Parasite aggregation

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August undefined, 2024

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 and longevity ( Gleave et al., 2016; Hudson, Newborn & … 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 …

Identifying sources of variation in parasite aggregation - PeerJ

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, 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 … 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) … binary of 93

Three methods to measure parasite aggregation using

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 … WebAug 24, 2024 · Parasite species was an important predictor of aggregation in models. Despite variation in Dacross samples and years, relatively consistent aggregation was … 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 … binary of 89

Modelling macroparasite aggregation using a nematode

Explaining variability in parasite aggregation levels …

WebMay 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 … 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 … cypress woods senior living kingwoodWebbelow 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 ... binary of 95

"WebApr 11, 2024 · 1.Introduction. Parasite abundance (number of parasites an individual host harbours, including 0) is rarely spread evenly among hosts (Reiczigel et al., 2024).Typically, a minority of hosts harbour the majority of parasites and by extension experience the bulk of the deleterious physiological and fitness impacts of infection (Poulin, 2007).This … " - Parasite aggregation

Parasite aggregation

Quantitative Monitoring of Selected Groups of Parasites in …

WebJan 30, 2024 · Explaining parasite aggregation: more than one parasite species at a time Studies generally have neglected parasite-centric views in explorations of whether the … WebThe distribution of parasites in host populations is integral to simulations of parasite populations. We compared three methods to measure parasite aggregation, namely the …

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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., 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 …

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 … WebApr 28, 2024 · For an initial mean parasite burden m 0 and aggregation k 0 we are able to calculate n ∗ up to a maximum of 15, for given MDA coverage c, non-compliance correlation ρ and drug efficacy ɛ, using the analytical expressions for the mean worm burden and aggregation level from §2. It is unrealistic for a location to receive 15 rounds of ...

WebFeb 17, 2015 · The reality of parasite aggregation on hosts has been discussed in many previous studies (Anderson and May, 1978;Shaw and Dobson, 1995;Poulin, 2007; … 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 …

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 ...

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 … cypress woods schoolWebAn aggregated distribution, commonly found among predators and parasites, is a highly uneven statistical distribution pattern in which they collect or aggregate in regions, which … cypresswood stationWebNov 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 binary of 97 10WebApr 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. cypress woods real estate binary of 92WebParasite load is a measure of the number and virulence of the parasites that a host organism harbours. Quantitative parasitology deals with measures to quantify parasite loads in samples of hosts and to make … cypress woods tee timesWebApr 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. binary of 98