In a disheartening discovery, the elusive Java Stingaree (Urolophus javanicus) has been officially declared extinct, marking the first marine fish extinction attributed to human activity. The somber announcement follows a meticulous assessment led by an international team spearheaded by Charles Darwin University (CDU). The team’s findings were unveiled as part of the International Union for Conservation of Nature’s updated IUCN Red List of Threatened Species, emphasizing the urgency of conservation efforts worldwide. Experts hope the demise of this rare species, documented only once in the late 1800s, signals a critical turning point in marine biodiversity.
A stingaree is a type of ray that belongs to the Urolophidae family. The Java Stingaree was initially identified through a solitary specimen collected in 1862 from a fish market in Jakarta, Indonesia. Since then, it seemingly vanished off the face of the planet. CDU’s recent investigation, utilizing advanced modeling techniques, amalgamated all available data on the species, confirming its extinction. Scientist Julia Constance, a CDU PhD Candidate and the lead assessor, shed light on the multifaceted factors that contributed to the demise of the Java Stingaree: “Intensive and generally unregulated fishing is likely the major threat resulting in the depletion of the Java Stingaree population, with coastal fish catches in the Java Sea already declining by the 1870s. The northern coast of Java, particularly Jakarta Bay where the species was known to occur, is also heavily industrialised, with extensive, long-term habitat loss and degradation. These impacts were severe enough to unfortunately cause the extinction of this species.”
As part of the assessment, the research team scrutinized known threats to the stingaree, such as overfishing and habitat loss, conducting surveys to determine if the species could still be found in fish markets. Yet CDU PhD Candidate Benaya Simeon, who is studying threatened rays in Indonesia, says it has yet to pop up again. “A range of fish landing sites along the northern coast of Java and across Indonesia have been monitored extensively but they have not recorded the Java Stingaree,” Simeon said. “The Java Stingaree was a unique dinner plate-sized ray with no similar species in Java and the fact it has not been found during innumerable surveys confirms its extinction.”
CDU’s Research Institute for the Environment and Livelihoods Senior Research Fellow Dr. Peter Kyne, emphasized the broader implications of this extinction. He believes that with over 120 Critically Endangered marine fishes globally, the loss of the Java Stingaree serves as a pivotal moment for marine biodiversity conservation efforts. “We must think about appropriate management strategies like protecting habitat and reducing overfishing while also securing the livelihoods of people reliant on fish resources,” warned Kyne.
“Extinction is forever,” agrees Constance, urging a collective effort to protect the delicate balance of our oceans. “and unless we can secure populations of threatened marine species worldwide, the Java Stingaree will only be the tip of the iceberg.”