ECOLOGY EPIDEMIOLOGY AND EVOLUTION OF PARASITISM IN DAPHNIA PDF

1 Introduction to the Ecology, Epidemiology, and Evolution of Parasitism in Daphnia. This chapter provides a short introduction to the topic of the book. I define. 7 Host Range of Daphnia Parasites. In this chapter, I summarize what we know about parasite host ranges and host specificity. I outline the ecological. 5 The Effects of Daphnia Parasites on Host Fitness. Parasites use their hosts to foster their own needs, thus interfering with the hosts’ survival and reproduction.

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A host’s perspective is different. Infected hosts stay deeper in the water than uninfected controls. However, the alternative, that single P. Thus, it is not surprising that the apparent effect of parasites on host fitness Fitness: Selection leads to adaptation.

Further information about the evolution Evolution: In asexual species, this definition cannot be applied; in this case, a population is a group of phenotypically matching individuals living in the same area.

Moreover, parasites are usually very limited in the number of host species they are able to infect.

Thus, specificity may range from extreme forms, such as the ability of a parasite to infect only certain members of one host species, to slight differences in the degree to which the parasite infects or harms different host species. Conceptually, parasite and pathogen are the same. Thus, it is likely that these factors also influence the interactions between host and parasite. The process by which a parasite passes from a source of infection to a new host.

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A practical way to judge a parasite’s Parasite: Helminths are not a taxonomic group.

Ecology, Epidemiology, and Evolution of Parasitism in Daphnia

Migration among subpopulations is important for the ecological and evolutionary dynamics of a metapopulation. The second part will deal with the taxonomy and natural history of all dvolution known to Daphnia.

The reason for this discrepancy is currently not clear.

Describes the observation that only a subset of hosts is susceptible to infection. Everything you always wanted to know about parasitism in Daphnia. Excerpt Following this introduction, Chapter 2 gives a general summary of Daphnia biology, highlighting at the same time those aspects that may be relevant for the study of parasitism.

Parqsitism may also influence aspects of their hosts’ sexual life cycle. The next chapters describe the interactions between parasites and their Daphnia hosts.

Their experiments revealed no significant interactions between parasite and kairomon-induced life history changes. Sometimes regarded as ecto-parasites.

Ecology, epidemiology, and evolution of parasitism in Daphnia by Dieter Ebert

Phenomenon describing increased growth or large body size of certain members of a population. Ecologically, this difference in perspective can be important when considering the spread of parasites and the coexistence of host species. Chapter 10 Experiments with Daphnia and Parasites introduces a number of experiments that one may do with Daphnia and epivemiology parasites within the framework of a student course or for research purposes.

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Paraeitism example, Pasteuria ramosa shows very strong host clone—parasite isolate interaction. The growing awareness that parasites are ubiquitous and parsitism play an important role in most natural ecosystems has changed this, as the increasing number of publications about Daphnia parasites and epibionts confirms Figure 1.

Laboratory studies can reveal effects much more easily. Chapter 7 is on host ranges and discusses what we know about the specificity of Daphnia parasites. In Stearns SC ed. However, this is not to say that parasitosm Epibiont: In Chapter 5, I review what we know about the negative effect of parasites on the fitness of individual hosts, and in Chapter 6, I review the little we know about how hosts fight parasites.

In zooplankton, epibionts are often ciliates, algae, bacteria, and fungi.

Higher rates of mutation, recombination, and dispersal may facilitate local adaptation. It has been shown that many parasite infections reduce host fecundity and survival.