Parasite aggregation
WebThe distribution of parasites in host populations is integral to simulations of parasite populations. We compared three methods to measure parasite aggregation, namely the Hoover, coefficient of variation and I 10 indices, using field data from a range of fish parasites. These included anisakid nematodes, trypanorhynch cestodes and … WebFeb 17, 2015 · The distribution of parasites in hosts is typically aggregated: a few hosts harbour many parasites, while the remainder of hosts are virtually parasite free. The …
Parasite aggregation
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WebApr 1, 2024 · Aggregation is of importance in aquatic ecology concerning the factors such as reducing the size of parasite population and parasite fecundity (Wilson et al., … WebThe distribution of parasites in host populations is integral to simulations of parasite populations. We compared three methods to measure parasite aggregation, namely the …
WebAt intermediate levels of parasite aggregation, then Wh>0, because some hosts have fewer than i, parasites. And with extreme clumping, as above, Wh approaches 1, … WebFeb 23, 2024 · Parasite aggregation is an important law given that parasites are expected to show intensity-dependent effects on their hosts, such as reductions in host fecundity …
WebApr 26, 2024 · observed relationship between the degree of parasite aggregation and the prevalence of infection within human host populations for soil-transmitted helminth and schistosome infections Transactions of The Royal Society of Tropical Medicine and Hygiene Oxford Academic AbstractBackground. WebJan 24, 2013 · Log-transformed variance in numbers of parasites per host was regressed against log mean number across all samples; the strong relationship (r 2 = 0·88) …
WebFeb 3, 2024 · Parasite aggregation, a recurring pattern in macroparasite infections, is considered one of the “laws” of parasite ecology. Few hosts have a large number of parasites while most hosts have a low number of parasites. Phenomenological models of host-parasite systems thus use the negative-binomial distribution. However, to infer the …
WebOct 16, 2024 · Parasite aggregation is a frequently occurring phenomenon where majority of the parasites accumulate in the smaller fraction of the host population while many … by commodity\u0027sWebApr 1, 2024 · Aggregation is of importance in aquatic ecology concerning the factors such as reducing the size of parasite population and parasite fecundity (Wilson et al., 1996;McVinish and Lester, 2024). cf shop mallsWebAggregated distributions among individual hosts are a defining feature of metazoan parasite populations. Heterogeneity among host individuals in exposure to parasites or in susceptibility to infection is thought to be the main factor generating aggregation, with properties of parasites themselves ex … cf shipper\u0027sWebNov 1, 1993 · The strong relationship between aggregation levels andmean infection levels indicated that aggregation levels are tightly constrained by mean infection levels, and that only a small proportion of the observed variability in parasite aggregation levels remains to be accounted for by other factors. 130 PDF View 1 excerpt, cites background cf-shopsWebparasites may still have significant consequences on the competitive outcome. Sensitivity analy-sis suggests that an increased degree of parasite aggregation among hosts reduces the ability of parasites to regulate host populations and decreases parasite equilibrium density. Finally, micro-and macroparasite models are compared. cfshowchoirs.ludus.comWebConversely, parasite aggregation was affected most strongly by the abiotic factors of season and region, which were supported by four different measures of parasite aggregation (the corrected moment estimate k, Taylor's Power Law, the Index of Discrepancy D, and Boulinier's J). Pseudamphistomum truncatum was highly aggregated … by commendation\\u0027sWebbelow which the parasite can still regulate. Aggregation will tend to stabilize the host–parasite dynamics, but as the distribution becomes more random, the population will become increasingly ... by commoner\u0027s