| here and there: a preliminary note on the prevalence of an alien rhizocephalan parasite at the southern and northern limits of its introduced range. | the erythrean invasive swimming crab charybdis longicollis established dense populations in the levantine basin of the mediterranean sea in the mid 20th century. the crabs were subsequently parasitized by the rhizocephalan heterosaccus dollfusi , itself an erythrean alien. in may 2008, the crab populations were sampled at the southern (israel) and northern (turkey) limits of its introduced range. the prevalence of infection was 3 times as high, and multiple externae-bearing hosts more than 4 tim ... | 2009 | 19530888 |