Penguin cam captures hunt for prey

Penguin cam captures hunt for prey
Penguins foraging as a group. Credit: John Arnould, Deakin University

Little penguins were more likely to work together to hunt schooling prey than solitary prey, according to observations made using animal-borne cameras published Dec. 2, 2015 in the open-access journal PLOS ONE by Grace Sutton from the Deakin University, Australia, and colleagues.

Group foraging in cooperative animals provides predators with advantages over , but for less cooperative colonial-breeding predators, like the little penguin, the benefits of group foraging are less clear due to the potential for competition between . The authors of this study used animal-borne cameras on 21 little penguins from two breeding colonies in south-eastern Australia to determine the prey types, strategies, and success of little penguins, a small, that extensively forages with other little penguins.

The researchers found that little penguins had a higher probability of associating with each other when hunting schooling prey than when encountering solitary prey. Surprisingly, individuals were no more successful at capturing schooling prey than solitary prey. However, success preying on was similar or greater when individual penguins hunted on their own rather than together. The authors suggest that individual penguins may trade-off the potential benefits of solitary hunting to increase the probability of detecting prey by associating with other little penguins.

Grace Sutton says: "This study showed little penguins gained no benefit in capturing prey when from hunting in groups, suggesting individuals may forage in groups to improve detection of prey or avoid predation but, once they find prey, it is every penguin for themselves."

A representative foraging behavior in little penguins (a). Credit: Sutton et al.
Penguin cam captures hunt for prey
Camera on a penguin. Credit: John Arnould, Deakin University

Explore further

Little penguins forage together

More information: Grace J. Sutton et al. Benefits of Group Foraging Depend on Prey Type in a Small Marine Predator, the Little Penguin, PLOS ONE (2015). DOI: 10.1371/journal.pone.0144297
Journal information: PLoS ONE

Citation: Penguin cam captures hunt for prey (2015, December 16) retrieved 17 August 2019 from https://phys.org/news/2015-12-penguin-cam-captures-prey.html
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