s. scientists raise the alarm after discovering a dramatic form in the number of these mammals. since then an international group of scientists has come to the ski arlen's each year. to begin with all the adults to shoot away from the beach then they were called the pups so as to estimate the size of the population more accurately the newborns of intact and given a number. the procedure makes it possible to track the animals movements in the sea of a halt or. roughly twenty years which is the average life span of a sea lawyer. before we see what it was for obviously the animals don't like being disturbed but then it's only one day during their mating season was set a particular day aside when the harm done to the sea lion population is reduced to a minimum say. the procedure has been perfected down to the smallest detail to start vets administer an anaesthetic to the sea law and pups to ensure a painless operation. you've been on the sea lions breathe in a special gas for about three minutes he falls asleep and wake substance and minutes later it doesn't take long to recover from the anaesthetic. just move with him i am going to take some blood samples