a significant trendp = 0.046
Statistical tests showed that uptake was significantly greater downstream of the branch than upstream in the immature rabbits (p = 0.0024); there were no such differences for the mature and ex-breeder rabbits (p = 0.68 and p = 0.31 respectively), whereas in the >5 year old female rabbits there was a significant trend in the opposite direction (p = 0.046).