Ukrainian Scientist Remains in Russian Detention More Than a Year After Arrest

Ukraine has urged an international Antarctic conservation commission to press for the immediate release of scientist Leonid Pshenichnov, whose health is reportedly a serious concern

A Ukrainian scientist has remained in Russian detention for more than a year, prompting renewed calls for his release at an international conservation meeting in Hobart, Tasmania. Leonid Pshenichnov was detained in Russian-controlled Crimea in September 2025, shortly before an annual meeting of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). Ukraine's ambassador to Australia, Vasyl Myroshnychenko, raised the case again at the commission's meeting on Monday, 19 October 2026. Pshenichnov, 71, has represented Ukraine at the commission since 1996. The organisation works on conserving marine life in the Southern Ocean, including managing fishing activities and protecting Antarctic ecosystems. Russian authorities reportedly accused Pshenichnov of treason, alleging that his research supported conservation measures that could affect Russian krill fishing operations. An arrest document reviewed by the ABC also reportedly linked the measures to restrictions on the exploitation of oil resources in Antarctica, where mineral resource activities are prohibited under the Antarctic Treaty framework. These are reported allegations, not independently established findings. Speaking at the meeting in Hobart, Ukraine's ambassador said there were serious concerns about the scientist's health and called on commission members to support his immediate and unconditional release. Ukraine argues that the case criminalises scientific work undertaken as part of its official participation in an international conservation process. The case has raised wider concerns about the risks researchers may face when scientific work intersects with geopolitical disputes. International scientific bodies often depend on cooperation between countries, even when those countries have serious political disagreements. The detention has therefore become an issue extending beyond the individual scientist to questions about scientific independence, international cooperation and the treatment of researchers. Australia expressed grave concern about Pshenichnov's arrest at the commission's meeting in 2025. The ABC reported that it had contacted the Russian Embassy for comment. As the annual meeting continues, Ukraine is seeking support from participating countries to secure Pshenichnov's release. The outcome of those discussions, and any response from Russian authorities, remain uncertain.