Some observations on egg production and autoreinfection of Reighardia sternae (Diesing, 1864), a pentastomid parasite of the herring gull.

Egg production by Reighardia sternae, implanted at various stages of maturity into the interclavicular air sacs of captive gulls, is described. Females produce only 2900 eggs per lifetime over a short patent period of 1-3 days. The problem of a direct life-cycle in relation to this unusually low fecundity is discussed, and speculation is advanced concerning a possible parasitic behavioural trait which could facilitate direct transmission. The hazards of the latter are also offset by auto-reinfection.