Okay, here are the steps to calculate the number of otters needed to feed the killer whale pod for one year:
We have 5 female and 1 male killer whale, so a total of 6 whales.
From the table, we see that a female killer whale eats 154 otters per year and a male eats 290 otters per year.
So the total number of otters needed for the females is:
5 females * 154 otters/female = 770 otters
And for the male it is:
1 male * 290 otters/male = 290 otters
Adding the two gives the total for the whole pod:
770 otters + 290 otters = 1060 otters
Since the sea otter population is 50/50 male/female, we will assume half of the total otters needed (1060) are females and half are males.
There are 365 days in a year. So the number of otters needed per day for the pod to survive is:
1060 otters / 365 days = 2.9 otters per day
So in summary, for the killer whale pod to survive feeding only on sea otters for one year, they would need to consume a total of 1060 sea otters, or about 2.9 otters per day.