Sunday 22 December 2013

Elephant seal pups


This year turned out to be a lucky one for Bird Island residents with two elephant seal pups born on Landing beach, which is the next beach over from us. One morning when Craig was heading over to SSB (the seal study beach) to do some work on the infrastructure there, when we got an excited call over the radio. For a few days there had been a couple of fat females lying on the beach next to one of the colossal males. On this particular morning Craig had spotted a black lump lying next to one of the females, and on closer inspection it turned out to be a pup!

Elephant seal mother protecting her new born pup from a brown skua that fancied a taste of umbilical cord
We all rushed over to take a look from a distance at the newborn. Elephant seal mothers are quite nervous, so we didn’t want to get too close in case we scared her and she abandoned the pup. Mother and pup were being harassed by a pair of brown skuas that saw the pups birth as a hearty meal opportunity. The skuas kept grabbing at the pups umbilical cord trying to rip bits off. The mother was getting very agitated with them and tried to protect her pup as best she could. It had  been slim pickings for the skuas since they arrived back on the island after winter, so they weren’t giving up without a fight. 

Over the next couple of days the pup was joined by a second pup, born to an adjacent female. The pups then spent most of their time sleeping, or suckling the extremely fatty milk from their mothers. They had a lot growing to do before their mothers left them after only a couple of weeks of nursing. The pups seemed to grow at a huge rate (up to 3.6kg per day), and then began moulting their black thick fur, to reveal the typical brown elephant seal fur below. 

I think this one was a bit surprised about being born onto a busy, noisy beach
The mothers left the pups when they still looked far too young to us, but the pups seemed content enough, and the smaller of the two was often seen attempting to suckle from the other pup. Eventually they began to explore their surroundings and paddle in the water. Recently one of them swam around to Freshwater Beach where the base is located. Hannah and Cian (our two seal biologists) had a close encounter with it when it decided they looked interesting and came over to investigate them. 
Ele pup taking a rest

Now they are fully moulted they are ready to venture out to sea to begin feeding themselves as they have lost a lot of weight since their mothers left. Let’s hope that in a few years they return to Bird Island to breed, rather than heading to the South Georgia mainland.
The two pups once their mums had gone back to sea. The male fur seal in the background seemed to think that they were female fur seals not two week old ele pups!