Spatial distribution on pasture of infective larvae of the gastro-intestinal nematode parasites of sheep.
The horizontal distributions of infective larvae on pasture grazed by sheep have been investigated. Using Taylor's Power Law it was found that larvae had a more aggregated distribution in September than August, the Law index of aggregation being 1.97 and 1.89 for the 2 months, respectively. However, at each time the degree of aggregation remained fairly constant for a range of spacings between points from 5 to 30 m. These results suggest that Taylor's Power Law could be used as a basis for devising an efficient pasture sampling strategy. More data are required, however, to determine the extent to which aggregation of the larvae varies with time of the year.
Boag
B
B
Topham
P B
PB
Webster
R
R
D000704:Analysis of Variance; D000818:Animals; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D007814:Larva / Q000502:physiology; D009348:Nematoda / Q000502:physiology*; D009349:Nematode Infections / Q000469:parasitology / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*