Ukrainian scientist still in Russian detention one year on, ambassador tells Antarctic meeting

Concerns over health and charges based on scientific work raised at Hobart conference

By LineZotpaper

Published19 October 2026

Read Time2 min

Sources2 outlets

Ukrainian scientist Leonid Pshenichnov, arrested by Russia in Crimea in 2025 on treason charges for his Antarctic conservation work, remains in detention more than a year later, Ukraine’s ambassador to Australia said on Monday. Speaking at the annual meeting of the Commission for the Conservation of Antarctic Marine Living Resources in Hobart, Vasyl Myroshnychenko raised serious concerns for the 71-year-old’s health and called for his immediate release.

Dr. Pshenichnov, who had represented Ukraine at CCAMLR since 1996, was detained by Russian authorities last September on the eve of an international conservation meeting in Australia. The ambassador stated that the treason charges stem directly from scientific documents submitted by Ukraine to the commission as part of its work on Antarctic conservation measures.

According to an arrest document seen by the ABC, Russia claims the proposed conservation measures would undermine its krill fishing operations and lead to the loss of future oil exploitation opportunities, despite mining being banned under the Antarctic Treaty.

“Thus, actions undertaken within the procedures provided for by the convention are being criminalised,” Myroshnychenko said, according to a transcript of his speech. He also urged CCAMLR members to support the demand for Pshenichnov’s unconditional release and an end to Russia’s war against Ukraine.

At last year’s meeting, Australia expressed grave concerns over the scientist’s arrest.

Analysis

Why This Matters

The detention of a scientist for participating in an international treaty body could undermine cooperation on Antarctic governance.
It highlights growing tensions over Antarctic resource management between Russia and other nations.
The scientist’s deteriorating health adds a humanitarian dimension to the case.

Background

The Antarctic Treaty system promotes scientific cooperation and environmental protection on the continent, while CCAMLR regulates marine living resources. Disputes over fishing rights and conservation measures are common, but the arrest of a delegate for engaging in such work is unprecedented. Leonid Pshenichnov had been a long-standing member of Ukraine’s Antarctic research community.

Key Perspectives

Ukraine: The arrest is a violation of international law and an attack on scientific independence; the ambassador called it a demonstration of Russia’s disregard for universal human values.
Russia (per arrest document): The conservation measures threatened Russian economic interests, including krill fishing and future oil extraction, justifying treason charges.
International community: CCAMLR members and Australia have expressed concern, but no collective action has yet been taken.

What to Watch

Any formal response from Russian authorities.
Health updates on the 71-year-old scientist.
Whether CCAMLR members adopt a resolution or other diplomatic measures.

Sources

Ukrainian scientist still in Russian detention one year on, conference told · Latest Science news
Ukrainian scientist still in Russian detention one year on, conference told · Just In

Checked

11 claims in this story checked against 1 source: 9 supported.

Show each claim

SupportedLeonid Pshenichnov, arrested by Russia in Crimea in 2025 on treason charges, remains in Russian detention more than a year later.Latest Science news: “Ukrainian scientist arrested by Russia on the eve of an international conservation meeting in Australia in 2025 remains in detention one year on, Ukraine's ambassador says.”
Partly supportedUkraine's ambassador to Australia Vasyl Myroshnychenko said this on Monday at the CCAMLR annual meeting in Hobart.Latest Science news: “On Monday, Ukraine ambassador Vasyl Myroshnychenko again raised the plight of the scientist at this year's annual meeting of the Commission for the Conservation for Antarctic Marine Living Resources (CCAMLR) in Hobart.”
SupportedMyroshnychenko raised serious concerns for the 71-year-old's health.Latest Science news: “He is 71 years old, and his state of health is a matter of serious concern.”
SupportedPshenichnov had represented Ukraine at CCAMLR since 1996.Latest Science news: “The ambassador noted Mr Pshenichnov had represented Ukraine at CCAMLR since 1996.”
SupportedHe was detained last September on the eve of an international conservation meeting in Australia.Latest Science news: “Leonid Pshenichnov was detained in Russian-controlled Crimea in September last year after being accused of treason for conducting research that promoted conservation measures in Antarctica.”
SupportedThe ambassador stated the treason charges stem directly from scientific documents submitted by Ukraine to the commission.Latest Science news: “The charges are based on the scientific work that Leonid Pshenichnov carried out as a member of the Ukrainian delegation to CCAMLR, including documents submitted by Ukraine to the Commission.”
SupportedAn arrest document seen by the ABC says Russia claims the proposed conservation measures would undermine krill fishing and future oil exploitation, despite the Antarctic Treaty mining ban.Latest Science news: “An arrest document seen by the ABC said the conservation measures would have undermined Russia's krill fishing operations. It also said the measures would lead to the loss of the opportunity to exploit oil resources in the area, even though mining is banned under the Antarctic Treaty.”
SupportedQuote: 'Thus, actions undertaken within the procedures provided for by the convention are being criminalised.'Latest Science news: “Thus, actions undertaken within the procedures provided for by the Convention are being criminalised by the State, which is a Party to this Convention.”
SupportedMyroshnychenko urged CCAMLR members to support Pshenichnov's unconditional release and an end to Russia's war against Ukraine.Latest Science news: “The ambassador concluded his statement by urging CCAMLR members to support the demand for Mr Pshenichnov's immediate and unconditional release, as well as the end of Russia's war against Ukraine.”
SupportedAt last year's CCAMLR meeting, Australia expressed grave concerns about the scientist's arrest.Latest Science news: “At last year's meeting, Australia expressed its grave concerns about the scientist's arrest.”
Not in the sourcesPshenichnov is referred to as 'Dr.'