According to the passage, Kays does not think that park protection on its own is a long-term solution in order to save the lions ----.

The lions of the greater Tsavo region in south
eastern Kenya have a long history of conflict with
humans. Most famously, two lions killed and ate
more than 130 railroad workers during a nine-month
rampage in 1898. Today humans do most of the
killing, persecuting the carnivores in retaliation for
their raids on livestock. Roland Kays, the curator of
mammals at the New York State Museum in Albany,
says that if the trend continues and escalates, these
African lions may face extinction. Currently a
number of Tsavo lions are afforded protection within
the confines of the Tsavo National Parks, which
encompass about 20,000 square kilometres in
southeastern Kenya. Kays says he does not believe
park protection alone guarantees the lions' longterm
conservation. He believes that the carnivores
require vast territories and that some lion prides
exist entirely outside park boundaries. According to
him, the presence of the parks makes this region a
relative stronghold for lions in the region, and so it is
important to make it as strong as possible.