| the relationship of sex and ectoparasite infestation in the water rat scapteromys aquaticus (rodentia: cricetidae) in la plata, argentina. | i studied the relationship between sex and infestation with ectoparasites in the water rat scapteromys aquaticus from la plata river marshland, argentina. the relative density's index (rdi) for males was 3.90% (females 3.60%). a total of 2653 ectoparasites were collected on 33 male hosts, and 1945 on 31 females. ectoparasite specific richness (s) and diversity (h) were s = 14, h = 1.17 on males, and s = 10, h = 1.52 on females. the similarity between male and female rodents according to their ec ... | 2006 | 18494333 |