2024 Parasite aggregation

Parasite aggregation

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August undefined, 2024

WebAggregated 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 … WebAggregation was found to be a dynamic process that varied with year, season, host sex, age class, and myxomatosis. Yearly and seasonal changes are thought, in the main, to be the result of variations in weather conditions acting …

Chapter 2: Heterogeneities in macroparasite infections: …

WebDec 3, 2024 · Water removal and replenishment changes herbivore, dung, and parasite aggregation (Fig. 3), and drier contexts amplify aggregations and parasite density near … WebMay 1, 2014 · Three methods to measure parasite aggregation, namely the Hoover, coefficient of variation and I10 indices, are compared using field data from a range of fish parasites, suggesting that the Hoover index is to be preferred as a measure of aggregation although difficulties remain in deriving theoretical and operational definitions of … chigwell golf course

Parasite preferences for large host body size can drive …

WebAug 24, 2024 · Parasite species was an important predictor of aggregation in models. Despite variation in Dacross samples and years, relatively consistent aggregation was … 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 … 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 … gotham wok

Measuring aggregation in parasite populations Journal …

Probability distributions of helminth parasite burdens within the …

WebNov 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 WebDec 3, 2024 · Water removal and replenishment changes herbivore, dung, and parasite aggregation (Fig. 3), and drier contexts amplify aggregations and parasite density near water (Fig. 4). Thus, when water ... gotham wisconsin bat caveWebbelow 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 ... gotham wisconsin map

"WebDOI: 10.1016/S0020-7519(01)00270-3 Corpus ID: 10817552; Patterns of parasite aggregation in the wild European rabbit (Oryctolagus cuniculus). @article{Boag2001PatternsOP, title={Patterns of parasite aggregation in the wild European rabbit (Oryctolagus cuniculus).}, author={Brian Boag and Joanne Lello and Andy Fenton … " - Parasite aggregation

Parasite aggregation

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 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 origin of this almost...

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WebApr 6, 2009 · We assess the degree of aggregation as the negative binomial parameter, k, and use the model to examine the influence of various factors on changes in … WebAn aggregated distribution, commonly found among predators and parasites, is a highly uneven statistical distribution pattern in which they collect or aggregate in regions, which …

WebNov 1, 1993 · A simple new measure of parasite aggregation is described, the index of discrepancy (D). It quantifies the difference between the observed parasite distribution, and the hypothetical distribution that corresponds to the ideal case where all hosts harbour the same number of parasites. WebApr 25, 2005 · Macroparasites are almost always aggregated across their host populations, hence the Negative Binomial Distribution (NBD) with its exponent parameter k is widely used for modelling, quantifying or analysing parasite distributions.

Web5Parasite aggregation, a recurring pattern in macroparasite infections, is con- 6sidered one of the “laws” of parasite ecology. Few hosts have a large number 7of parasites while most hosts have a low number of parasites. Phenomenologi- 8cal models of host-parasite systems thus use the negative-binomial distribution. 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 …

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., 1996;McVinish and Lester, 2024).

WebConversely, 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 … gotham women\\u0027s soccerWebMay 1, 2014 · Here, we have described an intuitive and biologically reasonable alternative to the NBD (static k) method for modelling parasite aggregation among hosts.Our model … gotham without oil fryerWebAt 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, because all but one host are uninfected. For a threshold fitness function, then, W,, increases monotonically with the degree of parasite aggregation if the mean number of parasites … gotham women\\u0027s soccer teamWebAug 1, 1993 · Three methods to measure parasite aggregation, namely the Hoover, coefficient of variation and I10 indices, are compared using field data from a range of fish parasites, suggesting that the Hoover index is to be preferred as a measure of aggregation although difficulties remain in deriving theoretical and operational definitions of … gotham woffWebApr 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., … gotham with cameron chigwell lawn tennis clubWebSep 16, 2024 · The main finding of this study is the increasing trend for greater parasite aggregation as prevalence declines to low levels, reflected in the low values of the negative binomial parameter k in clusters with low hookworm prevalence. Localized climatic and socioeconomic factors are investigated as potential drivers of these observed ... gotham women\u0027s soccer team