Assessing variation in assemblages of large marine fauna off ocean beaches using drones

Brendan P. Kelaher, Andrew P. Colefax, Alejandro Tagliafico, Melanie J. Bishop, Anna Giles, Paul A. Butcher

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The turbulent waters off ocean beaches provide habitat for large marine fauna, including dolphins, sharks, rays, turtles and game fish. Although, historically, these assemblages have proven difficult to quantify, we used a new drone-based approach to assess spatial and temporal variation in assemblages of large marine fauna off four exposed beaches in New South Wales, Australia. In total, 4388 individual large marine animals were identified from 216 drone flights. The most common taxa, bottlenose dolphins (Tursiops spp.) and Australian cownose rays (Rhinoptera neglecta), occurred in 25.5 and 19.9% of flights respectively. White (Carcharodon carcharias), bull (Carcharhinus leucas) and other whaler (Carcharhinus spp.) sharks were observed in <1% of flights. There was significant variation in the structure of assemblages of large fauna among beaches, with those adjacent to riverine estuaries having greater richness and abundance of wildlife. Overall, drone surveys were successful in documenting the spatio-temporal dynamics of an impressive suite of large marine fauna. We contend that emerging drone technology can make a valuable contribution to the ecological information required to ensure the long-term sustainability of sandy-beach ecosystems and associated marine wildlife.

LanguageEnglish
JournalMarine and Freshwater Research
Early online date22 Jan 2019
DOIs
Publication statusE-pub ahead of print - 22 Jan 2019

Fingerprint

drones (insects)
beaches
beach
oceans
fauna
Carcharhinus
flight
ocean
dolphin
shark
sharks
Rhinoptera
wildlife
Rhinoptera bonasus
Carcharodon carcharias
Leucas
Tursiops
game fish
Tursiops truncatus
dolphins

Keywords

  • Carcharodon
  • dolphin
  • RPAS
  • ray
  • sandy-beach
  • shark
  • Tursiops
  • turtle
  • UAV
  • UAS

Cite this

Kelaher, Brendan P. ; Colefax, Andrew P. ; Tagliafico, Alejandro ; Bishop, Melanie J. ; Giles, Anna ; Butcher, Paul A. / Assessing variation in assemblages of large marine fauna off ocean beaches using drones. In: Marine and Freshwater Research. 2019.
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Assessing variation in assemblages of large marine fauna off ocean beaches using drones. / Kelaher, Brendan P.; Colefax, Andrew P.; Tagliafico, Alejandro; Bishop, Melanie J.; Giles, Anna; Butcher, Paul A.

In: Marine and Freshwater Research, 22.01.2019.

Research output: Contribution to journalArticleResearchpeer-review

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