Use of drones for recreational fishing threatens species and causes conflict
Anglers contravening SA Marine Living Resources Act
“Drone fishing” is a relatively recent innovation in the use of unmanned aerial vehicles. Some recreational anglers are using personal drones to fly baited lines into hard-toreach areas of water, or to look for good fishing areas.
Recreational fishing is a popular sport and hobby in SA, which has a 2,850km shoreline.
The most recent estimate of the number of marine shore based anglers is about 400,000.
The group of researchers I’m part of, who study linefish (fish caught using hook and line) became aware over the past 10 years or so of the increased practice of drone fishing. This was in part thanks to recreational fishers approaching us with their concerns.
One of the concerns is that increases in the numbers of enthusiastic anglers and their ability to catch fish might have significant effects on fish stocks and other animals (such as birds) in coastal zones. Another is that drone fishing might intensify conflict between fisher groups competing for the same species.
Aside from recreation, linefishing provides the primary source of protein and income for about 2,730 commercial fishers, 2,400 small-scale boat fishers and 30,000 small-scale shore-based fishers in SA.
We agreed the practice should be investigated, but faced a challenge: there was little monitoring going on to provide data.
So we took an unconventional approach to our study.
We used publicly available online monitoring to estimate the growing interest, global extent and catch composition of drone fishing.
This showed us that there had been a big (357%) spike in interest in drone fishing in 2016. There were also worrying indications of a threat to species of conservation concern in SA.
We then consulted commercial
drone operators, legal researchers and others to get a more holistic view.
Drone fishing has economic, political, legal, ecological and physiological implications. Based on this we made some recommendations for further research and monitoring, and shared them with fishing authorities.
The SA department of forestry,
fisheries & the environment then released a public notice warning recreational anglers that the use of drones and other electronic devices is deemed illegal under the SA Marine Living Resources Act.
The fishing drone companies that had already emerged are now struggling to survive. They have taken the department to court, seeking clarity on the legality of using drones in fishing. The judgment on this case, which is currently in the appeal court, will no doubt pave the way for how drone fishing is managed in SA in the future.
Largely because we were housebound during the 2020-2021 COVID19 pandemic, we gathered most of our data via the internet. We surveyed social media platforms for dronefishing dedicated groups and used Google Trends to track internet searches for “drone fishing”.
Results indicated a 357% spike in interest in 2016, after the release of a popular YouTube video of an angler catching a large longfin tuna from an Australian beach using a drone.
The search volume increased to about 3,600 monthly searches from an average of about 1,400 before the peak.
“Drone fishing” Facebook groups had more than 17,000 members and 38,700 videos with titles including the term “drone fishing” had been uploaded. The online interest was mostly in three countries: New Zealand, SA and Australia.
To get an idea of which fish species were targeted, we then watched 100 YouTube videos posted by drone fishers in those three countries. In both New Zealand and Australia, the most frequently observed catch was red snapper, which is not a species of direct conservation concern. In SA, though, sharks made up the majority (97%) of viewed catches, many of which are of severe conservation concern, such as the dusky shark.