A Method For Estimating Possible Parasite-Related Host Mortality, Illustrated Using Data From Callitetrarhynchus Gracilis (Cestoda: Trypanorhyncha) in Lizardfish (Saurida Spp.)

摘要: The frequency distribution of parasites in hosts commonly follows a negative binomial or similar distribution. Under certain conditions the magnitude parasite-associated host mortality can be estimated by comparing tail observed to that predicted from first few points data. For technique work following assumptions need met: lightly infected fish must rare; infection and consequent occur only younger than those sampled; parasite at time should conform known probability method was applied distributions blastocysts Callitetrarhynchus gracilis 898 Saurida tumbil (Bloch) 5013 S. undosquamis (Richardson). Parasite-associated calculated least 11 % males 2 females. undosquamis, about 5% 3% numbers produce O.5 death, parasitological equivalent an LD 50 were 3.4 5.7 for females, 1.8 3.2 females respectively.