRI) and focuses on areas traditionally fished by the local community, as identified by local elders.
The primary goal of this ongoing collaboration is to assess the presence and health of four edible sea cucumber species — Hairy greyfish (Cheremrum), Stonefish (Ngellau), Surf redfish (Badelchelid), and Sandfish (Molech) — and one specific edible sea urchin species, the Collector urchin (Ibuchel), within these historically important fishing grounds.

While initial surveys conducted in 2023 indicated robust habitat conditions suitable for these marine species, the results were concerning: no sea urchins were found in Butelchades, and only one sea cucumber was observed in Btil a Uel.

To address this challenge, researchers are implementing a revised survey approach in 2025, merging traditional knowledge with an extensive literature review. This includes incorporating insights such as basing surveys on moon phases, deploying shading tables to attract sea urchins and provide shelter to get a better sense of their population, and conducting more frequent visits to the areas, both day and night. These adapted methodologies aim to provide a more comprehensive understanding of the current status of these vital marine resources.

Beyond the surveys, a key component of RRI is capacity building. Koror State rangers are joining PICRC researchers in the field, learning firsthand how to conduct surveys, collect data, and apply scientific monitoring techniques. Through this hands-on training, rangers are gaining the skills and experience needed to continue monitoring these marine resources independently in the future, ensuring the long-term sustainability of conservation efforts in Koror.
For more information regarding this project, contact Ms. Greta Sartori and Mr. Vitor Bruno at (680) 488-6952 Ext. 243/239.