A new study finds an 80-fold increase in the population of loggerhead turtles nesting at three beaches in Boa Vista, Cabo Verde’s third-largest island, over 27 years.Globally, the loggerhead population has decreased by 47% over the past three generations, a decline largely attributed to anthropogenic pressures such as habitat loss, marine pollution, fishing bycatch, poaching and multiple climate change-driven impacts.The authors of this first-of-its-kind study of Cabo Verde’s nesting loggerheads attribute the remarkable local recovery to decades-long conservation efforts.
In 2018, night patrol teams on Boa Vista, the third-largest island in the Cabo Verde archipelago, started noticing a change along the beaches: The loggerhead turtles were arriving in significantly larger numbers than usual.
In previous years, each team, comprised of staff and volunteers from local conservation NGO Cabo Verde Natura 2000 (CVN2), encountered between five and 10 female turtles (Caretta caretta) a night. But now, the teams were each recording between 20 and 30 females a night. By 2021, that number had grown to between 30 and 40.
A recent study published in Biological Conservation confirms the upward trend: An 80-fold increase in the population of loggerheads nesting at three of Boa Vista’s beaches over 27 years, from 1998 to 2024. The authors of this first long-term study of Cabo Verde’s nesting loggerheads ascribe the remarkable trend to decades-long conservation efforts at the local and national level.
