Assessing Satellite Tagging Technology for Hector's and Maui Dolphin Research

Substantial work has been undertaken to assess and address the risk of fisheries bycatch to Hector�s and Maui dolphins through the Threat Management Plan . However, fully understanding the risk is limited by gaps in our knowledge on the fine scale distribution and behaviour of the dolphins. Satellite tagging has been proposed in the past as a tool to fill knowledge gaps.

However, technology at the time required invasive techniques to deploy the tags on dolphins and was considered high risk for use on Hector�s and Maui dolphins. The last time the technology was considered was at the formation of the Maui dolphin Research Advisory Group in 2014. Technology has likely progressed since then.

The purpose of this project is to assess the current state of the technology to see if it has advanced enough to answer questions about Hector�s and Maui dolphin distribution and foraging behaviour while minimising the potential risk of the tag deployment to the dolphins.

This project will start off by investigating available tracking options that would allow for a more comprehensive research project to be undertaken on Hector�s dolphins. This study will assess similar research conducted, both nationally and internationally, to ascertain a fit-for-purpose method(s) for measuring spatial use in small marine mammals.

Options need to be assessed based on set criteria such as longevity, cost-effectiveness, and impact to the animal. This study will also provide recommendations on the effective time-period for the subsequent research project.