A leopard seal hunting in the Antarctic (Credit James Robbins)

A leopard seal hunting in the Antarctic (Credit James Robbins)

Drone footage has shown never-before seen behaviour of two leopard seals sharing food.

Despite being considered a charismatic and enigmatic Antarctic predator, leopard seals are normally thought of as being solitary.

They are largely intolerant of each other but can be forced to hunt alongside one another when congregating in areas of abundant prey.

A new study analysing the previously unseen footage reports up to 36 seals seen feeding at the same king penguin colony in South Georgia.

It also highlights examples of two seals feeding on the same penguin carcass, the first evidence of such behaviour ever being recorded.

However, scientists add it is unclear if it is a case of true cooperation, or whether both seals were simply accepting the competitor so that they didn鈥檛 have to chase them away, potentially leading to them losing their prey completely.

Published in Polar Biology, the study was led by James Robbins, a Visiting Research Fellow at the 精品无码国产自产 and formerly with the British Antarctic Survey. He said:

鈥淟eopard seals are often portrayed as the villains 鈥 chasing fluffy penguins in Happy Feet and creating havoc in the Antarctic. In reality, little is known about these enigmatic creatures, and these observations provide key insights into their behaviour and social antics.
鈥淭he footage has given us an exciting new insight into the behaviour and lives of leopard seals. There is still so much that we don鈥檛 understand about these predators as they live in remote areas of the Antarctic and are often seen alone on an inaccessible iceberg. But I鈥檝e personally had over 500 encounters with leopard seals and have never seen two animals being so tolerant of each other.鈥

Leopard seal (Credit James Robbins)
Leopard seal (Credit James Robbins)
Leopard seal (Credit James Robbins)

The leopard seal footage was captured in St Andrews Bay and Right Whale Bay during October 2016.

It isn鈥檛 the first time that a documentary has allowed previously unknown behaviours to be captured on film. Past media expeditions have recorded killer whales creating waves to wash seals off icebergs, and leopard seals appearing to feed human divers.

In the latter case, it was assumed to be a rare case of gift-giving, but the authors of this study now suggest that cooperative feeding may be a more likely explanation.

They suggest it is more energetically expensive to defend a large kill than it is to tolerate kleptoparasitism (the stealing of food), and that rather than chasing away competitors, seals focus on each gaining some of the food without using large amounts of energy.

David Hocking from Monash University, another author on the paper, added:

鈥淭he remoteness of Antarctic ecosystems can make it challenging to connect with the wildlife there, but this new footage provides a rare window into that world. Early Antarctic explorers described leopard seals as the 鈥榩rinciple enemy of the penguin鈥, but most observations show seals targeting smaller penguin species. This study shows that even large adult king penguins are at risk when leopard seals are around.
鈥淭his study also provides a great example of how new technology is helping researchers to make close-hand observations of wild animals. By using a camera drone, the filmmakers were able to fly above the animals without disturbing them, revealing detailed behaviours that otherwise may have gone unnoticed to shore-based observers.鈥

The full study 鈥 Robbins et al: A rare observation of group prey processing in wild leopard seals (Hydrurga leptonyx) 鈥 will be published in Polar Biology, doi: 10.1007/s00300-019-02542-z.

Marine Institute

Representing 3000 staff, researchers and students, the 精品无码国产自产's Marine Institute is the first and largest such institute in the UK. 

We provide the external portal to our extensive pool of world-leading experts and state-of-the-art facilities, enabling us to understand the relationship between the way we live, the seas that surround us and the development of sustainable policy solutions.

Discover more about the Marine Institute

Marine Institute

Clearing

If you鈥檙e worried about your place at university this September, you don鈥檛 have to wait until A level results day to apply for Clearing.

If you haven鈥檛 applied to the 精品无码国产自产, you can pre-register your interest to receive priority treatment from our dedicated team of advisers on A level results day (Thursday 15 August 2019).

Alternatively, if you have already made an application with us, simply follow the steps below to find out more about what you need to do next.


Full list of course vacancies