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Cutting-edge tracking technology proves Australian whale shark tourism leads the world

Cutting-edge tracking technology proves Australian whale shark tourism leads the world
Credit: Jess Leask, ECOCEAN

Using technology akin to a "fitbit" for sharks, a team of researchers has tagged and tracked whale sharks to study the effects of tourism at Ningaloo Reef in Western Australia for the first time. In a resounding endorsement of local tourism practices, the research found the activity of boats and divers has minimal impacts.

While the research found evidence of some increases in and directional changes by the when tourists were swimming with them, experts say each shark's exposure was very limited.

It's an important endorsement of Australian whale shark tourism operators in what is an estimated US$1.9 billion global industry that attracts more than 25 million people each year at 46 sites in 23 countries.

Australia has what is considered the "gold standard" in global whale shark tourism at Ningaloo Reef in Western Australia's Pilbara region.

The research, published in the Journal of Sustainable Tourism, involved physically tagging with biotelemetry devices—animal-borne, that record data—for the first time, rather than relying on observations.

"We used biotelemetry to look at whale sharks' movement and behavior in the presence or absence of tourists," Dr. Brad Norman, research fellow at Murdoch University's Harry Butler Institute and director of marine research not-for-profit ECOCEAN, said.

"We found that tourism encounters lasted for just over an hour and swimming with tourists increased the activity levels of larger sharks—those over seven meters—but not smaller sharks."

"However, we know from photo-identification records, that most sharks are only seen on three or fewer days per year at Ningaloo, so each individual's exposure to tourism is really limited."

Dr. Samantha Reynolds, who led the study into whale shark behavior as part of her Ph.D. at The University of Queensland, tags a whale shark with a biotelemetry device—an animal-borne, electronic device that records data. Credit: Murdoch University

Dr. Samantha Reynolds, who led the study as part of her Ph.D. at The University of Queensland, said that exposure presented only a small fraction of each shark's day.

"Given they only spent an average of 62 minutes swimming with tourists, that's about 4% of their whole day, so any increases in energy it requires would be a relatively small proportion of their daily energetic costs," Dr. Reynolds said.

"This is really important data for both the animals and the industry—and would not have been apparent from purely observational studies.

"It's also a lesson in management for the wider wildlife tourism industry."

"Although interactions with humans like these are likely to impact wildlife to some degree, if well-managed like the Ningaloo whale shark tourism industry, wildlife tourism can be sustainable for the operators and tourists, and for the animals as well."

The research team does state this is not always the case, particularly in the case of whale sharks. The methods for interacting with them and the levels of regulation controlling them vary widely.

"Some countries have very little regulation on whale shark tourism, there is overcrowding and in some places the sharks are fed to attract and keep them in areas where can swim with them," Dr. Norman said.

"This makes it really important—and presents a huge opportunity—for the global industry to see what we're doing at Ningaloo and learn from it."

More information: Samantha D. Reynolds et al, Swimming with humans: biotelemetry reveals effects of "gold standard" regulated tourism on whale sharks, Journal of Sustainable Tourism (2024). DOI: 10.1080/09669582.2024.2314624

Provided by Murdoch University

Citation: Cutting-edge tracking technology proves Australian whale shark tourism leads the world (2024, February 29) retrieved 14 April 2024 from https://phys.org/news/2024-02-edge-tracking-technology-australian-whale.html
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