A close up of a leopard seal.

Tabular icebergs in the Southern Ocean, South Shetland Islands.

An iceberg in pack ice, Southern Ocean, South Shetland Islands.

A leopard seal and Antarctic fur seal.

Pink ice, South Shetland Islands.

Pancake ice, South Shetland Islands.

Petrels fly above the icy landscape, South Shetland Islands.

Tabular iceberg, South Shetland Islands.

Ice formation, South Shetland Islands.

A close up of a penguin's feathers.

Ice formation, South Shetland Islands.

A closeup of a penguin's feet.

Adelie penguins, South Shetland Islands.

Seals resting on an ice floe, South Shetland Islands.

Weddell seal, South Shetland Islands.

Two south polar brown skuas fight over the remains of an Antarctic finfish.

Weddell seal, South Shetland Islands.

The AMLR science team on the stern of the R/V Yuzhmorgeologiya.

Southern elephant seal resting on a beach at Seal Island, South Shetland Islands .

Southern elephant seal resting on a beach at Seal Island, South Shetland Islands .

Bringing supplies overland to the Cape Shirreff field camp on Livingston Island, South Shetland Islands.

Building the field station at Cape Shirreff, Livingston Island.

Building the field station at Cape Shirreff, Livingston Island.

Building the field station at Cape Shirreff, Livingston Island.

An AMLR scientist stands in front of the food storage building.

AMLR scientists build the Cape Shirreff field camp.

Whale bones are scattered on the beaches around Cape Shirreff field station. AMLR scientists have also found harpoons from whalers on these beaches.

Antarctic scientist, Tony Amos, analysing data aboard the R/V Yuzhmorgeologiya.

In its first years, the Cape Shirreff field station was little more than temporary huts.

An AMLR scientist with a large whalebone.

Chinstrap penguins at the Cape Shireff field camp construction site, Livingston Island.

Chinstrap penguins at Cape Shireff, Livingston Island.

Antarctic fur seals with whalebones at Cape Shirreff, Livingston Island.

Landing at Seal Island.

Stove at the Seal Island field station.

Two south polar brown skuas fight over the remains of an Antarctic finfish.

A field station at South Georgia Island.

Glacier, South Shetland Islands.

A resting crabeater seal pup.

Snow covered mountain, South Shetland Islands.

Glacier, South Shetland Islands.

A close up of a leopard seal.

Snow covered mountain, South Shetland Islands.

Volcanic island, South Shetland Islands.

Glacier, South Shetland Islands.

Glacier, South Shetland Islands.

An Antarctic fur seal pup, Livingston Island.

Snowy landscape, South Shetland Islands.

Ian Hampton aboard the South African R/V Africana in 1990. After the US AMLR field season Roger Hewitt spent another two months at sea aboard the R/V AFRICANA and how they used acoustics to assess krill. The cruise went from Cape Town to Punta Arenas via the South Orkney and South Shetland archipelagos.

Side-scan sonar aboard the R/V Africana.