Poster Presentation Australian Marine Sciences Association 2025 Conference

Morphometric measurements of the nutritive condition of coastal dolphins in Southeast Queensland, Australia, through the use of drone-based photogrammetry (#111)

Jessica M Buckman 1 , Emily Gregory 1 , Bonnie J Holmes 1 , Alexis L Levengood 1
  1. Univeristy of the Sunshine Coast, Sippy Downs, QUEENSLAND, Australia

Coastal dolphin populations in Southeast Queensland (SEQ) face increasing pressures from anthropogenic activities and climate change, yet no research currently exists on their baseline nutritive health and body condition. This study employs drone-based photogrammetry to assess the morphometric body condition of Australian humpback dolphins (Sousa sahulensis) and Indo-Pacific bottlenose dolphins (Tursiops aduncus), which are classified as vulnerable and near-threatened under IUCN and NCA listings, respectively. Morphometric analyses will be used to determine nutritive condition and correlated with key biological (e.g., age, sex, species, reproductive status), and geographical factors (e.g., proximity to urban areas, river mouths, and marine parks). The research will be conducted across a 300 km stretch north of Moreton Bay Marine Park to the Great Sandy Marine Park, a region where health assessments of these species have not been undertaken. By integrating advanced photogrammetric techniques with spatial and statistical modelling, this project will provide critical baseline data to inform conservation strategies. Understanding the current nutritive health status of SEQ dolphins is essential for predicting the long-term impacts of environmental and anthropogenic stressors, ensuring effective management interventions, and supporting the resilience of these at-risk marine mammal populations.

  1. Christie, A.I, Colefax, A.P & Cagnazzi, D 2021, 'Feasibility of using small UAVs to derive morphometric measurements of Australian snubfin (Orcaella heinsohni) and humpback (Sousa sahulensis) dolphins', Remote Sensing, vol. 14, no. 1, p.21.