scholarly journals Digest: The Red Queen hypothesis demonstrated by the Daphnia -Caullerya host-parasite system†

Evolution ◽  
2018 ◽  
Vol 72 (3) ◽  
pp. 715-716
Author(s):  
María Martín-Peciña ◽  
Carolina Osuna-Mascaró
Keyword(s):  
Red Queen Hypothesis ◽  
Red Queen ◽  
Host Parasite ◽  
The Red Queen

scholarly journals Bridging the gap between theory and data: the Red Queen Hypothesis for sex

2019 ◽  
Author(s):  
Sang Woo Park ◽  
Benjamin M Bolker
Keyword(s):  
Sexual Reproduction ◽  
Empirical Studies ◽  
Field Studies ◽  
Host Population ◽  
Data Sets ◽  
Red Queen Hypothesis ◽  
Red Queen ◽  
Estimated Parameters ◽  
Host Parasite ◽  
The Red Queen

AbstractSexual reproduction persists in nature despite its large cost. The Red Queen Hypothesis postulates that parasite pressure maintains sexual reproduction in the host population by selecting for the ability to produce rare genotypes that are resistant to infection. Mathematical models have been used to lay theoretical foundations for the hypothesis; empirical studies have confirmed these predictions. For example, Lively used a simple host-parasite model to predict that the frequency of sexual hosts should be positively correlated with the prevalence of infection. Lively et al. later confirmed the prediction through numerous field studies of snail-trematode systems in New Zealand. In this study, we fit a simple metapopulation host-parasite coevolution model to three data sets, each representing a different snail-trematode system, by matching the observed prevalence of sexual reproduction and trematode infection among hosts. Using the estimated parameters, we perform a power analysis to test the feasibility of observing the positive correlation predicted by Lively. We discuss anomalies in the data that are poorly explained by the model and provide practical guidance to both modelers and empiricists. Overall, our study suggests that a simple Red Queen model can only partially explain the observed relationships between parasite infection and the maintenance of sexual reproduction.

scholarly journals Antibiotic-driven Escape of Host in a Parasite-induced Red Queen Dynamics

2018 ◽  
Author(s):  
Elizabeth L. Anzia ◽  
Jomar F. Rabajante
Keyword(s):  
Mathematical Model ◽  
Stable Equilibrium ◽  
Parasitic Infections ◽  
Red Queen ◽  
Good Practices ◽  
Low Level ◽  
High Level ◽  
Host Parasite ◽  
The Red Queen

AbstractWinnerless coevolution of hosts and parasites could exhibit Red Queen dynamics, which is characterized by parasite-driven cyclic switching of expressed host phenotypes. We hypothesize that the application of antibiotics to suppress the reproduction of parasites can provide opportunity for the hosts to escape such winnerless coevolution. Here, we formulate a minimal mathematical model of host-parasite interaction involving multiple host phenotypes that are targeted by adapting parasites. Our model predicts the levels of antibiotic effectiveness that can steer the parasite-driven cyclic switching of host phenotypes (heteroclinic oscillations) to a stable equilibrium of host survival. Our simulations show that uninterrupted application of antibiotic with high-level effectiveness (> 85%) is needed to escape the Red Queen dynamics. Intermittent and low level of antibiotic effectiveness are indeed useless to stop host-parasite coevolution. This study can be a guide in designing good practices and protocols to minimize risk of further progression of parasitic infections.

The Red Queen hypothesis and geographical parthenogenesis in the alpine hawkweed Hieracium alpinum (Asteraceae)

2017 ◽  
Vol 122 (4) ◽  
pp. 681-696 ◽  
Author(s):  
Matthias Hartmann ◽  
Michal Štefánek ◽  
Pavel Zdvořák ◽  
Petr Heřman ◽  
Jindřich Chrtek ◽  
...  
Keyword(s):  
Red Queen Hypothesis ◽  
Red Queen ◽  
Geographical Parthenogenesis ◽  
The Red Queen

scholarly journals On the Causes of Selection for Recombination Underlying the Red Queen Hypothesis

2009 ◽  
Vol 174 (S1) ◽  
pp. S31-S42 ◽  
Author(s):  
Marcel Salathé ◽  
Roger D. Kouyos ◽  
Sebastian Bonhoeffer
Keyword(s):  
Red Queen Hypothesis ◽  
Red Queen ◽  
Selection For ◽  
The Red Queen
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