AI Insight
Researchers from the University of Chester and partners in the Philippines used a remote stereo camera system to assess the vulnerability of pelagic thresher sharks in the Central Visayan Sea. Their findings indicate that this population would be at risk from a fishing mortality rate as low as 5.3% per year. Critically, the removal of just 15 to 18 females from the population could trigger a potentially catastrophic population decline, underscoring the species' limited resilience to fishing pressure.
Why it matters
Pelagic thresher sharks are a high-value species facing ongoing fishing pressure, and these findings provide concrete numerical thresholds that could directly inform fisheries management policies and conservation regulations in the Philippines and beyond.
Understand the Science
The vulnerability of a shark population to losing even small numbers to fishing has been highlighted by researchers from the University of Chester and partners in the Philippines using a remote stereo camera system. The team has found that pelagic thresher sharks in the Central Visayan Sea would be vulnerable to a fishing mortality rate of 5.3% each year, and that the removal of 15 to 18 females would result in a potentially catastrophic decline in the population.