Trematode prevalence and richness in ponds in Teton County, Wyoming
نویسندگان
چکیده
Trematodes have complex life cycles with infective stages in multiple hosts including species of conservation concern. We conducted a field survey of seven ponds in Teton County, Wyoming for trematode prevalence and richness. We collected snails from each location and determined trematode prevalence by shedding snails and determined trematode richness by dissection of infected snails. At each location we also measured temperature, conductivity, and dissolved oxygen. We found trematode prevalence varied by location and infection rates of 15% or lower in most snail taxa. Snails in the families Physidae and Lymneaidae, the two most common families in our survey, were more often infected with trematodes than other snails. We found four different trematode cercarial types: echninostome cercaria, furcocercous cercaria, monostome cercariae, and xiphidiocercaria, which translates into 11 possible families of trematodes. Although we found significant differences in abiotic factors among locations, none of the abiotic factors that we examined predicted trematode prevalence or richness. We found levels of trematode prevalence that are similar to reports in other locations. Prior research also indicates that trematode infections are usually not fatal to waterfowl, but that young birds are more susceptible to infections. We advise waterfowl managers to inoculate captive bird population to reduce trematode and other parasitic worm infections. We also advise against the
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