نتایج جستجو برای: bulinus truncates
تعداد نتایج: 486 فیلتر نتایج به سال:
The Louisiana red swamp crayfish, Procambarus clarkii, which was introduced into east Africa in the 1950s or 1960s, has since widely dispersed. Previous work by our group has shown that P. clarkii can reduce populations of the molluscan intermediate hosts of human schistosomes through predatory and competitive interactions. Here, we investigate whether crayfish can reduce populations of Bulinus...
We find that imposing economic constraint on stock return forecasts based the Interquartile Range of equity premium can significantly strengthen predictive performance. Specifically, we construct a judgment mechanism truncates outliers in return. prove our approach realize more accurate information relative to unconstraint from perspective statistics and economics. In addition, new effectively ...
In an attempt to establish an ideal method for mass production of Calicophoron microbothrium metacercariae, a study was carried out to compare the shedding capacities of Bulinus tropicus naturally and experimentally infected with C. microbothrium. A total of 906 F1 B. tropicus between 4 and 5 weeks old were each experimentally infected with two C. microbothrium miracidia and monitored for 12 we...
The environment, the on-going global climate change and the ecology of animal species determine the localisation of habitats and the geographical distribution of the various species in nature. The aim of this study was to explore the effects of such changes on snail species not only of interest to naturalists but also of importance to human and animal health. The spatial distribution of freshwa...
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