Sharks found to produce cortisol, challenging long-held assumption
A new study reports that sharks do produce cortisol, overturning a belief that has lasted about 60 years. The discovery reshapes how scientists view stress responses in sharks.
For about 60 years, a belief held that sharks do not produce cortisol. The new study reports that they do, overturning that assumption. The summary says this discovery changes how scientists view stress responses in sharks. The finding belongs to the broader fields of biology and genetics, where established ideas can be reconsidered when new evidence emerges. The available material does not provide details about methods, species, or what the result means for shark health or ecosystems.
Scientists who study sharks may need to revisit assumptions about stress physiology. That could influence how research is designed and how findings are communicated. People involved in shark conservation, fisheries, or public education might also encounter revised explanations of shark biology. Any broader societal effects would likely depend on follow-up work and how the finding is applied; the available summary does not specify direct consequences.