New Penguin Species Found in New Zealand
A team from the University of Adelaide, the University of Otago, and Canterbury Museum in New Zealand has identified a previously unknown penguin species while conducting research on New Zealand's endangered yellow-eyed penguin, one the world's rarest penguin species and the subject of an extensive conservation effort, according to a Nov. 19 press release.
The Waitaha penguin became extinct after Polynesian settlement but before 1500 AD, creating an opportunity for the yellow-eyed penguin to subsequently colonize the New Zealand mainland from its base in the sub-Antarctic islands.
"Our findings demonstrate that yellow-eyed penguins on mainland New Zealand are not a declining remnant of a previous abundant population but came from the sub-Antarctic relatively recently and replaced the extinct Waitaha Penguin," said team member Jeremy Austin, Ph.D., deputy director of the Australasian Centre for Ancient DNA.
"Previous analysis of fossil records and anecdotal evidence suggested that the yellow-eyed penguin was more abundant and widespread in the past, but it now appears they have only been around for 500 years," he said.
The team, led by University of Otago doctoral student Sanne Boessenkool, identified the large-bodied Waitaha Penguin using ancient DNA from prehistoric bones, combined with traditional morphological techniques
"Competition between the two species previously prevented the yellow-eyed penguin from expanding northwards but environmental changes in the predator population, such as the severe decline of sea lions, may have facilitated their colonization in the South Island."
Researchers say the surprising finding demonstrates the unexpected ways in which species can respond to human and environmental impacts and the role of extinction events in shaping our current environment.
The team's findings have been published in the Proceedings of the Royal Society B: Biological Sciences, an international biological research journal.