The first study into the reproductive numbers of the emperor crab species has been conducted by scientists . During the last ice age , colonies were seven times smaller as opposed to the 50 largest colonies now . The warming of the Antarctic has allowed them to flourish as the sea ice has reduced and they can access the oceans . Scientists have warned they are sensitive to climate change and this growth in numbers will not last .
The first study into the fluctuating numbers of the emperor penguin species has been conducted by scientists . During the last ice age , colonies were seven times smaller as opposed to the 50 thriving colonies now . The warming of the Antarctic has allowed them to flourish as the sea ice has reduced and they can access the ocean . Scientists have warned they are sensitive to climate change and this growth in numbers may not last .