Epizootics of diphyllobothriidean cestodes appear to be simple, but deceptive similarity conceals the myriad ways in which these events are shaped by complex abiotic and biotic interactions. In Dog Bone Lake, Alaska, an epizootic of Schistocephalus pungitii infecting the ninespine stickleback (Pungitius pungitius) was short-lived. Its duration, with a peak that lasted only 1 yr, was shorter than for previously documented epizootics in Schistocephalus solidus. The ability of the ninespine stickleback to sustain infections, which appears to be related to species-specific characteristics of the host, may have played an important role in shaping the epizootic. Moreover, the epizootic of S. pungitii was not coincident with those observed for S. solidus in earlier studies within this region, supporting the hypothesis that processes involved in epizootics largely reflect local (lake-level) influences on population dynamics of the parasite. The outbreak occurred at a time when the host population was not relatively dense, which is inconsistent with epidemiological theory and may be a consequence of the parasite′s indirect life cycle. The variability of the unregulated and unstable epizootic events of diphyllobothriidean cestodes presents a challenge to understand the ecological and evolutionary factors influencing the prevalence of infections in host populations.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.