Jailed Russian businessman and herpetologist Nikolai Doroshenko is set to be released on bail following an Appeal court ruling on Monday, though criminal charges levelled by his nemesis, fugitive former oligarch Sergei Polonsky, remain.

The Sihanoukville expatriate was jailed on March 25 after failing to appear in court over charges filled by Polosnky, his former business partner, related to one of several land disputes between the pair.

Presiding judge Khun Leang Meng could not be reached on Monday afternoon but both Polonsky's lawyer Benson Samay and Doroshenko's son Ostap confirmed that Nikolai had been granted bail.

“I'm waiting for when my father comes out and then we will speak with the lawyer and then we will make plans [as to] what is the next step,” Ostap Doroshenko said on Monday.

“My father has stayed in the prison one month already so we are going report [Polonsky] back [to police],” he said, adding it was time for Polonsky to go to jail for the false charges he had filed against his father.

Polonsky's lawyer Samay said he was speechless upon hearing the bail decision and warned that Doroshenko holds multiple passports.

“He wanted to flee this country since a long time ago as he has collected money to build a house at Chonburi [province in Thailand] and he also has no money to pay Polonsky back,” he said.

Polonsky is himself wanted in Russia on multimillion dollar embezzlement charges but has thus far escaped extradition. In 2012 Polonsky was jailed for allegedly forcing a group of Cambodians overboard at knife point but later released on bail in a case that has never gone trial.