Tuvalu has announced former attorney-general and fisheries official Feleti Teo as its new prime minister after he was elected unopposed in the Pacific Islands nation.

Former prime minister Kausea Natano lost his seat in a general election on Jan. 26 closely watched by Taiwan, China, the US and Australia, amid a geopolitical tussle for influence in the South Pacific.

Tuvalu, with a population of about 11,200 spread across nine islands, is one of three remaining Pacific allies of Taiwan, after Nauru cut ties last month and switched to Beijing, which had promised more development help.

Teo received unanimous support from the 16 MPs, officials told Reuters on Monday. Teo, who was educated in New Zealand and Australia, was Tuvalu's first attorney-general and has decades of experience as a senior official in the fisheries industry - the region's biggest revenue earner.

"Feleti Teo was declared by the governor-general as prime minister for Tuvalu," Tuvalu election official, Tufoua Panapa, said in an emailed statement.

Tuvalu MP Simon Kofe congratulated Teo in a social media post.

"It is the first time in our history that a prime minister has been nominated unopposed," he said.

Only one nomination had been sent to the Governor General, before the formal vote by MPs on Monday morning.

The election result in Tuvalu had been delayed by three weeks as dangerous weather stopped boats from bringing new MPs to the capital to vote for prime minister, highlighting why climate change is the top political issue in the Pacific Island nation.

Taiwan previously said it was paying close attention to the election after Tuvalu's finance minister in the previous government, Seve Paeniu, said the issue of diplomatic recognition of Taiwan or China should be debated by the new government.

There had also been calls by some MPs to review a wide-ranging deal signed with Australia in November, that allows Canberra to vet Tuvalu's police, port and telecommunication co-operation with other nations, in return for a defence guarantee and allowing citizens threatened by rising seas to migrate.

The deal was seen as an effort to curb China's rising influence as an infrastructure provider in the Pacific Islands.

There had also been calls by some MPs to review a wide-ranging deal signed with Australia in November, that allows Canberra to vet Tuvalu's police, port and telecommunication co-operation with other nations, in return for a defence guarantee and allowing citizens threatened by rising seas to migrate.

Tuvalu's ministry is also expected to be decided on Monday.

Australian Associated Press