| development and application of a delayed-release anthelmintic intra-ruminal bolus system for experimental manipulation of nematode worm burdens. | in order to quantify the impact of parasites on host population dynamics, experimental manipulations that perturb the parasite-host relationship are needed but, logistically, this is difficult for wild hosts. here, we describe the use of a delayed-release anthelmintic delivery system that can be administered when the hosts can be captured and its activity delayed until a more appropriate period in the host-parasite cycle. our model system is svalbard reindeer infected with a nematode parasite, m ... | 2012 | 22417532 |